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| Number | Title | Issue Date |
| 7032464 | Closed-loop waterbrake dynamometer fluid volumetric control system and method A waterbrake dynamometer fluid volumetric control system and method includes a closed-loop recirculation passage to maintain a substantially constant fluid volume within the waterbrake. Fluid volume within the waterbrake is controlled by selectively supplying fluid ... | 04/25/2006 |
| 7029233 | Modulator water dynamometer A modular waterbrake that can be used with differing types and sizes of rotating machines includes common end stages, and a plurality of common intervening power stages. Each power stage will extract a certain amount of shaft horsepower from the machine under test, ... | 04/18/2006 |
| 6834558 | Combined torque measurement and clutch apparatus A method of using a magnetic fluid clutch for torque measurement comprises steps of modulating electric current through a coil of the magnetic fluid clutch to maintain a steady-state quasi-solid phase of a magnetic fluid medium contained within the magnetic fluid cl... | 12/28/2004 |
| 5834654 | Torque and temperature control for a water brake dynamometer Simultaneously opening and closing the inlet and outlet valves of a water brake dynamometer to increase or decrease the flow of water through the dynamometer. By so controlling the flow of water through the dynamometer, the power absorbed by the water wit... | 11/10/1998 |
| 5797303 | Sleeve bore machining apparatus and sleeve bore machining method A sleeve bore machining apparatus has a plurality of reamers with different diameters, wherein a ball etc. is pressed in and passed through the sleeve bore after a machining with the reamer inserted in the sleeve, measures the push-in load involved in the... | 08/25/1998 |
| 5718155 | Sleeve bore machining apparatus and sleeve bore machining method A sleeve bore machining apparatus has a plurality of reamers with different diameters, wherein a ball etc. is pressed in and passed through the sleeve bore after a machining with the reamer inserted in the sleeve, measures the push-in load involved in the... | 02/17/1998 |
| 5571975 | Power absorbing dynamometer A power absorbing dynamometer includes a stator having an inside stator surface and a rotor having an inside rotor surface. The rotor is rotatable by a mechanical power source. The inside rotor and stator surfaces generally face and oppose each other. Tog... | 11/05/1996 |
| 5396811 | Fluid dynamometer having fluid characteristic power absorption adjustment capability A fluid dynamometer is provided for absorbing a range of power output proed by an engine's rotating shaft. Power absorbing characteristics are controlled by adjusting the fluid media characteristics in terms of its temperature and/or its density and visc... | 03/14/1995 |
| 4899595 | Modular dynamometer with extended testing range A modular dynamometer includes a stator mounted to and disposed within a housing and the combustion of a shaft and a rotor also disposed within the housing. The shaft extends through the housing and is adapted for coupling to a prime mover. The housing is... | 02/13/1990 |
| 4864872 | Hydraulic dynamometer A hydraulic dynamometer which includes a housing defining an interior working compartment and within which an input shaft is journalled. A rotor having a rotor face is mounted on the input shaft for rotation about a shaft axis. A stator is provided in the... | 09/12/1989 |
| 4744724 | Absorption dynamometer In the embodiment depicted, the dynamometer is of an absorption type, for fluid, having fluid entries on both axial ends thereof, and a rotor having blades disposed, in a radial exit flow path, in parallel with the rotor axis. Adjustable, annular, blade s... | 05/17/1988 |
| 4718286 | Dynamometer system for rotary blade-type lawm mowers A dynamometer system for applying a controlled variable operating load against the blade of a rotary-type lawn mower while the mower is in stationary operation atop the system. The system includes a frame for supporting and securing the lawn mower thereup... | 01/12/1988 |
| 4669318 | Apparatus for dynamometer testing of motor vehicles Apparatus for dynamometer testing of motor vehicles comprising load absorbing means in the form of a hydrostatic pump assembly which has an input shaft adapted to have a flexurally rigid engagement with a driven vehicle shaft using a rigid coupling. The c... | 06/02/1987 |
| 4215569 | Unitary valve for water brake dynamometer A water brake dynamometer includes a water brake having a stator housing with a rotor disc mounted on a through shaft. Water from a reservoir is directed into the housing as the shaft and rotor are driven by an external engine. Means are provided to measu... | 08/05/1980 |
| 4213332 | Rotor-stator configuration for water brake dynamometer A water brake dynamometer includes a water brake having a stator housing with a rotor disc mounted on a through shaft. Water is pumped into the interior of the housing as the shaft and rotor are driven by an external engine. Momentum interaction transfers... | 07/22/1980 |
| 4062233 | Dynamometer A dynamometer is provided having a housing mounted to allow at least partial rotational displacement about its longitudinal axis, with a frictional engaging means connected thereto for engaging the external surface of a rotatable drum. This drum, which is... | 12/13/1977 |
| 4020684 | Control valve especially for hydraulic absorption dynamometers A control valve absorption dynamometers has a closed end discharge conduit forming a cylinder with discharge openings in the cylinder walls. A floating piston is movable in the cylinder to vary the area of the discharge openings. A first piston surface is... | 05/03/1977 |
| 3969931 | Power tester for outboard drive assemblies A hydraulic pump is serially connected in a closed loop hydraulic circuit provided with a control valve for controlling the flow of hydraulic fluid through the circuit and the hydraulic motor has mounting structure operatively associated therewith for rel... | 07/20/1976 |
| 3945473 | Individualized stator and rotor for hydromatic brakes This invention describes an improved type of hydromatic brake in which the stators and rotors are prepared as individual items and the assembly is designed so that one, two, three or more sets of individual stators and rotors can be assembled inside a hou... | 03/23/1976 |
| 3942363 | Drive-dynamometer system A drive-dynamometer system particularly adapted for automated testing of parts such as vehicle engines. The dynamometer is a hydrostatic system having a fixed displacement motor connected to, and a variable displacement pump spaced from the part being tes... | 03/09/1976 |
| 3938377 | Method and apparatus for production hot testing of engines under load A method and apparatus for hot testing on a production basis, automobile engines as they come off the assembly line for performing a final check on such engines before they are installed in the automobile. The engines are tested for exhaust emissions at t... | 02/17/1976 |
