F - Mech Eng,Light,Heat,Weapons – 16 – L
Patent
F - Mech Eng,Light,Heat,Weapons
16
L
137/138
F16L 55/00 (2006.01) F16K 47/04 (2006.01)
Patent
CA 1128832
P2011. 1 ABSTRACT OF THE DISCLOSURE A fluid flow restrictor for use in a high pressure valve or the like which comprises a series of closely inter- fitting concentric cylinders alternately attached to the valve seat and an axially movable valve plug of the valve. In one advantageous embodiment of the invention, various arrangements of slot openings are formed through the several cylinders. The slot openings may be of any geometric shape, for example, rec- tangular or trapezoidal, and are of sufficient volume to act as expansion chambers for a compressible fluid. The openings of each cylinder communicate with the openings of an adjacent cyl- inder by various overlapping relationships between openings or by viscous friction flow paths between the cylinders to form restricting flow paths therebetween. Axial displacement of the valve plug will move the interfitting cylinders with respect to one another to vary the flow path dimensions between the slot openings of the cylinders. In another specific form of the invention, the interfitting cylinders are slotless, providing a viscous friction flow path between cylinders and expansion chambers above the open ends of each cylinder and between adjacent cylinders.
335733
Brighton John A.
Schnall Ira H.
Osler Hoskin & Harcourt Llp
White Consolidated Industries Inc.
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