Patent US4648724A successfully refreshed from Google Patents.
US4648724A
Expired / Lapsed
US
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Static pressure air surface stage
Assignee: Omron Corp
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Filing: 1985-07-18
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Granted: 1987-03-10
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Expires: 2005-07-18
Abstract
Abstract A static pressure air surface stage which is adapted to control to the utmost the deflection of the movable guide caused by the reaction forces of the bearing to ensure the stable provision of the better stage run precision. The bearing pads of the movable guides are oppositely disposed by a pair on both side faces of the stationary guides.
Inventors
- 👤 Sadao Sugiyama
- 👤 Hiroshi Goto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:20
CPC Classifications
F; F16; F16C; F16C32/00; F16C32/06; F16C29/00; F16C29/02; F16C29/025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
A static pressure air surface stage comprising: a surface plate; stationary guides fixedly mounted on the surface plate, each stationary guide having two opposed substantially vertical faces; and a stage slideably mounted on movable guides, each of said movable guides having a pair of bearing pads fixedly attached to at least one end thereof; wherein one pad of each pair of bearing pads is diametrically disposed to the other pad of said pair on said opposed faces of one of said stationary guides.
Claim 2
Dependent Claim
83 words
A static pressure air surface stage comprising: a surface plate; stationary guides fixedly mounted on the surface plate, each stationary guide having two opposed substantially vertical faces; and a stage slideably mounted on movable guides, each of said movable guides having a pair of bearing pads fixedly attached to at least one end thereof; wherein one pad of each pair of bearing pads is diametrically disposed to the other pad of said pair on said opposed faces of one of said stationary guides.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-03-09 | 1990-09-08 | 1991-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-09 | 1994-09-08 | 1995-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-09 | 1998-09-08 | 1999-03-10 | $7700.00 | Window Closed / Lapsed |