Assist mechanism for lifting and closing large enclosures

Details Assist mechanism for lifting and closing large enclosures Assist mechanism for lifting and closing large enclosures

2007-11-06

2007-11-06

Redman, Jerry (Department: 3634)

Movable or removable closures

With means mounting closure for swinging

With biasing means

Reexamination Certificate

active

10888229

ABSTRACT:
An assist mechanism for assisting in the pivotal movement of an enclosure member between closed, intermediate, and open positions. A first biasing member has a swing arm pivotally connected to a strut and extends between a base plate and enclosure member, and a second biasing member has a link pivotally connected to a limited tension spring and also extends between the base plate and enclosure member, whereby each impart a substantially biasing force substantially on only one side of the intermediate position, with the first biasing member biasing the enclosure member away from the closed position, and a second biasing member biasing the enclosure member away from the open position.

REFERENCES:
patent: 4296575 (1981-10-01), Verable et al.
patent: 4566552 (1986-01-01), Hoffman et al.
patent: 4991675 (1991-02-01), Tosconi et al.
patent: 5950252 (1999-09-01), Fettes
patent: 6789357 (2004-09-01), McCullough

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