Door of adjustable height

Details Door of adjustable height Door of adjustable height

1976-03-17

1977-05-03

Bell, J. Karl

Movable or removable closures

Closure movement actuated retractable sealing, guiding or...

Strip movement in plane of closure

49470, 49480, E06B 720

Patent

active

040205959

ABSTRACT:
A flat, hollow, vertically elongated door panel has an open bottom. A movable piece is located inside the panel and can move up or down through the bottom. Horizontal bottom pieces are attached to the movable piece and both the bottom and movable pieces are spring-loaded downwardly.

REFERENCES:
patent: 348349 (1886-08-01), Schmidt
patent: 839213 (1906-12-01), Schwartz
patent: 915566 (1909-03-01), Dimick
patent: 2537296 (1951-01-01), Yeakel
patent: 3871133 (1975-03-01), Ellingson

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