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...During the Civil War, the Confederacy established its own Patent Office which issued 266 patents, a third of which concerned implements of war.
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| Number | Title | Issue Date |
| 8167588 | Compressor system and frame A reciprocating compressor is provided with a reciprocating compressor frame which includes a central body and at least two crosshead guides extending from opposite sides of the central body. Additionally, the compressor frame has angled crosshead guide support stru... | 05/01/2012 |
| 7350723 | Cordless, self-contained, handheld spray gun What is disclosed is a self contained, cordless, handheld spray gun (100). The spray gun (100) comprises a fluid container (225) in intercommunication with at least one fluid nozzle orifice (201) and a source of pressurized gas (204 | 04/01/2008 |
| 7318539 | Pump drive unit for battery operated fluid dispensers A battery operated, handheld fluid dispenser comprises a supply container having a body portion and a narrow neck extending upwardly therefrom. A pump and discharge unit is mounted on the upper end of the neck and comprises a pump diaphragm and pump chamber for pump... | 01/15/2008 |
| 6832900 | Piston mounting and balancing system A compact 180° opposed piston pump/compressor minimizes axial spacing between its pistons on the drive shaft and thereby reduces the shaking couple and noise from reciprocation. Each piston has its own eccentric element press-fit into the connecting rods so as not ... | 12/21/2004 |
| 6641377 | Linear compressor with a plurality of support springs and a dual compression unit In a compressor, a yoke constituting a linear drive section together with a driver coil, through which magnetic fluxes from a permanent magnet pass, is integrated with a cylinder and a container. A piston inserted into the cylinder is supported by springs... | 11/04/2003 |
| 6637625 | Continuous positive displacement metering valve A continuous operation metering valve, based on true volumetric positive displacement technology, uses an innovative dual rack and drive pinion design that enables the valve to dispense from one meter chamber while the other meter chamber is filling. This... | 10/28/2003 |
| 6634870 | Hermetic compressor having improved motor cooling A hermetic refrigerant compressor including a compressor mechanism and a motor including a stator surrounded by a rotor attached to a crankshaft drivingly linked to the compressor mechanism. A first gap is formed between the rotor and stator, and a second... | 10/21/2003 |
| 6616420 | Reciprocating piston pump with auxiliary support shaft The invention relates to a pump assembly for a hydraulic brake system with traction control, having an electric motor and a piston pump. To reduce a bearing load, the invention proposes rotatably supporting and thereby radially bracing a motor shaft, or a... | 09/09/2003 |
| 6499972 | Linear compressor A linear compressor, comprises a retaining member, a fixed member supported by said retaining member and formed with a hermetically sealed compression chamber to receive a working fluid therein, a pair of pistons axially movably received in said compressi... | 12/31/2002 |
| 6354818 | Oscillation-type compressor A tightly closed casing has an inside space for storing coolant gas. A block is accommodated in this casing. A motor includes a stator and a mover. A piston is connected to the mover of the motor. A movable element includes the mover of the motor and the ... | 03/12/2002 |
| 5501581 | Magnetic fluid pump and a method for transporting fluid using the same A magnetic fluid pump prevents the generation of particles and impurities, and is useful where particles and impurities are to be kept to a minimum, for instance in a resist coating process for manufacturing a semiconductor device. A pair of solenoid coil... | 03/26/1996 |
| 5263978 | Blood pump for pulsating operation A blood pump housing (43) accommodates at least one piston (21a,21b) driven by a coupling point (19a,19b) on a triangular closed hypocycloidal path (Za, Zb). The piston (21a,21b) is provided for periodically pressing and releasing a ... | 11/23/1993 |
| 4844705 | Suction line adaptor and filter for a hermetic compressor A compressor assembly is disclosed including a compressor mechanism mounted within a hermetically sealed housing. The compressor mechanism includes a crankcase having a suction inlet opening providing communication into a suction cavity within the crankca... | 07/04/1989 |
| 4838769 | High side scotch yoke compressor A compressor assembly is disclosed including a compressor mechanism mounted within a hermetically sealed housing. The compressor mechanism includes a crankcase having a suction inlet opening providing direct communication into a suction cavity within the ... | 06/13/1989 |
| 4836755 | Compressor with balanced flywheel In a low capacity compressor, the shaft (20) of the drive motor carries a fan wheel (42) including a crank pin (46) formed integral therewith. The lower end of a connecting rod (62) is journalled on the crank pin (46). The portion of the fan wheel (42) op... | 06/06/1989 |
| 4753581 | Constant suction pump for high performance liquid chromatography A multi-lobe gradient cam for a high performance liquid chromatography pump for controlling proportions of HPLC solvents on the low pressure side of the pump. The gradient cam is non-concentric, and has an upward or draw gradient ridge over a majority of ... | 06/28/1988 |
| 4718832 | Electromagnetic reciprocating pump Electromagnetic reciprocating pump including a plurality of pumps combined in such a manner that the mode of connection between the suction inlet and the discharge outlet in each of the pumps is allowed to be changed and, as the result, the amount of suct... | 01/12/1988 |
| 4671745 | Magnetically-activated motorized pump A magnetically-actuated, motorized pump includes a plurality of cylinders extending at radially-spaced intervals between first and second heads. Each cylinder reciprocably receives a piston assembly including a pair of permanent magnets with outwardly-ext... | 06/09/1987 |
| 4648809 | Device for conveyance of a pressure medium, especially oil A device for conveyance of a pressure medium, especially pressure oil, has an electric motor with a vertical shaft and a pump driven by this shaft. The housing has a bottom part. To absorb the operational noises of the device, the bottom part is construct... | 03/10/1987 |
| 4615661 | Magnetic pump A magnetic pump having a housing or block with three compartments and a port for supplying fluid into the center compartment. A pair of receivers are mounted in the center compartment and have check valves to allow fluid to flow into the receivers and out... | 10/07/1986 |
| 4597720 | Cleaning apparatus for the wet cleaning of building walls and floors, swimming pools, automobiles and the like A cleaning apparatus for wet cleaning building walls and/or floors and the like by means of high-pressure jet of cleaning liquid, which includes a pump driven by an electromotor. The pump and the electromotor are carried on a common shaft formed with a ce... | 07/01/1986 |
| 4594056 | Hydraulic pump unit A hydraulic pump unit, comprising an electric motor, the stator (5) of wh is disposed in a housing defining an oil reservoir and the rotor of which is mounted on a shaft which drives a hydraulic pump. Each front end of said stator is associated with an e... | 06/10/1986 |
| 4544334 | Mechanical means for holding air gaps on bolt-down stators in refrigerant compressors A refrigerant compressor (10) including a compression mechanism (18) resiliently supported within a sealed outer casing (12) is provided with means for maintaining the air gap between the rotor (40) and stator (42) of the electric drive motor (20) for the... | 10/01/1985 |
| 4518326 | Hermetic motor compressor for refrigeration systems and the like The motor compressor comprises a hermetic casing in which are mounted a reciprocating compressor and a reversible electric motor having a common vertical shaft with an axial duct for conveying lubricating oil from a centrifugal pump located at the lower e... | 05/21/1985 |
| 4518317 | Fluid pumping system A fluid pumping system including a variable-volume, fluid-reception chamber having an inlet conduit leading from a fluid supply site and an outlet conduit leading to a fluid delivery site. An elongated plunger body is drivingly coupled with the chamber an... | 05/21/1985 |
| 4470772 | Direct suction radial compressor A direct suction radial compressor having a crankcase therein dividing the compressor into an upper chamber and a lower chamber sealed one from the other, and suction inlet tubing extending through the top portion of the upper chamber for delivering refri... | 09/11/1984 |
| 4396361 | Separation of lubricating oil from refrigerant gas in a reciprocating compressor A hermetically sealed reciprocating motor compressor unit including a sealed shell. Discharge gas from the compressor is passed through the motor via suitable flow passages. The top of the motor and the interior surface of the shell define a chamber there... | 08/02/1983 |
| 4365942 | Liquid helium pump A pump includes a pump housing defining a pumping chamber and having two opposite end walls and a piston arranged in the pumping chamber for alternating motion towards and away from the end walls for drawing a cryogenic liquid into and driving it out of t... | 12/28/1982 |
| 4358254 | Variable capacity compressor A variable capacity compressor for refrigeration systems such as air conditioners and heat pumps comprising an outer casing having a lubricant sump in the lower portion thereof, a crankcase internally spring mounted within the outer casing and having a pa... | 11/09/1982 |
| 4355960 | Compressor refrigeration system utilizing thermally stable refrigeration lubricants containing alkyl polyhalophenyl ethers A compressor refrigeration system employing a halocarbon refrigerant, has a lubricant composition in contact with the halocarbon refrigerant over the expected temperature range of the system, the lubricant composition having lubricity and chemical and the... | 10/26/1982 |
| 4252506 | Variable capacity compressor A variable capacity compressor for refrigeration systems such as air conditioners and heat pumps comprising an outer casing having a lubricant sump in the lower portion thereof, a crankcase internally spring mounted within the outer casing and having a pa... | 02/24/1981 |
| 4200426 | Hermetic compressor assembly including torque reaction leaf spring means A hermetic compressor assembly is disclosed wherein a motor-compressor unit is supported in a hermetically sealed chamber so as to permit at least limited rotation thereof about an axis which may coincide with the axis of the drive shaft of the compressor... | 04/29/1980 |
| 4152956 | Compressor for air-conditioning devices for vehicles An improved vehicle driven air conditioning compressor having a rotatable crankshaft and eccentric reciprocating pistons in which there is provided a spring system connected to the eccentric in such a manner that peak valves of torque during compression a... | 05/08/1979 |
| 4127360 | Bumpless pump apparatus adjustable to meet slave system needs Pumping apparatus which incorporates connected piston type positive displacement, slip free pumps is disclosed. They provide pumped outputs at a common displacement rate. They run out of phase to one another so that while one is pumping, the other is able... | 11/28/1978 |
| 4089624 | Controlled pumping system A pumping system for dispensing controlled and variable amounts of fluids in predetermined quantities includes a pump piston which moves axially in a pump chamber. The piston is reciprocated by a drive lead nut cooperating with a non-rotatable lead screw ... | 05/16/1978 |
| 4033707 | Refrigeration compressor structures and their methods of construction A motor driven refrigeration compressor having a cylinder head and base of laminated construction. The laminations are formed from flat sheet stock with apertures which define inlet and outlet ports and passages for refrigerant flow. The base is bell shap... | 07/05/1977 |
