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:
Sep. 18, 2001
Filed:
Dec. 29, 1999
John M. Ginder, Plymouth, MI (US);
Larry D. Elie, Ypsilanti, MI (US);
Shane A. Harte, Farmington Hills, MI (US);
Vipen Khetarpal, Novi, MI (US);
Alex David Cohen, Oak Park, MI (US);
Visteon Global Technologies, Inc., Dearborn, MI (US);
Abstract
An electromagnetic clutch (,) for an air conditioning compressor includes a generally cylindrical pulley (,) rotatably mounted on a compressor housing (,) and having an annular friction surface (,), a driven member (,) mounted on a compressor shaft (,) and having an annular friction surface (,) positioned radially adjacent the first friction surface to form an annular space (,) therebetween. A quantity of flowable magnetic material (,) is provided in the annular space (,) and a magnetic coil (,) is fixed on the housing adjacent thereto. A control (,′) connected to the magnetic coil (,) supplies electrical power from a power supply (,) to energize the magnetic coil and create magnetic flux in the annular space (,) polarizing the magnetic material and frictionally coupling the first and second friction surfaces (,) to cause the pulley (,) to rotate the driven member (,). The control (,′) can pulse width modulate or ramp the supplied power for “soft” starting and/or stopping of the compressor.