Speed limiting device designed to equip the slide valve of a hyd

Details Speed limiting device designed to equip the slide valve of a hyd Speed limiting device designed to equip the slide valve of a hyd

1984-06-22

1987-01-06

Chambers, A. Michael

Motors: expansible chamber type

With motive fluid valve

Pilot valve

91370, 91371, 91433, 13762566, F15B 1108

Patent

active

046337628

ABSTRACT:
A speed limiting hydraulic slide valve. The slide valve is provided with control pressure chambers at each end thereof. The slide is provided with a longitudinal passage at each end and this passage opens into the adjacent control pressure chamber. Each passage is normally closed by a check valve. Each longitudinal passage communicates with a peripheral passage on the valve of the slide by means of a radial passage. If the hydraulic actuator, such as a cylinder, begins to move too rapidly, the pressure in the radial passage will drop, and the pressure in the appropriate control pressure chamber will thereupon overcome the check valve in the passage which opens into such chamber, and this will cause the valve slide to move in a direction which will decelerate the action of the cylinder.

REFERENCES:
patent: 3706322 (1972-12-01), Carlson
patent: 3862643 (1975-01-01), Dezelon et al.
patent: 3893471 (1975-07-01), Byers, Jr.
patent: 3988966 (1976-12-01), Leonard
patent: 4438827 (1984-03-01), Long
patent: 4463819 (1984-08-01), Becker et al.

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