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7409901 |
Variable stroke assembly
A variable stroke assembly enables the piston stroke length of a positive displacement pump to be varied while maintaining a substantially constant unswept volume in the piston cylinder....
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7367258 |
Longitudinally adjustable reversible axial piston machine
The invention relates to a reversible axial piston machine (1) consisting of a cylinder drum (5) which rotates about a rotational axis (7) and in which pistons can be displaced in cylinders (6),...
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7216580 |
Multistage stroke cylinder apparatus
A multistage stroke cylinder apparatus includes a main cylinder having a main piston and a main rod, an intermediate stop position setting mechanism for setting an intermediate stop position of the...
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7047867 |
Oscillating device for adjusting the displacement of a fluid pump
A device for adjusting the displacement of a fluid pump includes a swashplate supported for pivotal movement about a first axis, and an engine having first and second cylinders. A first piston is...
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6962103 |
Multi-stroke cylinder
A multi-stroke air cylinder providing a precisely directed and controlled stroke in the face of lateral, torsional and tilting loads on a tooling plate. The multi-stroke cylinder utilizes a...
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6742440 |
Servo-controlled integral stop for use with a servo-controlled hydraulic piston
Apparatus, and an accompanying method for use therein, that utilizes working and stopping servo-controlled hydraulic pistons wherein the stopping piston acts as a controlled mechanical stop for the...
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6474214 |
Three-position stop type swing actuator
A three-position stop type swing actuator has a main piston freely moving in forward and backward directions in an axial direction within a casing, an output shaft placed at a coaxial position with...
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6408740 |
Three position cylinder
A three position cylinder assembly having an outer cylinder connected between two bases defining a cap end and a head end. A stationary tubular member is secured to the cap end of the outer...
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6367367 |
Brake cylinder device
A brake cylinder device with a built-in automatic shoe clearance adjustment device which prevents a chance of misassembly, loosing, or omitting the spacer. The brake cylinder device includes an...
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6343537 |
Dual stroke cylinder
A piston 14 for sliding in a cylinder 12, a rod 16 of the piston 14, and a sleeve 15 fitted over the rod 16 and passing through a rod hole 13 of the cylinder are provided. A lock portion 18 is...
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5957028 |
Actuator for gear shifting mechanisms for motor vehicles
An actuator for a gear shifting mechanism of a motor vehicle has a housing with pressure chambers and one connector opening into each pressure chamber for supplying a pressure medium into the...
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5934432 |
Actuator system for vehicle automated clutches with electric motor actuator and pressurized fluid override
An actuator system (31) for controlling engagement and disengagement of an automated vehicular master clutch (C). The system includes an electric motor (86) controlled actuator (62) for precision...
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5816131 |
Fluid-controlled actuator assembly
A fluid-controlled actuator assembly for a gearbox of a vehicle. The actuator is provided with a four-position mobile element, with a first and a second chamber separated in a sealed manner from...
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5357844 |
Run-up control for the pressure cheek in a drawing apparatus
A run-up control for the pressure cheek in a drawing apparatus achieves stoppage times during the run-up phase by having a pressure cylinder with first and second pressure spaces as well as a...
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5279206 |
Variable displacement hydrostatic device and neutral return mechanism therefor
A variable displacement radial ball pump (11) is disclosed of the type in which the balls (59) are restrained by a cam ring (25), which is pivotable about a cam pivot pin (27) to vary the...
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5207111 |
Rotary unit
The present invention discloses an apparatus for the rotation of, for example, workpieces to be machined, on a carrier which can be set in rotation by a pinion shaft with toothed strips via a rack,...
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5193430 |
Air cylinder with intermediate mechanical dead-stop
Presented is an air cylinder apparatus including a control mechanism that is operable to interject mechanical dead-stops to control the linear translation of the piston of the air cylinder to...
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5188018 |
Linear unit with displaceable ball bearing assembly
The present invention discloses a linear unit, especially an apparatus for the machining, transportation and manipulation of workpieces, with a housing and with a carriage which is movable out of...
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5127315 |
Brake motor subassembly and process for adjusting such a subassembly
A brake motor subassembly comprises a control piston (10) having an internal cavity delimited by a base wall (18) and, at the periphery, by a stepped bore (20, 22, 24) and having a mechanical...
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5106275 |
Arrangement on a pump unit
Pump units comprising a metering reciprocating pump with adjustable length of stroke are used in packing machines for filling of packing containers with a metered quantity of flowable contents,...
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5098260 |
Position-servo device for positioning a stop in a positive displacement fuel injection system
An electro-hydraulic position-servo device to quickly and accurately position a stop element is provided for use with a positive displacement fuel injection system, wherein a shuttle is used to...
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5086863 |
All-wheel steering system for motor vehicles
An all-wheel steering system for motor vehicles includes an adjusting motor (10) for the rear wheels. The motor has a piston rod on which two fixed working pistons (25 and 25A) and, in a housing...
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5071320 |
Control system and method for chemical injectors
A control system and method for chemical injectors includes a controller which outputs multiple feed set point signals and associated driver signals, each set point signal defining a desired...
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5009068 |
Pneumatic cylinder with positioning, braking, and feed rate control
A pneumatic piston/cylinder unit comprises primary and secondary pistons operable in first and second cylinder zones respectively. Each of the primary and secondary pistons divide its respective...
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4969281 |
Hydraulic system for laundry flatwork ironer
A hydraulic system for operating the rollers and one or more steam chests in a laundry flatwork ironer. A two-way, variable delivery, high pressure, main pump operates a hydraulic motor driving the...
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4945819 |
Clamping apparatus for the rotary spindle of a machine tool
The chuck or collet actuating apparatus for a machine tool comprises a rotating clamping cylinder, an axially slidable clamping piston rotating with the clamping cylinder and a coaxial cylindrical...
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4896585 |
Adjustable axial piston machine
An adjustable axial piston machine is disclosed which has a housing, a cylinder drum and an operating cylinder-servo piston unit capable of being acted upon by control pressure. The cylinder-servo...
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4869397 |
Adjustable fill motor assembly
A control arrangement is provided which permits precise metering of a bellows pump. The control arrangement permits the predetermined setting of an amount of fluid to be dispensed from a single...
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4838771 |
Biasing force adjusting apparatus for electromagnetically driven reciprocating pump
A biasing force adjusting apparatus is used for an electromagnetically driven reciprocating pump in which the piston is reciprocated to achieve pumping by a magnetic force cyclically generated from...
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4815359 |
Compact brake piston return mechanism
The brake piston return mechanism (10) comprises a housing (22) which includes housing part (50) that forms with the housing a chamber (59) and an axially extending groove (55). Disposed within the...
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4811624 |
Hydraulically actuated stroke adjusting device
In a stroke adjusting device on pumps, in particular proportioning pumps, a hydraulic actuation occurs due to the fact that a hollow shaft, which guides in its interior a sliding shaft, is formed...
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4802559 |
Hydropneumatic brake actuator arranged to maintain a constant brake shoe clearance
A hydraulic power unit for a hydropneumatic brake actuator having a power piston comprising a force piston formed with a bore therein and a take-up piston operative in the force piston bore for...
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4748899 |
Dual-pressure jack
The casing of the jack is divided into two cylinders by a cross partition, with a first piston which moves in one of the cylinders and a second piston, forming two parts, linked by a rod which...
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4744286 |
Brake motor subassembly
The brake motor subassembly with automatic play compensation limitation by way of a stepped pilot piston (20), comprising a first cylindrical peripheral surface of larger diameter (21) sliding in...
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4703684 |
Vacuum control device for the displacement of an element between at least three positions
A vacuum control device comprises a casing in which are disposed at least two substantially parallel movable cups, the first cup being connected to the element to be displaced. Springs are...
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4681515 |
Walking beam pump having adjustable crank pin
Variable stroke pump apparatus includes a photovoltaic array for providing electrical current to motors, one of which provides for the pumping action of a walking beam, one of which provides for...
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4653383 |
Oil well sub-surface pump stroke extender
The pump stroke extender adjusts the stroke of a polish rod normally clamped to a connector cable of an oscillating horse head for operating a sub-surface oil well pump. The extender includes a...
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4646620 |
Automatic depth control system
An automatic depth control system is disclosed. The system includes a floating piston hydraulic cylinder in which the floating piston is adjusted as a stop for limiting the travel of the main...
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4646849 |
Reversible plough having a reversing and adjustment mechanism
A reversing and adjustment mechanism, especially for a reversible plough adapted for hydraulically adjustable furrow width and hydraulic reversing of the plough, wherein the reversing and...
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4641725 |
Wide dynamic range hydraulic vibrator
An apparatus for incremental cylinder length control in a hydraulic vibrator of the type having a reaction mass with a cylinder bore disposed therein, first and second end sleeves disposed in...
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4582304 |
Gas spring with pressure loss safety
A gas spring, having a collapse safety feature operable in the event of psure loss, is provided, for use, for example, as a counterbalance for flaps or vertically adjustable structures. A movable...
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4563953 |
Tamping head with limiting stop for tool reciprocation
A tamping head for a mobile track working machine comprises a tamping tool carrier vertically adjustably mounted on the machine, a vibratory tamping tool mounted on the carrier for immersion in a...
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4498845 |
Pumper bumper
Method and apparatus by which a malfunctioning downhole pump of the reciprocatory type can be rendered operative by bumping the pump piston against structure associated with the pump barrel. The...
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4485768 |
Scotch yoke engine with variable stroke and compression ratio
A yoke type engine wherein the orbital path of the slider is alterable to effect piston stroke and compression ratio changes. A crank component has a crankpin which carries and positions the...
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4467605 |
Hydro-pneumatic actuator with automatic slack adjuster
A two-stage, hydro-pneumatic actuator suitable for use as a railway vehicle brake. The hydraulic cylinder comprises a large diameter bore in which a low- and a high-pressure piston operate jointly...
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4450928 |
Dual mode seismic source vibrator
A dual mode vibrator (DMV), in its hydraulic cylinder, automatically provides a shorter stroke for higher frequencies and a longer stroke for lower frequencies. The cylinder contains a pair of...
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4401010 |
Variable-torque-accommodating machine
A piston-cylinder device, such as a Rankine cycle engine, is provided with one or more variable displacement cylinders and variable stroke pistons for accommodating loads of variable torque....
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4384576 |
Ventilator apparatus
A portable positive displacement respirator/ventilator is provided for both a pressure sigh and a volume sigh of predetermined duration and frequency by providing a variable length crank arm...
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4372116 |
Stirling engine control mechanism and method
A reciprocating-to-rotating motion conversion and power control device for a Stirling engine includes a hub mounted on an offset portion of the output shaft for rotation relative to the shaft and...
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4325700 |
Position-retentive valve seat for hydraulic cylinder
A hydraulic cylinder having a piston position memory element is disclosed, and is particularly adapted for use with propulsion units for watercraft. A valve seat (76,242) is frictionally retained...
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