Hydraulic door opening mechanism and method of installing a...

Details Hydraulic door opening mechanism and method of installing a... Hydraulic door opening mechanism and method of installing a...

2007-05-22

2007-05-22

Purol, David M. (Department: 3634)

Flexible or portable closure, partition, or panel

Plural strip, slat, or panel type

With mounting or supporting means

C160S188000

Reexamination Certificate

active

11037796

ABSTRACT:
A hydraulic door opening mechanism for overhead bi-fold doors is herein disclosed. The door opening mechanism mounts a hydraulic pump, pressure reservoir, valve manifold, and a hydraulic motor or cylinder on a first door panel. The door opening mechanism is pre-assembled with the doorframe prior to mounting the door in the door opening.

REFERENCES:
patent: 2491261 (1949-12-01), Greer
patent: 4102382 (1978-07-01), Vesbach
patent: 4545418 (1985-10-01), List et al.
patent: 4609027 (1986-09-01), Keller
patent: 4896714 (1990-01-01), Ellis
patent: 5168914 (1992-12-01), Keller
patent: 5343923 (1994-09-01), Keller
patent: 6056037 (2000-05-01), Jonkman, Sr. et al.
patent: 6199617 (2001-03-01), Schweiss
patent: 6547292 (2003-04-01), Keller

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