EDWARD C GRAUER
Engineers in Lansdale, PA
License number
Pennsylvania PE020276E
Category
Engineers
Type
Professional Engineer
Address
Address
Lansdale, PA 19446
Professional information
Process And Apparatus For Elevating A Folding Roof System
US Patent:
4216633, Aug 12, 1980
Filed:
May 11, 1978
Appl. No.:
5/905069
Inventors:
Edward C. Grauer - Lansdale PA
William H. Kennedy - Wyncote PA
William H. Kennedy - Wyncote PA
Assignee:
General Electric Company - Philadelphia PA
International Classification:
E04D 1500
US Classification:
52122
Abstract:
A lifting apparatus for elevating folding roof sections comprises a pair of jackknifing lifting bars. A hoist means transmits a pulling force to the bars, thereby enabling each bar to unfold from a initial folded configuration into an extended straight configuration. The bars elevate first roof sections to an intermediate pitch while unfolding into the straight configuration and while rotating into a generally vertical position with respect to the first roof sections. Remaining roof sections, together with the first roof sections, are elevated to a desired pitch with the bars in the straight configuration by applying additional force. Additional force causes the bars to rotate from the vertical position into a generally horizontal position while lifting both first and second roof sections to the desired pitch. At the start of the lift, all roof sections are horizontally folded and substantially supported on first segments of hinge plates fastened thereto. Second segments of these hinge plates are attached to the top ends of interconnecting side walls.