US3906262A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-axis magnetic positioning device
Assignee: Fujitsu Ltd
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Filing: 1974-07-22
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Granted: 1975-09-16
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Expires: 1994-07-22
Abstract
Abstract A device for transferring an object on a horizontal plane in a first direction, in a second direction which crosses the first direction or in any direction between the first and second direction by making use of a pulse operated linear motor is referred to, wherein the device comprises a first member which moves in a first direction, a second member which moves in a second direction and which is located movably on the first member and a third member which is located movably on the second member and moves the object to be transferred.
Inventors
- 👤 Hiromichi Shichida
- 👤 Kenichi Toyoda
- 👤 Seiji Irie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:53
CPC Classifications
B; B23; B23Q; B23Q1/00; B23Q1/25; B23Q1/44; B23Q1/56; B23Q1/60; B23Q1/62; B23Q1/621; H; H02; H02K; H02K41/00; H02K41/02; H02K41/03; B26; B26D; B26D7/00; B26D2007/0012; B26D2007/0043; H02K2201/00; H02K2201/18
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
455 words
A two-axis magnetic positioning device comprised of pulse operated linear motors including: a first member having a first surface; a second member of which the bottom forms a second surface and the top forms a third surface, which can move in a first direction with respect to the first member keeping a small air gap between said first surface and said second surface; a third member having a fourth surface, which can move in a second direction which crosses the first direction with respect to the second member keeping a small air gap between said third surface and said fourth surface; wherein one of the first and second surfaces being provided with a plurality of first teeth made of a magnetic material which are arranged in the first direction with a constant pitch ''''P,'''' and each first tooth extends in a direction which is not parallel to the first direction; the other first surface or second surface comprises N number of first electromagnetic energizing means which drive the second member in the first direction with respect to the first member by electromagnetically cooperating with said first teeth wherein each first electromagnetic energizing means has a plurality of pairs of first driving teeth which are surrounded by exciting coils and are arranged in the first direction with the constant pitch ''''P'''' and each of the first driving teeth extends in the direction in which each first tooth is arranged and further, each of the first driving teeth of one of the first electromagnetic energizing means is shifted by (1/N)P in relation to each of the first driving teeth of the adjacent members of the first electromagnetic energizing means, one of the third and fOurth surfaces being provided with a plurality of second teeth made of a magnetic material which are arranged in the second direction with a constant pitch ''''P'','''' and each second tooth extends in a direction which is not parallel to the second direction; the other of the third surface or the fourth surface comprises N'' number of second electromagnetic energizing means which drive the third member in the second direction with respect to the second member by electromagnetically cooperating with said second teeth wherein each second electromagnetic energizing means has a plurality of pairs of second driving teeth which are surrounded by exciting coils and are arranged in the second direction with the constant pitch ''''P'''''' and each of the second driving teeth extends in the direction in which each second tooth is arranged and further, each of the second driving teeth of one of the second electromagnetic energizing means is shifted by (1/N'')P'' in relation to each of the second driving teeth of the adjacent members of the second electromagnetic energizing means.
Claim 2
Dependent Claim
455 words
A two-axis magnetic positioning device comprised of pulse operated linear motors including: a first member having a first surface; a second member of which the bottom forms a second surface and the top forms a third surface, which can move in a first direction with respect to the first member keeping a small air gap between said first surface and said second surface; a third member having a fourth surface, which can move in a second direction which crosses the first direction with respect to the second member keeping a small air gap between said third surface and said fourth surface; wherein one of the first and second surfaces being provided with a plurality of first teeth made of a magnetic material which are arranged in the first direction with a constant pitch ''''P,'''' and each first tooth extends in a direction which is not parallel to the first direction; the other first surface or second surface comprises N number of first electromagnetic energizing means which drive the second member in the first direction with respect to the first member by electromagnetically cooperating with said first teeth wherein each first electromagnetic energizing means has a plurality of pairs of first driving teeth which are surrounded by exciting coils and are arranged in the first direction with the constant pitch ''''P'''' and each of the first driving teeth extends in the direction in which each first tooth is arranged and further, each of the first driving teeth of one of the first electromagnetic energizing means is shifted by (1/N)P in relation to each of the first driving teeth of the adjacent members of the first electromagnetic energizing means, one of the third and fOurth surfaces being provided with a plurality of second teeth made of a magnetic material which are arranged in the second direction with a constant pitch ''''P'','''' and each second tooth extends in a direction which is not parallel to the second direction; the other of the third surface or the fourth surface comprises N'' number of second electromagnetic energizing means which drive the third member in the second direction with respect to the second member by electromagnetically cooperating with said second teeth wherein each second electromagnetic energizing means has a plurality of pairs of second driving teeth which are surrounded by exciting coils and are arranged in the second direction with the constant pitch ''''P'''''' and each of the second driving teeth extends in the direction in which each second tooth is arranged and further, each of the second driving teeth of one of the second electromagnetic energizing means is shifted by (1/N'')P'' in relation to each of the second driving teeth of the adjacent members of the second electromagnetic energizing means.
Claim 3
Dependent Claim
65 words
A two-axis magnetic positioning device as set forth in claim 1, wherein said first surface comprises a plurality of said first teeth made of a magnetic material, said second surface comprises N number of first electromagnetic energizing means, said third surface comprises N'' number of second electromagnetic energizing means, and said fourth surface comprises a plurality of said second teeth made of a magnetic material.
Claim 4
Dependent Claim
64 words
A two-axis magnetic positioning device as set forth in claim 1, wherein said first surface comprises N number of first electromagnetic energizing means, said second surface comprises a plurality of said first teeth made of a magnetic material, said third surface comprises Nnumber of second electromagnetic energizing means, and said fourth surface comprises a plurality of said second teeth made of a magnetic material.
Claim 5
Dependent Claim
65 words
A two-axis magnetic positioning device as set forth in claim 1, wherein said first surface comprises a plurality of said first teeth made of a magnetic material, said second surface comprises N number of first electromagnetic energizing means, said third surface comprises a plurality of said second teeth made of a magnetic material, and said fourth surface comprises N'' number of second electromagnetic energizing means.
Claim 6
Dependent Claim
65 words
A two-axis magnetic positioning device as set forth in claim 1, wherein said first surface comprises N number of first electromagnetic energizing means, said second surface comprises a plurality of said first teeth made of a magnetic material, said third surface comprises a plurality of said second teeth made of a magnetic material, and said fourth surface comprises N'' number of second electromagnetic energizing means.
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) | 1978-09-15 | 1979-03-17 | 1979-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-15 | 1983-03-17 | 1983-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-15 | 1987-03-17 | 1987-09-16 | $7700.00 | Window Closed / Lapsed |