Negative air control unit and closure structure

Details Negative air control unit and closure structure Negative air control unit and closure structure

1988-11-30

1990-05-29

Joyce, Harold

Tent, canopy, umbrella, or cane

Umbrella

Self-opening and closing

4527, 4599, 98 331, 135106, 135117, 160354, F24F 700

Patent

active

049285815

ABSTRACT:
A portable negative air control unit and closure structure which can be utilized therewith to form enumerable different configurations. The basic unit includes a base which can be a shower containment pool, at least one closure structure having a door therein and top and side fabric walls which are removably attached to the closure structure, such as by zippers. The unit also can be attached to additional walls to form one of several interconnected units.

REFERENCES:
patent: 2519430 (1950-08-01), Brown
patent: 2546588 (1951-03-01), Ellis
patent: 3169543 (1965-02-01), McGerty
patent: 3513862 (1970-05-01), Pohl et al.
patent: 3629875 (1971-12-01), Dow
patent: 3766844 (1973-10-01), Donnelly
patent: 4084597 (1978-04-01), Compton
patent: 4304224 (1981-12-01), Forthey
patent: 4570384 (1986-02-01), Eckel
patent: 4639035 (1987-01-01), Icaacson
patent: 4675923 (1987-06-01), Ashley
patent: 4706551 (1987-11-01), Schofield
patent: 4800597 (1989-01-01), Healey

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