Internal-combustion engines – Rotary – With compression – combustion – and expansion in a single...
Reexamination Certificate
2003-03-31
2004-08-17
Denion, Thomas (Department: 3748)
Internal-combustion engines
Rotary
With compression, combustion, and expansion in a single...
C418S092000, C418S147000
Reexamination Certificate
active
06776136
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates generally to rotary engines and, more specifically, to an elliptical rotary engine having a substantially cylindrical rotor element that rotates within an elliptical housing. A plurality of piston vanes reciprocate within and partially extend beyond piston channels in the rotor element and are urged toward the interior wall of the elliptical housing by pressurized oil introduced into the piston channel. Convex apex seals extend along the length of the distal ends of the piston vanes and rotate slightly as the engine passes through its cycle in order to conform to the curvature of the housing to provide a reliable seal therebetween. Oil conduits traverse the piston vanes to transfer pressurized oil to the apex seals with the directional flow of oil therethrough regulated by one-way check valves installed therein. The apex seals have conically shaped recesses extending therethrough with the tapered ends providing narrower recesses at the surface in contact with the housing wall in order to provide a constant supply of oil to pass therethough for the lubrication of the frictionally mated surfaces. A serpentine coolant channel extends through the housing base, block and head to maintain proper thermal control of the unit.
2. Description of the Prior Art
There are other headband devices designed for securing a communication device. Typical of these is U.S. Pat. No. 2,263,275 issued to G. F. Pieper on Nov. 18, 1941.
Another patent was issued to F. E. Heydrich on May 10, 1966 as U.S. Pat. No. 3,250,260. Yet another U.S. Pat. No. 3,437,079 was issued to D. Odawara on Apr. 8, 1969 and still yet another was issued on Oct. 2, 1973 to A. P. Bentley as U.S. Pat. No. 3,762,375.
Another patent was issued to L. D. Chisolm on Dec. 30, 1975 as U.S. Pat. No. 3,929,105. Yet another U.S. Pat. No. 4,018,191 was issued to L. B. Lloyd on Apr. 19, 1977. Another was issued to O. E. Rosaen on Oct. 12, 1982 as U.S. Pat. No. 4,353,337 and still yet another was issued on May 26, 1987 to C. N. Hansen as U.S. Pat. No. 4,667,468.
Another patent was issued to J. L. McCann on May 16, 1995 as U.S. Pat. No. 5,415,141. Yet another U.S. Pat. No. 5,524,587 was issued to Mallen et al on Jun 11, 1996. Another was issued to Holdampf on Jan. 27, 1998 as U.S. Pat. No. 5,711,268.
U.S. Pat. No. 2,263,275
Inventor: George F. Pieper
Issued: Nov. 18, 1941
In a rotary diesel internal combustion engine, a stator having a firing chamber therein and a chamber located in advance of the firing chamber, each of said chambers being provided with a cam face, a rotor snugly fitted in said stator provided with equidistantly spaced cylinders, removable cylinder liners fitted in said cylinders, removable cylinder heads carried by the rotor closing the cylinders and holding the liners in place, pistons reciprocally mounted in the cylinder liners, rigid vanes carried by the pistons slidable through the cylinder heads, means for supplying air from the exterior of the engine to the inner ends of the cylinder at certain times, means for controlling the flow of air from the cylinders to the combustion chamber, and spring means normally urging the vanes and pistons outwardly, the vanes and pistons being adapted to be cammed inwardly by the cam faces of the stator chambers.
U.S. Pat. No. 3,250,260
Inventor: Fred E. Heydrich
Issued: May 10, 1966
A rotary sliding vane engine having an engine housing with a peripheral wall having a symmetrical elliptical shaped inner surface and a pair of axially spaced end walls, a rotor mounted for rotation about a fixed axis at the intersection of the major and minor axes of said elliptical surface, said rotor having a pair of axially spaced end flanges of greater diameter than the major diameter of said elliptical surface and a hollow drum intermediate and fixed to said end flanges, axially extending slots in said drum, radially extending grooves in said end flanges aligned with said slots, with the ends of said vanes extending into said grooves in said end flanges, axially extending slots in said drum, radially extending grooves in said end flanges aligned with said slots, sliding vanes carried by said rotor in said slots, with the ends of said vanes extending into said grooves in said end flanges, said vanes cooperating with the inner housing surface to form a plurality of expansible chambers, means in said housing on opposite sides of one end of said minor axis communicating with said expansible chambers to supply combustible mixture to, and exhaust combustion products from said expansible chambers, axle means journalled in said engine housing and extending along rotor, said rotor axis and attached to said one end of said axle ending at the engine housing outer surface and being hollow and communicating with the inside of said drum to form an axial air intake, means on said housing for securing a carburetor to said air intake, radially arranged passages in one of said end flanges, passage means communicating said radial passages to the hollow interior of said drum, the radially outer ends of said radial passages opening to a fluid receiving chamber in said engine housing, means communicating said said fluid receiving chamber to said supply means, impeller means mounted on the face of the other of said end flanges remote from said hollow drum, means in said engine housing adjacent said impeller forming a chamber for receiving fluid from said impeller, and passages in said peripheral wall for directing fluid from said impeller fluid receiving chamber to cool said housing wall, and ignition means adjacent said other end of said minor axis on the some side as said exhaust means and communicating with said expansible chambers as they move past said ignition.
U.S. Pat. No. 3,437,079
Inventor: Daisaku Odawara
Issued: Apr. 8, 1969
A rotary machine of the blade type includes a plurality of blades mounted on a rotor which is eccentrically and rotatably mounted in a stationary outer casing, and working chambers which undergo periodic changes in volume as the rotor rotates. An air-tight rotor has a circumferential wall extending around the radially outer ends of the blades, and this air-tight rotor is rotatably mounted in and concentric with the outer casing, anti-friction means being disposed between the air-tight rotor and the outer casing. The radially outer ends of the blades maintain close contact with the circumfertial wall of the air-tight rotor, and the latter has at least one diametrically extending side wall engaged with the rotor which mounts the blades, the air-tight rotor and the outer casing.
U.S. Pat. No. 3,762,375
Inventor: Arthur P. Bentley
Issued: Oct. 2, 1973
This specification discloses a rotary internal vane combustion engine comprising a casing defining a rotor chamber of a shape resembling an ellipse. A shaft is journalled in the casing centrally thereof and driveably mounted on the shaft is a rotor presenting a cylindrical surface. The rotor is formed with a plurality of radial slots and slideably in each slot is a vane. The rotor is also formed with a plurality of combustion chambers opening onto its cylindrical surface. The number of combustion chambers is the same as the numbers of slots with a chamber being located between two adjacent slots.
An intake port for an air, gas, oil mixture is formed in the casing and communicating with this port are a pair of channels formed in the casing on opposite sides of the rotor chamber. These channels pass about the shaft where it is journalled in the casing and open onto the rotor chamber at points diametrically opposed to the intake port. A manifold type exhaust is formed in the casing about 30 degrees from the intake port.
A spark plug is mounted on the casing with its points located at the periphery of the rotor chamber. Conductors extend from the spark plug to contact mounted on the exterior of the casing with the contacts being bridged at periodic intervals by a cam driveably mounted on the shaft. The shaft also driveably carries a gear with which meshes a pinion tha
Denion Thomas
Kroll Michael I
Trieu Thai-Ba
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