Patent US4555645A successfully refreshed from Google Patents.
US4555645A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Moveable coil linear motor
Assignee: SNYDER LABORATORIES Inc 200 W OHIO AVE A DE CORP
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Filing: 1984-02-21
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Granted: 1985-11-26
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Expires: 2004-02-21
Abstract
Abstract A linear motor comprising a moveable coil, a stationary core in which the coil moves, and a drive member including a shaft and a bearing, the shaft moveable in the bearing and passing through the core. In the preferred embodiment, the drive member includes a pair of circular plates connected by three shafts that slide in bearings passing through the motor core, with the coil attached to the periphery of one of the plates. Springs having varying coil spacing are seated between the plates and the motor core to damp the motor's motion, with the strongest damping at the ends of its reciprocating stroke.
Inventors
- 👤 Robert W. Atkinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:02
CPC Classifications
H; H02; H02K; H02K33/00; H02K33/18
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
144 words
An alternating current linear motor comprising: a coil support; a moveable coil attached to said coil support; a stationary core including a bearing; and a drive member spaced from said coil and connected to said coil support, said drive member comprising a shaft, said shaft being moveable in said bearing and passing through the core, said coil support being connected to said shaft at a first location on one side of said core, said shaft being connected with a device to be powered by said motor at a second location on the opposite side of said core, and said moveable coil and said coil support remaining spaced from the opposite side of said bore so as to be compactly arranged on the one side of said core, and said stationary core defining a slot surrounding said bearing to movably receive said moveable coil therein.
Claim 2
Dependent Claim
144 words
An alternating current linear motor comprising: a coil support; a moveable coil attached to said coil support; a stationary core including a bearing; and a drive member spaced from said coil and connected to said coil support, said drive member comprising a shaft, said shaft being moveable in said bearing and passing through the core, said coil support being connected to said shaft at a first location on one side of said core, said shaft being connected with a device to be powered by said motor at a second location on the opposite side of said core, and said moveable coil and said coil support remaining spaced from the opposite side of said bore so as to be compactly arranged on the one side of said core, and said stationary core defining a slot surrounding said bearing to movably receive said moveable coil therein.
Claim 3
Dependent Claim
13 words
The motor of claim 1 wherein there are three shafts and three bearings.
Claim 4
Dependent Claim
61 words
The motor of claim 2 wherein said drive member further comprises; a first connecting member to whcih said coil and one end of each of said shafts are connected; a second connecting member to which the other end of said shafts are connected; and said shafts and said bearings being spaced apart along a circle about the axis of said coil.
Claim 5
Dependent Claim
49 words
The motor of claim 3 and further comprising a pair of coil springs having varying coil spacing, one spring of each pair extending between said first connecting member and said motor core, and the other spring of each pair extending between said second connecting member and said motor core.
Claim 6
Dependent Claim
53 words
The motor of claim 1 and further comprising a means for variably damping the motion of said coil, said means providing minimum damping when the coil is positioned at the center of its reciprocating path and providing maximum damping when the coil is located at the end of its stroke in either direction.
Claim 7
Dependent Claim
20 words
The motor of claim 5 wherein said means for damping comprises at least one coil spring having varying coil spacing.
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) | 1988-11-25 | 1989-05-27 | 1989-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-25 | 1993-05-27 | 1993-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-25 | 1997-05-27 | 1997-11-26 | $7700.00 | Window Closed / Lapsed |