Apparatus for controlled stabilized descent

Details Apparatus for controlled stabilized descent Apparatus for controlled stabilized descent

2005-05-10

2005-05-10

Chin-Shue, Alvin (Department: 3634)

Fire escape, ladder, or scaffold

Platform with elevating or lowering means

Suspended

C182S145000, C182S069400, C182S127000

Reexamination Certificate

active

06889798

ABSTRACT:
An apparatus for descent, suspension and retrieval of a worker through an opening in the ground includes a trailer having a boom assembly mounted thereon is described. The boom assembly includes telescopically extensible and retractable boom members that are extended downwardly by action of gravity through opening to a subsurface location. The worker is supported in a stabilized manner during descent, suspension, and retraction of the boom members.

REFERENCES:
patent: 2821312 (1958-01-01), Wiegel
patent: 4314622 (1982-02-01), Lindquist
patent: 4643273 (1987-02-01), Stokoe
patent: 5445032 (1995-08-01), Dixon
patent: 2735507 (1996-12-01), None

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