Hydraulic cylinder sealing structure

Details Hydraulic cylinder sealing structure Hydraulic cylinder sealing structure

1994-12-14

1996-07-30

Ballato, Josie

Brakes

Internal-resistance motion retarder

Including seal or guide

188299, 285138, 2853824, B60G 1708, B60G 1308, F16F 946

Patent

active

055403093

ABSTRACT:
A regulable hydraulic dashpot for motor vehicles with a shock-absorption piston equipped with pressure-sensitive throttle valves traveling back and forth on the end of a piston rod inside a shock-absorption cylinder full of shock-absorbing fluid and dividing the cylinder into two displacement chambers. A gas-filled pressure-compensation chamber operates in conjunction with one displacement chamber. A shock-absorption performance-curve selection valve is positioned outside the cylinder and opens and closes a bypass. To create a hydraulic-fluid channel, the cylinder comprises two parts of different width between the two displacement chambers. One of the parts overlaps the other to the length of the stroke traveled by the piston and its open end is sealed tight to the outer part. The outer part is provided with two hydraulic-fluid conveying connections into the shock-absorption performance-curve selection valve. The parts of the cylinder between the connections are sealed off from each other by a sealing component.

REFERENCES:
patent: 3370870 (1968-02-01), Mahoff
patent: 4960188 (1990-10-01), Wossner
patent: 5375683 (1994-12-01), Huang et al.

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