Hydraulic bearing with magnetic seal

Details Hydraulic bearing with magnetic seal Hydraulic bearing with magnetic seal

G - Physics

11

B

352/30

G11B 21/16 (2006.01) G11B 5/53 (2006.01)

Patent

CA 1129546

ABSTRACT OF THE DISCLOSURE A rotary head assembly having a central stationary shaft one end of which is securely joined to a lower housing, a bearing spacer securely fitted over the stationary shaft at the other end thereof and a rotary sleeve disposed for rotation about the common axis of the stationary shaft and the bearing spacer, whereby a hydraulic bearing is defined by the bearing spacer, the rotary sleeve and a lubricant filled into the space between the bearing spacer and the rotary sleeve, and a hydraulic passage is defined between the stationary shaft and the rotary sleeve. The lower end of the lubricant passage is provided with a magnetic sealing means which seals a magnetic liquid so as to prevent the leakage to the exterior of the magnetic liquid or the lubricant. An upper cylinder which carries one or more video signal recording and reproducing heads is removably mounted on the rotary sleeve. - 1 -

333840

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