Fluid sprinkling – spraying – and diffusing – Unitary injection nozzle and pump or accumulator plunger – Plunger interconnected or mounted bypass
Patent
1995-01-20
1997-10-28
Ballato, Josie
Fluid sprinkling, spraying, and diffusing
Unitary injection nozzle and pump or accumulator plunger
Plunger interconnected or mounted bypass
239 91, 13762527, 251318, 92162R, F02M 4500
Patent
active
056809883
ABSTRACT:
A reciprocating piston/barrel assembly, through which a fluid is capable of flowing, includes a piston having a pressure face separated from a downstream face by a side surface. A barrel has an interior wall surface defining a bore that is sized to slidably receive the piston. The bore is longer than the piston such that the bore includes an upstream volume adjacent the pressure face of the piston and a downstream volume adjacent the downstream face of the piston. The assembly includes some way for producing a pressure differential between the upstream volume and the downstream volume. The side surface and/or interior wall surface include at least one surface irregularity--indentation and/or protrusion--of sufficient size to increase flow resistance. In order to produce the axial force effect of the present invention, the fluid flow between the piston side surface and the barrel's interior wall surface must be faster than the speed of the piston. The axial force phenomenon of the present invention primarily manifests as an increased pressure differential across the piston. When a portion of the surface irregularities appear on the piston, the axial force of the present invention is further increased because a portion of the fluid flow momentum is imparted to the piston. The present invention finds particular applicability in poppet valves where it is desirable to hasten the activation rate of the valve.
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Patil Rajendra K.
Shinogle Ronald D.
Ballato Josie
Becker Mark D.
Caterpillar Inc.
Keen J. W.
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