Valves and valve actuation – With means to increase head and seat contact pressure – With positive reduction
Patent
1978-04-05
1979-07-24
Weakley, Harold W.
Valves and valve actuation
With means to increase head and seat contact pressure
With positive reduction
251197, 251199, F16K 2500
Patent
active
041620577
ABSTRACT:
A linear retractable seal valve having an inlet and outlet port and a fluid passageway therebetween with a lateral passageway perpendicular to the fluid passageway and with a wedge sealing-slip assembly slideably held at opposite side edges of the wedge to two guide rails of the valve body and moveable from a distant valve open first location within the lateral passageway to a second location between inlet and outlet ports of the valve. The slip-wedge assembly has at least one closure slip with an inside face of the slip slideably engaging a tapering face of the wedge and with the slip at said second location being restrained from further longitudinal movement and moveable in a perpendicular direction of the longitudinal assembly movement into closure engagement with one of the valve ports. The guide rails are diametrically-opposed and extend longitudinally of the inside face of the lateral passageway into the fluid passageway.
At least one of the guide rails terminates at the second location on the inside wall of the fluid passageway with the end surface of the terminated rail providing a ramp. The wedge on at least one side edge thereof has a locking notch which extends in a transverse direction to the longitudinal assembly movement; this notch is in the side edge of the wedge which is adjacent the terminated rail. An actuating roller which is in engagement with a supporting surface of the slip is positioned to move into and out of the wedge notch at the second valve location; when the valve is in the locking notch of the wedge it engages the longitudinal edge of the adjacent guide rail and serves to lock the slip to the wedge, thereby precluding perpendicular movement of the slip during longitudinal passage of the assembly between the two valve locations. The roller, when in another position, unlocks the slip from the wedge by moving out of the locking notch and out of contact with the longitudinal edge of the rail and into engagement with the ramp at the end of the rail.
REFERENCES:
patent: 1136841 (1915-04-01), Shaw
patent: 1825544 (1931-09-01), Redding
Heinen 2,977,086 3-1961.
The Design of Valves and Fittings, 1953, G. H. Pearson.
Aerojet-General Corporation
Anderson T. Reid
Ansell Edward O.
Weakley Harold W.
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