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:
Jan. 18, 2005
Filed:
Apr. 11, 2003
Nomerange Herve Marcel, Caen, FR;
Nomerange Herve Marcel, Caen, FR;
Abstract
The invention concerns a gear motor (), in particular for driving vehicle equipment, comprising a rotor provided with a rotor shaft (), a reduction gearbox housing () containing a cog wheel engaged in an endless screw of the shaft and capable of driving an output member (). The invention is characterised in that it comprises means () for eliminating, under predetermined axial compression (F), all axial play between one end () of the rotor shaft and the housing wall (). Said means can comprise a plug () housed in the housing () end () and a piston (), inserted between the plug () and the shaft () end (); the plug () exerts on the piston () and the shaft () the axial thrust () which is adjusted when being mounted, and is axially locked in the corresponding position by melting the housing () plastic material in the grooves or recesses () of the piston () surface, then in solidifying said plastic material. The suppression of axial play in the rotor shaft () eliminates all the disturbing noises caused by changes in rotational direction.