Motors: expansible chamber type – Relatively movable working members with one having motive... – Single valve unit controlling plural working chambers
Reexamination Certificate
1999-11-01
2001-10-30
Lopez, F. Daniel (Department: 3745)
Motors: expansible chamber type
Relatively movable working members with one having motive...
Single valve unit controlling plural working chambers
C092S13000R
Reexamination Certificate
active
06308611
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates in general to a valve and associated piston actuated motor, and, more particularly, to a variable stroke motor and valve rotated at a constant speed.
2. Description of the Prior Art
In the prior art internal combustion piston-type devices, it is known to inject a liquid hydrocarbon into a piston assembly, draw the piston outward to create a vacuum strong enough to vaporize the hydrocarbon, and then compress the hydrocarbon before ignition thereof. Since the ignition of the hydrocarbon gas typically creates waste material and uses up most of the oxidizer within the piston assembly, work must be performed to remove the waste material and introduce fresh oxidizer into the piston assembly before more hydrocarbon may be combusted.
One drawback associated with the internal combustion engine is the pollution generated by such an engine. Additionally, since fuels typically do not burn cleanly in an internal combustion engine waste deposits build up within the piston which can either decrease the efficiency of the engine or require regular maintenance of the engine.
An additional drawback associated with internal combustion engines is the range of speeds at which typical internal combustion engines operate. Since internal combustion engines operate based upon a predetermined stroke length, the force of the combustion must be at least adequate to move the piston this predetermined stroke length. The force, however, must not be too large, otherwise components of the internal combustion engine may be damaged. Although the “force” of the stroke may be manipulated, the length of the stroke in an internal combustion engine typically cannot be varied. Accordingly, vehicles powered by internal combustion engines typically require a clutch and gearing to step up or step down the rotational energy produced by the internal combustion engine.
The difficulties encountered in the prior art discussed hereinabove are substantially eliminated by the present invention. The present invention is designed to provide a variable stroke motor with a constant speed rotating valve to increase efficiency and decrease the drawbacks associated with prior art internal combustion engines.
SUMMARY OF THE INVENTION
The present invention provides a fluid valve system comprising a valve housing and a shaft. The valve housing forms a hollow cylinder, a first fluid input, a first fluid output, a second fluid input and a second fluid output. The first fluid input and output and the second fluid input and output are all in fluid communication with the hollow cylinder. Positioned within the hollow cylinder is the shaft. The shaft is rotatable between a first position, substantially sealing off fluid communication between the first fluid input and the first fluid output, and a second position, substantially sealing off fluid communication between the second fluid input and the second fluid output. The shaft is provided with a first slot and a second slot, wherein the first slot is oriented on the shaft in a manner which opens fluid communication between the second fluid input and the second fluid output when the shaft is in the first position. The second slot is oriented on the shaft in a manner which opens fluid communication between the first fluid input and the first fluid output when the shaft is in the second position. Means are coupled to the shaft for rotating the shaft in the hollow cylinder between the first position and the second position.
In the preferred embodiment, the first fluid output and second fluid input are in fluid communication with a drive cylinder formed by a drive housing. A wobble-type piston is provided within the drive cylinder and means are provided for supplying the first fluid input with pressurized fluid such as steam. The piston is preferably coupled to a swing arm which, in turn, is connected by a sprag to a drive shaft. As the shaft within the hollow cylinder is rotated, the slots in the shaft alternately allow fluid to pass into the drive cylinder, through the first fluid input and first fluid output, and out of the drive cylinder, through the second fluid input and second fluid output. As pressure is increased, the length of the stroke of the piston increases, thereby increasing the speed at which the drive shaft is rotated. Preferably, a plurality of pistons may be coupled to the drive shaft to continue rotating the drive shaft as the first piston is on its return stroke.
REFERENCES:
patent: 1115470 (1914-10-01), Lipman
patent: 1291642 (1919-01-01), Elwell
patent: 1939887 (1933-12-01), Ferris et al.
patent: 3038311 (1962-06-01), Linsley et al.
patent: 3938426 (1976-02-01), Hunter
patent: 4538505 (1985-09-01), Morillon
patent: 4838145 (1989-06-01), Slocum et al.
patent: 5484272 (1996-01-01), Horn
patent: 5485905 (1996-01-01), Rader, III
patent: 5974943 (1999-11-01), Simonds
patent: 2347758 (1974-04-01), None
Lopez F. Daniel
Thermal Dynamics, Inc.
Trout Brett J.
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