Counterbalance valve with improved relief pressure setting arran

Details Counterbalance valve with improved relief pressure setting arran Counterbalance valve with improved relief pressure setting arran

1997-04-17

1999-03-02

Lee, Kevin

Fluid handling

Convertible

Reversible check

137106, 251 25, 91420, 91447, F15B 1303

Patent

active

058758119

ABSTRACT:
In order to achieve repeatable, consistent operation of a counterbalance valve, a poppet valve element within the valve has a radial bore therein in communication with a control fluid port and an axial bore therein which receives a rod that is anchored to a poppet valve cage that surrounds the poppet valve element. The poppet valve element is urged by a spring into engagement with a valve seat and pilot pressure is applied in opposition to the spring. By virtue of this arrangement, control fluid pressure is applied via the rod directly to the valve body in which the poppet valve element and cage are mounted. By changing the diameter of the rod and axial bore through the poppet valve element which receives the rod, the relief set pressure can easily be changed.

REFERENCES:
patent: 3266852 (1966-08-01), Bueler
patent: 4172582 (1979-10-01), Bobnars et al.
patent: 4244275 (1981-01-01), Smilges
patent: 4461449 (1984-07-01), Turner
patent: 5309936 (1994-05-01), Christensen
patent: 5400816 (1995-03-01), Gerstenberger

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