Bizarre Patents
Wearable Device For Feeding and Observing Birds and Other Flying Animals
A device for feeding and observing flying animals comprising a hat, a support mounted on the hat and extending outward from the hat, and a feeder mounted on the support.
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| Number | Title | Issue Date |
| 7310965 | Compressor head, internal discriminator, external discriminator, manifold design for refrigeration recovery apparatus The compressor head, internal and/or external discriminator, and manifold design in general utilize ball valves on the suction and discharge of a cylinder head in the recovery of refrigerant liquid and/or vapor. The device facilitates the flashing of liquid refriger... | 12/25/2007 |
| 7159412 | Compressor head, internal discriminator, external discriminator, manifold design for refrigeration recovery apparatus The compressor head, internal and/or external discriminator, and manifold design in general utilize ball valves on the suction and discharge of a cylinder head in the recovery of refrigerant liquid and/or vapor. The device facilitates the flashing of liquid refriger... | 01/09/2007 |
| 7073346 | Compressor head, internal discriminator, external discriminator, manifold design for refrigerant recovery apparatus and vacuum sensor The compressor head, internal and/or external discriminator, and manifold design in general utilize ball valves on the suction and discharge of a cylinder head in the recovery of refrigerant liquid and/or vapor. The device facilitates the flashing of liquid refriger... | 07/11/2006 |
| 6953098 | Hydraulic drill string accumulator A hydraulic accumulator for use in a drill string having a fluid passage for supply of fluid to a hydraulic drill string tool is provided. The accumulator comprises a body provided with connecting means for connecting the accumulator to the drill string and an expan... | 10/11/2005 |
| 6941852 | Unitary hollowed piston with improved structural strength A unitary, “hollow out” piston is molded or forged with only two tools, which move along a single parting direction, with a pair of arcuate side walls that provide maximal outer surface area with minimal thickness and weight. The thin walls are internally fortif... | 09/13/2005 |
| 5941161 | Piston type compressor A compressor having a cylinder bores and pistons are disclosed. Each piston moves in the associated cylinder to compress gas therein. Each piston slides on an inner peripheral wall of an associated cylinder to seal a compression chamber. Each piston inclu... | 08/24/1999 |
| 5794516 | Piston for a self-lubricating, fluid-actuated, percussive down-the-hole drill A piston for a fluid-actuated, percussive, down-the-hole drill is provided with self-lubricating bearings and self-lubricating seals. The piston includes an elongated body member terminating in a front end and a back end and having a longitudinal bore the... | 08/18/1998 |
| 5727930 | Valves and rod assembly A hollow through-bolt is threaded internally and externally, at one end, to receive therein a reciprocable, end-threaded rod. A pair of fluid-control valves, centrally bored, are mounted on the through-bolt in spaced apart disposition. The other end of th... | 03/17/1998 |
| 5495790 | Piston catcher for a pyrotechnic linear piston and cylinder drive In a pyrotechnic linear piston and cylinder drive in a belt pretensioner, the cylinder (10) has a frustoconical free end (12) and the piston (14) is attached to the end of a cable (16). The piston (14) is tapered frustoconically at its end adjacent to the... | 03/05/1996 |
| 5287829 | Fluid actuators A fluid actuator (10) including a chamber (14) in which a piston assembly (17) reciprocates. The piston assembly (17) includes a pair of spaced pistons (18, 19) which divide the chamber (14) into three sections (20, 21, 22) and a passageway (29) which sup... | 02/22/1994 |
| 5113747 | High pressure piston sealing system and method of its assembly The present invention relates to a high pressure piston sealing system. More particularly, the present invention relates to a sealing system adopted for rigorous marine applications which prevent or inhibit the use of a seal lubricant.... | 05/19/1992 |
| 4799421 | Hydrodynamic spiral-grooved journal bearing for electromagnetically rotated and reciprocated compressor piston A free-piston Stirling machine has a piston which can reciprocate and also rotate within a cylinder and which is supported and centered in the cylinder by a grooved dynamic bearing, the piston having two end faces which are acted upon during operation by ... | 01/24/1989 |
| 4729291 | Gas compressor The Compressor is small, compact and lightweight in that it is formed of the barest essentials. It has a pair of in-line cylinders, with pistons reciprocatable therein, and the crankshaft, having only one crank, is drivingly coupled to one of the pistons.... | 03/08/1988 |
| 4691621 | Piston-and-cylinder arrangement with radially-yieldable piston head An improved piston-and-cylinder arrangement has a pressure-balanced piston head mounted on an actuator rod. The piston head is mounted for axial movement with the rod, and for radial movement relative thereto. Three annular ring-type seals are provided be... | 09/08/1987 |
| 4519119 | Method of manufacturing a piston for a swash plate type compressor A piston for a swash plate type compressor is disclosed in which a plurality of similar pistons are reciprocated to provide a compressing operation by means of a swash plate which is mounted on the drive shaft and rotated in the compressor cylinder. The p... | 05/28/1985 |
| 4457423 | Conveyor system A conveyor system is designed for moving loads along a curved path and takes the form of a guide pipe having within it a piston-like driver which may be shuttled from one end to the other thereof by forcing driving fluid, as for example water and oil, int... | 07/03/1984 |
| 4428276 | O-Ring seal for piston of double-acting fluid pressure cylinder A double-acting pneumatic cylinder has a housing with a cylindrical chamber therein. A cylindrical piston is supported coaxially in the chamber for movement axially thereof and has a circumferential groove in the outer surface thereof. A pair of spaced, f... | 01/31/1984 |
| 4410300 | Oil well rabbit A free piston rabbit for an oil and gas well having gas seal and rotation features which improve its operation, reliability and durability. Circumferential grooves on the body of the rabbit have a turbulence-inducing configuration which improves their gas... | 10/18/1983 |
| 4409947 | Exhaust gas recirculating type diesel engine An exhaust gas recirculating type diesel engine wherein part of the exhaust gas is recirculated from its exhaust system to its intake system. An annular groove is formed on the circumferential surface of the piston, and a ring for preventing small particl... | 10/18/1983 |
| 4305448 | Servo control mechanism for a curtain A servo control mechanism for controlling the reciprocal movement of a piston member along the length of a curtain rod. The curtain rod is composed of a fluid pressure-tight tubular member made of a nonmagnetic material and having pressurized fluid supply... | 12/15/1981 |
