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 |
| 7789634 | Compressor A reed valve and a valve retainer for the reed valve are provided at a discharge port of a compression mechanism that compresses fluid. The valve retainer has a polymer actuator at an end part of a valve fixing part for fixing the reed valve. The polymer actuator ex... | 09/07/2010 |
| 7628590 | Method and apparatus for reducing free flow risk A technique for reducing the risk of free flow through a pump is disclosed. The technique includes sensing a pressure difference between the pump inlet and outlet. The pressure difference is mechanically communicated to a flow restricting element. The flow restricti... | 12/08/2009 |
| 7278639 | Edge coated gaskets and method of making same An edge coated gasket includes a base sheet made of compressible gasket material and having opposed faces and an interior edge surrounding and defining an aperture. An edge coating of polymer or other material is disposed on and seals the interior edge of the base s... | 10/09/2007 |
| 7273026 | Roller follower body The present invention relates to a roller follower, comprising an outer surface, enclosing a first cavity, a second cavity, and a transition opening, wherein the first cavity includes a first inner surface configured to house a cylindrical insert the second cavity i... | 09/25/2007 |
| 7251983 | Secondary containment system and method A pump housing that contains a pump that draws fuel from an underground storage tank containing fuel to deliver to fuel dispensers in a service station environment. The pump is coupled to a double-walled fuel pipe that carries the fuel from the pump to the fuel disp... | 08/07/2007 |
| 7069741 | Economizer chamber for minimizing pressure pulsations A baffle for use in a refrigerator apparatus comprises a baffle plate comprising a first and a second opposing sides attached to an inner surface of the refrigerator apparatus, a baffle seal plate attached along a third side of the baffle plate, the baffle plate sea... | 07/04/2006 |
| 7059366 | Air bleed mechanism for a submersible turbine pump A manifold for a submersible turbine pump having an air bleed mechanism for removing air from a discharge chamber of the manifold. The manifold includes the discharge chamber that receives fuel pumped from an underground storage tank (UST), the air bleed mechanism, ... | 06/13/2006 |
| 7059838 | Control device for positive displacement pumps A control device for a positive displacement pump includes a throttle device and a flow control valve. The flow control valve includes a flow control piston and is configured to regulate an unrequired excess flow of the pump at an increased speed. The throttle devic... | 06/13/2006 |
| 7048517 | Pump as a pressure source for supercritical fluid chromatography The invention is a device and method in a high-pressure chromatography system, such as a supercritical fluid chromatography (SFC) system, that uses a pump as a pressure source for precision pumping of a compressible fluid. The preferred exemplary embodiment comprise... | 05/23/2006 |
| 7048000 | Pressure reducing valve A pressure reducing valve includes a housing having a passage therein, a valve body disposed within the passage, and a piston slideably disposed within the passage. The valve body includes a wall arranged transverse to the passage and dividing the passage into an in... | 05/23/2006 |
| 7048801 | Chemical pump and method of discharging chemical solution A chemical pump includes a pressure chamber, a partition member for dividing the pressure chamber into a cleaning pressure chamber and a discharging pressure chamber, a filter part disposed on the primary side of the discharging pressure chamber, and a single drive ... | 05/23/2006 |
| 7014193 | Gasket with selectively positioned seal enhancement zones A gasket with selectively positioned seal enhancement zones located in the web of the gasket is provided. The gasket is formed of a base sheet of gasket material cut to define an interior aperture bounded by an interior edge and webs. Slots are formed at selected lo... | 03/21/2006 |
| 6984113 | Oil pressure operated pump for marine steering gears with a valve set shell with valves separately capable of assembly with the valve housing An oil pressure operated pump for marine steering gears includes a multiple piston oil pressure operated pump controlled by a steering wheel, a valve housing mounted under the pump, a bottom cover closing the valve, the valve housing and the cover each including cha... | 01/10/2006 |
| 6974054 | Service station leak detection with recovery system A fueling environment distributes fuel from a fuel supply to fuel dispensers in a daisy chain arrangement with a double-walled piping system. Fuel leaks that occur within the double-walled piping system are returned to the underground storage tank or a sump proximat... | 12/13/2005 |
| 6966195 | Air conditioning system To provide an air conditioning system which simultaneously eliminates shortage of lubricating oil of a variable displacement compressor and degradation of cooling efficiency of the system. An air conditioning system is configured to have a variable displacement comp... | 11/22/2005 |
| 6964559 | Two shaft vacuum pump with cantilevered rotors A vacuum pump (1) comprising a pump chamber casing (5) accommodating two co-operating rotors (2, 3) which are respectively arranged on a shaft (8, 9). A bearing/gear chamber (6) is disposed adjacent to the pump chamber casing (5... | 11/15/2005 |
| 6962269 | Service station leak detection and recovery system A fueling environment that distributes fuel from a fuel supply to fuel dispensers in a daisy chain arrangement with a double walled piping system. Fuel leaks that occur within the double walled piping system are returned to the underground storage tank by the outer ... | 11/08/2005 |
| 6948915 | Oil free screw compressor A screw compressor includes a compressor main body, a male rotor having a screw-like male tooth shape and a female rotor having a screw-like female tooth shape meshing with the screw-like male tooth shape or the male rotor. The male and female motors are provided wi... | 09/27/2005 |
| 6935847 | Spontaneous inflation inhibitor for inflatable prosthesis A pump assembly for a penile implant is provided having a mechanism which prevents spontaneous inflation of the cylinders implanted within the user. The preventative mechanism uses overpressure generated by the reservoir during unintentional compression to effective... | 08/30/2005 |
| 6935161 | Service station leak detection and recovery system A fueling environment distributes fuel from a fuel supply to fuel dispensers in a daisy chain arrangement with a double-walled piping system. Fuel leaks that occur within the double-walled piping system are returned to the underground storage tank or a sump proximat... | 08/30/2005 |
| 6923998 | Edge coated gaskets and method of making same An edge coated gasket includes a base sheet made of compressible gasket material and having opposed faces and an interior edge surrounding and defining an aperture. An edge coating of polymer or other material is disposed on and seals the interior edge of the base s... | 08/02/2005 |
| 6884041 | Electromagnetic valve-controlled fuel injection pump for internal combustion engines, especially diesel engines A solenoid-valve-controlled fuel-injection pump for internal combustion engines, in particular diesel engines, has a solenoid valve, whose valve needle separates a high-pressure region from a low-pressure region, i.e. connects the high-pressure region and low-pressu... | 04/26/2005 |
| 6854962 | Pump system with high pressure restriction A pumping system for a fuel injection system includes a body defining a high pressure pumping chamber, a plunger, a high pressure outlet, a high pressure fluid line connecting the pumping chamber to the outlet, a control valve along the fluid line, and a valve and r... | 02/15/2005 |
| 6648609 | Pump as a pressure source for supercritical fluid chromatography involving pressure regulators and a precision orifice The invention is a device and method in a high-pressure chromatography system, such as a supercritical fluid chromatography (SFC) system, that uses a pump as a pressure source for precision pumping of a compressible fluid. The preferred exemplary embodime... | 11/18/2003 |
| 6638030 | Oil free screw compressor A screw compressor includes a compressor main body, a male rotor having a screw-like male tooth shape and a female rotor having a screw-like female tooth shape meshing with the screw-like male tooth shape or the male rotor. The male and female motors are ... | 10/28/2003 |
| 6626643 | Twin vane pump apparatus for dispensing meat products An apparatus and method for producing predetermined quantities of a meat product, inc which the apparatus comprises a twin vane concentric pump with an inlet and an outlet circumferentially spaced from one another, and a pair of independently movable vane... | 09/30/2003 |
| 6582209 | Fuel injection system for internal combustion engines A fuel injection system for internal combustion engines essentially has a high-pressure injection pump, supplied with fuel from a low-pressure region, and a magnetic piston valve serving to control the injection pump. The magnetic valve having two coaxial... | 06/24/2003 |
| 6506027 | Two stage compressor and a method for cooling such a compressor A helical screw compressor is provided having a first compressor stage and a second compressor stage. The helical screw compressor includes a first male rotor and a first female rotor in the first compressor stage, and a second male rotor and a second fem... | 01/14/2003 |
| 6471492 | Oil free screw compressor An oil free screw compressor includes a compressor main body directly connected to a high speed motor via a drive side gear and a driven side gear having a uniform speed ratio. A bearing in a side of the high speed motor employs one having the same size a... | 10/29/2002 |
| 6464470 | Scroll compressor with variable discharge port A variable size is provided for a discharge port in a scroll compressor. The variable size is movable dependent on conditions within the scroll compressor to achieve a desired pressure ratio based upon operational conditions in the compressor or an associ... | 10/15/2002 |
| 6447263 | Fuel pump with auxiliary pumping chamber A fuel pump includes a pumping plunger reciprocable within a bore formed in a pump housing under the influence of a cam drive arrangement. The cam drive arrangement includes a reciprocable tappet member, a surface associated with the tappet member definin... | 09/10/2002 |
| 6428285 | Hydraulic delivery device The invention relates to a hydraulic delivery device with a displacement unit which delivers a medium from a suction connection under output pressure to a pressure connection, connectable with a consumer, and under consumer pressure, and a regulating devi... | 08/06/2002 |
| 6416299 | Motorcycle oil pump A motorcycle oil pump that provides a fixed shaft with high volume rotor gears and adjustable oil pressure.... | 07/09/2002 |
| 6345959 | Pump with integral pilot operated priority pressure regulating valve A fluid pump has a housing (4), a main output port (10), an auxiliary output port (14) and a priority pressure regulating valve contained with the housing (4). The priority pressure regulating valve has a spool (20) to direct fluid to one or both of the o... | 02/12/2002 |
| 6312232 | Method and apparatus for suppressing resonance A compressor includes a discharge chamber into which pressurized refrigerant gas is intermittently discharged. The pressurized refrigerant gas in the discharge chamber is sent to an external refrigerant circuit. A chamber for accommodating a resonance sup... | 11/06/2001 |
| 6287088 | Oil free screw compressor An oil free screw compressor includes a compressor main body directly connected to a high speed motor via a drive side gear and a driven side gear having a uniform speed ratio. A bearing in a side of the high speed motor employs one having the same size a... | 09/11/2001 |
| 6261068 | Gas compressor A gas compressor includes a compression chamber, an outlet valve, and a shuttle valve which disables the outlet valve when it is connected to an atmospheric pressure relief chamber in idle operation. A throttle line circumventing the shuttle valve is prov... | 07/17/2001 |
| 6238190 | Fuel injection pump and snubber valve assembly A fuel injector pump for an internal combustion engine including a camshaft-driven fuel delivery plunger, a solenoid valve for controlling transfer of liquid fuel from a fuel plunger cavity to a fuel injector nozzle, and a snubber valve located between th... | 05/29/2001 |
| 6149384 | Centrifugal pump A centrifugal pump has a casing, an overhung-mounted rotor in the casing having a feed chamber, which centrifugally accelerates the liquid flowing centrally to it, and a discharge chamber positioned axially behind it and connected to the feed chamber in t... | 11/21/2000 |
| 6126409 | Integral housing unit having a lockdown check valve and a pressure relief valve for a submersible pump and method of assembling the same A manifold assembly includes a housing unit which has a check valve assembly and a pressure relief valve assembly formed in one integral unit. When the check valve is in a closed position, the dispensing line is sealed off from the pumping assembly. In ad... | 10/03/2000 |
