Precision flow control device

Details Precision flow control device Precision flow control device

1980-11-17

1982-10-05

Nilson, Robert G.

Fluid handling

Line condition change responsive valves

With separate connected fluid reactor surface

G05D 701

Patent

active

043523722

ABSTRACT:
A flow control device (10) is disclosed for achieving precision flow control over a wide range of inlet pressures. The device is particularly suited to household appliance applications where energy savings through hot water conservation are imperative. The device comprises a pressure responsive valve member (88) having a flanged portion (92) sealingly connected by a diaphragm (94) to the walls of a fluid chamber (68) defined by housing portions (14), (18). Flow passageways (104) are formed through diaphragm (94) and flange (92). A flow restricting opening is defined by the space between a control orifice (70) and an end surface (91) on the valve member. An axial passageway (106) in the valve member communicates outlet fluid pressure to a compensating chamber (86) sealed from fluid pressure in the control chamber by a diaphragm (112) mounted thereacross and to one end of the valve member (88).

REFERENCES:
patent: 2224216 (1940-12-01), Coberly
patent: 2658522 (1953-11-01), Coberly
patent: 2909191 (1959-10-01), Horton
patent: 3351087 (1967-11-01), Welty
patent: 3565098 (1971-02-01), Welty
patent: 3586036 (1971-06-01), Barnes
patent: 3593742 (1971-07-01), Taylor
patent: 3602252 (1971-08-01), Barnes
patent: 3805824 (1974-04-01), Robbins

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