The present invention relates shortly to a driving tool for screwing rods into teeth. This tool includes a stem (2) having an attachment means (3) for a rod in one end thereof and an operating portion (4, 9) in the other end thereof. The operating portion includes a removable sleeve (9) which surrounds the operating portion end (4) of the stem (2) and which is limitedly movable in the longitudinal direction of the stem (2). The operating portion end is preferably constituted by a cylindrical hea...

Shell piles having driving tips are driven with a pipe mandrel having a shoulder for engaging the top of the shell.

Driving device with a curved cylinder in which a spherical piston is guided and can be driven by a gaseous or liquid propellant, preferably for a pyrotechnical driving device for a back-tightening device of a safety belt system. The spherical piston, the diameter of which is smaller than the smallest inside width of the cylinder is connected on the driving side to a resilient sealing element which adapts itself in accordance with the changing cross-sectional shape of the curved cylinder.

In a driving gear, a wheel is mounted on a supporting plate. The wheel has a rim with teeth on its inside surface and a pinion mounted on the supporting plate is in meshed engagement with the teeth. A housing, attached to the supporting plate, encloses the wheel. Entrainment surfaces on the outside circumference of the wheel engage an elongated power take-off member supported within and extending through the housing.

A rod is sawtooth-like vibrated by cyclically applying, to a piezoelectric element, voltage values which are stepwise and sequentially increased or decreased, so that a moving unit is driven along the rod in one direction or the opposite direction. The sequentially increased or decreased voltage values are generated by controlling of turning "on" or "off" of a plurality of switching elements, which are disposed in a circuit arrangement, wherein the piezoelectric element, and 1st and 2nd capacito...

Driving belt, comprising at least one endless, flat, metal, carrying band for a number of transverse members which can move with respect to this band and of which the surface which is in contact with the carrying band shows a crosswise curvature, said curvature being concave (hollow).

A screw-on splicer for use in driving composite pipe-shell piles and a screw-on tip for shell piles. Each has an outer diameter at least about 2 inches greater than the O.D. of the shell. An enlarged tip for shell piles, comprises a mass of concrete encased in a non-tapered corrugated shell and having a corrugated shell socket for receiving the shell stem.

A driving apparatus for producing a to-and-fro movement and having four plunger cylinders and four external non-return valves. Such driving apparatus is distinguished by a particularly simple construction.

The arm-driven vehicle has a drive mechanism comprising a driving member. A movable chain attachment is secured to the driving member and the chain attachment has spaced apart fork legs and a rod member extending therebetween. A movable arm has one end operatively attached to a fork leg that is attached to the arm-driven vehicle. A movable gear is in operative engagement with the movable arm via a pin. A chain is in operative engagement with the movable chain attachment via a bar segment. The ba...

A hydraulically actuated driving tool is provided with a ground engageable member which is driven into the ground by the action and reaction of a drive mass which is free to slide within the tool and which is repetitively forced away from and back to the ground engageable member in a manner determined by a hydraulic control system. Each repeated cycle of operation engenders two separate forces to drive the ground engageable member into the ground, one being the force exerted by high pressure flu...