Automatic temperature and humidity regulation – Thermostatic – With pressure control
Patent
1982-05-25
1983-11-29
Tapolcai, William E.
Automatic temperature and humidity regulation
Thermostatic
With pressure control
236 93R, G05D 2700
Patent
active
044176899
ABSTRACT:
A pressure regulator for regulating a fluid of varying pressure on the primary side to a constant pressure on the secondary side is provided with a device for compensating the pressure on the secondary side so as to make the regulator capable of delivering a constant quantity of a viscous fluid such as paint irrespective of changes in the temperature of the fluid. The compensating device comprises an inner casing sealed off from the paint passage of the regulator, an assembly of bimetal plates housed within the inner casing and mechanically linked to the valve stem of the regulator, and an auxiliary diaphragm closing the bottom of the inner casing and also linked to the valve stem. The expansion and contraction of the assembly of bimetal plates is applied to the pressure regulating spring of the regulator to change the degree of compression of the pressure regulating spring and thus the fluid pressure on the secondary side in proportion to the temperature of the fluid. The fluid pressure acting on the auxiliary diaphragm is applied to the pressure regulating spring via the valve stem in the direction opposite to the pressure applied to the pressure regulating spring by the main diaphragm of the regulator, thereby in effect reducing the area of the diaphragm and increasing the precision of the regulator.
REFERENCES:
patent: 2486644 (1949-11-01), Grosboll
patent: 2546571 (1951-03-01), Watson
patent: 2590112 (1952-03-01), MacCracken et al.
patent: 2661243 (1953-12-01), Fox
patent: 2829492 (1958-04-01), Kleinman
patent: 2917067 (1959-12-01), Pearl
patent: 3053281 (1962-09-01), Taylor
patent: 3270802 (1966-09-01), Lindberg
patent: 3332436 (1967-07-01), Welty
patent: 4320871 (1982-03-01), Kuroda et al.
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