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US 4,744,675 AGranted
Moving mechanism
AssigneeCanon Kabushiki Kaisha
InventorsShigeo Sakino, Mahito Negishi, Koichi Matsushita, Michio Horikoshi, Makoto Higomura
Life of this patent
Estimating the term…
Abstract
A moving mechanism for relatively moving first and second members, the mechanism comprising a first fluid discharging portion provided on the first member, for relatively supporting the second member by use of a static pressure, and a second fluid discharging portion operable to produce a static pressure that is effective to apply, to the first member, a force contributable to prevent any deformation of the first member due to the static pressure caused by the first fluid discharging portion.
Claims3
A movement guiding device, comprising:
- a guiding member having first and second surfaces which are in a back-to-back relation;
- a supporting member extending so as to substantially embrace said guiding member, said supporting member having (i) a third surface opposed to the first surface of said guiding member, (ii) a fourth surface opposed to the second surface of said guiding member and (iii) a fifth surface which is in a back-to-back relation with the fourth surface of said supporting member;
- a stationary member on which said guiding member is fixedly provided, said stationary member having a sixth surface opposed to the fifth surface of said supporting member;
- a first fluid bearing element provided on the third surface of said supporting member opposed to the first surface of said guiding member;
- a second fluid bearing element provided on the fourth surface of said supporting member opposed to the second surface of said guiding member;
- and
- a third fluid bearing element provided on the fifth surface of said supporting member opposed to the sixth surface of said stationary member, said third fluid bearing element being effective to prevent deformation of at least a portion of said supporting member in the neighborhood of the fourth and fifth surfaces thereof due to the effect of said second fluid bearing element.
4 more elements
Dependencies are inferred from the claim text.