Stroke limiter for hydraulic cylinder

Details Stroke limiter for hydraulic cylinder Stroke limiter for hydraulic cylinder

1988-02-29

1989-04-18

Garrett, Robert E.

Motors: expansible chamber type

Working member position responsive motive fluid control

Venting expanding chamber

91422, 92 134, 92 1341, 92 136, 92181P, F15B 1522

Patent

active

048216240

ABSTRACT:
A stroke limiter for a hydraulic cylinder comprises two sleeve portions each having a channel located therein that are frictionally mounted to the piston rod adjacent to the piston. An elongated contactor is slidably received in each of the channels. The contactor is longer than the sleeve portion and extends past the bottom of the sleeve. The top of the sleeve is provided with a cutout portion which is adjacent to the contactor and provides a hydraulic fluid flow path from the piston mounted poppet valves. When the contactor contacts the end cap of the cylinder, the contactor slides upwardly in the sleeve and contacts the poppet valves in the cylinder unseating the valves and creating a hydraulic fluid flow path across the piston.

REFERENCES:
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patent: 1117729 (1914-11-01), Ward
patent: 2299211 (1942-10-01), Clench
patent: 2311816 (1943-02-01), Collins
patent: 3338552 (1967-08-01), Persicke
patent: 3616728 (1971-11-01), Kennedy
patent: 3654834 (1972-04-01), Sifri et al.
patent: 3815480 (1974-06-01), Spyra
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patent: 4077750 (1978-03-01), Hake
patent: 4442754 (1984-04-01), Jezbera
patent: 4469014 (1984-09-01), Nelson
patent: 4651906 (1987-03-01), Hoffmann et al.
patent: 4679989 (1987-07-01), Harriman et al.

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