US3722381A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual amplitude vibration generator
Assignee: Dynapac AB
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Filing: 1971-03-04
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Granted: 1973-03-27
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Expires: 1991-03-04
Abstract
Abstract A dual amplitude vibratory mechanism has a pair of eccentric weights mounted on a shaft in such a way that a different amplitude of vibration can be had simply by reversing rotation of the shaft. One of the weights is attached to the shaft and rotatable with it, while the other weight is mounted on the shaft but freely rotatable relative to it. Each weight has a pair of contact surfaces that cooperate with similar surfaces on the other weight, so that when the shaft rotates one of the surfaces on the fixed weight engages the cooperating surface on the free weight, which results in both weights revolving as a single composite eccentric weight, thereby causing the shaft to vibrate. When the shaft rotation is reversed, the other surface on the fixed weight engages its cooperating surface on the free weight, and the weights revolve in that direction as a single composite eccentric weight. The weights are shaped and dimensioned such that they have a combined center of gravity relative to the shaft when one set of surfaces engage each other that is different from the center of gravity when the other surfaces are in engagement, thereby resulting in a different amplitude of vibration when rotation of the shaft is reversed.
Inventors
- 👤 E Tuneblom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:42
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; B06B1/164; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18544; Y10T74/18552
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
302 words
A dual amplitude vibration generator comprising a shaft, first and second eccentric weights, first mounting means attaching the first weight to the shaft so that it is rotatable with the shaft, second mounting means rotatably mounting the second weight on the shaft so that it is rotatable relative to the first weight through at least a portion of one revolution, the second mounting means including a pair of mounting rings to which the second weight is attached, the shaft passing through the rings and one of the rings being disposed on either side of the first weight for preventing the second weight from moving axially along the shaft, and drive means for selectively rotating said first weight in opposite directions, the drive means including a coupling to the shaft, a pair of contact surfaces on each of said weights, one contact surface on the first weight cooperating with and engaging one contact surface on the second weight when said first weight is rotated by the drive means in one direction to rotate both the weights in said one direction, said two weights when rotating in said one direction forming a first composite eccentric weight having a center of gravity at a first distance from the shaft, and the other contact surface on the first weight cooperating with and engaging the other contact surface on the second weight when said first weight is rotated by the drive means in the opposite direction to rotate both the weights in said opposite direction, said two weights when rotating in said opposite direction forming a second composite eccentric weight having a center of gravity at a second distance from the shaft, whereby the amplitude of vibrations generated by rotation of the composite weights can be changed by reversing the direction of rotation of said first weight.
Claim 2
Dependent Claim
302 words
A dual amplitude vibration generator comprising a shaft, first and second eccentric weights, first mounting means attaching the first weight to the shaft so that it is rotatable with the shaft, second mounting means rotatably mounting the second weight on the shaft so that it is rotatable relative to the first weight through at least a portion of one revolution, the second mounting means including a pair of mounting rings to which the second weight is attached, the shaft passing through the rings and one of the rings being disposed on either side of the first weight for preventing the second weight from moving axially along the shaft, and drive means for selectively rotating said first weight in opposite directions, the drive means including a coupling to the shaft, a pair of contact surfaces on each of said weights, one contact surface on the first weight cooperating with and engaging one contact surface on the second weight when said first weight is rotated by the drive means in one direction to rotate both the weights in said one direction, said two weights when rotating in said one direction forming a first composite eccentric weight having a center of gravity at a first distance from the shaft, and the other contact surface on the first weight cooperating with and engaging the other contact surface on the second weight when said first weight is rotated by the drive means in the opposite direction to rotate both the weights in said opposite direction, said two weights when rotating in said opposite direction forming a second composite eccentric weight having a center of gravity at a second distance from the shaft, whereby the amplitude of vibrations generated by rotation of the composite weights can be changed by reversing the direction of rotation of said first weight.
Claim 3
Dependent Claim
362 words
In a vibratory compactor of the type that has a roller journaled in a housing, the roller engaging and rolling along a surface to be compacted a shaft mounted in the roller, an eccentric weight means mounted on the shaft, and means for rotating the weight so that a vibratory motion is imparted through the shaft to the roller, the improvement comprising said shaft, said weight means comprising first and second eccentric weights, first mounting means attaching the first weight to the shaft so that it is rotatable with the shaft, second mounting means rotatably mounting the second weight on the shaft so that it is rotatable relative to the first weight through at least a portion of one revolution, the second mounting means including a pair of mounting rings to which the second weight is attached, the shaft passing through the rings and one of the rings being disposed on either side of the first weight for preventing the second weight from moving axially along the shaft, and drive means for selectively rotating said first weight in opposite directions, the drive means including a coupling to the shaft, a pair of contact surfaces on each of said weights, one contact surface on the first weight coopeRating with and engaging one contact surface on the second weight when said first weight is rotated by the drive means in one direction to rotate both the weights in said one direction, said two weights when rotating in said one direction forming a first composite eccentric weight having a center of gravity at a first distance from the shaft, and the other contact surface on the first weight cooperating with and engaging the other contact surface on the second weight when said first weight is rotated by the drive means in the opposite direction to rotate both the weights in said opposite direction, said two weights when rotating in said opposite direction forming a second composite eccentric weight having a center of gravity at a second distance from the shaft, whereby the amplitude of vibrations generated by rotation of the composite weights can be changed by reversing the direction of rotation of said first weight.
Claim 4
Dependent Claim
362 words
In a vibratory compactor of the type that has a roller journaled in a housing, the roller engaging and rolling along a surface to be compacted a shaft mounted in the roller, an eccentric weight means mounted on the shaft, and means for rotating the weight so that a vibratory motion is imparted through the shaft to the roller, the improvement comprising said shaft, said weight means comprising first and second eccentric weights, first mounting means attaching the first weight to the shaft so that it is rotatable with the shaft, second mounting means rotatably mounting the second weight on the shaft so that it is rotatable relative to the first weight through at least a portion of one revolution, the second mounting means including a pair of mounting rings to which the second weight is attached, the shaft passing through the rings and one of the rings being disposed on either side of the first weight for preventing the second weight from moving axially along the shaft, and drive means for selectively rotating said first weight in opposite directions, the drive means including a coupling to the shaft, a pair of contact surfaces on each of said weights, one contact surface on the first weight coopeRating with and engaging one contact surface on the second weight when said first weight is rotated by the drive means in one direction to rotate both the weights in said one direction, said two weights when rotating in said one direction forming a first composite eccentric weight having a center of gravity at a first distance from the shaft, and the other contact surface on the first weight cooperating with and engaging the other contact surface on the second weight when said first weight is rotated by the drive means in the opposite direction to rotate both the weights in said opposite direction, said two weights when rotating in said opposite direction forming a second composite eccentric weight having a center of gravity at a second distance from the shaft, whereby the amplitude of vibrations generated by rotation of the composite weights can be changed by reversing the direction of rotation of said first weight.
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) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |