Linear drive with travel measurement

Details Linear drive with travel measurement Linear drive with travel measurement

2008-07-22

2008-07-22

Duda, Rina I (Department: 2837)

Electricity: motive power systems

Linear-movement motors

C318S687000, C700S060000, C700S228000

Reexamination Certificate

active

07402966

ABSTRACT:
The invention concerns a linear drive (1) with a linear stroke for the displacement of movably supported parts, in particular of articles of furniture, comprising a rotary spindle (2) which is driven by a motor and which at the drive output side is in screwthreaded engagement with a thrust tube (3) or a spindle nut (4) connected thereto with a female screwthread (5), wherein the thrust tube (3) is mounted non-rotatably and slidably in the housing (6) and is displaceable in the housing (6) over a stroke travel h relative to the rotary element, and a travel measuring device for measuring the stroke travel h. With the aim of developing a linear drive (1) in such a way that it is uncomplicated and inexpensive, operates reproducibly accurately and even after power shut-down does not require renewed zeroing for travel measurement, it is proposed that the travel measuring device has a linear potentiometer device (7) with a linear potentiometer (8) and that the linear potentiometer (8) for linear measurement of the stroke travel h is arranged parallel to the stroke travel.

REFERENCES:
patent: 5328303 (1994-07-01), Jang
patent: 5989485 (1999-11-01), Staacks et al.
patent: 6239573 (2001-05-01), Schmall
patent: 2004/0150881 (2004-08-01), Luthardt et al.
patent: 2240728 (1974-02-01), None
patent: 8529883 (1985-12-01), None
patent: 102005035104 (2006-03-01), None
patent: 2006087365 (2006-08-01), None

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