Valves and valve actuation – Reciprocating valve – Gate
Patent
1993-01-06
1993-08-10
Jones, Larry
Valves and valve actuation
Reciprocating valve
Gate
251329, 251332, 431355, 126 39R, F16K 300
Patent
active
052341968
ABSTRACT:
A gas modulating valve for use with a gas burner is disclosed. Two variations of the valve are disclosed: the direct-discharge variation discharges a gas jet directly into the mixing tube of a gas burner, and the in-line variation meters the gas flow from the supply line to a gas manifold, which in turn terminates in one or more fixed orifices which discharge to the burner mixing tube or tubes. With respect to the moving parts, the two variations are identical. In both variations, the modulation of the gas flow is achieved by a thin moveable slide sandwiched in a planar space between two fixed valve body members, through which pass the upstream and downstream portions of a short gas discharge passageway. The slide has a hole which is positioned relative to the axis of the gas discharge passageway so as to produce a discharge orifice of variable size. The valve is sealed against leakage by face seals effected with o-rings. The valve actuator is a stepper motor which is controlled by an electronic controller. The valve and controller communicate through a cable, which permits them to be located any distance apart. The actuator linkage, like the sealing elements, is lubricant-free, so the valve will operate indefinitely without maintenence and over a wide temperature range.
REFERENCES:
patent: 1272263 (1918-07-01), Hooker
patent: 1283907 (1918-11-01), Rigby
patent: 1671617 (1928-05-01), Spitzglass
patent: 2917069 (1959-12-01), Lundy et al.
patent: 3514041 (1970-05-01), Van Rooyen
patent: 4043535 (1977-08-01), Freeman et al.
patent: 4283041 (1981-08-01), Kujawski
patent: 4794907 (1989-01-01), Corliss et al.
patent: 5020774 (1991-06-01), Christianson
patent: 5137261 (1992-08-01), Clifford
Harmony Thermal Company, Inc.
Jones Larry
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