Ventilator

Details Ventilator Ventilator

1996-02-29

1998-03-03

Joyce, Harold

Ventilation

Having forced recirculation

Including automatic control means

454228, 236 493, F24F 706, F24F 11053

Patent

active

057228868

ABSTRACT:
A ventilator which includes a male member is telescopically received within a female housing. The male member is longer than the passage in the female housing such that the male member protrudes from the passage of the female housing. Radial air flow passages are positioned at both the first end and the second end of the male member. Relative movement of the male member and the female housing in a first direction diminishes the area of radial air flow passages exposed to air flow from the first end of the female housing while increasing the area of the radial air flow passages exposed to air flow from the second end of the female housing. Relative movement in a second direction diminishes the area of radial air flow passages exposed to air flow from the second end of the female housing while increasing the area of the radial air flow passages exposed to air flow from the first end of the female housing.

REFERENCES:
patent: 2119935 (1938-06-01), Youker
patent: 2313676 (1943-03-01), Shaver
patent: 3307469 (1967-03-01), Bohanon
patent: 3517601 (1970-06-01), Courchesne

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