US3722380A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vibrating roller earth compactor
Assignee: Individual
•
Filing: 1970-12-15
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Granted: 1973-03-27
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Expires: 1990-12-15
Abstract
Abstract An earth compactor of the roller type having first and second rollers one behind the other in the direction of travel of the compactor, a vibrator for vibrating the first roller at a first frequency, and a vibrator for vibrating the second roller at a second frequency. The vibrators take the form of eccentrically mounted weights on shafts rotatable at different speeds along the axes of the respective rollers. In one embodiment the eccentric weights and the rollers each have the same size and mass. In another embodiment the slower rotating eccentric weights have a greater mass than the more rapidly rotating weights. In an additional embodiment, the slower rotating heavier weights vibrate a roller of greater mass than the roller vibrated by the smaller mass faster rotating weight. The rollers are mounted on a rigid frame for rotation and the effect of vibrating the rollers with vibrators operating at different constant frequencies is to vibrationally impact the rollers against the ground in a band of frequencies to insure uniform compaction of the ground regardless of variations in consistency of the earth to be compacted.
Inventors
- 👤 B Kaltenegger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:18
CPC Classifications
E; E01; E01C; E01C19/00; E01C19/22; E01C19/23; E01C19/28; E01C19/282; E01C19/283
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
219 words
A roller type earth compactor comprising a. a rigid frame, b. a first roller journalled on said frame for rotation, c. a second roller journalled on said frame for rotation and disposed behind the first roller in the direction of travel of the earth compactor, d. a first shaft and a first unbalanced weight mounted on said first shaft and rotatable about the axis of said first roller for producing vibration, e. a second shaft and a second unbalanced weight mounted on said second shaft and rotatable about the axis of said second roller for producing vibration, f. first and second pulleys operatively connected to said first and second shafts respectively, said second pulley have a greater diameter than said first pulley, g. motor means mounted on said frame, and h. belt means connecting said motor means and pulleys, i. whereby said first weight is driven at a first rate to generate a first frequency of vibration and said second weight is driven at a second rate slower than said first rate to generate a second frequency of vibration less than said first frequency of vibration, and said first and second rollers vibrate at varying frequencies in a reoccurring pattern from a frequency above to a frequency below said frequencies of vibration of said first and second rates respectively.
Claim 2
Dependent Claim
219 words
A roller type earth compactor comprising a. a rigid frame, b. a first roller journalled on said frame for rotation, c. a second roller journalled on said frame for rotation and disposed behind the first roller in the direction of travel of the earth compactor, d. a first shaft and a first unbalanced weight mounted on said first shaft and rotatable about the axis of said first roller for producing vibration, e. a second shaft and a second unbalanced weight mounted on said second shaft and rotatable about the axis of said second roller for producing vibration, f. first and second pulleys operatively connected to said first and second shafts respectively, said second pulley have a greater diameter than said first pulley, g. motor means mounted on said frame, and h. belt means connecting said motor means and pulleys, i. whereby said first weight is driven at a first rate to generate a first frequency of vibration and said second weight is driven at a second rate slower than said first rate to generate a second frequency of vibration less than said first frequency of vibration, and said first and second rollers vibrate at varying frequencies in a reoccurring pattern from a frequency above to a frequency below said frequencies of vibration of said first and second rates respectively.
Claim 3
Dependent Claim
55 words
A roller type compactor according to claim 1 wherein the relative diameters of said first and second pulleys are such that said first and second weights rotate at rates relative to each other whereby said first weight vibrates at a frequency which is an integer multiple of the frequency of vibration of said second weight.
Claim 4
Dependent Claim
45 words
A roller type compactor according to claim 2 wherein the relative diameters of said first and second pulleys are such that said first and second weights are driven synchronously at different speeds with the rotational positions of said weights displaced 90* relative to each other.
Claim 5
Dependent Claim
69 words
A roller type compactor according to claim 2 wherein said first and second weights are rotated and positioned relative to each other such that both weights occupy a top vertical position simultaneously at least once during several complete revolutions of said first weight, whereby an upwardly directed force simultaneously acts on both said first and second rollers to provide an unweighting action facilitating steering movement of the compacting machine.
Claim 6
Dependent Claim
45 words
A roller type compactor according to claim 4 wherein said weights initially occupy a top vertical position, and said driving means is adapted to rotate said first weight at a speed which is twice the speed at which said driving means rotates said second weight.
Claim 7
Dependent Claim
33 words
A roller type compactor according to claim 1 wherein said belt means comprises a belt extending between said pulleys and a further belt extending between said motor means and one of said pulleys.
Claim 8
Dependent Claim
28 words
A roller type compactor according to claim 1 further comprising transmission means operatively connecting said motor means to said first and second rollers to propel said earth compactor.
Claim 9
Dependent Claim
35 words
A roller type compactor according to claim 1 wherein said first and second weights and first and second rollers have the same masses respectively whereby said first and second rollers vibrate at the same amplitude.
Claim 10
Dependent Claim
172 words
A roller type earth compactor comprising a. a rigid frame, b. a first roller journalled on said frame for rotation, c. a second roller journalled on said frame for rotation and disposed behind the first roller in the direction of travel of the earth compactor, d. a first unbalanced weight rotatable about the axis of said first roller for producing vibration, e. a second unbalanced weight rotatable about the axis of said second roller for producing vibration, said second weight having a greater mass than said first weight, and f. means for driving said first weight at a first rate to generate a first frequency of vibration and said second weight at a second rate slower than said first rate to generate a second frequency of vibration less than said first frequency of vibration, g. whereby said first and second rollers vibrate at different amplitudes and at varying frequencies in a reoccurring pattern from a frequency above to a frequency below said frequencies of vibration of said first and second rates respectively.
Claim 11
Dependent Claim
172 words
A roller type earth compactor comprising a. a rigid frame, b. a first roller journalled on said frame for rotation, c. a second roller journalled on said frame for rotation and disposed behind the first roller in the direction of travel of the earth compactor, d. a first unbalanced weight rotatable about the axis of said first roller for producing vibration, e. a second unbalanced weight rotatable about the axis of said second roller for producing vibration, said second weight having a greater mass than said first weight, and f. means for driving said first weight at a first rate to generate a first frequency of vibration and said second weight at a second rate slower than said first rate to generate a second frequency of vibration less than said first frequency of vibration, g. whereby said first and second rollers vibrate at different amplitudes and at varying frequencies in a reoccurring pattern from a frequency above to a frequency below said frequencies of vibration of said first and second rates respectively.
Claim 12
Dependent Claim
50 words
A roller type compactor according to claim 9 wherein said driving means is adapted to rotate said first and second weights at rates relative to each other such that said first weight vibrates at a frequency which is an integer multiple of the frequency of vibration of said second weight.
Claim 13
Dependent Claim
38 words
A roller type compactor according to claim 10 wherein said driving means is adapted to drive said first and second weights synchronously at different speeds with the rotational positions of said weights displaced 90* relative to each other.
Claim 14
Dependent Claim
69 words
A roller type compactor according to claim 10 wherein said first and second weights are rotated and positioned relative to each other such that both weights occupy a top vertical position simultaneously at least once during several complete revolutions of said first weight, whereby an upwardly directed force simultaneously acts on both said first and second rollers to provide an unweighting action facilitating steering movement of the compacting machine.
Claim 15
Dependent Claim
45 words
A roller type compactor according to claim 12 wherein said weights initially occupy a top vertical position, and said driving means is adapted to rotate said first weight at a speed which is twice the speed at which said driving means rotates said second weight.
Claim 16
Dependent Claim
61 words
A roller type compactor according to claim 9 wherein said drive means comprises first and second shafts operatively connected to said first and second weights respectively, first and second pulleys operatively connected to said first and second shafts respectively, said second pulley having a greater diameter than said first pulley, motor means, and belt means connecting said motor means and pulleys.
Claim 17
Dependent Claim
33 words
A roller type compactor according to claim 9 wherein said belt means comprises a belt extending between said pulleys and a further belt extending between said motor means and one of said pulleys.
Claim 18
Dependent Claim
26 words
A roller type compactor according to claim 9 wherein said driving means is adapted to rotate said first and second rollers to propel said earth compactor.
Claim 19
Dependent Claim
44 words
A roller type compactor according to claim 9 wherein said second roller has a greater mass than said first roller whereby the ratio of the frequency of vibration of said unbalanced weights varies inversely with the respective masses of said unbalanced weights and rollers.
Claim 20
Dependent Claim
50 words
A roller type compactor according to claim 17 wherein said driving means is adapted to rotate said first and second weights at rates relative to each other such that said first weight vibrates at a frequency which is an integer multiple of the frequency of vibration of said second weight.
Claim 21
Dependent Claim
38 words
A roller type compactor according to claim 18 wherein said driving means is adapted to drive said first and second weights synchronously at different speeds with the rotational positions of said weights displaced 90* relative to each other.
Claim 22
Dependent Claim
69 words
A roller type compactor according to claim 18 wherein said first and second weights are rotated and positioned relative to each other such that both weights occupy a top vertical position simultaneously at least once during several complete revolutions of said first weight, whereby an upwardly directed force simultaneously acts on both said first and second rollers to provide an unweighting action facilitating steering movement of the compacting Machine.
Claim 23
Dependent Claim
45 words
A roller type compactor according to claim 20 wherein said weights initially occupy a top vertical position, and said driving means is adapted to rotate said first weight at a speed which is twice the speed at which said driving means rotates said second weight.
Claim 24
Dependent Claim
61 words
A roller type compactor according to claim 17 wherein said drive means comprises first and second shafts operatively connected to said first and second weights respectively, first and second pulleys operatively connected to said first and second shafts respectively, said second pulley having a greater diameter than said first pulley, motor means, and belt means connecting said motor means and pulleys.
Claim 25
Dependent Claim
33 words
A roller type compactor according to claim 17 wherein said belt means comprises a belt extending between said pulleys and a further belt extending between said motor means and one of said pulleys.
Claim 26
Dependent Claim
26 words
A roller type compactor according to claim 17 wherein said driving means is adapted to rotate said first and second rollers to propel said earth compactor.
Claim 27
Dependent Claim
246 words
A roller type earth compactor comprising a. a rigid frame, b. a first roller journalled on said frame for rotation, c. a second roller journalled on said frame for rotation and disposed behind the first roller in the direction of travel of the earth compactor, said second roller having a greater mass than said first roller, d. a first shaft and a first unbalanced weight mounted on said first shaft and rotatable about the axis of said first roller for producing vibration, e. a second shaft and a second unbalanced weight mounted on said second shaft and rotatable about the axis of said second roller for producing vibration, said second weight having a greater mass than said first weight, f. first and second pulleys operatively connected to said first and second shafts respectively, said second pulley having a greater diameter than said first pulley, g. motor means mounted on said frame, and h. belt means connecting said motor means and pulleys, i. whereby said first weight is driven at a first rate to generate a first frequency of vibration and said second weight is driven at a second rate slower than said first rate to generate a second frequency of vibration less than said first frequency of vibration, and j. said first and second rollers vibrate at different amplitudes and at varying frequencies in a reoccurring pattern from a frequency above to a frequency below said frequencies of vibration of said first and second rates respectively.
Claim 28
Dependent Claim
246 words
A roller type earth compactor comprising a. a rigid frame, b. a first roller journalled on said frame for rotation, c. a second roller journalled on said frame for rotation and disposed behind the first roller in the direction of travel of the earth compactor, said second roller having a greater mass than said first roller, d. a first shaft and a first unbalanced weight mounted on said first shaft and rotatable about the axis of said first roller for producing vibration, e. a second shaft and a second unbalanced weight mounted on said second shaft and rotatable about the axis of said second roller for producing vibration, said second weight having a greater mass than said first weight, f. first and second pulleys operatively connected to said first and second shafts respectively, said second pulley having a greater diameter than said first pulley, g. motor means mounted on said frame, and h. belt means connecting said motor means and pulleys, i. whereby said first weight is driven at a first rate to generate a first frequency of vibration and said second weight is driven at a second rate slower than said first rate to generate a second frequency of vibration less than said first frequency of vibration, and j. said first and second rollers vibrate at different amplitudes and at varying frequencies in a reoccurring pattern from a frequency above to a frequency below said frequencies of vibration of said first and second rates respectively.
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 |