F - Mech Eng,Light,Heat,Weapons – 16 – D
Patent
F - Mech Eng,Light,Heat,Weapons
16
D
188/135
F16D 55/40 (2006.01) B60T 17/22 (2006.01) F16D 59/02 (2006.01) F16D 65/14 (2006.01) F16D 55/00 (2006.01)
Patent
CA 1095437
Abstract of the Disclosure A disc brake service piston for heavy equipment and off-the-road vehicles has an annular configuration and is sealingly and reciprocably received in an annular cavity forming a pressure chamber. During brake disassembly requiring removal of the piston from the cavity, the piston must be disconnected from a series of piston retracting mechanisms. The arrangement permits the force of one piston retraction spring to be relieved at a time. A tool is used which has a thread at one end and a handle at the other end. The threaded end is inserted into a tapped hole at the end of a return spring guide pin which transmits the spring force of one retracting mechanism to the piston. The tool can then be moved to compress the guide pin spring so that the pin is moved a sufficient distance to expose a cross pin therein which provides the connection between the guide pin and the piston. The cross pins are removed, one by one, from all of the spring guide pins of all of the mechanisms. The only manual force required at any one time in such removal is that required to overcome the compression force of one piston return spring. After all of the pins are removed, the piston can then be easily pulled out of the annular pressure chamber cavity.
326634
Khuntia Natabara
Rader Charles W.
General Motors Corporation
Gowling Lafleur Henderson Llp
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