Did You Know...
...that power steering was invented by independent inventor Francis W. Davis? As chief engineer in the 1920s of the truck division of the Pierce Arrow Motor Car Company, he saw how hard it was to steer heavy vehicles. So that he would be able to keep the profits from his future invention, Davis left his job, rented a small engineering shop in Waltham, Mass., and developed a hydraulic power steering system that led to power steering.
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| Number | Title | Issue Date |
| 7316303 | Force-controlling mechanical device A mechanical device for use in the control of mechanical forces. The device comprising first and second terminals which, in use, are connected to components in a system for controlling mechanical forces. These terminals are moveable with respect to one another. The ... | 01/08/2008 |
| 6352143 | Vibration damping system using a hydraulic damper with a field responsive fluid control A vibration damping system for absorbing shock loads includes a hydraulic damper containing a piston slidably reciprocating within an oil filled chamber and dividing the chamber into a pair of subchambers. A hydraulic motor is in fluid communication with ... | 03/05/2002 |
| 5566795 | Braking system for a rail car A hydraulic braking system for a rail car is provided. The system includes a hydraulic pump or motor adapted to engage a rail car axle or wheel. When rotating, the axle or wheel drives the hydraulic pump causing a hydraulic fluid to circulate. By restrict... | 10/22/1996 |
| 5558187 | Brake apparatus for a rotating shaft A brake apparatus for a rotating shaft. The apparatus comprises a fluid-tight housing in which is disposed a shaft rotational engagement gear having an exteriorly-accessible portion thereof rotatably engageable with a shaft. A plurality of compartments ar... | 09/24/1996 |
| 5373921 | Hydraulic gearwheel brake pump According to the invention there is provided a hydraulic brake coupled to a rotary shaft. It includes a hydraulic pump connected to the shaft, the pump having a pump inlet, and a pump outlet, a hydraulic loop having an inlet part connected to the pump out... | 12/20/1994 |
| 5325944 | Apparatus and method for braking a vehicle A system for effecting the braking of a vehicle. The system is intended to be used with a vehicle which has an axle coaxial with a wheel engaging the surface over which the vehicle travels and which is rotatable with that wheel. The braking system include... | 07/05/1994 |
| 5036937 | Exercise vehicle A three-wheel exercise vehicle that may be operator pedaled by means of a crank assembly that is coupled by a transmission to a wheel. In addition, an internal combustion engine may power this wheel. The pedal-operated crank assembly is also coupled to a ... | 08/06/1991 |
| 4967444 | Device for damping the closing movement of a dual door spring-loaded or closure and closure control therefor A double-winged door spring is biased for closing with a mechanism for damping of the closure movement and includes a closure sequence control, particularly of a fire-resistant door, in which the damping of the movable door portion is accomplished through... | 11/06/1990 |
| 4744443 | Hydrodynamic retarder A hydrodynamic retarder is revealed having a rotor blade wheel and a stator blade wheel each with two different types of blading, i.e. an inner blading enclosed by an outer blading. The two blade rings are provided with blades inclined in opposite directi... | 05/17/1988 |
| 4728098 | Rotating playground equipment assembly A rotating user-propelled playground equipment assembly or whirl including an equipment support base, a spindle secured to the support base, a rotatable platform assembly supported at least in part by the support base. The rotatable platform assembly incl... | 03/01/1988 |
| 4626044 | Hydraulic brake for vehicles A hydraulic brake having an electrohydraulic antiskid system with a high switching frequency which is speed-proportional. The switching frequency is determined from the number of cross holes in a gear and the gear speed. The cut-in time is electronically ... | 12/02/1986 |
| 4241814 | Mechanical-hydraulic damper for a load subject to shocks and vibrations A mechanical-hydraulic damper for a load which is subject to shocks and vibrations, comprising a co-operating pair of elements, the first of the pair of elements being mounted in a body for relative axial movement in relation to the body and the second of... | 12/30/1980 |
| 4214652 | Variable power transmission and absorption device An apparatus is provided which is adapted to deliver or absorb variable amounts of torque or to deliver variable quantities of an incompressible fluid at a predetermined pressure. The device comprises a positive displacement pump capable of pumping a comp... | 07/29/1980 |
| 4005730 | Brake means for an air-powered sprinkler system A brake for a fluid-powered sprinkler system is provided for preventing the drive towers from rolling down inclines and for preventing the wind from rolling the drive towers. The fluid power may either be compressed air or water under pressure. An overhea... | 02/01/1977 |
| 3946989 | Slow descender including fluid and mechanical braking devices A slow descender includes a rope pulley and a braking apparatus which restricts the rotation speed of the rope pulley. The braking apparatus includes a mechanical braking device containing a centrifugal brake which has centrifugal weights, a V-shaped lini... | 03/30/1976 |
