Telescopic lifting device

Details Telescopic lifting device Telescopic lifting device

2007-02-06

2007-02-06

Nguyen, Hoang (Department: 3748)

Expansible chamber devices

Mutually relatively movable cylinder or sleeve, member...

C092S052000, C091S168000

Reexamination Certificate

active

11018576

ABSTRACT:
The invention relates to a telescopic lifting column. The lifting column comprises a plurality of tube bodies which are arranged concentrically inside one another and are axially movable in each case with respect to each other. Furthermore, the lifting column comprises a hydraulic actuator unit which is arranged in the tube bodies so as to be operating in the axial direction. The hydraulic actuator unit comprises a first hydraulic cylinder-piston unit and a second hydraulic cylinder-piston unit connected with the first, the first cylinder-piston unit being connected to a first end of the telescopic lifting column and the second cylinder-piston unit being connected to a second end of the telescopic lifting column. The first cylinder-piston unit is of the type having a first variable operating chamber and a second variable operating chamber. The second cylinder-piston unit is of the type having a single variable operating chamber which is in communication with the second operating chamber of the first cylinder-piston unit.

REFERENCES:
patent: 2212329 (1940-08-01), Smith, Jr.
patent: 2649693 (1953-08-01), Venus
patent: 3250182 (1966-05-01), Nansel
patent: 4733598 (1988-03-01), Innes et al.
patent: 5263402 (1993-11-01), Gottlieb
patent: 5377432 (1995-01-01), Kishi
patent: 2002/0144349 (2002-10-01), Blyshak et al.
patent: 0 567 218 (1993-10-01), None
patent: 0 897 894 (1999-02-01), None

Affiliated with

Also associated with

Rating

Telescopic lifting device does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Telescopic lifting device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Telescopic lifting device will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3851459