Valves and valve actuation – Reciprocating valve – Push or pull operator
Patent
1993-12-20
1995-08-08
Rivell, John
Valves and valve actuation
Reciprocating valve
Push or pull operator
251324, F16K 324
Patent
active
054391997
ABSTRACT:
A valve selectively dispenses noncompressible fluid from a pressurized source into a receptacle. The valve has a body with a valve spool slidingly retained in a hollow cylinder in the body. The ends of the body are communicated by an internal channel, the first end adapted to engage the source and the second end adapted to engage the receptacle. The hollow cylinder is an intermediate part of the internal channel. The valve spool has first and second enlarged portions that effectively divide the hollow cylinder into first and second noncommunicated chambers. When the valve spool is in a closed position, the first end is communicated only with the first chamber and the pressure of the fluid in the first chamber provides an outward biasing force on the valve spool, keeping it in the closed position. When the valve spool is moved to an open position by application of an external force on the valve spool overcoming the outward biasing force, the first end is communicated with both the first chamber and the second chamber, which has a link with the second end, allowing fluid flow through the valve. Release of the external applied force allows the pressure of the fluid in the first chamber to restore the valve spool to the closed position. The valve spool is retained in the cylinder by a pin seated in an aperture in the first end such that an end of the pin extends into the cylinder, or a collar fitted around the valve spool near the end.
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Briggs Michael
Geething Rick C.
Lowe Gerald A.
Wagonfield Patrick
Zach John S.
Rivell John
The National Latex Products Company
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