Clutch master cylinder with internal reservoir

Details Clutch master cylinder with internal reservoir Clutch master cylinder with internal reservoir

F - Mech Eng,Light,Heat,Weapons

16

D

192/12, 303/84

F16D 25/12 (2006.01) B60T 11/16 (2006.01) B60T 11/22 (2006.01)

Patent

CA 1242400

ABSTRACT A master cylinder employed in connection with a fluid actuated motor vehicle clutch system. The master cylinder includes an internal reservoir formed by a portion of the sane cylindrical housing which makes up the clutch actuating working chamber. A plug is provided within the cylindrical housing to divide the housing into two sections, a working chamber and a reservoir chamber. The plug further includes a check valve system which permits fluid to flow into and out of the working chamber from the reservoir as the fluid capacity of the associated hydraulic circuit changes. Flow into and out of the reservoir is permitted to occur only when an externally applied load to the master cylinder is released. The reservoir chamber includes a slidable piston and a low spring constant helical spring which biases the reservoir plunger to provide a slight hydrostatic pressure for the fluid contained by the reservoir, thereby preventing the ingestion of air or contaminants. In an embodiment of the invention, the fluid in the reservoir chamber may be initially pressurized to a greater than atmospheric pressure so as to give a small degree of boost to the system. This design configuration eliminates the requirement of providing an externally mounted reservoir or a reservoir which is mounted above the working chamber such that fluid therein is gravity fed into the working chamber. This design also permits the use of manufacturing techniques such as deep drawing of metal to construct the entire master cylinder and reservoir from a single tube structure.

466770

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