Brakes – Internal-resistance motion retarder – Having a thrust member with a variable volume chamber
Patent
1992-09-23
1993-12-21
Oberleitner, Robert J.
Brakes
Internal-resistance motion retarder
Having a thrust member with a variable volume chamber
188317, 18832215, 18832222, 267150, F16F 500
Patent
active
052714853
ABSTRACT:
A hydraulic damper has a dashpot piston reciprocating in a cylinder bore. Piston rods extend axially from both sides of the piston. Sealing structures at both ends of the cylinder connect to the cylinder and sealingly engage the piston rods to form two symmetrical hydraulic working chambers divided by the dashpot piston. A narrow passage through the piston provides a restricted fluid flow path between the two working chambers for hydraulic damping of piston motion. A cavity in the first piston rod is provided with a spring-biased, sliding reservoir piston forming a pressurized hydraulic fluid reservoir connected to the midpoint of the narrow passage between working chambers by a narrow conduit. Both narrow passage and conduit have fixed dimensions and no valves. A cavity in the second piston rod contains a spring centering mechanism.
REFERENCES:
patent: 3105574 (1963-10-01), Hoffmann et al.
patent: 3229951 (1966-01-01), Quick
patent: 3933337 (1976-01-01), Morris
patent: 3944031 (1976-03-01), Cholet
patent: 4099602 (1978-07-01), Kourbetsus
patent: 5078239 (1992-01-01), Kobayashi
Davis, Jr. William E.
Samuelson Duane
Yowell Gordon
Blum Alvin S.
Oberleitner Robert J.
Predator Systems Inc.
Young Lee W.
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