Valves and valve actuation – Rotary valves – Ball valve
Patent
1987-10-13
1989-03-14
Garrett, Robert E.
Valves and valve actuation
Rotary valves
Ball valve
98DIG10, 92 92, 251 611, F24F 1308
Patent
active
048115754
ABSTRACT:
A bellows assembly is secured to a retainer by extrusions having a mushroom or arrow shaped cross section. Air flowing through the terminal impinges upon an impervious film covering the central portion of the device and is diverted into two flow paths. Initially the flow paths extend between the film and the cutoff plates which coact to form a tight shut off. Downstream of the cutoff plates, the flow paths are between a porous foam covering the bellows and foam surrounding the cutoff plates to provide a sound reducing effect. If necessary or desirable, the back of the retainer may be covered with foam or other suitable sound insulating material.
REFERENCES:
patent: 3120192 (1964-02-01), Winchell
patent: 3168907 (1965-02-01), Mercier et al.
patent: 3198228 (1965-08-01), Naito
patent: 3412669 (1968-11-01), Averill
patent: 3495502 (1970-02-01), Bousso
patent: 3554111 (1971-01-01), Traver
patent: 3881686 (1975-05-01), Hirmann
patent: 4019566 (1977-04-01), Cobb
patent: 4077310 (1978-03-01), McCabe et al.
patent: 4399739 (1983-08-01), Dean
patent: 4442760 (1984-04-01), Dean et al.
patent: 4624442 (1986-11-01), Duffy et al.
Currier Frederick A.
Herb Carl C.
Carrier Corporation
Garrett Robert E.
Kapsalas George
Zobkiw David J.
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