Valves and valve actuation – Rotary valves – Butterfly
Patent
1988-11-14
1990-01-09
Rivell, John
Valves and valve actuation
Rotary valves
Butterfly
98 4029, 98 411, F16K 1226, F24F 1314
Patent
active
048922889
ABSTRACT:
An adjustable louver unit for controlling the quantity and/or direction of the air flow in air systems, such as heaters, air conditioners and the like. This louver unit includes a rotary vane assembly having a central longitudinal shaft. A blade perpendicular and radial to the shaft, and containing circular vanes projecting from the blade and at an angle to the longitudinal axis of the central shaft. This entire rotary vane array, comprising a single member is molded from a continuous unitary material having a central shaft, a radial blade and a plurality of vanes, all having been formed from flexible plastic resin, which provides for ease of assembly, durability, simplicity, and efficiency of operation.
The vane array is installed in a rigid louver frame, (having concentrically curved inner longitudinal surfaces), in a manner to permit simplicity of installation, and ease of directional adjustment, and without the need for conventional sealing materials of any kind, such as felt, or foamed rubber strips glued to the bezel and thus shutting the air off when the edges of the central blade of the rotor come in contact with the felt or foam strips to permit complete shut off of the air flow. In a preferred embodiment the entire rotor vane array may be made of extremely flexible plastic material and the flexible rotor shaft is molded around a stiffener, such as a metal or wood dowel, to permit rotation without twisting.
REFERENCES:
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patent: 2864301 (1958-12-01), Katz
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patent: 3724812 (1973-04-01), Richardson
patent: 3804366 (1974-04-01), Rubright
patent: 4351511 (1982-09-01), Garrigues
patent: 4402486 (1983-09-01), Jacquet
patent: 4492361 (1985-01-01), Jacquet et al.
Baker John W.
Norbury, Jr. Raymond L.
Poynter Vernon L.
Cary Products Co., Inc.
Copeland T. D.
Rivell John
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