Title of Invention

INLINE MANIFOLD FOR PUSH-TO-CONNECT FITTINGS FOR A MOTOR VEHICLE AIR BRAKE SYSTEM

Abstract This invention relates to a moulded inline manifold for push-to-connect fittings for a motor vehicle air brake system. This device provides a robust, leak free connection between ports of various elements such as valves, actuators and reservoirs in the air brake system layout. The current invention for unthreaded ports improves upon the earlier invention for certain configuration of devices where the ports are oriented in one plane. The advantages of the new concept are easy assembly and simplified machining of ports. An additional feature of the moulded inline manifold comprising a step and chamfer aids in strengthening the retention of the push-to-connect fitting joint.
Full Text

This invention relates to a moulded inline manifold on air brake system devices of a motor vehicle, suitable for push-to-connect fittings. This device provides a robust, leak free connection between ports of various elements such as valves, actuators and reservoirs in the air brake system layout. The device is also intended to eliminate the need for threaded ports in the bodies of the devices.
The device known to the art especially in an earlier application filed by the inventors in respect of a push to connect device for use with air brake system devices of a motor vehicle with threaded ports. The current invention improves upon the earlier invention for certain configuration of devices where the ports are oriented in one plane. The advantages of the new concept are easy assembly and simplified machining of ports.
The inline manifold for push-to-connect fittings, according to this invention, comprises a first assembly consisting of a tube, an insert provided with a peripheral groove, said insert being accommodated in the tube: a second assembly comprising a unthreaded port member of the air brake system device, a resilient retainer member seated within the port member. The resilient retainer being held in position by the said inline manifold that is unthreaded, with an opening axially with every port member of the device ports in a single plane, which in turn is fastened to the devices using standard fasteners. The invention is such that, whenever the insert of the first assembly is pushed into the port member through the port of the inline manifold, the resilient snap lugs of the retainer engage with the said groove in a snap-fit to connect the two assemblies together. The port member and the inline manifold hold the

resilient retainer in position, in case of any axial pull of the tube, away from the
device.
The device proposed herein will now be described with reference to the
accompanying drawings, which illustrate by way of example, and not by way of
limitation, one of possible embodiments of this invention. In the drawing
Figure 1 illustrates an assembled view of the embodiment
Figure 2 illustrates the features of the inline manifold
Figure 3 illustrates the features of the resilient retainer
The embodiment will be seen to comprise a tube S and an insert H provided with a
peripheral groove V. The insert H is accommodated in the tube S. A sealing ring E
provided on the insert H prevents entry of dust into the valve ports through the
clearance between the insert H and the inline manifold G. This arrangement forms
the first assembly.
A resilient retainer member F is seated on a step K within the unthreaded port
member T and held in place therein by the moulded, unthreaded manifold device G,
thereby completing the groove for seating the sealing ring I. A small spigot M
provided in the manifold at each port J aligns the manifold axially with the mouth B of
the port member T. The holes O provided in the manifold G and any standard thread
D in the body of the air brake system device enable fastening of any standard screw
C, thereby securing the manifold G with the port member T.
The manifold G has a moulded taper profile A, whereby whenever the insert H of the
first assembly is pushed into the port J, the sealing ring E can easily slide into the
port of the manifold G. The resilient snap lugs Q of the retainer F open and snap on
with the tube insert H.

The port J of the manifold also restricts the axial movement of the first assembly into the second by interfering with the tube S. The step L with a chamfer N of angle a
provided in the port J of the manifold forces the retainer radially inwards, thereby
gripping the resilient snap lugs Q of the retainer F in position, with the tube insert H
in case of any axial pull of the tube away from the device.
The sealing ring I provided within the device port member B ensures air-tightness
between the port member T and the insert H.
To disconnect the first and the second assemblies from each other, the screws C are
unscrewed. The retainer member F has slit W that enables its removal and reuse.
This detaches the parts of the first assembly.
It will be seen from the foregoing description that the device proposed herein is easy
to assemble and dismantle.
The moulded port J of the manifold is a simplified configuration to suit air brake
system devices comprising of ports in one plane.
The moulded port J of the unthreaded manifold device G can be applied for any
appropriate tube sizes being used in the air brake system of a motor vehicle and to
eliminate any version of the standard port threads (for example, metric, NPTF, BSP,
etc.) of the devices.
From the foregoing description it will also be appreciated that various other
embodiments of the device proposed herein are possible without departing from the
scope and ambit of this invention.



We Claim:
1. An inline manifold for push to connect fittings for a motor vehicle air brake system being characterised by incorporation of moulded inline manifold and

the corresponding unthreaded port of the device to improve upon the existing system comprising a threaded nut and mating threaded port, to achieve easy assembly and simplified machining of ports.
An inline manifold for push to connect fittings for a motor vehicle air brake system comprising a first assembly consisting of a tube, and insert provided with a peripheral groove, said insert being accommodated in the tube; a second assembly comprising an unthreaded port member of the air brake system device; a resilient retainer member seated within the unthreaded port member and held in place therein by an axially aligned moulded, unthreaded inline manifold, which is secured to the threaded system device (comprising the unthreaded port member), using any standard screw or fastener, a sealing ring housed between the resilient retainer member and the port member ensures air tightness, the said inline manifold device having a moulded tapered profile at entry to enable easy entry of sealing ring on the tube insert, spigots to axially align its multiple ports at any position with that of the system device ports in one plane and a step with chamfer provided to hold the retainer in position in case of an axial pull of the tube away from the device.
An inline manifold for push to connect fittings for a motor vehicle air brake system claimed in any one of the preceding claims wherein the unthreaded moulded inline manifold is provided with a taper profile at its multiple ports for enabling easy assembly of tube insert.
A push-to-connect device as claimed in any one of the preceding claims wherein the unthreaded moulded inline manifold is provided with spigots to

axially align its multiple ports at any possible positions with the corresponding nnultiple port mennbers in one plane of the air brake system devices. A push-to-connect device as claimed in any one of the preceding claims wherein the moulded unthreaded inline manifold is provided with a step and a chamfer of angle a at each of its ports to radially force the retainer inwards, to
grip the resilient retainer with the tube insert, thereby keeping the tube insert
intact.
An inline manifold for push to connect fittings for a motor vehicle air brake
system claimed in claim 1 wherein insert is provided with a first sealing ring
for preventing dust entry in assembly with the port of the unthreaded moulded
inline manifold.
An inline manifold for push to connect fittings for a motor vehicle air brake
system as claimed in claim 1 or claim 2 wherein a second sealing ring is
provided in the unthreaded port member of the air brake system device,
below the retainer member for ensuring air-tightness between the insert and
the unthreaded port member.
An inline manifold for push to connect fittings for a motor vehicle air brake
system as claimed in any one of the preceding claims wherein the retainer
member is seated on a step within the unthreaded port member of the air
brake system device, thereby completing the groove for the second sealing
ring.
An inline manifold for push to connect fittings for a motor vehicle air brake
system as claimed in any one of the preceding claims wherein the retainer
member is held in position inside the unthreaded port member by securing the

unthreaded moulded inline manifold using standard fasteners, to the threads provided in the body of the air brake system device.
10. An inline manifold for push to connect fittings for a motor vehicle air brake
system as claimed in any one of the preceding claims wherein the retainer
member has resilient snap lugs.
11. An inline manifold for push to connect fittings for a motor vehicle air brake
system claimed in any one of the preceding Claims wherein the retainer
member is provided with a slit.


Documents:

879-che-2004 amended claims 19-07-2011.pdf

879-che-2004 amended pages of specification 19-07-2011.pdf

879-CHE-2004 CORRESPONDENCE OTHERS 15-07-2011.pdf

879-che-2004 correspondence others 19-07-2011.pdf

879-CHE-2004 CORRESPONDENCE OTHERS 22-07-2011.pdf

879-che-2004 form-1 19-07-2011.pdf

879-CHE-2004 AMENDED CLAIMS 15-02-2011.pdf

879-CHE-2004 AMENDED PAGES OF SPECIFICATION 15-02-2011.pdf

879-CHE-2004 EXAMINATION REPORT REPLY RECEIVED 15-02-2011.pdf

879-CHE-2004 FORM-6 17-04-2008.pdf

879-CHE-2004 CLAIMS GRANTED.pdf

879-CHE-2004 CORRESPONDENCE PO.pdf

879-CHE-2004 FORM-18.pdf

879-CHE-2004 POWER OF ATTORNEY.pdf

879-che-2004-abstract.pdf

879-che-2004-claims.pdf

879-che-2004-correspondnece-others.pdf

879-che-2004-description(complete).pdf

879-che-2004-drawings.pdf

879-che-2004-form 1.pdf


Patent Number 248743
Indian Patent Application Number 879/CHE/2004
PG Journal Number 33/2011
Publication Date 19-Aug-2011
Grant Date 17-Aug-2011
Date of Filing 01-Sep-2004
Name of Patentee WABCO-TVS (INDIA) LIMITED
Applicant Address 29, HADDOWS ROAD, CHENNAI-600 006, TAMILNADU, INDIA.
Inventors:
# Inventor's Name Inventor's Address
1 SUNDARAMAHALINGAM SELVAMANI SUNDARAM CLAYTON LIMITED, JAYALAKSHMI ESTATES, NO.8 HADDOWS ROAD, CHENNAI 600 006, TAMILNADU, INDIA
2 SADASSIVAM NITHYANANDAM SUNDARAM CLAYTON LIMITED, JAYALAKSHMI ESTATES, NO.8 HADDOWS ROAD, CHENNAI 600 006, TAMILNADU, INDIA
3 ARUMUGHAM GANESAMOORTHY SUNDARAM CLAYTON LIMITED, JAYALAKSHMI ESTATES, NO.8 HADDOWS ROAD, CHENNAI 600 006, TAMILNADU, INDIA
PCT International Classification Number B60T 17/00
PCT International Application Number N/A
PCT International Filing date
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 NA