Hydraulic cylinder with internal safety valve

Details Hydraulic cylinder with internal safety valve Hydraulic cylinder with internal safety valve

1994-03-04

1995-03-28

Look, Edward K.

Motors: expansible chamber type

With motive fluid valve

Self-acting valve

60466, 92 15, F15B 1108, F15B 1526

Patent

active

054006945

ABSTRACT:
An internal safety valve for preventing the discharge chute from rapidly falling due a sudden loss of hydraulic fluid pressure. A safety valve assembly for use in a hydraulic cylinder consisting of a safety valve located in the barrel of a hydraulic cylinder. The moveable piston of the hydraulic cylinder has a cavity for receiving the safety valve therein. The safety valve is actuated when the flow leaving the chute lift cylinder exceeds a predetermined flow. The valve immediately stops the hydraulic fluid from leaving the chute lift cylinder maintaining the position of the discharge chute.

REFERENCES:
patent: 2093015 (1937-05-01), Madden
patent: 2821209 (1958-01-01), Waterman
patent: 3142342 (1964-07-01), Brudnak et al.
patent: 3200214 (1965-08-01), Aubert
patent: 3228658 (1966-01-01), London
patent: 3581625 (1971-06-01), Michalak
patent: 4276975 (1981-07-01), Jenkins
patent: 4522285 (1985-06-01), Salmon et al.
patent: 5097748 (1992-03-01), Koch et al.
patent: 5107679 (1992-04-01), Bartlett
patent: 5215178 (1993-06-01), Bartlett
patent: 5235896 (1993-08-01), Huber

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