Poppet with a flow increasing element for limiting movement ther

Details Poppet with a flow increasing element for limiting movement ther Poppet with a flow increasing element for limiting movement ther

1999-02-25

2000-04-11

Ferensic, Denise L.

Valves and valve actuation

Fluid actuated or retarded

Pilot or servo type motor

251 42, F16K 3112

Patent

active

060479442

ABSTRACT:
A poppet adapted for movement in a passage extending between an inlet port and a control chamber of a poppet valve for controlling a fluid flow rate into the control chamber from the inlet port responsive to changes in a fluid flow rate from the control chamber, the poppet including at least one metering port positioned for communicating with the control chamber, a conduit connecting the metering port with an opening positioned for communicating with the inlet port for the flow of the fluid from the inlet port to the metering port, and at least one flow increasing element communicating with the conduit positioned to be covered by an inner sidewall when the poppet is within a predetermined range of displacement from a closed position toward the control chamber, the flow increasing element being increasingly exposed to the control chamber when the poppet is displaced toward the control chamber beyond the range, and the flow increasing element cooperating with the metering port when the poppet is at a predetermined stop position beyond the range to provide a fluid flow rate to the control chamber greater than the fluid flow rate from the control chamber for limiting the movement of the poppet beyond the stop position responsive to further increases in the fluid flow rate from the control chamber.

REFERENCES:
patent: 2672888 (1954-03-01), Shields
patent: 3279743 (1966-10-01), De La Garza
patent: 3858841 (1975-01-01), Haynes
patent: 4671485 (1987-06-01), Saarem
patent: 4893645 (1990-01-01), Augustinas et al.
patent: 4920861 (1990-05-01), Lorimor
patent: 5137254 (1992-08-01), Aardema et al.
patent: 5645263 (1997-07-01), Aardema

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