The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 23, 2002
Filed:
Nov. 03, 2000
Andreas Roither, Bielefeld, DE;
Dewert Antriebes- und Systemtechnik GmbH & Co. KG, Kirchlengren, DE;
Abstract
A electromotive drive for a furniture item, in particular lifting device; includes a housing, a drive motor mounted to the housing, a reduction gear unit interacting with the motor, a rotating spindle driven by the reduction gear unit and carrying a spindle nut which is secured against executing a rotational movement so as to move in a linear direction. A flanged tube is mounted to the housing and accommodates a lifting tube which is mounted to the spindle nut so as to be movable between retracted and extended positions when the spindle rotates and the nut is moved in a linear direction. At least one gas spring is arranged within the flanged tube for assisting the lifting tube during a movement of the lifting tube to the extended position, with the gas spring having a piston rod which is movable in retracted and extended positions in synchronism with the lifting tube.