Patent US3670631A successfully refreshed from Google Patents.
US3670631A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotating vibrator
Assignee: Doosan Bobcat North America Inc
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Filing: 1970-12-28
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Granted: 1972-06-20
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Expires: 1990-12-28
Abstract
Abstract A vibrator has two rotating eccentric masses which are interlocked to operate at the same speed. The eccentric masses are arranged so that one is movable circumferentially during rotation relative to the other to change between a vibrating condition and a non-vibrating condition. Two individual motors may be utilized to drive the eccentric masses, and means are provided for changing the relative torque outputs of the motors to shift one eccentric mass relative to the other to change between the vibrating condition and the non-vibrating condition.
Inventors
- 👤 Richard P Gaylord
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:07
CPC Classifications
E; E01; E01C; E01C19/00; E01C19/22; E01C19/23; E01C19/28; E01C19/286; B; B06; B06B; B06B1/00; B06B1/10; B06B1/16; B06B1/161; B06B1/162; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/18344
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
74 words
A vibrator having two rotatable eccentrics which are interlocked to operate at the same speed, the eccentrics being arranged so that they are movable circumferentially relative to each other during rotation to change the location of the center of mass and thereby the amount of vibration, separate means driving the said eccentrics respectively, and means for changing during rotation the driving force of one of the said separate driving means relative to the other.
Claim 2
Dependent Claim
74 words
A vibrator having two rotatable eccentrics which are interlocked to operate at the same speed, the eccentrics being arranged so that they are movable circumferentially relative to each other during rotation to change the location of the center of mass and thereby the amount of vibration, separate means driving the said eccentrics respectively, and means for changing during rotation the driving force of one of the said separate driving means relative to the other.
Claim 3
Dependent Claim
36 words
A vibrator as specified in claim 1 in which one of the said eccentrics is in the form of a housing which houses the other said eccentric and the said eccentrics rotate in the same direction.
Claim 4
Dependent Claim
33 words
A vibrator as specified in claim 2 in which there is an inward projection from the said housing which abuts the inner eccentric and permits approximately 180* relative movement between the two eccentrics.
Claim 5
Dependent Claim
36 words
A vibrator as specified in claim 1 in which the said separate driving means are two hydraulic motors, and including means for causing either of the said motors selectively to exert more torque than the other.
Claim 6
Dependent Claim
59 words
A vibrator as specified in claim 4 which includes a single source of pressurized fluid for the two hydraulic motors, a flow divider for dividing the flow from such source approximately equally between the motors, and a valve arranged in parallel with one of the flow dividers which when it is opened unbalances the fluid flow through the motors.
Claim 7
Dependent Claim
135 words
A vibratory compactor comprising a horizontally disposed cylindrical roller containing two rotatable eccentrics which are interlocked to operate at the same speed, the eccentrics being arranged so that one eccentric is movable during rotation of the eccentrics circumferentially approximately 180* relative to the other to change between a condition in which the offset masses of the eccentrics are additive at least in part and vibration of the roller is produced and a condition in which the offset masses at least partially counteract each other and there is less or no vibration, two motors located respectively adjacent the opposite ends of the roller and connected respectively for driving the said eccentrics, and means for changing the relative driving forces of the said motors to move the said one eccentric to achieve the desired amount of vibration.
Claim 8
Dependent Claim
135 words
A vibratory compactor comprising a horizontally disposed cylindrical roller containing two rotatable eccentrics which are interlocked to operate at the same speed, the eccentrics being arranged so that one eccentric is movable during rotation of the eccentrics circumferentially approximately 180* relative to the other to change between a condition in which the offset masses of the eccentrics are additive at least in part and vibration of the roller is produced and a condition in which the offset masses at least partially counteract each other and there is less or no vibration, two motors located respectively adjacent the opposite ends of the roller and connected respectively for driving the said eccentrics, and means for changing the relative driving forces of the said motors to move the said one eccentric to achieve the desired amount of vibration.
Claim 9
Dependent Claim
61 words
A vibratory compactor as specified in claim 6 having a second pair of rotating eccentrics, each of the said pairs of eccentrics including an outer eccentric and an inner eccentric, the two outer eccentrics being connected together and driven by one of the said motors, and the two inner eccentrics connected together and driven by the other of the said motors.
References Cited (Backward Citations)
US3192839A
Cited
US3262329A
Cited
US3385119A
Cited
US3505885A
Cited
US3498601A
Cited
US3543656A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |