Did You Know...
...that the Eveready Battery began as an invention called the "electric flowerpot," which was a tube with a battery and light bulb inside? The idea was to fasten this gizmo to the side of a flowerpot so it would illuminate the flowers from the bottom. The idea died on the vine and the businessman who licensed the flower pot, Conrad Huber, was left with a pile of useless tubes -- until he found a way to market them as batteries to light the world!
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| Number | Title | Issue Date |
| 8070461 | Control valve assembly for a compressor unloader A closing element is for a valve assembly of a compressor unloader, the compressor including a casing with a compression chamber, the unloader including a housing defining a chamber. The valve assembly has a base between the compression and unloader chambers, a pass... | 12/06/2011 |
| 7374406 | System and method for reducing noise in multi-capacity compressors A method and system is provided for reducing chatter in multi-capacity compressors having disengageable eccentric structures. The multi-capacity fluid compressor includes a compression chamber having a discharge end and an inner surface. The compressor also includes... | 05/20/2008 |
| 7329105 | Multi-directional pump A multi-directional pump is disclosed generally comprising a housing with inlet and outlet ports, a pumping device disposed therein, a first chamber in fluid communication with the inlet port, and a second chamber in fluid communication with the first chamber. The f... | 02/12/2008 |
| 7303096 | Liquid delivery system A liquid delivery system includes a first reservoir having a first outlet through which liquid is delivered. A first delivery outlet is located at the lower portion of the first reservoir and a vent is included at its upper portion. A second reservoir located above ... | 12/04/2007 |
| 7300576 | Pool cleaning system and safety skimmer A swimming pool cleaning system includes a pump, a first tube coupling a suction port of the pump in fluid communication with a main drain or mobile cleaning device which draws water and settled debris from the bottom of the pool, and a skimming device including an ... | 11/27/2007 |
| 7213275 | Float operated hydraulic suction fuse for swimming pools A hydraulic suction fuse is mounted in a conventional debris collection trap of a swimming pool, spa or the like, to significantly reduce or eliminate any suction force on the bottom or side wall mounted drain of the swimming pool, spa or the like, as a result of th... | 05/08/2007 |
| 7178179 | Anti-entrapment drain A drain for swimming pools, spas, whirlpool baths, etc., includes a plurality of first orifices in communication with corresponding serpentine passageways to minimize hair or a body part from covering and entering the first orifices to a degree sufficient to entrap ... | 02/20/2007 |
| 7168930 | Peristaltic pump with air venting via the movement of a pump head or a backing plate during surgery A peristaltic pump 10 for use in ophthalmic surgery includes a housing 12, a pump head 14 having plurality of rollers 16, a backing plate 18 attached to the housing 12, and a length of surgical tubing 50. The rollers ... | 01/30/2007 |
| 7137788 | Air compressor oil recirculation system An apparatus for removing oil from air in an air compressor that has a piston reciprocable in a cylinder to compress the air, includes an oil removal chamber associated with the compressor. An unloader valve has an unactuated condition and an actuated condition disa... | 11/21/2006 |
| 7089606 | Manually resettable hydraulic suction fuse for swimming pools A hydraulic suction fuse is mounted in a conventional debris collection trap of a swimming pool, spa or the like, to significantly reduce or eliminate any suction force on the bottom or side wall mounted drain of the swimming pool, spa or the like, as a result of th... | 08/15/2006 |
| 7074014 | Dipping type pump where discharging performance at a time of actuation has been improved In a dipping type pump where a rotary shaft extending from a motor into a pump casing disposed in liquid is mounted with impellers, and liquid is sucked from a sucking port at a lower portion of the casing and discharged from a discharge port by rotational driving o... | 07/11/2006 |
| 7055189 | Hydraulic suction fuse for swimming pools A hydraulic suction fuse is mounted in a conventional debris collection trap of a swimming pool, spa or the like, to significantly reduce or eliminate any suction force on the bottom or side wall mounted drain of the swimming pool, spa or the like, as a result of th... | 06/06/2006 |
| 7011507 | Positive displacement pump with a combined inertance value of the inlet flow path smaller than that of the outlet flow path A pump according to the present invention has a circular diaphragm 4 placed at the bottom of a casing 2. At the bottom of the diaphragm 4, a piezoelectric element 6 is installed in contact with the diaphragm 4. A narrow space betwe... | 03/14/2006 |
| 7007828 | Chemical metering pump A liquid chemical metering pump (24) is described that can be fully submerged within a hazardous liquid chemical transport/storage container (28). The pump (24) includes a discharge adaptor (30) that can be received in the outlet aperture... | 03/07/2006 |
| 6769881 | Vacuum preventing device for scroll compressor Disclosed is a vacuum preventing device for a scroll compressor comprising: a housing fixed to an upper surface of a fixed scroll to cover a compression hole and a suction hole and having a discharge hole at an upper surface thereof and a rotation member receiving s... | 08/03/2004 |
| 6607366 | Variable clearance system for reciprocating compressors An unloader system is provided for a reciprocating gas compressor. The system includes an unloader valve assembly including a valve member controlling flow between compressor cylinder and a clearance bottle. Opening and closing of the valve member is cont... | 08/19/2003 |
| 6468052 | Vacuum relief device for fluid transfer and circulation systems A safety device for use in a fluid transfer and/or circulation system of the type which uses a pump to draw water from a reservoir through one or more intake lines each extending from an open end at the reservoir to the pump intake. The safety device conn... | 10/22/2002 |
| 6171073 | Fluid vacuum safety device for fluid transfer and circulation systems A safety device for use in a fluid transfer and/or circulation system of the type which uses a pump to draw water from a reservoir through one or more intake lines each extending from an open end at the reservoir to the pump intake. The safety device conn... | 01/09/2001 |
| 6149401 | Variable discharge-amount compressor for refrigerant cycle A variable discharge-amount compressor includes a compression unit for compressing refrigerant, and a discharge-amount varying unit for varying a discharge amount of refrigerant discharged from the compression unit. The discharge-amount varying unit has a... | 11/21/2000 |
| 6120606 | Gas vent system for a vacuum chamber The present invention provides a gas vent system for a vacuum chamber. The particle placed onto the wafer after loading out from a vacuum chamber can be greatly reduced by the system design. The gas vent system has a gas supply, an anti-vibrating tube, a ... | 09/19/2000 |
| 6109885 | Vacuum System for a transfer system A vacuum system, particularly for vacuum grippers, has a fluid entrainment pump for generating the vacuum which, when the required vacuum is built up, is supplied with a throttled compressed-air flow. For the throttling of the compressed-air flow, a contr... | 08/29/2000 |
| 6109886 | Compressed-air supply installation with reduced idling power A compressed air installation having a normal operating mode and an idling mode includes a feed valve, a feed line which is connected to and receives air through the feed valve, at least one compressor having at least one compression chamber, and at least... | 08/29/2000 |
| 6017195 | Fluid jet ejector and ejection method An improved vacuum apparatus and method is provided which includes a vacuum body, pump or ejector which produces a plurality of high velocity liquid jet streams of a primary fluid (liquid) such as water discharged into a convergent diffuser to draw a seco... | 01/25/2000 |
| 5984645 | Compressor with combined pressure sensor and high pressure relief valve assembly A combined compressor pressure sensor and excess pressure relief valve (12) uses a formed disk (22) that snaps down and back up at a pair of predetermined pressures. The disk (22), when it snaps down, opens a plug (34) to in turn allow excess pressure fro... | 11/16/1999 |
| 5947700 | Fluid vacuum safety device for fluid transfer systems in swimming pools A safety device for use in a fluid transfer system for a swimming pool or similiar application, having a pump which draws water from a reservoir through one or more intake lines each extending from an open end at the reservoir to the pump intake. The devi... | 09/07/1999 |
| 5947923 | Breast pump A breast pump for sucking out mother's milk is provided, the breast pump including a sucking portion 11, 12, 13 to be fitted to one's breast, a negative pressure generating member 14 mounted in the sucking portion for generating negative pressures therein... | 09/07/1999 |
| 5865568 | Method of and device for suction transporting In a method of and a device for suction transporting a material from an object surface, the suction transporting device has a suction unit and a unit for modulating the suction. A suction is applied to a transporting line by the suction unit so that a mat... | 02/02/1999 |
| 5794915 | Safety relief valve assembly for a fluid displacement apparatus A safety relief valve assembly for use in a fluid displacement apparatus of an automotive air conditioning system includes a valve mechanism which releases gas when the pressure in the fluid displacement apparatus increases above a predetermined pressure ... | 08/18/1998 |
| 5730585 | Apparatus for vacuum absorption with retracting reverse flow protection device An apparatus for vacuum absorption is provided which is quiet and simplified with maintaining an absorption power. The apparatus comprises: a tank for accumulating circulating water; a waterway for circulating the circulating water by a pump disposed at a... | 03/24/1998 |
| 5639224 | Device for monitoring pressure or temperature in a compressor The inventive device produces compressed gas. It is provided with a compressor, wherein the compressor has a compression chamber (25), a suction chamber (10) and a pressure chamber (6). The compression chamber (25) can be connected to the suction chamber ... | 06/17/1997 |
| 5503537 | Gas compressor The present invention relates to a gas compressor which prevents noise being produced in the suction conduit during idling. In conventional systems, the noise results from the collision of arriving and returning gas by means of a check valve provided betw... | 04/02/1996 |
| 5472318 | Rupture disk pressure relief assembly for a paint pump A pressure relief assembly for use with a paint pump having a chamber with a pressure relief port located immediately adjacent an inlet port of the pump. The pressure relief assembly includes a mounting member, inlet washer, rupture pad and outlet washer.... | 12/05/1995 |
| 5201877 | Suction transporting device A suction transporting device for transporting a material has a suction unit, a transporting line connected with the suction unit and having an inlet for receiving a material to be transported and an outlet for discharging the material to be transported a... | 04/13/1993 |
| 4940397 | Fuel pump having a pressure chamber vented via a ball valve to the fuel tank A fuel pump includes a connecting pipe having an open end disposed at the lowest point in a pressure chamber supplied with fuel by a pressure valve. The connecting pipe is connected to a mixture-former and the pressure chamber has in its upper region a ba... | 07/10/1990 |
| 4743169 | Diaphragm-type vacuum pump device A diaphragm-type vacuum pump device which includes a diaphragm, a pumping chamber the volume of which is changed by reciprocating motion of the diaphragm, a check valve for drawing air into the pumping chamber, a check valve for discharging air from the p... | 05/10/1988 |
| 4725204 | Vacuum manifold pumping system Vacuum pumping system comprises a plurality of vacuum processing vessels, semiconductor processing reactors, and the like, connected to a common manifold evacuated by a generously large central vacuum unit. The manifold is maintained at a substantially co... | 02/16/1988 |
| 4529364 | Casing gas pump A casing gas pump is reciprocated by the pump jack of an oil well. Push rods slidable within rigid vertical cylinders are connected by a bridle bracket to bridle cables depended from the pump jack horsehead. Vertical reciprocation of the horsehead moves p... | 07/16/1985 |
| 4412790 | Balanced supplemental water bleed for suction dredgers Method and device for safeguarding hydraulic transport of a suspension of edging spoil and water by supplementing a dosed water amount onto the suction side of the pump, whereas as much and as long as possible suction power is maintained in the suction du... | 11/01/1983 |
| 4366834 | Back-flow prevention valve A back-flow prevention valve assembly is disclosed for use with a vacuum pump or the like and employs a valve element movable between positions opening or closing a passageway through the assembly. In the event of pump failure, a control valve, which is o... | 01/04/1983 |
| 4097200 | Self-pressurization system for gearboxes and the like For gear boxes, constant speed drives and the like having an airtight housing, a self-pressurization system includes a source of liquid, a pump having a discharge port connected to the housing, a check valve in a conduit extending between atmosphere and t... | 06/27/1978 |
