Supports: cabinet structure – With movable components – Having biasing means
Patent
1990-04-24
1991-09-24
Dorner, Kenneth J.
Supports: cabinet structure
With movable components
Having biasing means
312209, 49445, 160190, A47B 9500
Patent
active
050509438
ABSTRACT:
A biological safety cabinet vertical lift assist system employing one or more pneumatic springs operatively connected to the cabinet and sliding window to counterbalance the window's weight to provide a substantially constant brake force spring resulting in smoother and easier operation of the window.
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patent: 4307874 (1981-12-01), Reuschenbach et al.
patent: 4342355 (1982-08-01), Geller et al.
patent: 4373707 (1983-02-01), Molders
patent: 4406240 (1983-09-01), Andersen
patent: 4423536 (1984-01-01), Cross
patent: 4844567 (1989-07-01), Chalabian
Dorner Kenneth J.
Forma Scientific, Inc.
Green Brian K.
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