Self-raising platform assembly

Details Self-raising platform assembly Self-raising platform assembly

2006-08-15

2006-08-15

Thompson, II, Hugh B. (Department: 3634)

Fire escape, ladder, or scaffold

Platform with elevating or lowering means

Suspended

C182S141000

Reexamination Certificate

active

07090051

ABSTRACT:
A self-raising platform assembly (1) comprising at least one mast (3, 5, 113) along which a platform (13) may be moved up or down including the following: a) a base element (9) with a supporting plate (25) connected to a jack (27) and several stabilizer arms (33, 37) incorporating height adjustment. b) modular mast sections (7) made from rectangular sections with openings (63) cut out to form steps and bars (55) to allow adjacent sections to be bolted together. c) hydraulically operated ram lifting mechanism (73, 83, 84) with hooks (77, 79, 81) to engage steps on the mast to raise and lower the platform. d) a plastic lined sleeve (17, 19) on the platform which slides against the mast. e) a modular platform which can be lengthened or widened by adding additional modules (101, 103).

REFERENCES:
patent: 3323616 (1967-06-01), Best
patent: 4293054 (1981-10-01), Pieri
patent: 4294332 (1981-10-01), Ready
patent: 4809814 (1989-03-01), St.-Germain
patent: 5159993 (1992-11-01), St.-Germain
patent: 5271482 (1993-12-01), Walz
patent: 5575591 (1996-11-01), Vanderklaauw
patent: 5579865 (1996-12-01), Butler et al.
patent: 5746290 (1998-05-01), St. Germain et al.

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