Telescopically extensible lifting column, in particular for the

Supports – Stand – Standard type

Patent

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Details

248669, 248161, F16M 1100

Patent

active

051141094

ABSTRACT:
A telescopically extensible lifting column, particularly for the height adjustment of a camera, consists of an external column member resting on a base plate, a middle column member which is telescopically extensible from the external column member, and a central column which is extensible from the middle column member and on which the camera can be mounted. By means of a piston/cylinder type drive device, the middle column member can be pressurized pneumatically in relation to the stationary external column member. The drive device also has a traction cable which is wound or a deflection member mounted rotatably on the middle column member. The cable is connected by means of its inner end portion to the central column member and by means of its outer end portion to the external column member. The deflection member has a section which is in the form of a truncated cone with a guide groove, which runs spirally along the cone envelope surface from a region of larger diameter to a region of smaller diameter, to receive the traction cable. The deflection member further has an additional section with a guide groove extension on which, during extension of the lifting column, the inner cable end portion is wound while unwinding the outer cable end portion from the first section.

REFERENCES:
patent: 2081248 (1937-05-01), Murphy
patent: 2215666 (1940-09-01), Meitzler
patent: 2471998 (1949-05-01), Berggren
patent: 2901202 (1959-08-01), Stava et al.
patent: 3575368 (1971-04-01), Thomas et al.
patent: 4605189 (1986-08-01), Bruncau

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