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:
Mar. 12, 1991
Filed:
Sep. 07, 1989
James L King, Troy, OH (US);
Robert E Lykes, Troy, OH (US);
A. O. Smith Corporation, Milwaukee, WI (US);
Abstract
A motor includes an enclosed rotor unit closely fitted and secured to a stator core unit and having extended integrated bearing units therein for rotatably supporting of the rotor unit and forming a self-contained frameless motor. The motor unit is rotatably mounted in an outer thin wall tube. The ends of the tube member are closed by bearing members having appropriate annular rotary bearings secured therein with the rotor shaft journaled in the bearings to define a frameless motor. The thin metal is formed of non-magnetic metal and has an outside diameter slightly greater than the inside diameter of the stator core. The tube is press fitted into the stator bore and forms the sole support for the metal tube. The tube is longer than the stator and rotor cores with the bearing end plate secured within each end of the metal tubes. In assembly, the rotor unit with the end bearing plates coupled to the rotor shaft can be preassembled and assembled into the metal tube and press fitted as a unit into the stator core. Alternately, the assembly can be press fitted in place with securement of the end plates and rotor unit with the tube before or after the press fitting.