Stroke limiting apparatus for hydraulic cylinders

Details Stroke limiting apparatus for hydraulic cylinders Stroke limiting apparatus for hydraulic cylinders

1977-04-05

1979-05-01

Maslousky, Paul E.

Valves and valve actuation

Reciprocating valve

Push or pull operator

251145, 91404, F16K 1500, F16K 5100, F15B 1522

Patent

active

041519787

ABSTRACT:
The invention relates to a valve assembly adapted in conjunction with a valve actuator to provide positive control of the stroke of hydraulic cylinders. The valve is attached to a pressure port on the cylinder and the actuator assembly is positioned on the side of the cylinder and held by means of clamps. The stroke of the cylinder is limited when the actuator arm is clamped on the piston shaft at a distance shorter than the full stroke of the cylinder. In this condition as the shaft moves into the cylinder, the actuator arm contacts closure means within the valve thereby closing off the valve and preventing further retraction of the cylinder. The apparatus of the invention is adapted to be supplied in the kit form and can be readily attached, externally to any existing hydraulic actuator.

REFERENCES:
patent: 2606414 (1952-08-01), Dyrr
patent: 2699150 (1955-01-01), Liskal
patent: 3667347 (1972-06-01), Patrick
patent: 3972265 (1972-08-01), Magnuson

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