Electricity: conductors and insulators – Feedthrough or bushing – Compression
Patent
1981-03-26
1983-05-31
Tapolcai, William E.
Electricity: conductors and insulators
Feedthrough or bushing
Compression
174 48, 248343, F24F 706, F24F 1308
Patent
active
043855504
ABSTRACT:
A whole house ventillator which can be installed without framing and cutting joists. Struts below the fan blade serve as a support for a fan motor and for a venturi. Adjustable pre-cut sleeving fits over the joists and around the fan to eliminate framing. A shutter assembly may be surface-mounted to the ceiling below the joists.
REFERENCES:
patent: 1690941 (1928-11-01), Nickerson
patent: 1693396 (1928-11-01), Littleton
patent: 2673514 (1954-03-01), Hanks
patent: 2911900 (1959-11-01), Rudy
patent: 3149553 (1964-09-01), Solzman
patent: 3315924 (1967-04-01), Greenwood
patent: 3895568 (1975-07-01), Stone
patent: 4123968 (1978-11-01), Malott
patent: 4271751 (1981-06-01), Timmons
Savla Chandrakant V.
Steiner Robert E.
Emerson Electric Co.
Tapolcai William E.
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