Hydrostatic bearing component
AssigneeCanon Kabushiki Kaisha
InventorHironori Yamamoto
Life of this patent
Estimating the term…
Abstract
A hydrostatic bearing component for reserving pressurized fluid in its one portion facing the surface of a supporting member. The component is provided with a recess to serve as a passage for the pressurized fluid, an orifice open to the recess, and a pressure supply communicating to the orifice, a ratio (.beta.) of a clearance C.sub.s between the surface of the bearing component and the supporting surface to a clearance C.sub.R between the bottom surface of the recess and the supporting surface .beta.=C.sub.s /C.sub.R being set in a range between 0.2 and 0.7.
Claims7
Hydrostatic bearing component, comprising first and second relatively movable members, said first movable member having a recess defined therein by stepped means at a side facing said second member, at least one orifice open to said recess, and a pressure supply communicating with said orifice, a ratio (.beta.) of a gap C.sub.s between said stepped means and said second member to a gap C.sub.R between the bottom surface of said recess and said second member (.beta.=C.sub.s /C.sub.R) being in a range of between 0.2 and 0.7 when pressurized fluid is supplied to said pressure supply, and wherein a value .lambda. defined by (ln D.sub.a /D.sub.s)/(ln D.sub.s /D.sub.i), where D.sub.a is a diameter of said first member, D.sub.s is a diameter of said recess, and D.sub.i is a diameter of said orifice, is in a range of between 0.02 and 0.06.
Hydrostatic sliding device comprising:
- (a) first means having a plurality of flat supporting planes extending in one direction;
- and
- (b) second means provided with at least one hydrostatic bearing component facing each of said supporting planes,
- said each component having a recess continuously enclosed by a stepped part, at least one orifice open to said recess, and a pressure supply communication with said orifice, a value .lambda. defined by (ln D.sub.a /D.sub.s)/(ln D.sub.s /D.sub.i), where D.sub.a is a diameter of said component, D.sub.s is a diameter of said recess, and D.sub.i is a diameter of said orifice, is in a range of between 0.02 and 0.06.
Dependencies are inferred from the claim text.