US4084445A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Contra-rotating vibrator
Assignee: Individual
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Filing: 1975-12-11
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Granted: 1978-04-18
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Expires: 1995-12-11
Abstract
Abstract A device for producing linear vibratory motion includes, in the preferred embodiment, an electric motor of the contra-rotating type, i.e. one in which both the rotor and stator rotate about a common axis and in opposite directions. One or more pairs of eccentric weights are provided, one weight of each pair rotating with the rotor and the other with the stator. Gearing is provided to assure synchronized rotation of the rotor and stator and to determine the angle of the plane in which the weights are aligned and, hence, the plane along which the vibratory motion is directed.
Inventors
- 👤 Arthur F. Erwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:06
CPC Classifications
B; B06; B06B; B06B1/00; B06B1/10; B06B1/16; B06B1/161; B06B1/166; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/18344
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
113 words
A device for producing vibratory motion, comprising: a frame; a motor carried by said frame comprising first and second members which impose reactive forces on one another and which rotate in opposite directions about a common axis in response to said forces; a first weight connected to and rotating about said common axis with said first member, the center of gravity of said first weight being offset from said common axis; and a second weight connected to and rotating about said common axis with said second member, the center of gravity of said second weight being offset from said common axis, said second weight rotating in the opposite direction from said first weight.
Claim 2
Independent Claim
113 words
A device for producing vibratory motion, comprising: a frame; a motor carried by said frame comprising first and second members which impose reactive forces on one another and which rotate in opposite directions about a common axis in response to said forces; a first weight connected to and rotating about said common axis with said first member, the center of gravity of said first weight being offset from said common axis; and a second weight connected to and rotating about said common axis with said second member, the center of gravity of said second weight being offset from said common axis, said second weight rotating in the opposite direction from said first weight.
Claim 3
Dependent Claim
28 words
The device of claim 1 further including gearing interconnecting said first and second members whereby said members rotate in opposite directions to one another at uniform angular velocities.
Claim 4
Dependent Claim
98 words
The device of claim 2 wherein said first member includes a shaft journalled on said frame, the axis of said shaft being coincident with said common axis, said gearing including a first bevel gear carried by and rotating with said shaft, a second bevel gear carried by and rotating with said second member, a third bevel gear in meshing engagement with said first and second bevel gears, and a carrier for said third bevel gear, said carrier being connected to said frame and journalling said third bevel gear for rotation about an axis perpendicular to said common axis.
Claim 5
Dependent Claim
17 words
The device of claim 3 further including means for controllably rotating said carrier about said common axis.
Claim 6
Dependent Claim
12 words
The device of claim 1 wherein said motor is a hydraulic motor.
Claim 7
Dependent Claim
12 words
The device of claim 1 wherein said motor is an electric motor.
Claim 8
Dependent Claim
46 words
The device of claim 1 further including a third weight connected to and rotating with said first member and a fourth weight connected to and rotating with said second member, the centers of gravity of said third and fourth weights being offset from said common axis.
Claim 9
Dependent Claim
48 words
The device of claim 7 wherein said third and fourth weights are in reverse succession from said first and second weights whereby the turning moment generated by said first and second weights perpendicular to said common axis opposes the turning moment generated by said third and fourth weights.
Claim 10
Independent Claim
135 words
A device for producing vibratory motion, comprising: a housing having spaced end walls; an electric motor mounted within said housing, said motor having a rotor, a rotor shaft journalled on said end walls, a stator, a stator frame journalled for rotation about said rotor shaft whereby said rotor and stator rotate in opposite directions about a common axis of rotation; a first weight connected to and rotating about said axis of rotation with said rotor shaft, the center of gravity of said first weight being offset from said axis of rotation; and a second weight connected to and rotating about said axis of rotation with said stator frame, the center of gravity of said second weight being offset from said axis of rotation, said second weight rotating in the opposite direction from said first weight.
Claim 11
Independent Claim
135 words
A device for producing vibratory motion, comprising: a housing having spaced end walls; an electric motor mounted within said housing, said motor having a rotor, a rotor shaft journalled on said end walls, a stator, a stator frame journalled for rotation about said rotor shaft whereby said rotor and stator rotate in opposite directions about a common axis of rotation; a first weight connected to and rotating about said axis of rotation with said rotor shaft, the center of gravity of said first weight being offset from said axis of rotation; and a second weight connected to and rotating about said axis of rotation with said stator frame, the center of gravity of said second weight being offset from said axis of rotation, said second weight rotating in the opposite direction from said first weight.
Claim 12
Dependent Claim
18 words
The device of claim 9 further including gearing interconnecting said rotor and stator to assure synchronized rotation thereof.
Claim 13
Dependent Claim
75 words
The device of claim 10 wherein said gearing includes a first bevel gear carried by and rotating with said rotor shaft, a second bevel gear journalled on said rotor shaft and rotating with said stator frame, a third bevel gear in meshing engagement with said first and second bevel gears, and a carrier for said third bevel gear, said carrier journalling said third bevel gear for rotation about an axis perpendicular to said common axis.
Claim 14
Dependent Claim
17 words
The device of claim 11 further including means for controllably rotating said carrier about said common axis.
Claim 15
Dependent Claim
72 words
The device of claim 11 wherein said housing includes a cylindrical casing extending between and connected to said end walls, said carrier includes a cylindrical sleeve having an external diameter slightly less than the internal diameter of said casing and located within said casing adjacent one of said end walls, and said carrier further includes a stub shaft carried by said sleeve extending radially inwardly therefrom and journalling said third bevel gear.
Claim 16
Dependent Claim
17 words
The device of claim 13 further including means to controllably rotate said carrier about said common axis.
Claim 17
Dependent Claim
46 words
The device of claim 14 wherein said last mentioned means includes a ring gear segment affixed to said sleeve, a spur gear meshing with said ring gear segment, and a shaft keyed to said spur gear and extending through said adjacent one of said end walls.
Claim 18
Dependent Claim
47 words
The device of claim 9 further including a third weight connected to and rotating with said rotor shaft and a fourth weight connected to and rotating with said stator frame, the centers of gravity of said third and fourth weights being offset from said axis of rotation.
Claim 19
Dependent Claim
49 words
The device of claim 16 wherein said third and fourth weights are in reverse succession from said first and second weights whereby the turning moment generated by said first and second weights perpendicular to said axis of rotation opposes the turning moment generated by said third and fourth weights.
Claim 20
Independent Claim
190 words
A device for producing vibratory motion, comprising: a frame; first and second shafts journalled in said frame for rotation about a common axis; a first weight connected to and rotating with said first shaft, the center of gravity of said first weight being offset from said common axis; a second weight connected to and rotating with said second shaft, the center of gravity of said second weight being offset from said common axis; a first bevel gear connected to and rotating with said first shaft; a second bevel gear connected to and rotating with said second shaft, said first and second bevel gears rotating about a common axis; a third bevel gear in meshing engagement with said first and second bevel gears a carrier for said third bevel gear, said carrier including a third shaft the axis of which is perpendicular to said common axis of said first and second bevel gears and on which said third bevel gear is mounted, said carrier being controllably rotatable about said common axis of said first and second bevel gears; and a motor connected to one of said shafts to effect rotation thereof.
Claim 21
Independent Claim
190 words
A device for producing vibratory motion, comprising: a frame; first and second shafts journalled in said frame for rotation about a common axis; a first weight connected to and rotating with said first shaft, the center of gravity of said first weight being offset from said common axis; a second weight connected to and rotating with said second shaft, the center of gravity of said second weight being offset from said common axis; a first bevel gear connected to and rotating with said first shaft; a second bevel gear connected to and rotating with said second shaft, said first and second bevel gears rotating about a common axis; a third bevel gear in meshing engagement with said first and second bevel gears a carrier for said third bevel gear, said carrier including a third shaft the axis of which is perpendicular to said common axis of said first and second bevel gears and on which said third bevel gear is mounted, said carrier being controllably rotatable about said common axis of said first and second bevel gears; and a motor connected to one of said shafts to effect rotation thereof.
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) | 1981-04-17 | 1981-10-17 | 1982-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-17 | 1985-10-17 | 1986-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-17 | 1989-10-17 | 1990-04-18 | $7700.00 | Window Closed / Lapsed |