Ventilator

Details Ventilator Ventilator

1993-07-08

1994-12-27

Joyce, Harold

Ventilation

Means combined with window

Having air passage in sash

251303, 454195, 454213, E06B 702, F24F 1318

Patent

active

053760441

ABSTRACT:
A two-part plastics ventilator comprises a housing defining a ventilation opening, a flap pivotal to open and close the opening, and spring legs integral with the housing to bias the flap to the open and closed positions.

REFERENCES:
patent: 1609409 (1926-12-01), Hubbard
patent: 2804008 (1957-08-01), Koch
patent: 2871523 (1959-02-01), Negoro

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