Priority 1981-02-04 • Filed 1981-02-04 • Granted 1983-04-05 • Published 1983-04-05
A door is mounted to hinge about a horizontal axis between a closed position and an open position. A torsion bar is mounted in pretensioned manner to bias the door from the closed position to the open position and to hold the door in the open position in a tensioned manner. The vehicle body is made of molded reinforced plastic while the hinges and mounting plates are metal.
Priority 1974-06-14 • Filed 1974-06-14 • Granted 1975-09-09 • Published 1975-09-09
A racket including a string tensioning system symmetrically disposed about the racket frame so as to impose substantially equal string tension forces throughout the length of the frame.
US5359941A – Transportation system, vehicle and method
Priority 1993-04-14 • Filed 1993-04-14 • Granted 1994-11-01 • Published 1994-11-01
In his spare time, John developed a mass transportation system utilizing the existing highway infrastructure already in place. This would cut down on costs significantly, as the majority of costs related to such a transportation system are related to acquiring the necessary land to build and maintain track.
A transport assembly for use, for example, in mass transportation, comprises a track and a frame mounted to the track for motion therealong, the frame including a housing which defines a traction chamber in communication with the track. At least one traction wheel is rotatably mounted to the frame in friction contact with the track. The traction wheel is at least partially disposed in the traction chamber. A car with a passenger compartment is coupled to the frame via a shock absorbing linkage so that the car is substantially isolated from irregularities in the track during motion of the frame and the car along the track. A suction source is operatively connected to the housing for generating a vacuum in the traction chamber during motion of the frame and the car along the track. A drive mounted to the frame is operatively connected to the traction wheel for drivingly rotating the wheel to propel the frame and the car along the track.
