Fluid handling – Line condition change responsive valves – Bi-directional flow valves
Patent
1989-01-17
1990-03-20
Rosenthal, Arnold
Fluid handling
Line condition change responsive valves
Bi-directional flow valves
251206, 251208, 137382, F16K 1518, F16K 332
Patent
active
049092774
ABSTRACT:
A flow metering device for installation in a liquid refrigerant line. A rotatable member is positioned in a flow passage between inlet and outlet ports within an enclosed chamber of the device. The member includes a portion having a plurality of orifices of different sizes having centers arranged on a circle concentrically surrounding the axis about which the member is rotatable to position a desired one of the orifices in the flow path. The enclosed chamber is accessible to permit physical rotation of the member by removal of a threaded cap normally covering an open side of the chamber. An O-ring seal prevents escape of pressurized refrigerant when the cap is removed. A check valve assembly may be included to accommodate flow of refrigerant in the opposite direction, as when used in heat pump applications where two of the devices would be employed, one with each of the indoor and outdoor coils. Only one metering device, which need not include the check valve assembly, would be used with an air conditioner, mounted at the inlet to the evaporator.
REFERENCES:
patent: 2042845 (1936-06-01), Henry
patent: 2621012 (1952-12-01), Graham
patent: 3677516 (1972-07-01), Hicks
patent: 4148460 (1979-04-01), Kinsler
patent: 4402340 (1983-09-01), Lockwood, Jr.
patent: 4582084 (1986-04-01), Gyurovits
McGuire Charles S.
Rosenthal Arnold
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