Abstract: A pumping system and related methods involving an outer chamber and an inner chamber extending between two endplates, wherein the circumference of the inner chamber may be adjusted via a plurality of ribs and linear motors.

Abstract: A neutral brake system for use in a hydrostatic transmission to automatically apply a brake when the hydrostatic transmission is shifted to neutral. The neutral brake system includes a hydraulically-released, spring-activated brake mechanism in direct fluid communication with the main hydraulic passages which form a hydraulic circuit between the pump and the motor. When the hydrostatic transmission is shifted to neutral, a brake spring biases a brake lever into contact with a pair of friction pads to engage a brake disk splined to the output shaft of the motor to stop the vehicle. When the hydrostatic transmission is shifted out of neutral, a charge of hydraulic pressure within the hydraulic circuit causes a piston within a brake release chamber to override the biasing force of the brake spring, and to urge the brake lever out of contact with the friction pads such that the friction pads are disengaged from the brake disk, and the output shaft of the output shaft of the motor may freely rotate.

Abstract: There is described an internal combustion engine comprising at least one cylinder and a crankcase (5), which together with the cylinder forms a common, circular cylindrical tubular body (1), and comprising an oscillating piston (7) rotatably mounted about the cylinder axis and separating a cylinder space (4) defined by radial walls (3) from the crankcase (5), which oscillating piston is in drive connection with a crankshaft (16) parallel to the cylinder axis via a connecting link guide (17) for at least one crank pin (18) of the crankshaft (16), which is provided on the crankcase side of the oscillating piston (7). To create advantageous constructional conditions, it is proposed that the crank pin (18) is supported on the connecting link guide (17) via a roller (19), and that the tubular body (1) forming the cylinder and the crankcase (5) is thermally insulated to the outside.

Abstract: A fluid power rotary drive device, which possesses two oppositely moving drive pistons and an output drive part in mesh with the same. With the aid of a position presetting means it is possible to preset an intermediate position of the output drive part. For this purpose an abutment unit is provided, which has two abutment parts arranged as an axial extension of the two drive pistons. The abutment unit is able to be moved relatively to the drive piston into a positioning setting, in which the two abutment parts are both in engagement with the respectively associated drive piston, something which corresponds to the desired intermediate position.

Abstract: A power cylinder of the type in which the piston may be locked to maintain am associated tool or clamp in a fixed position. A nut is provided in an end wall of the cylinder and the piston rod of the piston passes through the nut. The initial portion of the forward stroke of the piston is accomplished by the introduction of fluid pressure into the cylinder and, as the piston approaches the final portion of its stroke, the threaded portion of the piston rod engages the nut whereupon the nut is rotated to threadably advance the piston through the final portion of its stroke. The rotation of the nut is accomplished by pressurized fluid acting against a piston rack which rotates a gear which in turn rotates the nut. The center line of the piston rod is offset from the center line of the piston to preclude rotation of the piston and of the piston rod.

Abstract: A dispenser for liquid germicide includes a container for germicide and an outlet, a metering device for metering a given amount of germicide to be dispensed from the outlet, a spout communicating with the metering device for dispensing metered germicide, and a timing arrangement coupled to the metering device for timed control of the frequency of dispensing the metered amount of germicide.

Abstract: A double acting piston and cylinder arrangement comprising an elongated cylinder and a piston assembly slidably mounted within the cylinder. The piston assembly comprises a first part and a second part which are axially adjacent each other and movable with respect to each other between a locking and nonlocking position. In the locking position, the piston assembly forces a split ring radially outwardly and against the walls of the cylinder to lock the piston assembly to the cylinder at any adjusted position. Conversely, in its nonlocking positon the ring contracts radially inwardly and permits the piston assembly to freely axially slide along the cylinder.

Abstract: An air brake includes a service brake chamber which actuates a push rod. A collet brake chamber is partially defined by a collet brake diaphragm. A locking collet is mounted to the collet brake diaphragm and includes a bore through which the push rod passes. A collet brake spring biasas the collet into a tapered collet hole to clamp the collet onto the push rod to prevent the movement of the push rod toward the brake off position. Application of pressure to the collet brake chamber overcomes the force of the collet brake spring and moves the collet away from the tapered collet hole to allow the push rod to move freely. The collet can be moved towards and locked against the collet brake spring to prevent the collet from engaging the push rod. This allows the user to effectively deactuate the collet brake feature when desired, such as to mechanically release the push rod from the collet when the vehicle is stationary.