Brakes – Internal-resistance motion retarder – Position of thrust member relative to chamber
Patent
1994-09-02
1996-10-22
Young, Lee
Brakes
Internal-resistance motion retarder
Position of thrust member relative to chamber
188315, 188318, F16F 948
Patent
active
055667945
ABSTRACT:
A nonadjustable shock absorber that can accommodate for variations in weight, and propelling force, and to provide a specific deceleration or reaction force. The shock absorber provides dual function metering that combines soft contact dampening with the self compensating ability to decelerate a wide range of weights. The shock absorber includes a low pressure zone, a hydraulic cylinder having a high pressure zone chamber, a piston in said cylinder for movement under a shock load through a predetermined stroke length, a fluid pathway metering control means, having four fluid metering pathways of which the first three fluid metering pathways are approximately linear spaced apart, for controlling high pressure fluid escaping from the high pressure zone chamber into the lower pressure zone, ahead of the piston as the piston moves from an initial position in response to a shock load through a total stroke to a final position, to create five control zones during the compression of the shock absorber. The five control zones are created by four transition points that occur when the piston successively closes off the area of each of the four fluid metering pathways of the fluid pathway metering control means, such as four fixed orifices having predetermined areas.
REFERENCES:
patent: 3556268 (1971-01-01), Fister et al.
patent: 3645365 (1972-02-01), Domeck
patent: 4284177 (1991-08-01), Domek
patent: 5388711 (1995-02-01), Hodges
Ace Controls, Inc.
Mentag Robert G.
Young Lee
LandOfFree
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