US Patent No: 5,253,542
Number of patents in Portfolio can not be more than 2000
Variable moment vibrator usable for driving objects into the ground
Stats
-
Oct 19, 1993
Issued date -
Jul 14, 1992
filing date -
07/913,496
serial no -
In Force
status
Importance
Loading Importance Indicators...
Abstract
A vibrator has two series of eccentric weights each comprising at least two weights turning in opposite directions and at least one motor coupled to the first series of weights by gearing and to the second series of weights by a transmission device including a phase-shifter in the form of two coaxial shafts each comprising helical teeth and an annular piston which slides between the two shafts, delimiting therewith at least one working chamber into which a pressurized hydraulic fluid can be injected. The piston has helical teeth meshing with those on the two shafts. The vibrator enables self-regulation of the amplitude of the vibrations that it produces according to the behavior of the object to which the vibrations are imparted.
Loading the Abstract Image...
First Claim
Related Publications
Loading Related Publications...
International Classification(s)
- [Classification Symbol]
- [Patents Count]
Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
|
|
|||
| 4,978,488 Concrete block molding machine having continuously driven vibrating shaft mechanism which can be programmably vibrated and method of programmably vibrating such machines | 9 | 1990 | |
|
|
|||
| 4,771,645 Vibrating plate compactor | 12 | 1987 | |
|
|
|||
| 5,010,778 Vibrator | 9 | 1989 | |