US3584249A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric vibrator
Assignee: Individual
•
Filing: 1970-03-11
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Granted: 1971-06-08
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Expires: 1990-03-11
Abstract
Abstract An electric motor having a stator and a rotor with the stator affixed to the device to be vibrated and the rotor having a portion of the electromagnetic circuitry eliminated and nonmagnetic material, such as lead, affixed thereto to mechanically counteract the unbalanced lateral magnetic forces of the electromagnetic circuitry of the rotor at operating speeds. Thus, the rotor runs smoothly in the bearings while the unbalanced electromechanical circuitry produces vibration of the stator.
Inventors
- 👤 David M Murphy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:10
CPC Classifications
H; H02; H02K; H02K7/00; H02K7/04; H02K17/00; H02K17/02; H02K17/16; H02K17/168; H02K7/06; H02K7/061; H02K7/063
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
96 words
An electric vibrator comprising: a. an electric motor having a stator and a rotor with coacting electromagnetic circuitry therein; b. the electromagnetic circuitry of the rotor encompassing substantially less than 360* thereof for producing an unbalance in lateral magnetic force exerted by the electromagnetic circuitry of the motor in each rotation of the rotor; c. means having a predetermined mass affixed to the rotor for centrifugally counterbalancing the lateral magnetic force unbalance and producing substantially smooth rotation of the rotor within the stator; and d. said unbalanced lateral magnetic force producing vibration of said electric motor.
Claim 2
Dependent Claim
96 words
An electric vibrator comprising: a. an electric motor having a stator and a rotor with coacting electromagnetic circuitry therein; b. the electromagnetic circuitry of the rotor encompassing substantially less than 360* thereof for producing an unbalance in lateral magnetic force exerted by the electromagnetic circuitry of the motor in each rotation of the rotor; c. means having a predetermined mass affixed to the rotor for centrifugally counterbalancing the lateral magnetic force unbalance and producing substantially smooth rotation of the rotor within the stator; and d. said unbalanced lateral magnetic force producing vibration of said electric motor.
Claim 3
Dependent Claim
17 words
An electric vibrator as set forth in claim 1 wherein the electric motor is an induction type.
Claim 4
Dependent Claim
36 words
An electric vibrator as set forth in claim 2 wherein the means having a predetermined mass includes a nonmagnetic material defining a substantially arcuate section of said rotor within which the electromagnetic circuitry is substantially excluded.
Claim 5
Dependent Claim
35 words
An electric vibrator as set forth in claim 1 wherein the electromagnetic circuitry is eliminated from an arcuate section of said rotor encompassing approximately 180* and the arcuate section is defined by a nonmagnetic material.
Claim 6
Dependent Claim
15 words
An electric vibrator as set forth in claim 4 wherein the nonmagnetic material includes lead.
References Cited (Backward Citations)
US3361130A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |