Did You Know...
...that to encourage use of his new invention, the shopping cart, market owner Sylvan Goldman hired fake shoppers to push the carts around his store in Oklahoma City? Seems his customers were reluctant to give up their hand-carried baskets.
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| Number | Title | Issue Date |
| 7438027 | Fluid transfer in reciprocating devices The disclosure relates to fluid working devices including reciprocating internal combustion engines and pumps. A number of arrangements for pistons and cylinders of unconventional configuration are described, many intended for use in IC engines operating without coo... | 10/21/2008 |
| 7428885 | Rotary engine employing undulating ramp driven by paired reciprocating pistons A rotary gasoline engine has two sets of pistons, which move reciprocally. The reciprocal output of said pistons is coupled to an undulating ramp, which converts the reciprocal motion to rotary motion. The engine casing has a hollow center though which no shaft runs... | 09/30/2008 |
| 7308869 | Radial compression-ignition engine A compression-ignition internal combustion engine for aircraft generally comprises a stationary crankshaft, a crankcase adapted to rotate about the stationary crankshaft, and a plurality of cylinders radially extending from the crankcase. Each cylinder includes a pi... | 12/18/2007 |
| 7299740 | Reciprocating axial displacement device A reciprocating axial displacement mechanism is disclosed generally comprising a housing, a rotating device, a displacement device having first and second undulating surfaces disposed in the housing, and a cam connected to the rotating device and disposed between th... | 11/27/2007 |
| 7240645 | Internal combustion engine The invention concerns an internal-combustion engine, the engine comprising a first combustion chamber, a first piston displaceably guided in the first combustion chamber, the first piston facing the first combustion chamber with a first piston surface in a first di... | 07/10/2007 |
| 7168979 | Microwave connector A coaxial connector including an outer conductor, a glass to metal seal (GMS) assembly, and a center conductor, is disclosed. The outer conductor has a tubular shape and defines longitudinal axis. Here, the center conductor and the GMS assembly are coupled before th... | 01/30/2007 |
| 7117827 | Means for treatment of the gases of combustion engines and the transmission of their power The disclosure relates to fluid working devices including reciprocating internal combustion engines and pumps. A number of arrangements for pistons and cylinders of unconventional configuration are described, mostly intended for use in IC engines operating without c... | 10/10/2006 |
| 6986328 | Rotary piston machine A rotary piston machine includes a housing provided with a cylindrical inner wall and at least one piston disposed inside the housing and rotating around a longitudinal central axis of the housing while moving back and forth in a linear manner, under the control of ... | 01/17/2006 |
| 6758170 | Multi-cycle trainable piston engine A multiple-cycle engine is provided that alternates between two-cycle and four-cycle operation in response to measured engine conditions. Each piston is ball and socket mounted to allow the piston to be trained to five positions by a training block within the cylind... | 07/06/2004 |
| 6499445 | Two-stroke engine A two-stroke engine including a cylinder body having an air intake and an air vent, a piston slidably positioned in a portion of the cylinder body and having an admission passage and an air channel located in an upper portion of the piston, a crankshaft r... | 12/31/2002 |
| 6449940 | Internal combustion engine The internal combustion engine comprises at least one combustion chamber for burning a fuel in timed explosions accompanied by formation of a combustion gas, at least one expansion chamber which is connected with the combustion chamber and separate from t... | 09/17/2002 |
| 5842448 | Oscillating reciprocating piston two-stroke engine An oscillating and reciprocating piston engine having a piston oscillating and reciprocating within a cylinder, a drive shaft housing attached to the cylinder, and a drive shaft turning within the drive shaft housing. The drive shaft is rotatably, slidabl... | 12/01/1998 |
| 5660150 | Piston and combustion engine An internal combustion engine having at least one cylinder and reciprocating means (1) comprising pistons (12) which are slidable in said cylinders, said reciprocating means (1) and pistons (12) having a common axis, a pair of rotors (5,6) mounted on oppo... | 08/26/1997 |
| 5517952 | Rotating shuttle engines with integral valving The present invention relates to an internal combustion engine and, in particular, to an improved internal combustion engine having shuttles whose combined rotational and reciprocating motion produce output power and, at the same time, provide valving for... | 05/21/1996 |
| 5159902 | Rotary vee engine with through-piston induction A rotary vee engine with through-piston induction includes a housing supporting a pair of rotors positioned in an obtuse angular relation and having pluralities of cylinders mounted thereon about respective rotor axes. Aligned cylinders in the opposite ro... | 11/03/1992 |
| 4974556 | Internal combustion engine An internal combustion engine includes a pair of opposed piston assemblies that reciprocate within a single combustion chamber in an engine block. Each piston assembly includes an annular piston head that is received concentrically around a driveshaft whi... | 12/04/1990 |
| 4919104 | Reciprocating machine The invention relates to reciprocating machines with pistons being lubricated by a gas film which is built-up by rotation of the piston in the cylinder, both piston and cylinder consisting preferably of ceramic materials. The invention relates furthermore... | 04/24/1990 |
| 4553506 | Engine with rotating cylinder wall This invention refers to a piston machine, most particularly an internal-combustion machine, in which the cylinder wall performs a rotating motion round its own axis. Apertures on the cylinder wall allow it to act as a rotating slide valve, so that no val... | 11/19/1985 |
| 4437437 | Dual-expansion internal combustion cycle and engine A novel internal combustion cycle and internal combustion engine operating thereon. Expansion of the hot combustion gases is controllably achieved in a primary combustion/expansion chamber and a secondary expansion chamber in a manner to reduce engine exh... | 03/20/1984 |
| 4372179 | Reciprocating-piston drive mechanism A reciprocating-piston drive mechanism comprises a reciprocating-piston assembly defining a spherical socket and including a piston body. A connecting rod is arranged for pivoting movement in a plane and has a ball head fitted in the spherical socket. A c... | 02/08/1983 |
| 4357915 | Propeller and piston combination for internal combustion engines This piston design serves to increase engine horsepower, and causes less friction, while simultaneously reducing fuel consumption. It consists primarily of a propeller-topped piston, secured, by its wrist pin, in a rotatable swivel member in the top of a ... | 11/09/1982 |
| 4325331 | Dual-expansion internal combustion cycle and engine A novel internal combustion cycle and internal combustion engine operating thereon. Expansion of the hot combustion gases is controllably achieved in a primary combustion/expansion chamber and a secondary expansion chamber in a manner to reduce engine exh... | 04/20/1982 |
| 4136647 | Rotary device particularly useful as a rotary engine A rotary device particularly useful as a rotary engine comprises a cylinder having two (or more) pairs of axially displaceable pistons, the pistons of each pair being movable towards and away from each other to define an expansible and contractable chambe... | 01/30/1979 |
| 4132118 | Piston power generating and working machine A piston machine useful as a power generating machine or a working or pumping machine is disclosed. One or a plurality of double-acting pistons having eccentric piston shafts are guided in cylindrical combustion or working chambers of a machine housing. B... | 01/02/1979 |
| 4088033 | Piston power generating machine A piston-type power generating machine, useful as a prime mover, internal combustion engine, pump or the like, is disclosed wherein a piston having an eccentric center of gravity with respect to its longitudinal axis is reciprocatingly guided in a cylindr... | 05/09/1978 |
| 4043301 | Internal combustion engine An internal combustion engine is disclosed having opposed, axially aligned, annular reciprocating and rotatable pistons connected through radially disposed crankshafts to a drive shaft which extends coaxially of the opposed pistons. The crankshafts are so... | 08/23/1977 |
| 4010675 | Two stroke mechanism with rotary piston and cylinder-piston movement A two stroke mechanism is described which has rotary moveable piston and cylinder-piston elements. The piston and cylinder-piston elements both rotate within a stationary body forming two variable volume chambers. The first variable volume chamber formed ... | 03/08/1977 |
| 3974803 | Internal combustion engine with gyratory piston and cylinder movement An internal combustion engine wherein a piston element with rectilinear sides operates within a movable cylinder-piston element having rectilinear sidewalls, and wherein the combustion chamber has a polyhedral shape. Rotatable crankshafts are mounted in e... | 08/17/1976 |
