Cylinder locking apparatus

Details Cylinder locking apparatus Cylinder locking apparatus

1976-05-26

1978-05-09

Cohen, Irwin C.

Fluid handling

Systems

Supply and exhaust

91445, 91447, F15B 1108, F15B 13042

Patent

active

040881512

ABSTRACT:
A cylinder locking apparatus primarily intended for use on counter-balanced lift trucks incorporating lift cylinders of the single-acting type, comprising a positive sealing poppet-type check valve which operates in the normal manner when the system is in the raise mode, but which in the lowering mode is operable by controlled pilot means triggered manually by the system's main control valve spool, thus permitting the load to be lowered by gravity.

REFERENCES:
patent: 3030929 (1962-04-01), Hipp
patent: 3049101 (1962-08-01), Ruhl
patent: 3068596 (1962-12-01), Hein et al.
patent: 3127688 (1964-04-01), Hein et al.
patent: 3906840 (1975-09-01), Bianchetta et al.
patent: 3980000 (1976-09-01), Iijima et al.

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