Telescopic lifting column with a safety device

Details Telescopic lifting column with a safety device Telescopic lifting column with a safety device

2007-07-10

2010-12-14

Ramirez, Ramon O (Department: 3632)

Supports

Stand

Standard type

C248S404000

Reexamination Certificate

active

07850131

ABSTRACT:
The invention is a telescopic column (1) comprising: two or more tubular members (2; 3) telescopically engaging one inside the other; a drive unit (6) contained inside the tubular members (2; 3); a cover (4) attached to the end of the inner tubular member (3); a supporting plate (8) attached to the outside of the cover (4); a tubular rod (5) associated with the drive unit (6), installed inside the tubular members (2; 3) with its end (5a) associated with the cover (4); means (7) for controlling the extension and withdrawal of the tubular members (2; 3). During the withdrawal of the tubular rod (5) inside the tubular members (2; 3), a safety device (9) operatively connected to the control means (7) stops the drive unit (6) if a counteracting element (C) obstructs the lowering of the supporting plate (8).

REFERENCES:
patent: 4552403 (1985-11-01), Yindra
patent: 4635492 (1987-01-01), Uebelhart
patent: 2001/0013307 (2001-08-01), Stone
patent: 2005/0161648 (2005-07-01), Oudelaar
patent: 2005/0236564 (2005-10-01), Keller et al.
patent: 2006/0144179 (2006-07-01), Greilinger et al.
patent: 2008/0099637 (2008-05-01), Pai
patent: 0 555 198 (1993-08-01), None
patent: WO 01/68507 (2001-09-01), None
International Search Report re application No. PCT/EP2007/057054, dated Nov. 8, 2007.
Written Opinion re application No. PCT/EP2007/057054, dated Nov. 8, 2007.

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