Title of Invention

APPARATUS FOR A QUICK RELEASE MECHANISM IN A RAILCAR HAND BRAKE

Abstract An apparatus for a quick release mechanism in a railcar hand brake having a housing, said housing having a front casing with an inside wall of a predetermined size and shape, a back plate, an operating shaft rotatably mounted in said housing, said operating shaft having a first end and a second end and a ratchet wheel rotatable - with said operating shaft intermediate said first and second ends thereof, and a release shaft with attached release lever rotatably mounted in said housing; said apparatus comprising: a. a projection of a predetermined size and shape disposed perpendicular to said ratchet wheel; b. a flexible clamp of a predetermined size and shape mounted inside said housing; " c. a member disposed perpendicular to and about the circumference of said release shaft; d. a first element disposed on said member wherein said first element interposes with said flexible clamp when said release shaft is rotated to achieve and maintain full brake release; and e. a second element disposed on said member and engageable with said projection when said operating shaft is rotated to disengage said first element from said flexible-clamp to allow for brake application.
Full Text FORM 2
THE PATENTS ACT 1970
[39 OF 1970]
COMPLETE SPECIFICATION
[See Section 10]
"APPARATUS FOR A QUICK RELEASE MECHANISM IN A RAILCAR HAND BRAKE"
WESTINGHOUSE AIR BRAKE TECHNOLOGIES CORPORATION, of 1001 Air Brake Avenue, Wilmerding, Pennsylvania 15148, United States of America
15-4-2005
The following specification particularly describes the nature of the invention and the manner in which it is to be performed:-


CROSS-REFERENCE TO RELATED APPLICATION The invention taught in the present application is closely-related to the invention taught in co-pending patent application titled "Quick Release Mechanism For A Railcar Hand Brake", filed
concurrently herewith and having serial number ' . This
application is assigned to the assignee of the present application. The teachings of this co-pending patent application are incorporated herein by reference thereto.
FIELD OF' THE INVENTION The present invention relates, in general, to a railcar hand brake, and more particularly, to an apparatus for a quick release mechanism in a railcar vertical wheel hand brake. The present invention will maintain a hand brake in the released position until an application is made.
BACKGROUND OF THE INVENTION
t
Prior to the present invention, a. railcar vertical hand brake includes a brake release mechanism that provides quick release,, of the brakes by disengaging the winding gear _. to permit free rotation of the main gear wheel. A force is exerted on the release lever to move the attached brake release shaft, whereby-releasing the main gear wheel and the tension on the brake chain, which in turn releases the brake. When the force on the

release lever is removed, the main gear wheel re-engages.
However, the brake may not be fully released. When a railcar
negotiates a curve in the track, the truck rotates and can exert
a force on the brake chain. The chain resists the truck
movement and tends to pull on the hand brake lever. This action
can apply the brakes to the truck while the train is in motion. Friction and wear between the brake shoes and the wheels, and the wheels and the rail may occur as a result.
An example of this type hand brake is taught in U.S. Patent No. 3,668,944, and the Universal 7400 Model Hand Brake. The teachings of these references are incorporated herein by reference thereto.
SUMMARY OF THE INVENTION
In a first aspect, the present invention provides an apparatus for a quick release mechanism in a railcar hand brake having a housing. The housing has a front casing with an inside wall of a predetermined size and shape, a back plate, and an operating shaft rotatably mounted in the housing, including a first end, a second end, and a ratchet wheel rotatable with the operating shaft intermediate of the first and second ends. A release shaft is rotatably mounted in the housing. The quick release mechanism comprises a projection of a predetermined size and 'shape disposed substantially perpendicular to the ratchet wheel, and a flexible clamp of a predetermined size and shape

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mounted inside the housing. A member is disposed substantially perpendicular to and about the circumference of the release shaft. A first element is disposed on such member wherein the first element interposes with the flexible clamp when the quick release shaft is rotated to achieve and maintain full brake release, and a second element is disposed on such member and engageable with the projection disposed on the ratchet wheel when the operating shaft is rotated to disengage the first element from the flexible clamp to allow for brake application.
In a further aspect, the present invention provides for a combination with a railcar hand brake having a brake chain, brake drum, gear mechanism, ratchet device further including a ratchet wheel, clutch device, quick release mechanism, and a housing adapted for mounting on a railcar. The improvement comprises a projection of a predetermined size and shape disposed substantially perpendicular to the ratchet wheel, and a flexible clamp of a predetermined size and shape mounted inside the housing. A member is disposed perpendicular to and about the circumference of the release shaft, with a first element disposed on said member wherein the first element interposes with the flexible clamp when the. release shaft is rotated to achieve and maintain full brake release, and a second element disposed on said member and engageable with the projection when
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the operating shaft is rotated to disengage the first element from the flexible clamp to allow for. brake application.
In a further aspect, the present invention provides an apparatus for a quick release mechanism in a railcar hand brake having a housing. The quick release mechanism comprises a release shaft of a predetermined size and shape rotatably mounted ■ in the housing." The release shaft has a first end, and the first end includes a cavity of a predetermined size and shape. A release lever has a hub with an inside diameter which
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is journaled on the first end of the release shaft. A stop of; a predetermined size and shape is disposed on the inside diameter of the hub of the release lever, and is engageable with the cavity of the release shaft to rotate the release shaft and cause free quick release of the brake.
In still a further aspect, the present invention provides for a combination with a railcar hand brake having a brake chain, brake drum, gear mechanism, ratchet device further including a ratchet wheel, clutch device, quick release mechanism, and a housing adapted for mounting on a railcar. The improvement comprises a release shaft of a predetermined size and shape rotatably mounted in the housing. The release shaft has a first end, the first end including a cavity of a predetermined size and shape. A release lever has a hub with an inside diameter which is journaled on the first end of the
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release shaft. A stop of a predetermined size and shape is
disposed on the inside diameter of the hub of the release lever,
and is engageable with the cavity of the release shaft to rotate
the .release shaft and cause free quick release of the brake.
, OBJECTS OF THE INVENTION
It is therefore a primary object of the present invention to provide an apparatus for maintaining a railcar hand brake quick release mechanism- in the full release position until brake application is made.
Another object of the present invention is to increase railcar wheel life by reducing the premature wear between the railcar brakes and the wheels as a result of friction between the brakes and the wheels due to unintentional brake application during train operation.
Still a further object of the present invention is to increase railway track life by reducing the friction between the wheels and the track as a result of restriction of rolling movement of the wheels on the track due to unintentional brake application during train operation.
Still a further object of the present invention is to minimize the potential for the quick release handle to remain extended into the path of the railcar ladder by allowing the release lever to freely return to the original position while maintaining full brake release.
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In addition to the various objects of the invention that have been described above, various other objects and advantages of the invention will, become more readily apparent to those persons skilled in the relevant art from the following more detailed description of the invention, particularly, when such description is taken in conjunction with the attached drawing figures and the appended claims.
Accordingly, the present invention relates to an apparatus for a quick release mechanism in a railcar hand brake having a housing, said housing having a front casing with an inside wall of a predetermined size and shape, a Back plate, an operating shaft rotatably mounted in said housing, said operating shaft having a first end and a second end and a ratchet wheel rotatable with said operating shaft intermediate said first and second ends thereof, and a release shaft with attached release lever rotatably mounted in said housing; said apparatus comprising:
a. a projection of a predetermined size and shape disposed
perpendicular to said ratchet wheel;
b. a flexible clamp of a predetermined size and shape mounted
inside said housing;
c. a member disposed perpendicular to and about the
circumference of said release shaft;
d. a first element disposed on said member wherein said first
element interposes with said flexible clamp when said release shaft is
rotated to achieve and maintain full brake release; and
e. a second element disposed on said member and engageable with
said projection when said operating shaft is rotated to disengage said first
element from said flexible-clamp to allow for brake application.

BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
Figure 1 is a side sectional view of a railcar vertical hand brake of the present invention;
Figure 2 is a front sectional view taken along the lines II-II of Figure 1;
Figure 3 is a front elevational view of a railcar"' vertical hand brake of the present invention; and
Figure 4 . is a detailed view of a section taken from the
front elevational view of Figure 3.
BRIEF DESCRIPTION OF A PRESENTLY
PREFERRED AND VARIOUS ALTERNATIVE
EMBODIMENTS OF*-THE PRESENT INVENTION
Prior to preceding to a more detailed description of the invention, it should be noted that identical components having identical functions have been designated with identical reference
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Now refer more particularly to Figs. 1 2, and 3 of the drawings. Illustrated therein is an apparatus for a quick release mechanism in a railcar hand brake. The railcar hand brake, generally designated 10, has a housing, generally designated 11. The housing comprises a front casing 14 including an inside wall 12 of a predetermined size and shape, and a back plate 13. An operating shaft, generally designated 20 is rotatably mounted in the housing 11. The operating shaft 20 includes a first end 21 and a second end 22. A ratchet wheel 23 is rotatable with the operating shaft 20 and intermediate the first end 21 and second end 22. A release shaft 40 is rotatably mounted in the housing 11.
The apparatus comprises a projection 24 of a predetermined size and shape disposed substantially perpendicular to the ratchet wheel 23. Preferably, the projection 24 is a pin of a predetermined length and diameter. A flexible clamp 30 of a predetermined size and shape is mounted inside the housing 11. Preferably, the flexible clamp 30 is a clevis shaped spring clip that is mounted on the inside wall 12 of the front casing 14. A member 41 is disposed substantially perpendicular to, and about the circumference of the release shaft 40. A first element 42 is disposed on the member 41. When full brake release is desired throughout train movement, the release shaft 40 is rotated. The first element 42 interposes with the flexible
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clamp 30, whereby the flexible clamp 30 secures the first element 42. A second element 43 is disposed on the member 41. When brake application is desired, the operating shaft 20 is rotated in such a direction to move the projection 24 on the ratchet wheel 23 into engagement with the second element 43, causing the release shaft 40 to rotate, which disengages the first element 42 from 'the flexible clamp 30. Preferably, the first element 42 is a lobe shaped protrusion of a predetermined size, and the second element 43 is a tapered protrusion of a predetermined size.
Now refer more particularly to Figures 1, 2, and 3 of the drawings. The improvement is shown in combination with a railcar hand brake 1 having a brake chain 50, brake drum 60, gear mechanism 70, ratchet device, generally designated 80 including a ratchet wheel 23, a clutch device 90, a quick release mechanism generally designated 100, and a housing 11 adapted for mounting on a railway car. The improvement comprises a projection 24 of a predetermined size and shape disposed substantially perpendicular to the ratchet wheel 23. Preferably, the projection 24 is a pin of a predetermined length and diameter. The combination further includes a flexible clamp 30 of a predetermined size and shape mounted inside said housing. Preferably, the flexible clamp 30 is a clevis shaped spring clip, and is mounted on the inside wall 12 of the front
&
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casing 14. A member 41 is disposed substantially perpendicular to, and about the circumference of the release shaft 40. A first element 42 is disposed on the member 41. When full brake release is desired for train movement, the release shaft 40 is rotated. The first element 42 interposes with the flexible clamp 30, whereby the flexible clamp 30 secures the first element 42. A second element 43 is disposed on the member 41. The first element 42 interposes with the flexible clamp 30, whereby the flexible clamp 30 secures the first element 42. A second element 43 is also disposed on the member 41. When brake application is desired, the operating shaft 20 is rotated in such a direction to move the projection 24 on the ratchet
wheel 23 into engagement with the second element 43, rotating the release shaft 40, which disengages the first element 42 from the flexible clamp 30 to allow for brake application.
Preferably, the first element 42 is a lobe shaped protrusion of a predetermined size, and the second element 43 is a tapered protrusion of a predetermined size.
Now refer more particularly to Figs. 1, 3, and 4 of the drawings. Illustrated herein is an apparatus for a quick release mechanism in a railcar hand brake. The railcar handbrake, generally designated 10, has a housing, generally designated 11. The apparatus comprises a release shaft 40 of a
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predetermined size and shape rotatably mounted in the housing 11. The release shaft 40 has a .first end 44. Preferably, the shape of the first, end 44 of" the release shaft 40 is substantially cylindrical. The first end 44 includes a cavity 45 of a predetermined size and shape. Preferably, the cavity 45 is a notch disposed on the circumference of and longitudinally along the axis of the release shaft 40, having a first surface 15 and a second surface 16. A release lever 17 having a hub 18 with an inside diameter 19 is journaled on the first end 44 of the release shaft 40. A stop 25 of a predetermined size and shape is disposed on the inside diameter 19 of the hub 18 of the release lever 17. The stop 25 is engageable with the cavity 45 of the release shaft 40 to rotate the release shaft 40 and cause free quick release of the brake. Preferably, the stop engages with the first surface 15 of the cavity 45 when the release lever 17 is moved to activate the quick brake release mechanism. After full brake release is completed, the cavity 45 allows the release lever 17 to return to the lower position of Figure 1,
independent of the release shaft 40, which remains in the full
i
brake release position. Now refer more particularly to Figs. 1,2,3, and 4 of the drawings. The improvement is shown in combination with a
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railcar hand brake 1 having a brake chain 50, brake drum 60, gear mechanism 70, ratchet device, generally designated 80 including a ratchet wheel 23, a clutch device 90, a quick release mechanism generally designated 100, and a housing 11 adapted for mounting on a railway car. The improvement comprises a release shaft 40 of a predetermined size and shape rotatably mounted in the housing 11. The release shaft 40 has a first end 44. Preferably, the shape of the first end 44 of the release shaft 40 is substantially cylindrical. The first end 44 includes a cavity 45 of a predetermined size and shape. Preferably, the cavity 45 is a notch disposed on the circumference of and longitudinally along the axis of the release shaft 40, having a first surface 15 and a second surface 16. A release lever 17 having a hub 18 with an inside diameter 19 is journaled on the first end 44 of the release shaft 40. A stop 25 of a predetermined size and shape is disposed on the inside diameter 19 of the hub 18 of the release lever 17. Preferably, the stop engages with the first surface 15 of the cavity 45 when the release lever 17 is moved to activate the quick brake release mechanism. After full brake release is completed, the cavity 45 allows the release lever 17 to return to the lower position of Figure 1, independent of the release shaft 40, which remains in the full brake release position.
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Although the invention has been shown in connection with a certain specific embodiment, it will be readily apparent to those skilled in the art that various changes in form and arrangement of parts and method may be made to suit requirements without departing from the spirit and scope of the invention.
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WE CLAIM:
1. An apparatus for a quick release mechanism in a railcar hand brake having a housing, said housing having a front casing with an inside wall of a predetermined size and shape, a back plate, an operating shaft rotatably mounted in said housing, said operating shaft having a first end and a second end and a ratchet wheel rotatable - with said operating shaft intermediate said first and second ends thereof, and a release shaft with attached release lever rotatably mounted in said housing; said apparatus comprising:
a. a projection of a predetermined size and shape disposed
perpendicular to said ratchet wheel;
b. a flexible clamp of a predetermined size and shape mounted
inside said housing;
" c. a member disposed perpendicular to and about the circumference of said release shaft;
d. a first element disposed on said member wherein said first
element interposes with said flexible clamp when said release shaft is
rotated to achieve and maintain full brake release; and
e. a second element disposed on said member and engageable
with said projection when said operating shaft is rotated to disengage
said first element from said flexible-clamp to allow for brake application.
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2. The apparatus as claimed in claim 1, wherein said projection is a pin of a predetermined length and diameter.
3. The apparatus as claimed in claim 1, wherein said flexible clamp is mounted on said inside wall of said front casing.
4. The apparatus as claimed in claim 1, wherein said flexible clamp is a clevis shaped spring clip.
5. The apparatus as claimed in claim 1, wherein said first element is a lobe shaped protrusion of a predetermined size.
6. The apparatus as claimed in claim 1, wherein said second element is a tapered protrusion of a predetermined size.
7. An apparatus for a quick release mechanism as claimed in claim 1, wherein said release shaft having a predetermined size and shape rotatably mounted in said housing a first end, said first end having a cavity of a predetermined size and shape; said release lever having a hub with an inside diameter journaled on said first end of said release shaft and there being a stop of a predetermined size and shape disposed on said inside diameter of said hub of said release lever and engageable with said cavity of said release shaft to rotate said release shaft and cause free quick release of the brakes.
8. The apparatus as claimed in claim 7, wherein the shape of said first end of said release shaft is cylindrical.
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9. The apparatus as claimed in claim 7, wherein said cavity is a notch disposed on the circumference of and longitudinally along the axis of said release shaft, said notch having a first surface and a second surface.
10. The apparatus as claimed in claim 7, wherein said stop is engageable with said first surface of said cavity when said release lever is moved to activate said quick brake release mechanism.
11. An apparatus for a quick release mechanism in a railcar hand brake, substantially as herein described with reference to and as illustrated in the accompanying drawings.
Dated this 27th day of April, 2001
(JAYANTA PAL)
OF REMFW & SAGAR
ATTORNEY FOR THE APPLI CANTS

Documents:

402-mum-2001-cancelled pages(15-4-2005).pdf

402-mum-2001-claims(granted)-(15-11-2005).doc

402-mum-2001-claims(granted)-(15-11-2005).pdf

402-mum-2001-correspondence(6-1-2006).pdf

402-mum-2001-correspondence(ipo)-(22-11-2004).pdf

402-mum-2001-drawing(30-10-2001).pdf

402-mum-2001-form 1(15-6-2001).pdf

402-mum-2001-form 1(27-4-2001).pdf

402-mum-2001-form 19(18-3-2004).pdf

402-mum-2001-form 2(granted)-(15-11-2005).doc

402-mum-2001-form 2(granted)-(15-11-2005).pdf

402-mum-2001-form 3(15-4-2005).pdf

402-mum-2001-form 3(23-10-2001).pdf

402-mum-2001-form 3(27-4-2001).pdf

402-mum-2001-form 5(27-4-2001).pdf

402-mum-2001-petition under rule 137(15-4-2005).pdf

402-mum-2001-petition under rule 138(15-4-2005).pdf

402-mum-2001-power of authority(15-4-2005).pdf

402-mum-2001-power of authority(5-7-2001).pdf

abstract1.jpg


Patent Number 197792
Indian Patent Application Number 402/MUM/2001
PG Journal Number 42/2008
Publication Date 17-Oct-2008
Grant Date 06-Jan-2006
Date of Filing 27-Apr-2001
Name of Patentee WESTINGHOUSE AIR BRAKE TECHNOLOGIES CORPORATION
Applicant Address 1001 AIR BRAKE AVENUE, WILMERDING, PENNSYLVANIA 15148, UNITED STATES OF AMERICA.
Inventors:
# Inventor's Name Inventor's Address
1 ANGELO M. LABRIOLA 12158 MAPLE AVENUE, BLUE ISLAND, ILLINOIS 60406, USA.
2 EVERETT G. RING 4551 WHITCOMB STREET, GARY, INDIANA 46408, USA.
PCT International Classification Number N/A
PCT International Application Number N/A
PCT International Filing date
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 09/664,212 2000-09-18 U.S.A.