US3837231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vibrator for generating directional vibrations
Assignee: Dynapac AB
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Filing: 1973-01-22
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Granted: 1974-09-24
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Expires: 1993-01-22
Abstract
Abstract A vibrator of the type having a pair of bodies rotatable eccentrically about respective mutually parallel axes in opposite directions and gears associated with the eccentrically rotatable bodies meshing to provide coordinated counter-rotation of the bodies is provided with an improved drive arrangement for selectively driving the bodies in rotation in either of two distinct and separate phase relationships. One of the rotatable bodies is rotatable relative to the gear associated with it, and matching abutments on that body and gear are mutually engageable to transmit driving force between them in two different angularly spaced-apart positions of the rotatable body, relative to the associated gear. A belt drive having a shifting mechanism is arranged to transmit rotational power either to the body or the gear of the relatively rotatable body and gear components.
Inventors
- 👤 H Holmlund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:58
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: 7
Claim 1
Independent Claim
171 words
In a vibrator of a type having first and second bodies rotatable eccentrically about respective mutually parallel axes in opposite directions, first and second gears associated with the first and second bodies, respectively, the gears meshing for coordinated counter-rotation of the bodies, and means for driving the bodies in rotation, the improvement of a drive arrangement for selectively driving the bodies in either of two distinct and separate phase positions comprising means mounting the first body for rotation relative to the first gear, an abutment on the first body, an abutment on the first gear, the said abutments being located on the first body and first gear, respectively, for mutual driving engagement to transmit driving force between the first body and first gear in two different angularly spaced-apart positions of the first body relative to the first gear, and means for transmitting rotational power from said drive means selectively either to the first body or to the first gear including a belt transmission and a shifting device in the belt transmission.
Claim 2
Dependent Claim
171 words
In a vibrator of a type having first and second bodies rotatable eccentrically about respective mutually parallel axes in opposite directions, first and second gears associated with the first and second bodies, respectively, the gears meshing for coordinated counter-rotation of the bodies, and means for driving the bodies in rotation, the improvement of a drive arrangement for selectively driving the bodies in either of two distinct and separate phase positions comprising means mounting the first body for rotation relative to the first gear, an abutment on the first body, an abutment on the first gear, the said abutments being located on the first body and first gear, respectively, for mutual driving engagement to transmit driving force between the first body and first gear in two different angularly spaced-apart positions of the first body relative to the first gear, and means for transmitting rotational power from said drive means selectively either to the first body or to the first gear including a belt transmission and a shifting device in the belt transmission.
Claim 3
Dependent Claim
43 words
The improvement according to claim 1 wherein the shifting device includes cooperating friction elements interposed in the paths of power to the respective first body and first gear, one of the elements being shiftable between alternative positions to effect said selective power transmission.
Claim 4
Dependent Claim
61 words
The improvement according to claim 1 wherein the shifting device includes a friction element on each of the first body and first gear and a pulley driven by a belt, the pulley having friction surfaces thereon and being shiftable to move the respective friction surfaces thereof into selective engagement with the friction elements on the respective first body and first gear.
Claim 5
Dependent Claim
64 words
The improvement according to claim 1 wherein the power transmission means includes a first dRive pulley connected to the first body, a second drive pulley connected to the first gear, a first and a second belt received by the respective first and second pulleys, and wherein the shifting device includes a member shiftable to conduct power selectively to the respective first and second belts.
Claim 6
Dependent Claim
51 words
The improvement according to claim 4 wherein the shifting device is a compound adjustable pulley, the shiftable member of which defines a portion of a pulley for each of the first and second belts and is shiftable frictionally to engage one belt and release the other from power transmitting frictional engagement.
Claim 7
Dependent Claim
47 words
The improvement according to claim 4 wherein the shifting device is a belt tensioning system, the movable member of which has first and second portions selectively coacting with the respective first and second belts to impose driving tension on one and release the other from driving tension.
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) | 1977-09-23 | 1978-03-25 | 1978-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-23 | 1982-03-25 | 1982-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-23 | 1986-03-25 | 1986-09-24 | $7700.00 | Window Closed / Lapsed |