Hydraulic door construction

Details Hydraulic door construction Hydraulic door construction

1989-06-19

1991-06-04

Johnson, Blair M.

Flexible or portable closure, partition, or panel

Plural strip, slat, or panel type

With mounting or supporting means

160188, 49199, E05D 1500

Patent

active

050205803

ABSTRACT:
A hydraulically actuated door for a large opening of a building comprises a door formed in two parts divided by a horizontal hinge line so that a lower part can fold up under the upper part in an open position of the door. The upper part carries two flanges one at each side which project outwardly from the front face of the door. A ram extends from the base of a door post upwardly to the flange so that an upward force from the ram pivots the door about a horizontal hinge line at the top of the door to an open position in which the door extends outwardly from the horizontal hinge line. A level mechanism including a push rod pushes the lower portion of the door in a folding action around the center hinge line of the door up under the upper portion of the door into the folded position. Force from the opening action is thus communicated at the base of the posts rather than to the building and the door provides a wide opening with little height encumbrance and the actuating equipment on the exterior of the building.

REFERENCES:
patent: 2393052 (1946-01-01), Mehard
patent: 3207502 (1965-09-01), Houk
patent: 3224494 (1965-12-01), Houk
patent: 3238995 (1966-03-01), Bonzer

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