Dashpots

Details Dashpots Dashpots

1994-05-18

1995-09-19

Graham, Matthew C.

Brakes

Internal-resistance motion retarder

Having a thrust member with a variable volume chamber

188310, F16F 904

Patent

active

054509327

ABSTRACT:
A liquid dashpot has a casing comprising a main body and bottom cover. The main body contains a liquid chamber which is divided into two discrete spaces by a vane member. One end wall of the chamber has porting passage means formed between the outer face of said wall and the bottom cover to provide restricted communication between the chamber spaces. A flexible diaphragm forms a compensation chamber on the bottom cover subject to atmospheric pressure. The chamber can communicate with the spaces within the liquid chamber through non-return means that block super-atmospheric flow to the compensating chamber. The porting and the communicating passage means between the spaces and the compensating chamber are formed integrally in the die-cast main body and/or the bottom cover, requiring no machining. Assembly is facilitated by bringing together the bottom cover, flexible diaphragm and non-return means as a sub-assembly.

REFERENCES:
patent: 933076 (1909-09-01), Houdaille
patent: 2016591 (1935-10-01), Chapin
patent: 2991992 (1961-07-01), Elsner
patent: 2997140 (1961-08-01), Rumsoy et al.
patent: 3620523 (1971-11-01), Benjamin
patent: 3891199 (1975-06-01), Willich et al.
patent: 4768630 (1988-09-01), Aubry et al.

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