Patent ID: 6190134
Filing Date: 2001-02-20
Classification: F04D

Abstract:
An apparatus for attaching the hub of a fan to the shaft of a motor wherein the hub is formed of plastic material and comprises a center plate having an inner side and an outer side with a central aperture for receiving an end of the shaft, comprising:a threaded aperture formed into said end of said shaft, at least one planar surface formed on the side of said shaft and extending from said end of said shaft, and an annular slot formed in said shaft around the periphery thereof at a position spaced from said end of said shaft and from said planar surface,a retaining ring located in said annular slot,a thrust washer located around said shaft against said retaining ring,said shaft extending through said central aperture of said center plate of said hub with said planar surface of said shaft extending beyond said outer side of said center plate and with said center plate of said hub engaging said thrust washer,a plurality of bosses formed on said outer side of said center plate around said central aperture,a torque washer having a central washer aperture formed therethrough with a shape conforming to the shape of said end of said shaft for receiving said end of said shaft with said end of said shaft extending beyond said outer side of said center plate of said hub,a threaded member having a head and a threaded shaft with said threaded shaft screwed into said threaded aperture of said shaft and said head engaging said torque washer,said torque washer having a plurality of apertures formed therethrough radially outward from and around said central washer aperture for receiving said bosses.