Title of Invention

A COMPACT MULTI-SPEED TRANSMISSION

Abstract A transmission is provided having an input member, an output member, four planetary gear sets, a plurality of coupling members and a plurality of torque transmitting devices. Each of the planetary gear sets includes first, second and third members. The torque transmitting devices may include clutches and brakes.
Full Text MULTI-SPEED TRANSMISSION
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application claims the benefit of U.S. Provisional
Application No. 60/879,956 filed on January 11, 2007. The disclosure of the
above application is incorporated herein by reference.
FIELD
[0002] The invention relates generally to a multiple speed transmission
having a plurality of planetary gear sets and a plurality of torque transmitting
devices and more particularly to a transmission having eight or more speeds,
four planetary gear sets and a plurality of torque transmitting devices.
BACKGROUND
[0003] The statements in this section merely provide background
information related to the present disclosure and may or may not constitute prior
art.
[0004] A typical multiple speed transmission uses a combination of
friction clutches, planetary gear arrangements and fixed interconnections to
achieve a plurality of gear ratios. The number and physical arrangement of the
planetary gear sets, generally, are dictated by packaging, cost and desired speed
ratios.
1

[0005] While current transmissions achieve their intended purpose, the
need for new and improved transmission configurations which exhibit improved
performance, especially from the standpoints of efficiency, responsiveness and
smoothness and improved packaging, primarily reduced size and weight, is
essentially constant. Accordingly, there is a need for an improved, cost-effective,
compact multiple speed transmission.
SUMMARY
[0006] A transmission is provided having an input member, an output
member, four planetary gear sets, a plurality of coupling members and a plurality
of torque transmitting devices. Each of the planetary gear sets includes first,
second and third members. The torque transmitting devices are for example
clutches and brakes.
[0007] An embodiment of the transmission includes an input member,
an output member, first, second, third and fourth planetary gear sets each having
first, second and third members, a first interconnecting member continuously
interconnecting the first member of the first planetary gear set with the first
member of the fourth planetary gear set, a second interconnecting member
continuously interconnecting the third member of the first planetary gear set with
the second member of the second planetary gear set, a third interconnecting
member continuously interconnecting the first member of the second planetary
gear set with the first member of the third planetary gear set, and a fourth
interconnecting member continuously interconnecting the third member of the
2

third planetary gear set with the second member of the fourth planetary gear set.
Five torque transmitting mechanisms are selectively engageable to interconnect
one of the first, second, and third members with another of the first, second, third
members, and a stationary element. The torque transmitting mechanisms are
selectively engageable in combinations of at least three to establish at least eight
forward speed ratios and at least one reverse speed ratio between the input
member and the output member.
[0008] In one aspect of the present invention, a first of the five torque
transmitting mechanisms is selectively engageable to interconnect the second
member of the first planetary gear set with at least one of the first member of the
second planetary gear set and the first member of the third planetary gear set.
[0009] In another aspect of the present invention, a second of the five
torque transmitting mechanisms is selectively engageable to interconnect the
third member of the first planetary gear set with at least one of the first member
of the second planetary gear set and the first member of the third planetary gear
set.
[0010] In yet another aspect of the present invention, a third of the five
torque transmitting mechanisms is selectively engageable to interconnect the
third member of the second planetary gear set with at least one of the second
member of the fourth planetary gear set and the third member of the third
planetary gear set.
3

[0011] In yet another aspect of the present invention, a fourth of the
five torque transmitting mechanisms is selectively engageable to interconnect the
first member of the fourth planetary gear set with the stationary element.
[0012] In yet another aspect of the present invention, a fifth of the five
torque transmitting mechanisms is selectively engageable to interconnect the
third member of the fourth planetary gear set with the stationary element.
[0013] In yet another aspect of the present invention, the first members
are sun gears, the second members are carrier members, and the third members
are ring gears.
[0014] In yet another aspect of the present invention, the input member
is continuously interconnected with the second member of the first planetary gear
set and wherein the output member is continuously interconnected with the
second member of the third planetary gear set.
[0015] In yet another aspect of the present invention, two of the torque
transmitting mechanisms are brakes and three of the torque transmitting
mechanisms are clutches.
[0016] In yet another aspect of the present invention, the stationary
element is a transmission housing.
[0017] Another embodiment of the transmission includes an input
member, an output member, first, second, third and fourth planetary gear sets
each having a sun gear, a planet carrier member and a ring gear, wherein the
input member is continuously interconnected with the planet carrier member of
the first planetary gear set and the output member is continuously interconnected
4

with the planet carrier member of the third planetary gear set, a first
interconnecting member continuously interconnecting the sun gear of the first
planetary gear set with the sun gear of the fourth planetary gear set, a second
interconnecting member continuously interconnecting the ring gear of the first
planetary gear set with the planet carrier member of the second planetary gear
set, a third interconnecting member continuously interconnecting the sun gear of
the second planetary gear set with the sun gear of the third planetary gear set,
and a fourth interconnecting member continuously interconnecting the ring gear
of the third planetary gear set with the planet carrier member of the fourth
planetary gear set. A first torque transmitting mechanism is selectively
engageable to interconnect the planet carrier member of the first planetary gear
set with at least one of the sun gear of the second planetary gear set and the sun
gear of the third planetary gear set, a second torque transmitting mechanism is
selectively engageable to interconnect the ring gear of the first planetary gear set
with at least one of the sun gear of the second planetary gear set and the sun
gear of the third planetary gear set, a third torque transmitting mechanism is
selectively engageable to interconnect the ring gear of the second planetary gear
set with at least one of the planet carrier member of the fourth planetary gear set
and the ring gear of the third planetary gear set, a fourth torque transmitting
mechanism is selectively engageable to interconnect the sun gear of the fourth
planetary gear set with a stationary element, and a fifth torque transmitting
mechanism is selectively engageable to interconnect the ring gear of the fourth
planetary gear set with the stationary element. The torque transmitting
5

mechanisms are selectively engageable in combinations of at least three to
establish at least eight forward speed ratios and at least one reverse speed ratio
between the input member and the output member.
[0018] Further objects, aspects and advantages of the present
invention will become apparent by reference to the following description and
appended drawings wherein like reference numbers refer to the same
component, element or feature.
DRAWINGS
[0019] The drawings described herein are for illustration purposes only
and are not intended to limit the scope of the present disclosure in any way.
[0020] FIG. 1 is a lever diagram of an embodiment of an eight speed
transmission according to the present invention;
[0021] FIG. 2 is a diagrammatic view of an embodiment of an eight
speed transmission according to the present invention; and
[0022] FIG. 3 is a truth table presenting the state of engagement of the
various torque transmitting elements in each of the available forward and reverse
speeds or gear ratios of the transmission illustrated in FIGS. 1 and 2.
DETAILED DESCRIPTION
[0023] The following description is merely exemplary in nature and is
not intended to limit the present disclosure, application, or uses.
6

[0024] At the outset, it should be appreciated that the eight speed
automatic transmission of the present invention has an arrangement of
permanent mechanical connections between the elements of the four planetary
gear sets in common. These mechanical connections generically link or relate
the transmission embodiments. A first component or element of a first planetary
gear set is permanently coupled to a first component or element of a second
planetary gear set. A second component or element of the first planetary gear
set is permanently coupled to a first component or element of a third planetary
gear set. A second component or element of the second planetary gear set is
permanently coupled to a first component or element of a fourth planetary gear
set. Finally, a second component or element of the third planetary gear set is
permanently coupled to a second component or element of the fourth planetary
gear set.
[0025] Referring now to FIG. 1, an embodiment of an eight speed
transmission 10 is illustrated in a lever diagram format. A lever diagram is a
schematic representation of the components of a mechanical device such as an
automatic transmission. Each individual lever represents a planetary gear set
wherein the three basic mechanical components of the planetary gear are each
represented by a node. Therefore, a single lever contains three nodes: one for
the sun gear, one for the planet gear carrier, and one for the ring gear. The
relative length between the nodes of each lever can be used to represent the
ring-to-sun ratio of each respective gear set. These lever ratios, in turn, are used
to vary the gear ratios of the transmission in order to achieve an appropriate
7

ratios and ratio progression. Mechanical couplings or interconnections between
the nodes of the various planetary gear sets are illustrated by thin, horizontal
lines and torque transmitting devices such as clutches and brakes are presented
as interleaved fingers. If the device is a brake, one set of the fingers is
grounded. Further explanation of the format, purpose and use of lever diagrams
can be found in SAE Paper 810102, "The Lever Analogy: A New Tool in
Transmission Analysis" by Benford and Leising which is hereby fully incorporated
by reference.
. [0026] The transmission 10 includes an input shaft or member 12, a
first planetary gear set 14 having three nodes: a first node 14A, a second node
14B and a third node 14C, a second planetary gear set 16 having three nodes: a
first node 16A, a second node 16B and a third node 16C, a third planetary gear
set 18 having three nodes: a first node 18A, a second node 18B and a third node
18C, a fourth planetary gear set 20 having three nodes: a first node 20A, a
second node 20B and a third node 20C and an output shaft or member 22.
[0027] The input 12 is coupled to the second node 14B of the first
planetary gear set 14. The output 22 is coupled to the second node 18B of the
third planetary gear set 18. The first node 14A of the first planetary gear set 14 is
coupled to the third node 20C of the fourth planetary gear set 20. The third node
14C of the first planetary gear set 14 is coupled to the third node 16C of the
second planetary gear set 16. The first node 16A of the second planetary gear
set 16 is coupled to the third node 18C of the third planetary gear set 18. The
8

first node 18A of the third planetary gear set 18 is coupled to the second node
20B of the fourth planetary gear set 20.
[0028] A first clutch 26 selectively connects the second node 14B of
the first planetary gear set 14 to the first node 16A of the second planetary gear
set 16. A second clutch 28 selectively connects the first node 16A of the second
planetary gear set 16 to the third node 14C of the first planetary gear set 14 and
to the third node 16C of the second planetary gear set 16. A third clutch 30
selectively connects the second node 16B of the second planetary gear set 16 to
the first node 18A of the third planetary gear set 18 and to the second node 20B
of the fourth planetary gear set 20. A first brake 32 selectively connects the first
node 20A of the fourth planetary gear set 20 to a ground, stationary element, or a
transmission housing 40. A second brake 34 selectively connects the third node
20C of the fourth planetary gear set 20 to a ground, stationary element, or the
transmission housing 40.
[0029] Referring now to FIG. 2, a stick diagram presents a schematic
layout of the embodiment of the eight speed transmission 10 according to the
present invention. In FIG. 2, the numbering from the lever diagram of FIG. 1 is
carried over. The clutches, brakes and couplings are correspondingly presented
whereas the nodes of the planetary gear sets now appear as components of
planetary gear sets such as sun gears, ring gears, planet gears and planet gear
carriers.
[0030] For example, the first planetary gear set 14 includes a sun gear
member 14A, a planet gear carrier member 14B that rotatably supports a set of
9

planet gears 14D, and a ring gear member 14C. The planet gears 14D are each
configured to intermesh with both the sun gear member 14A and the ring gear
member 14C. The sun gear member 14A is connected for common rotation with
a first shaft or interconnecting member 42. The planet gear carrier member 14B
is connected for common rotation with the input member 12. The ring gear
member 14C is connected for common rotation with a second shaft or
interconnecting member 44.
[0031] The second planetary gear set 16 includes a sun gear member
16A, a planet carrier member 16C that rotatably supports a set of intermeshing
planet gears 16D and 16E, and a ring gear member 16B. The planet gears 16D
and 16E are configured to intermesh with one another and with the sun gear
member 16A and the ring gear member 16B. The sun gear member 16A is
connected for common rotation with a third shaft or interconnecting member 46
and with a fourth shaft or interconnecting member 48. The planet carrier
member 16C is connected for common rotation with the second interconnecting
member 44. The ring gear member 16B is connected for common rotation with a
fifth shaft or interconnecting member 50.
[0032] The third planetary gear set 18 includes a sun gear member
18C, a planet carrier member 18B that rotatably supports a set of planet gears
18D, and a ring gear member 18A. The planet gears 18D are each configured to
intermesh with both the sun gear member 18C and the ring gear member 18A.
The sun gear member 18C is connected for common rotation with the fourth
interconnecting member 48. The planet carrier member 18B is connected for
10

common rotation with the output member 22. The ring gear member 18A is
connected for common rotation with a sixth shaft or interconnecting member 52.
[0033] The fourth planetary gear set 20 includes a sun gear member
20C, a planet carrier member 20B that rotatably supports a set of planet gears
20D, and a ring gear member 20A. The planet gears 20D are each configured to
intermesh with both the sun gear member 20C and the ring gear member 20A.
The sun gear member 20C is connected for common rotation with a seventh
shaft or interconnecting member 54 and with the first interconnecting member 42.
The planet carrier member 20B is connected for common rotation with the sixth
interconnecting member 52. The ring gear member 20A is connected for
common rotation with an eighth shaft or interconnecting member 56.
[0034] The input shaft or member 12 is preferably continuously
connected to an engine (not shown) or to a turbine of a torque converter (not
shown). The output shaft or member 22 is preferably continuously connected
with a final drive unit or transfer case (not shown).
[0035] The torque-transmitting mechanisms or clutches 26, 28, 30 and
the brakes 32, 34 allow for selective interconnection of the shafts or
interconnecting members, members of the planetary gear sets and the
transmission housing 40. For example, the first clutch 26 is selectively
engageable to connect the input member 12 to the third interconnecting member
46. The second clutch 28 is selectively engageable to connect the second
interconnecting member 44 to the third interconnecting member 46. The third
clutch 30 is selectively engageable to connect the fifth interconnecting member
11

50 to the sixth interconnecting member 52. The first brake 32 is selectively
engageable to connect the eighth interconnecting member 56 to ground or the
transmission housing 40 in order to restrict rotation of the ring gear 20A relative
to the ground or the transmission housing 40. The second brake 34 is selectively
engageable to connect the seventh interconnecting member 54 to the ground or
the transmission housing 40 to restrict rotation of the sun gear 20C and the sun
gear 14A relative to the ground or the transmission housing 40.
[0036] Referring now to FIGS. 2 and 3, the operation of the
embodiment of the eight speed transmission 10 will be described. It will be
appreciated that the transmission 10 is capable of transmitting torque from the
input shaft or member 12 to the output shaft or member 22 in at least eight
forward speed or torque ratios and at least one reverse speed or torque ratio.
Each forward and reverse speed or torque ratio is attained by engagement of
one or more of the torque-transmitting mechanisms (i.e. first clutch 26, second
clutch 28, third clutch 30, first brake 32, and second brake 34), as will be
explained below. FIG. 3 is a truth table presenting the various combinations of
torque-transmitting mechanisms or elements that are activated or engaged to
achieve the various gear states. Actual numerical gear ratios and gear steps of
the various gear states are also presented although it should be appreciated that
these numerical values are exemplary only and that they may be adjusted over
significant ranges to accommodate various applications and operational criteria
of the transmission 10. An example of the gear ratios that may be obtained using
the embodiments of the present invention are also shown in FIG. 3. Of course,
12

other gear ratios are achievable depending on the gear diameter, gear teeth
count and gear configuration selected.
[0037] To establish reverse gear, the first brake 32, the second brake
34, and the third clutch 30 are engaged or activated. The first brake 32 connects
the eighth interconnecting member 56 to ground or the transmission housing 40
in order to restrict rotation of the ring gear 20A relative to the ground or the
transmission housing 40. The second brake 34 connects the seventh
interconnecting member 54 to the ground or the transmission housing 40 to
restrict rotation of the sun gear 20C and the sun gear 14A relative to the ground
or the transmission housing 40. The third clutch 30 connects the fifth
interconnecting member 50 to the sixth interconnecting member 52. Likewise,
the eight forward ratios are achieved through different combinations of clutch and
brake engagement, as shown in FIG. 3.
[0038] It will be appreciated that the foregoing explanation of operation
and gear states of the eight speed transmission 10 assumes, first of all, that all
the clutches and the brakes not specifically referenced in a given gear state are
inactive or disengaged and, second of all, that during gear shifts, i.e., changes of
gear state, between at least adjacent gear states, a clutch or brake engaged or
activated in both gear states will remain engaged or activated.
[0039] The description of the invention is merely exemplary in nature
and variations that do not depart from the gist of the invention are intended to be
within the scope of the invention. Such variations are not to be regarded as a
departure from the spirit and scope of the invention.
13

CLAIMS
1. A transmission comprising:
an input member;
an output member;
first, second, third and fourth planetary gear sets each having first,
second and third members;
a first interconnecting member continuously interconnecting the first
member of the first planetary gear set with the first member of the fourth
planetary gear set;
a second interconnecting member continuously interconnecting the
third member of the first planetary gear set with the second member of the
second planetary gear set;
a third interconnecting member continuously interconnecting the
first member of the second planetary gear set with the first member of the third
planetary gear set;
a fourth interconnecting member continuously interconnecting the
third member of the third planetary gear set with the second member of the fourth
planetary gear set; and
five torque transmitting mechanisms selectively engageable to
interconnect one of the first, second, and third members with another of the first,
second, third members, and a stationary element, and
wherein the torque transmitting mechanisms are selectively
engageable in combinations of at least three to establish at least eight forward
14

speed ratios and at least one reverse speed ratio between the input member and
the output member.
2. The transmission of claim 1 wherein a first of the five torque
transmitting mechanisms is selectively engageable to interconnect the second
member of the first planetary gear set with at least one of the first member of the
second planetary gear set and the first member of the third planetary gear set.
3. The transmission of claim 2 wherein a second of the five torque
transmitting mechanisms is selectively engageable to interconnect the third
member of the first planetary gear set with at least one of the first member of the
second planetary gear set and the first member of the third planetary gear set.
4. The transmission of claim 3 wherein a third of the five torque
transmitting mechanisms is selectively engageable to interconnect the third
member of the second planetary gear set with at least one of the second member
of the fourth planetary gear set and the third member of the third planetary gear
set.
5. The transmission of claim 4 wherein a fourth of the five torque
transmitting mechanisms is selectively engageable to interconnect the first
member of the fourth planetary gear set with the stationary element.
15

6. The transmission of claim 5 wherein a fifth of the five torque
transmitting mechanisms is selectively engageable to interconnect the third
member of the fourth planetary gear set with the stationary element.
7. The transmission of claim 1 wherein the first members are sun
gears, the second members are carrier members, and the third members are ring
gears.
8. The transmission of claim 1 wherein the input member is
continuously interconnected with the second member of the first planetary gear
set and wherein the output member is continuously interconnected with the
second member of the third planetary gear set.
9. The transmission of claim 1 wherein two of the torque transmitting
mechanisms are brakes and three of the torque transmitting mechanisms are
clutches.
10. The transmission of claim. 1 wherein the stationary element is a
transmission housing.
16

11. A transmission comprising:
an input member;
an output member;
first, second, third and fourth planetary gear sets each having first,
second and third members, wherein the input member is continuously
interconnected with the second member of the first planetary gear set and the
output member is continuously interconnected with the second member of the
third planetary gear set;
a first interconnecting member continuously interconnecting the first
member Of the first planetary gear set with the first member of the fourth
planetary gear set;
a second interconnecting member continuously interconnecting the
third member of the first planetary gear set with the second member of the
second planetary gear set;
a third interconnecting member continuously interconnecting the
first member of the second planetary gear set with the first member of the third
planetary gear set;
a fourth interconnecting member continuously interconnecting the
third member of the third planetary gear set with the second member of the fourth
planetary gear set;
a first torque transmitting mechanism selectively engageable to
interconnect the second member of the first planetary gear set with at least one
17

of the first member of the second planetary gear set and the first member of the
third planetary gear set;
a second torque transmitting mechanism selectively engageable to
interconnect the third member of the first planetary gear set with at least one of
the first member of the second planetary gear set and the first member of the
third planetary gear set;
a third torque transmitting mechanism selectively engageable to
interconnect the third member of the second planetary gear set with at least one
of the second member of the fourth planetary gear set and the third member of
the third planetary gear set;
a fourth torque transmitting mechanism selectively engageable to
interconnect the first member of the fourth planetary gear set with a stationary
element; and
a fifth torque transmitting mechanism selectively engageable to
interconnect the third member of the fourth planetary gear set with the stationary
element, and
wherein the torque transmitting mechanisms are selectively
engageable in combinations of at least three to establish at least eight forward
speed ratios and at least one reverse speed ratio between the input member and
the output member.
18

12. The transmission of claim 11 wherein the first members are sun
gears, the second members are carrier members, and the third members are ring
gears.
13. The transmission of claim 12 wherein the stationary element is a
transmission housing.
19

14. A transmission comprising:
an input member;
an output member;
first, second, third and fourth planetary gear sets each having a sun
gear, a planet carrier member and a ring gear, wherein the input member is
continuously interconnected with the planet carrier member of the first planetary
gear set and the output member is continuously interconnected with the planet
carrier member of the third planetary gear set;
a first interconnecting member continuously interconnecting the sun
gear of the first planetary gear set with the sun gear of the fourth planetary gear
set;
a second interconnecting member continuously interconnecting the
ring gear of the first planetary gear set with the planet carrier member of the
second planetary gear set;
a third interconnecting member continuously interconnecting the
sun gear of the second planetary gear set with the sun gear of the third planetary
gear set;
a fourth interconnecting member continuously interconnecting the
ring gear of the third planetary gear set with the planet carrier member of the
fourth planetary gear set;
a first torque transmitting mechanism selectively engageable to
interconnect the planet carrier member of the first planetary gear set with at least
20

one of the sun gear of the second planetary gear set and the sun gear of the third
planetary gear set;
a second torque transmitting mechanism selectively engageable to
interconnect the ring gear of the first planetary gear set with at least one of the
sun gear of the second planetary gear set and the sun gear of the third planetary
gear set;
a third torque transmitting mechanism selectively engageable to
interconnect the ring gear of the second planetary gear set with at least one of
the planet carrier member of the fourth planetary gear set and the ring gear of the
third planetary gear set;
a fourth torque transmitting mechanism selectively engageable to
interconnect the sun gear of the fourth planetary gear set with a stationary
element; and
a fifth torque transmitting mechanism selectively engageable to
interconnect the ring gear of the fourth planetary gear set with the stationary
element, and
wherein the torque transmitting mechanisms are selectively
engageable in combinations of at least three to establish at least eight forward
speed ratios and at least one reverse speed ratio between the input member and
the output member.
15. The transmission of claim 14 wherein the stationary element
is a transmission housing.


21

A transmission is provided having an input member, an output member, four
planetary gear sets, a plurality of coupling members and a plurality of torque
transmitting devices. Each of the planetary gear sets includes first, second and
third members. The torque transmitting devices may include clutches and
brakes.

Documents:

01740-kol-2007-abstract.pdf

01740-kol-2007-claims.pdf

01740-kol-2007-correspondence others.pdf

01740-kol-2007-description complete.pdf

01740-kol-2007-drawings.pdf

01740-kol-2007-form 1.pdf

01740-kol-2007-form 2.pdf

01740-kol-2007-form 3.pdf

01740-kol-2007-form 5.pdf

1740-KOL-2007-(11-11-2011)-ABSTRACT.pdf

1740-KOL-2007-(11-11-2011)-AMANDED CLAIMS.pdf

1740-KOL-2007-(11-11-2011)-DESCRIPTION (COMPLETE).pdf

1740-KOL-2007-(11-11-2011)-DRAWINGS.pdf

1740-KOL-2007-(11-11-2011)-EXAMINATION REPORT REPLY RECIEVED.pdf

1740-KOL-2007-(11-11-2011)-FORM 1.pdf

1740-KOL-2007-(11-11-2011)-FORM 2.pdf

1740-KOL-2007-(11-11-2011)-FORM 3.pdf

1740-KOL-2007-(11-11-2011)-FORM 5.pdf

1740-KOL-2007-(11-11-2011)-OTHERS.pdf

1740-KOL-2007-(11-11-2011)-PA.pdf

1740-KOL-2007-(11-11-2011)-PETITION UNDER RULE 137.pdf

1740-KOL-2007-(19-03-2012)-AMANDED CLAIMS.pdf

1740-KOL-2007-(19-03-2012)-CORRESPONDENCE.pdf

1740-KOL-2007-(19-03-2012)-FORM-13.pdf

1740-KOL-2007-ASSIGNMENT-1.1.pdf

1740-KOL-2007-ASSIGNMENT.pdf

1740-KOL-2007-CORRESPONDENCE OTHERS 1.1.pdf

1740-KOL-2007-CORRESPONDENCE OTHERS 1.2.pdf

1740-KOL-2007-CORRESPONDENCE-1.3.pdf

1740-KOL-2007-EXAMINATION REPORT.pdf

1740-KOL-2007-FORM 18-1.1.pdf

1740-kol-2007-form 18.pdf

1740-KOL-2007-FORM 3.pdf

1740-KOL-2007-GPA.pdf

1740-KOL-2007-GRANTED-ABSTRACT.pdf

1740-KOL-2007-GRANTED-CLAIMS.pdf

1740-KOL-2007-GRANTED-DESCRIPTION (COMPLETE).pdf

1740-KOL-2007-GRANTED-DRAWINGS.pdf

1740-KOL-2007-GRANTED-FORM 1.pdf

1740-KOL-2007-GRANTED-FORM 2.pdf

1740-KOL-2007-GRANTED-LETTER PATENT.pdf

1740-KOL-2007-GRANTED-SPECIFICATION.pdf

1740-KOL-2007-OTHERS-1.1.pdf

1740-KOL-2007-OTHERS.pdf

1740-KOL-2007-PRIORITY DOCUMENT.pdf

1740-KOL-2007-REPLY TO EXAMINATION REPORT.pdf

1740-KOL-2007-TRANSLATED COPY OF PRIORITY DOCUMENT.pdf

abstract-01740-kol-2007.jpg


Patent Number 253715
Indian Patent Application Number 1740/KOL/2007
PG Journal Number 33/2012
Publication Date 17-Aug-2012
Grant Date 14-Aug-2012
Date of Filing 27-Dec-2007
Name of Patentee GM GLOBAL TECHNOLOGY OPERATIONS, INC.
Applicant Address 300 GM RENAISSANCE CENTER DETROIT, MICHIGAN
Inventors:
# Inventor's Name Inventor's Address
1 SCOTT H. WITTKOPP YPSILANTI, MICHIGAN 6189 OAKHURST DRIVE YPSILANTI, MICHIGAN 48197
2 JAMES M. HART BELLEVILLE, MI 16011 HAGGERTY BELLEVILLE, MICHIGAN 48111
3 CLINTON E. CAREY MONROE, MICHIGAN 215 RIVERVIEW AVENUE MONROE, MICHIGAN 48162
4 MADHUSUDAN RAGHAVAN WEST BLOOMFIELD, MICHIGAN 6816 TRAIL VIEW COURT WEST BLOOMFIELD, MICHIGAN 48322
5 ANDREW W. PHILLIPS SALINE, MICHIGAN 1052 CUTLER CIRCLE SALINE, MICHIGAN 48176
PCT International Classification Number F16H3/66
PCT International Application Number N/A
PCT International Filing date
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 60/879,956 2007-01-11 U.S.A.