Vibratory road roller

Claim 2

A vibratory road roller comprising: a. axle shafts mounted in a rigid frame structure; b. said shafts being laterally displaced one behind the other in the direction of travel; c. two roller drums mounted on said shafts; d. one of said drums being considerably heavier than the other drums; e. vibration-producing means including eccentric weights mounted on each of the shafts carrying the roller drums; f. the eccentric weights on the shaft carrying the heavier roller being heavier than the eccentric weights on the shaft carrying the lighter roller drums; and g. motor means to supply power to each of the roller drums.

Claim 3

A vibratory road roller comprising: a. axle shafts mounted in a rigid frame structure; b. said shafts being laterally displaced one behind the other in the direction of travel; c. roller drums having substantially equal diameters mounted on said shafts; d. one of said roller drums being considerably heavier than another of said drums; e. vibration-producing means attached to at least the shaft of the heavier of said roller drums; and f. motor means to supply power to each of the roller drums.

Claim 4

A vibratory road roller comprising: a. axle shafts mounted in a rigid frame structure; b. said shafts being laterally displaced one behind the other in the direction of travel; c. roller drums having substantially equal diameters mounted on said shafts; d. one of said roller drums being considerably heavier than another of said drums; e. vibration-producing means attached to at least the shaft of the heavier of said roller drums; and f. motor means to supply power to each of the roller drums.

Claim 5

A vibratory road roller as defined in claim 2 wherein: said vibration-producing means include eccentric weights mounted on at least one of the shafts.

Claim 6

A vibratory road roller as defined in claim 3 wherein: there are two roller drums; and said eccentric weights are mounted on the shaft carrying the heavier roller drum.

Claim 7

A vibratory road roller as defined in claim 3 wherein: there are two roller drums; and said heavier roller drum is longer than said lighter roller drum.

Claim 8

A vibratory road roller as defined in claim 2 wherein: there are two roller drums; and said heavier roller drum is about 30 percent to 50 percent heavier than the lighter roller drum.

Claim 9

A vibratory road roller as defined in claim 2 wherein: there are two roller drums; and said heavier roller drum is over 50 percent heavier than the lighter roller drum.

Claim 10

A vibratory road roller as defined in claim 2 wherein: there are two roller drums; and said heavier roller drum has a weight of at least 50 percent of the overall weight of the road roller.

Claim 11

A vibratory road roller comprising: a. means mounting two axle shafts laterally displaced one behind the other in the direction of travel in a frame structure; b. a roller drum having a tire mounted on each shaft; c. one of said roller drum tires being considerably heavier than the other roller drum tire; d. vibration-producing means attached to at least the shaft of the heavier roller drums; e. said vibration-producing means including at least one eccentric weight mounted on each of the axle shafts; f. the eccentric weight on the shaft carrying the heavier roller drum tire being heavier than the eccentric weight on the shaft carrying the lighter roller drum tire; and g. the ratio of the weight of the heavier eccentric weight to the weight of the lighter eccentric weight corresponds to the ratio of the heavier roller drum tire weight to the lighter roller drum tire weight.

Claim 12

A vibratory road roller comprising: a. means mounting two axle shafts laterally displaced one behind the other in the direction of travel in a frame structure; b. a roller drum having a tire mounted on each shaft; c. one of said roller drum tires being considerably heavier than the other roller drum tire; d. vibration-producing means attached to at least the shaft of the heavier roller drums; e. said vibration-producing means including at least one eccentric weight mounted on each of the axle shafts; f. the eccentric weight on the shaft carrying the heavier roller drum tire being heavier than the eccentric weight on the shaft carrying the lighter roller drum tire; and g. the ratio of the weight of the heavier eccentric weight to the weight of the lighter eccentric weight corresponds to the ratio of the heavier roller drum tire weight to the lighter roller drum tire weight.

Claim 13

A vibratory road roller as defined in claim 9 further including: a clutch means to connect said motor means to drive either of the shafts carrying the eccentric weights.

Claim 14

A vibratory road roller as defined in claim 9 wherein: said motor means is located above the lighter roller drum.

Claim 15

A vibratory road roller as defined in claim 9 further including: a gearbox means for housing gear means which connect the motor means to said roller drums; and said motor means and said gearbox means being located adjacent to each other in the middle of the road roller.

Claim 16

A vibratory road roller comprising: a. means mounting two axle shafts laterally displaced one behind the other in the direction of travel in a frame structure; b. roller drums being mounted on said shafts; c. one of said roller drums being considerably heavier than another roller drum; d. the heavier drum being longer than the lighter drum; e. said drums having end faces which are aligned on the drive side of the road roller; f. said frame structure having a stepped configuration on the other side to follow the offset ends of the longer and shorter drums; g. vibration-producing means attached to at least the shaft of the heavier roller drum; and h. motor means to supply power to each of the roller drums.

Claim 17

A vibratory road roller comprising: a. means mounting two axle shafts laterally displaced one behind the other in the direction of travel in a frame structure; b. roller drums being mounted on said shafts; c. one of said roller drums being considerably heavier than another roller drum; d. the heavier drum being longer than the lighter drum; e. said drums having end faces which are aligned on the drive side of the road roller; f. said frame structure having a stepped configuration on the other side to follow the offset ends of the longer and shorter drums; g. vibration-producing means attached to at least the shaft of the heavier roller drum; and h. motor means to supply power to each of the roller drums.

Claim 18

A vibratory road roller comprising: a. a frame structure including two frame units having two roller drums mounted on axle shafts laterally displaced one behind the other in the direction of travel within each frame unit and means connecting said frame units; b. one of said rollers on said laterally displaced shafts being considerably heavier than the other roller drum in each said frame unit; c. said heavier roller drum being longer than said lighter roller drum within each said frame unit; d. said roller drums having end faces which are aligned on the drive side of the road roller; e. each said frame unit having a stepped configuration on the other side to follow the offset sides of the longer and shorter roller drums within each unit; f. vibration-producing means attached to at least one of the shafts; and g. motor means to supply power to one roller drum.

Claim 19

A vibratory road roller comprising: a. a frame structure including two frame units having two roller drums mounted on axle shafts laterally displaced one behind the other in the direction of travel within each frame unit and means connecting said frame units; b. one of said rollers on said laterally displaced shafts being considerably heavier than the other roller drum in each said frame unit; c. said heavier roller drum being longer than said lighter roller drum within each said frame unit; d. said roller drums having end faces which are aligned on the drive side of the road roller; e. each said frame unit having a stepped configuration on the other side to follow the offset sides of the longer and shorter roller drums within each unit; f. vibration-producing means attached to at least one of the shafts; and g. motor means to supply power to one roller drum.

Claim 20

A vibratory road roller as defined in claim 14 wherein: said longer roller drums are diagonally disposed within said road roller frame structure; and said shorter roller drums are diagonally disposed within said road roller frame structure.

Claim 21

A vibratory road roller as defined In claim 14 wherein: said frame unit connecting means include elastic coupling members spaced respectively to the front and rear of the front and rear roller drums.