Did You Know...
...that the inventor of the electric motor was a blacksmith named Thomas Davenport? Described as "a brilliantly unsuccessful inventor", Davenport invented the first rotary electric motor. In 1836 he headed out -- on foot -- from his Vermont home to file a patent application at the Patent Office in Washington, D.C. By the time he got there, he had squandered away his money and couldn't afford the $30 filing fee so he turned around and went home. When he later mailed in his application with money he'd raised, the Patent office was destroyed in a fire. He did finally get credit for his invention on Feb. 5, 1837.
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| Number | Title | Issue Date |
| 8186978 | Pump with linear actuator A pump includes a housing with a pumping chamber, first and second check valves, and an inlet and an outlet in fluid communication with the pumping chamber through the check valves. The housing also includes a linear actuator with a pumping element located in the pu... | 05/29/2012 |
| 8157549 | Multi-channel fluid conveying apparatus A multi-channel fluid conveying apparatus, for delivering a fluid, includes a valve seat, a valve cover, a valve membrane, a plurality of temporary-deposit chambers, and an actuating device. The valve seat includes at least one inlet channel and at least one outlet ... | 04/17/2012 |
| 8128385 | Valve structure A valve structure includes a partition wall, a communicating bore, a valve body and a restraining portion. The partition wall is provided in a fluid container for dividing the fluid container into a first fluid chamber and a second fluid chamber. The communicating b... | 03/06/2012 |
| 8096791 | Suction valve for a small hermetic compressor A suction valve for a small hermetic compressor formed as a flexible vane having a fixed end portion, a bending median portion and a sealing end portion with the distance between the external edge portion of the vane and an internal edge portion of the vane. ... | 01/17/2012 |
| 8075287 | Fluid pump having plunger and method of monoblock casting for housing of the same A fluid pump includes a plunger that is movable to pressurize fluid drawn from an inlet into a compression chamber. The plunger is substantially axially movable in a cylinder. Fluid pressurized in the compression chamber is discharged through an outlet. The inlet an... | 12/13/2011 |
| 7934913 | Piston compressor, particularly a hermetic refrigerant compressor The invention concerns a piston compressor, particularly a hermetic refrigerant compressor, with a compression chamber, which is limited by a valve plate arrangement having a valve plate with a suction gas opening and a pressure gas opening, a suction valve plate wi... | 05/03/2011 |
| 7850437 | Multi-port suction reed valve with optimized tips A reed valve having a plurality of tips and associated recesses is provided as a compressor suction valve with each valve tip coacting with a suction port. The recesses are located in the housing structure defining the cylinder of the compressor and are spaced a dis... | 12/14/2010 |
| 7413421 | Multi-cylinder reciprocating compressor A multi-cylinder reciprocating compressor has a plurality of compression chambers and a plurality of discharge valve devices associated with the respective compression chambers. Each discharge valve device includes a valve reed for opening and closing a correspondin... | 08/19/2008 |
| 7390177 | Piston compressor, particularly a hermetic refrigerant compressor The invention concerns a piston compressor, particularly a hermetic refrigerant compressor, with a compression chamber, which is limited by a valve plate arrangement having a valve plate with a suction gas opening and a pressure gas opening, a suction valve plate wi... | 06/24/2008 |
| 7390178 | Compressor A compressor comprises a plurality of pairs of a cylinder bore and a piston moving reciprocally in the cylinder bore, a valve plate provided with a plurality of outlet holes for leading pressurized gas in the cylinder bores to the outside, a plurality of strap-shape... | 06/24/2008 |
| 7390176 | Multi-port suction reed valve with optimized tips A reed valve having a plurality of tips and associated recesses is provided as a compressor suction valve with each valve tip coacting with a suction port. The recesses are located in the housing structure defining the cylinder of the compressor and are spaced a dis... | 06/24/2008 |
| 7387221 | Fluid discharge pumping apparatus A fluid discharge pumping apparatus includes: a drive mechanism; a cylinder; an outflow valve mechanism and an inflow valve mechanism coupled to the cylinder; a piston member inside the cylinder; and a piston-supporting member attached to the piston member driven by... | 06/17/2008 |
| 7367789 | Device for maintaining a static seal of a high pressure pump A pressure enclosure includes a first component having an opening, a second component coupled to the first component in a position over the opening, a third component positioned between the first and second components and covering the opening, and a load chamber def... | 05/06/2008 |
| 7364412 | System, method, and apparatus for valve stop assembly in a reciprocating pump A reciprocating pump assembly has a pump housing with a crankshaft. A plunger is connected to the crankshaft for pumping a fluid through a cylinder. The cylinder has a fluid inlet port and an opening that provides access to the cylinder. A suction cover is mounted i... | 04/29/2008 |
| 7351044 | Multi-stage piston type compressor In order to achieve a high level of impermeability with a low closing force for the sealing elements of a multistage piston compressor, the overflow channel (19) in the valve piston (9) opens into at least two passages (26, 27) and the sealing p... | 04/01/2008 |
| 7346950 | Inflatable product provided with electric air pump An inflatable product includes a first chamber, a pack, and a fan and motor received in the pack. The pack has an air intake connected to the outside of the first chamber and a first air outlet connected to the inside of the first chamber. A first valve for opening ... | 03/25/2008 |
| 7341435 | Fluid end A fluid end for a high-pressure pump including a unitary body with a plurality of horizontal passages each for receiving a reciprocating plunger at one of its ends and a pressure relief valve at the other of its ends. The body is provided with a corresponding number... | 03/11/2008 |
| 7335002 | Fluid end A fluid end for a high-pressure pump including a unitary body with a plurality of horizontal passages each for receiving a reciprocating plunger at one of its ends and a pressure relief valve at the other of its ends. The body is provided with a corresponding number... | 02/26/2008 |
| 7313837 | Inflatable product provided with electric air pump An inflatable product that includes a chamber and an electric air pump for inflating the chamber. The air pump has an air intake and an air outlet. The air intake is connected to the outside of the chamber and the air outlet is connected to the inside of the chamber... | 01/01/2008 |
| 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 |
| 7296980 | Intake valve for a high-pressure pump, in particular for internal combustion engine fuel An intake valve for a high pressure pump for internal combustion engine fuel having a valve body having a seat with which cooperates a shutter kept closed by a first spring of substantially constant pressure and by a second spring varying in pressure during at least... | 11/20/2007 |
| 7284971 | Hermetic compressor A hermetic compressor comprising a discharge valve, and a stopper for restricting an opening degree of the discharge valve. The discharge valve includes a body portion configured to cover a discharge port formed at a valve plate, and a first protrusion extending fro... | 10/23/2007 |
| 7275561 | Discharging valve assembly of reciprocating compressor A discharging valve assembly for a reciprocating compressor includes a discharging cover coupled with a front frame so as to cover a cylinder in which a piston is inserted; a discharging valve inserted in the discharging cover, and opening/closing an inner space of ... | 10/02/2007 |
| 7273355 | Compressor assembly with piston having multiple cross sections A compressor assembly having a piston with multiple cross sections. The compressor assembly, in one form thereof, includes a cylinder block defining a cavity. A piston is at least partially disposed in the cavity and reciprocates along a central axis of the cavity. ... | 09/25/2007 |
| 7247006 | Method and apparatus for sealing an ultrahigh-pressure fluid system An ultrahigh-pressure fluid system, such as an ultrahigh-pressure fluid pump, includes an improved dynamic seal assembly that can withstand pressures above 40,000 psi, and more preferably, pressures up to and beyond 87,000 psi. The dynamic sealing assembly includes ... | 07/24/2007 |
| 7234239 | Hair removing device with a lotion applicator A hair removing device with a lotion applicator includes a housing, a hair removing head mounted to the housing and adapted to be held against a user's skin for hair depilation or hair epilation, an applicator which dispenses a lotion on the user's skin, a tank hold... | 06/26/2007 |
| 7232294 | Compressor having a discharge valve mechanism including a valve retainer having a specially-designed curved surface In a compressor having a discharge valve mechanism, a valve retainer has a curved surface which is faced to and spaced from a movable portion of a flexible plate-like discharge valve and adapted to limit the movement of the movable portion. In a first direction para... | 06/19/2007 |
| 7232293 | Manual hydraulic pump A manual hydraulic pump includes a cylinder block 10 and an end block 8. The rear end of the cylinder block 10 and the end block 8 defines an end space 21 between them. The cylinder block 10 has cylinders 13 and oil p... | 06/19/2007 |
| 7220109 | Pump cylinder seal A compact opposed piston pump 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 to occupy space b... | 05/22/2007 |
| 7214040 | Cylinder head arrangement for a piston compressor The invention relates to a cylinder head arrangement for a piston compressor, particularly for a hermetically enclosed refrigerant compressor, with a valve plate, a suction gas channel, a discharge chamber and a retainer element for a discharge valve. It is endeavou... | 05/08/2007 |
| 7210912 | Reciprocating piston compressor having improved noise attenuation A reciprocating piston compressor having a suction muffler and a pair of discharge mufflers to attenuate noise created by the primary pumping frequency in the primary pumping pulse. The suction muffler is disposed along a suction tube extending between the motor cap... | 05/01/2007 |
| 7210561 | Lubricating device of reciprocating compressor A lubricating device of a reciprocating compressor includes a pumping unit for pumping lubrication oil contained in a lower portion of a case and a front frame having a supply hole which supplies the lubrication oil pumped from the pumping unit to a sliding part wit... | 05/01/2007 |
| 7198475 | Valve assembly in hermetic compressor A valve assembly of hermetic compressor is disclosed, in which a valve insertion groove (44) and (45) are formed. The valve insertion groove (44) includes a suction opening (42) on a head (40) provided between a cylinder (5)... | 04/03/2007 |
| 7186097 | Plunger pump housing and access bore plug Suction valve spring retainers mounted using an access bore plug are described for use in plunger pump housings having an offset access bore and incorporating structural features for stress-relief. These pump housing structural features accommodate access bore plugs... | 03/06/2007 |
| 7175400 | Compressor assembly with reciprocating piston and vented cylinder A compressor assembly including a cylinder block defining first and second cavity portions. A central axis extends through first and second cavity portions. A compressible fluid respectively enters and exits the first cavity portion through an inlet and outlet. A pi... | 02/13/2007 |
| 7168925 | Automatic optimizing pump and sensor system A reciprocating electromagnetic pump comprising a coil wound about a bipolar or tripolar core, a diaphragm structure mechanically coupled to at least one arm with a magnet attached to one end of the arm and a controller electronically connected to the coil. The cont... | 01/30/2007 |
| 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 |
| 7140846 | Vacuum pump having main and sub pumps A vacuum pump having a rotary shaft that is rotated by a drive source has a main pump and a sub pump. The main pump includes a pump chamber and a gas transferring body that is located in the pump chamber. The main pump is driven by the drive source through the rotar... | 11/28/2006 |
| 7134851 | Reciprocating pump having a ceramic piston Various embodiments of the invention, therefore, provide pumps, and methods for their production. One exemplary embodiment of the invention comprises a ceramic plunger pump assembly. The pump assembly can include a pump body, which defines a pump chamber with an inl... | 11/14/2006 |
| 7134849 | Molded disposable pneumatic pump A mechanical pump having a unitary construction such that the fluid being pumped is prevented from leaking without requiring the use of discrete seal elements. The absence of discrete seal elements and integral coupling of various components of the pump substantiall... | 11/14/2006 |
