| Patent Number |
Title Of Patent |
Date Issued |
| 4382715 |
Mass compensated impacting apparatus |
May 10, 1983 |
| In a mass compensated impacting apparatus composed of at least one pair of impacting tools and a common tool carrier supporting the tools, there is provided a two-mass vibration excitation system associated with each tool and including vibrating masses which are positively linearly guide |
| 4348901 |
Apparatus for monitoring the degree of compaction |
September 14, 1982 |
| In apparatus for monitoring the degree of compaction achieved by a compacting device including at least one vibrating compacting tool which device is mounted on a vehicle arranged to travel back and forth over a surface to be compacted, the apparatus including a system for detecting |
| 4305252 |
Centering and cooling equipment for a hydraulic vibration generator |
December 15, 1981 |
| Centering and cooling equipment for a hydraulic vibration generator, with a pulsation generator pressurizing a cylinder containing a movable piston, composed of a feed system and a flushing system. The feed system includes spring-loaded non-return valves connecting a fluid reservoir to f |
| 4265130 |
Vibration generator with adjustable eccentric weight |
May 5, 1981 |
| A vibration generator has a driven excitation shaft on which are fixed two axially-spaced first eccentric weights. A second eccentric weight positioned between the two first eccentric weights also rotates with the excitation shaft but is angularly adjustable thereon about the longitu |
| 4240326 |
Hydraulic vibration exciter and method of cooling thereof |
December 23, 1980 |
| A hydraulically operated vibration exciter for a vibrating compactor of the kind comprising a piston in a cylinder, the piston and cylinder being arranged to move to and fro relative to each other, a source of liquid under pressure, a pressure line connecting the source to the cylinder a |
| 4127351 |
Dynamic soil compaction |
November 28, 1978 |
| Method and apparatus for controlling a dynamic soil compaction operation, involving striking the soil with vibrating compacting tools, monitoring the vibrational power generated by the tools or the current degree of soil compaction, and controlling the amplitude or frequency of the vibra |
| 4121472 |
Eccentric drive |
October 24, 1978 |
| In an eccentric drive system including a rotatably mounted driven shaft, at least one primary eccentric mass fixed to the driven shaft for rotation therewith, an additional eccentric mass mounted for rotation with the shaft in a manner to permit periodic adjustment of the angular positio |
| 4014620 |
Vibratory tamper |
March 29, 1977 |
| A compact and stable vibratory tamper of relatively low height comprises a crank case, a laterally mounted motor which is arranged to impart a linear reciprocating motion to an intermediate member via a planetary gear arrangement, a crankshaft, and a crank arm, and a tamping foot which i |
| 4003203 |
Hydraulic exciter of vibrations for a vibratory compactor |
January 18, 1977 |
| A hydraulic exciter of vibrations for a vibratory compactor includes an exciter containing a piston which is movable to and fro in the cylinder and either the piston or the cylinder is connected to a compacting member. The movement of the piston in the cylinder is brought about either by |
| 3966345 |
Tandem road roller |
June 29, 1976 |
| A tandem road roller having a pair of rolls arranged one behind the other which are capable of both pivoting relative to each other to negotiate curves and being offset relative to each other to vary the width of the roller track. The roller comprises a first frame member carried on the |
