Unbalanced spool

Details Unbalanced spool Unbalanced spool

1981-12-21

1983-08-09

Smith, Leonard E.

Pumps

Motor driven

Fluid motor

91301, 13762566, F04B 3500, F01L 2504

Patent

active

043976140

ABSTRACT:
This invention concerns a fluid operated valve with a slidable valve member having formations enabling differential operating forces to be applied thereto and preferably having means to relieve pressure from the leading formation during travel of the member to promote `snap` action and preferably being associated with a pneumatic piston and cylinder motor driving an hydraulic pump in an integrated unit constituting a pneumatic/hydraulic convertor.

REFERENCES:
patent: 1495333 (1924-05-01), Kruger
patent: 3901313 (1975-08-01), Donigvian et al.
patent: 4028014 (1977-06-01), Cocks
patent: 4068983 (1978-01-01), Balme et al.

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