A fluid device including, in a first aspect, a fixed member defining a first cam surface having m cycles, a movable member defining a second cam surface having n cycles, and a movable piston support carrying fewer than the greater of m and n pistons each of which is mounted for movement relative to the piston support and engages the cam surface; and, including in a second aspect, a hydrostatic piston assembly mounted on a piston support for movement relative thereto in engagement with at least t...

A device for the fine, homogeneous pulverization of one fluid by another. The device comprises an intake pipe carrying the driving fluid, a tube carrying the fluid to be driven which is introduced into the driving fluid, and an olive-shaped mass arranged at the outlet of the intake pipe and coaxial therewith. The forward end of the olive-shaped mass extends beyond the plane of the outlet orifice of the intake pipe. The plane including the largest cross-section of the mass substantially coincides...

A liquid crystal display panel is driven by scan line inversion driving. Here, a virtual scanning period is provided between an Mth scanning period and a first scanning period which constitutes a frame next to the Mth scanning period. In the virtual period, the display panel is driven by setting a voltage level of a counter electrode VCOM to a voltage level different from VCOM during the Mth and the first scanning periods. During the period T1 in which VCOM becomes VC1, data line is driven using...

Method and apparatus for driving a tubular pile into the ground characterized by filling and retaining a column of liquid in a substantially static condition in the pile, said column extending from substantially the bottom of the pile to a point located a predetermined distance below the top of the pile, while applying driving forces directly to the top of the pile.

An apparatus for driving a tunnel, the apparatus having a knife shield composed of a circular array of elongate knife implements supported by a frame and attachable to a drive frame which can be moved to cause the implements to penetrate into a working face in order to excavate material therefrom. To the rear of the knife shield there is an advanceable temporary lining composed of tube sections arranged end-to-end and designed to support the newly-formed tunnel. This advanceable lining extends i...

A rotary device of the type comprising a housing defining a first trochoidal internal profile between a pair of end walls and a rotor rotatable within the housing defining at its periphery a second trochoidal surface, the housing profile and rotor surface defining working chambers the volume of which expand and contract during relative rotation of the rotor and housing, and the rotor and housing defining conduits and porting for introducing fluid into the working chambers through the rotor.

A pile driver includes a base and selectively operable means, such as an air cushion support system, for supporting the base in an elevated position above ground. Suitable cranes are provided for disposing a pile substantially vertically of the base with the lower end of the pile in engagement with ground adjacent the base. The base carries means which are operable in the elevated position of the base for transferring at least a substantial portion of the weight of the base to the pile. A suitab...

A golf driving range is provided that may be used in different weather conditions. Thus, a stall has a front viewing window through which the range can be seen, which can be opened in hot weather or closed in cold weather. A bottom doorway section permits driving the ball when the window is closed. The range has a set of inclined screens forming ball receiving troughs at various specified driving distances from the stall and a conveyer system returns balls. Several stalls are placed as side by s...

A driving device of the disclosure has an electromechanical transducer that extends and contracts upon application of voltage thereto and a support member that slidably supports a movable body and is displaced with the electromechanical transducer to which the support member is connected. The disclosed device includes a drive circuit that applies the voltage to the electromechanical transducer is such that the voltage which increases or decreases from a first voltage to a last voltage in a stepp...

A driving apparatus for driving a plurality of display devices of a panel is provided. The driving apparatus comprises a controllable current source and a plurality of current storage and duplicating apparatuses. Wherein, each of the current storage and duplicating apparatuses is coupled to the controllable current source and one of the display devices corresponding thereto to receive a first current from the controllable current source, and to output a second current which is equal, or proporti...