US4270404A
Expired / Lapsed
US
⏱️ 0.0 years remaining
X-Y Movement mechanism
Assignee: Fujifilm Holdings Corp
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Filing: 1979-04-24
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Granted: 1981-06-02
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Expires: 1999-04-24
Abstract
Abstract An X-Y movement mechanism, having right-handed and left-handed lead screws arranged in parallel with each other and drive sources for individually rotating the lead screws. Gears placed over nuts engage the lead screws, the gears having teeth coaxially with said nuts. A base plate, either flat or cylindrical has a stage slidable thereon. A rack is fixedly provided on the stage to engage the gears. The gears operate as a gear transmission mechanism permitting the rack to move in a direction perpendicular to the direction of the axes of the lead screws and in the direction of the axes of the lead screws.
Inventors
- 👤 Makoto Murakoshi
- 👤 Tamotu Yoshizawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:52
CPC Classifications
F; F16; F16H; F16H25/00; F16H25/02; G; G03; G03B; G03B21/00; G03B21/10; G03B21/11; G03B21/115; G03B21/116; F16H25/18; F16H25/20; Y; Y10; Y10S; Y10S248/00; Y10S248/913; Y10T; Y10T74/00; Y10T74/18; Y10T74/18568; Y10T74/18576; Y10T74/18624; Y10T74/188; Y10T74/18808; Y10T74/18816; Y10T74/19; Y10T74/19642; Y10T74/1967; Y10T74/20; Y10T74/20207; Y10T74/20341; Y10T74/20354
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
95 words
An X-Y movement mechanism, comprising a right-handed screw and a left-handed screw arranged in parallel with each other; drive means for individually rotating said lead screws; gear means mounted on said screws; a base plate; a stage movable with respect to said base plate; and a rack fixedly provided on said stage to engage said gear means wherein said gear means operate as a gear transmission mechanism permitting said rack to move in a direction perpendicular to the direction of the axes of said screws or in the direction of the axes of said screws.
Claim 2
Dependent Claim
95 words
An X-Y movement mechanism, comprising a right-handed screw and a left-handed screw arranged in parallel with each other; drive means for individually rotating said lead screws; gear means mounted on said screws; a base plate; a stage movable with respect to said base plate; and a rack fixedly provided on said stage to engage said gear means wherein said gear means operate as a gear transmission mechanism permitting said rack to move in a direction perpendicular to the direction of the axes of said screws or in the direction of the axes of said screws.
Claim 3
Dependent Claim
25 words
The mechanism of claim 1 wherein said base plate is a flat surface in parallel with the plane defined by the axes of said screws.
Claim 4
Dependent Claim
25 words
The mechanism of claim 1 wherein said base plate is a cylindrical surface having an axis of rotation parallel to the axes of said screws.
Claim 5
Dependent Claim
20 words
The mechanism of claim 1, wherein said drive means comprises first and second step motors to individually drive said screws.
Claim 6
Dependent Claim
20 words
The mechanism of claim 1, wherein said drive means comprises first and second servo motors to individually drive said screws.
Claim 7
Dependent Claim
26 words
The mechanism of claim 1 wherein said gear means comprises a nut operably engaging the thread of a screw and a gear mounted about said nut.
Claim 8
Dependent Claim
16 words
The mechanism of claim 6 wherein said gear comprises a double helical gear engaging said rack.
Claim 9
Dependent Claim
20 words
The mechanism of claims 1, 2 or 3 wherein said stage has legs to position it above said base plate.
Claim 10
Dependent Claim
18 words
The mechanism of claim 1 further comprising a centering block to maintain a fixed distance between said screws.
Claim 11
Dependent Claim
35 words
The mechanism of claims 1 or 9 wherein said gear means comprises a pair of nuts mounted on the threads of each screw and a double helical gear mounted on the outside of each nut.
Claim 12
Dependent Claim
22 words
The mechanism of claims 1 or 9 further comprising vibration damping means mounted on said lead screws in contact with said stage.
Claim 13
Dependent Claim
25 words
The mechanism of claim 11 wherein said vibration damping means comprise rubber rings having a diameter substantially equal to the diameter of said gear means.
Claim 14
Dependent Claim
16 words
The mechanism of claims 1, 4, 5, 6 or 9 wherein said screws are lead screws.
References Cited (Backward Citations)
SU194508A1
Cited
US3304552A
Cited
US3555916A
Cited
US3613464A
Cited
DE2124986A1
Cited
US3785316A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-06-01 | 1984-12-01 | 1985-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-01 | 1988-12-01 | 1989-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-06-01 | 1992-12-01 | 1993-06-02 | $7700.00 | Window Closed / Lapsed |