Brakes – Internal-resistance motion retarder – Having a thrust member with a variable volume chamber
Patent
1989-05-15
1990-05-29
Butler, Douglas C.
Brakes
Internal-resistance motion retarder
Having a thrust member with a variable volume chamber
18832213, 18832221, 188352, 267221, F15B 1522, F16L 324
Patent
active
049287990
ABSTRACT:
A hydraulic dashpot comprising a cylinder, a piston separating the cylinder into a pair of chambers, a rod connected to the piston and projecting outwardly of the cylinder, a storage chamber for compensating hydraulic fluid, and a passage for conducting compensating fluid between the storage chamber and the pair of chambers. A first valve is provided in the passage for controlling fluid flow between the passage in at least one of the pair of chambers with the first valve being accommodated in a first valve body. A second valve is immediately upstream of the first valve body and closes fluid communication through the passage in a direction away from the storage chamber in automatic response to the removal of the first valve body from the passage.
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Butler Douglas C.
Lisega GmbH
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