Patent US4648723A successfully refreshed from Google Patents.
US4648723A
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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 for precision locating use, which is built in precision working machines, precision measuring instruments, semiconductor manufacturing apparatuses. All the bearing pads which are used in arrangement by two are integrally constructed so as to simplify the assembly adjustment and stabilize, improve the assembling precision.
Inventors
- 👤 Sadao Sugiyama
- 👤 Hiroshi Goto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:28
CPC Classifications
F; F16; F16C; F16C32/00; F16C32/06; B; B23; B23Q; B23Q1/00; B23Q1/25; B23Q1/44; B23Q1/56; B23Q1/60; B23Q1/62; B23Q1/621; F16C29/00; F16C29/02; F16C29/025; F16C2322/00; F16C2322/39
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
A static pressure air surface stage comprising: a base; a first movable guide capable of movement in one linear direction on said base; a second movable guide capable of movement in a second linear direction on said base perpendicular to said first direction; two bearing pads located on each side of said first movable guide, two of the bearing pads located on one side of the first movable guide being integrally formed; and two bearing pads located on each side of said second movable guide, two of the bearing pads located on one side of the second movable guide being integrally formed; wherein the integrally formed bearing pads located on one side of the first movable guide are integrally formed with the integrally formed bearing pads located on one side of the second movable guide.
Claim 2
Dependent Claim
135 words
A static pressure air surface stage comprising: a base; a first movable guide capable of movement in one linear direction on said base; a second movable guide capable of movement in a second linear direction on said base perpendicular to said first direction; two bearing pads located on each side of said first movable guide, two of the bearing pads located on one side of the first movable guide being integrally formed; and two bearing pads located on each side of said second movable guide, two of the bearing pads located on one side of the second movable guide being integrally formed; wherein the integrally formed bearing pads located on one side of the first movable guide are integrally formed with the integrally formed bearing pads located on one side of the second movable guide.
References Cited (Backward Citations)
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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 |