Device for double-acting hydraulic systems
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United States of America Patent
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Jun 17, 1997
Grant Date -
N/A
app pub date -
May 14, 1996
filing date -
Nov 19, 1993
priority date (Note) -
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Abstract
A double acting hydraulic system including a master cylinder and a slave cylinder. Each of two slave cylinder spaces has a nipple boring (12, 22), for a nipple valve (40, 50), with an internal section in a form of a seat (16, 26) cooperating with an end (41, 51) of the nipple valve. A sealing section (19, 29) in each nipple boring located outside the seat slidingly and sealingly abuts a sealing section (44, 54) of the respective nipple valve. There is an annular space between each nipple valve and nipple boring, between the seat and the sealing section; and a connecting channel (35) provides communication between the annular spaces. One of the nipple valves has a nipple channel (60) with one opening (61) into the corresponding annular space and a second opening (62) to outside the nipple boring; and a device (63) that cooperates with the nipple channel to prevent fluid flow from outside the nipple boring to the annular space.
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