In a driving mechanism of the kind having a drive part and a driven part with a shear-type coupling therebetween, the drive and driven parts have respective cylindrical surfaces which are spaced apart from, and substantially coaxial with, one another to define an annular space centered on the rotational axis of the parts. A fluid is disposed in the annular space to provide, at least in part, the said shear-type fluid coupling, and the spaced cylindrical surfaces together with the fluid therebetw...

A driving assembly for moving one unit with respect to another, for instance, a working unit with respect to a frame unit. Preferred practical applications for the driving assembly are lifting platforms or presses. The driving assembly includes a flat, enclosed, flexible container or bladder disposed between the two units. End wall portions of the container comprise the major surface area thereof. When pressure is introduced into the container, the walls thereof bear entirely against opposed bea...

A driving mechanism comprises an input sun gear meshing with planet gears; and an output shaft of a motor detachably inserted into said input sun gear to enable said input sun gear to be radially movable to a very small degree, whereby said planet gears are allowed to effect a very small eccentric revolutional motion when the torque of said output shaft is transmitted to said input sun gear.

Apparatus and method for driving an object such as a nail covered by a deformable member such as a shingle without damage to the latter. Force is applied by means such as a hammer to a force distributing member in engagement with the deformable member. A force receiving member is positioned opposite the force distributing member and the deformable member is positioned between the force distributing and force receiving members. The force is received from the deformable member by the force receivi...

A driving shield having a shield shell and a transverse wall for defining a work chamber, and a removal arm pivotally journalled on the transverse wall. The removal arm has a removal tool for mining or removing a face wall which also delimits the work chamber. A pressure medium supply is provided for attaining a support pressure in the work chamber. Material worked away from the face wall is removed by a discharge conduit arranged essentially along the bottom of the shield shell. The work or mat...

A driving system of the type wherein a driving screw shaft is used and one or more units can be selectively moved along the shaft is disclosed. The driving system comprises a driving screw shaft extending through the slide base of a unit to be driven and provided at its periphery with a slide key way extending in the direction of the longitudinal axis of the shaft, a driving source for rotating the screw shaft, a female screw meshed with the screw shaft and provided in the slide base of the unit...

A driving belt formed from detachable, flexible, elongate links arranged in a staggered, overlapping relationship. Each link is provided with a stud which is rotatable relative to the link and has a head which is shaped to pass through perforations in other links when the head is orientated correctly relative to the perforations but not otherwise. The arrangement allows simple assembly and disassembly of the belt without any lateral distortion of the material of the links.

The driving arrangement comprises a planetary gearing transmitting driving torque to the driven output member including a hub journalled in bearings in a support structure and a drum coupled therewith, adapted to take up the load of a moving object. The hub is enclosed within the drum, the hub and the drum being interconnected with aid of discs fixed to their respective end faces, the discs being likewise rigidly coupled with aid of intermediate elements extending between the planet pinions of t...

A driving mirror including an extruded support for gripping the longer edges of a rectangular mirror glass with the longer edges of the mirror glass extending longitudinally of the mirror. The support includes curved ribs for resiliently biasing the mirror outwardly against inner surfaces of front flanges to lock the mirror in place in the support. End caps are provided which are adapted to contain the mirror within the support and a tie rod extends through the caps for receiving nuts to hold th...

A driving assembly has a gearing and a motor the drive shaft of which can be selectively coupled with one of two or more input gears of the gearing thereby changing the ratio of transmission of the gearing. The motor is exchangeably mounted and may have two drive gears either one of which can be coupled to an input gear of the gearing.