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A self defense weapon formed as a memo pad and which is easily held by a person's fingers, therefore making it possible to provide protection from a mugger and also to quickly and easily write a record or a message without failure of missing or forgetting significant information under a stressful situation.
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| Number | Title | Issue Date |
| 8162623 | High-pressure liquid supply pump An object of the present invention is to reduce the pressure loss in a relief valve employed for a high-pressure liquid supply pump. Disclosed is a high-pressure liquid supply pump for pressurizing a liquid and supplying the pressurized liquid from a low-pressure si... | 04/24/2012 |
| 7399167 | Fluid machine operable in both pump mode and motor mode and waste heat recovering system having the same A check valve is provided to each discharge port, which communicates between a corresponding working chamber and a high pressure chamber in an integrated compressor/expander apparatus. A valve mechanism, which is opened in a motor mode, is provided to communicate be... | 07/15/2008 |
| 7270145 | unloading/venting valve having integrated therewith a high-pressure protection valve The invention relates to valves for air compressors, and more particularly, to an unloading/venting valve having integrated therewith a high-pressure protection valve where a pressure reducing valve has a discharge port in communication with the air system and a ven... | 09/18/2007 |
| 6942472 | Head pressure relief assembly A head pressure relief assembly for relieving pressure in the head assembly of an air compressor may include an exhaust valve post formed in the head assembly and an exhaust valve assembly comprised of a flapper valve. An aperture may be formed through the exhaust v... | 09/13/2005 |
| 6863504 | Fluid pump relief valve A pump head for a fluid pump driven by a motor includes an inlet for receiving fluid at a first pressure and an outlet for outputting fluid at a second pressure greater than the first pressure. A relief valve cavity formed in the pump head housing includes a first p... | 03/08/2005 |
| 6672845 | Apparatus for preventing vacuum compression of scroll compressor An apparatus for preventing vacuum compression of a scroll compressor comprising: a suction tube and a discharge tube each combined to one side of a closed container filled with oil to an adequate height; a fixing scroll having a wrap and a coolant inlet ... | 01/06/2004 |
| 6494331 | Sampler To sample liquids containing volatile materials, the liquid is pumped through a syringe needle into a container until the container overflows. The needle is removed slowly and the container is automatically closed as the needle is withdrawn, wherein liqui... | 12/17/2002 |
| 6171071 | Water pump having water cooling device A water pump includes a housing having a water inlet, a water outlet, an exit and a mouth. A circulating water passage couples the exit to the mouth of the housing. A pump may pump water from the exit to the mouth of the housing via the circulating water ... | 01/09/2001 |
| 6059547 | Cylinder injection high-pressure fuel pump A cylinder injection high-pressure fuel pump permits reduction in size and cost thereof and it is also capable of securely absorbing high-frequency pulsations. The cylinder injection high-pressure fuel pump (200) has: a casing (1) in which an inlet passag... | 05/09/2000 |
| 6053712 | Cylinder injection high-pressure fuel pump A cylinder injection high-pressure fuel pump prevents the pulsations of fuel generated by a high-pressure fuel pump from spreading to a low-pressure pipe connected to a low pressure end. The cylinder injection high-pressure fuel pump has: a casing (1) in ... | 04/25/2000 |
| 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 |
| 5919033 | Pump having relief valve seat free of direct structural restraint A pump includes a coaxially integrated pump bypass/relief valve element of high density polymer material seats against a hard metallic sleeve that is pressed into a first counterbore around the bypass flow channel with an interference fit. That axial end ... | 07/06/1999 |
| 5846060 | Reciprocating piston pump with bleed passages A pump which has a piston (30) which is reciprocatingly moved vertically inside a tubular housing (32) to extract fluid from the bottom of a well (29). The piston (30) is attached to a motor (12) for driving it and has a horizontally extending base plate ... | 12/08/1998 |
| 5800136 | Pump with bypass valve A pump includes a housing having at least a first pumping chamber, an inlet, an inlet passage leading from the inlet to the pumping chamber, an outlet and an outlet passage leading from the pumping chamber to the outlet. A first pumping member is movable ... | 09/01/1998 |
| 5651665 | Adjustable relief valve arrangement for a motor vehicle power steering hydraulic pump system A hydraulic pump having a flow control valve for recirculating a fraction of the discharge of a rotating group of the pump and an externally adjustable pressure relief valve. The flow control valve includes a cylindrical bore in a housing of the pump, a d... | 07/29/1997 |
| 5570999 | Electromagnetic pump having an automatic exhaust-control valve Disclosed is an electromagnetic pump, in which oil is exhausted not intermittently but constantly with small pressure fluctuations, with reduced operational noise, with reduced fire-extinction delay, and improved energy efficiency. The electromagnetic pum... | 11/05/1996 |
| 5571000 | Booster pump with bypass valve integrally formed in gasket A pump comprising a housing including first and second housing sections and a gasket between the first and second housing sections. The housing has a first pumping chamber, an inlet, an inlet passage in the housing leading from the inlet to the pumping ch... | 11/05/1996 |
| 5462413 | Disposable relief valve seat for positive displacement pump A positive displacement pump includes a relief valve comprising an valve seat, a needle within the valve seat, a spring forcing the needle within the valve seat, a set screw pressing the spring against the needle and a spacer for mounting the set screw to... | 10/31/1995 |
| 5421702 | Lubricant pump for a turbine A lubricant pump (24) for supplying pressurized lubricant to the main bearings (14) of a drive shaft (12) for a steam turbine (10) as shown in FIG. 1. A lubricant pump (24) is positioned between a governor (18) and an adjacent bearing (14) with the gover... | 06/06/1995 |
| 5407329 | Pressure regulator for fuel injection devices The pressure regulator is suitable for disposition in a fuel pump. The pressure regulator has a metal bellows, which is connected on one end to a retaining ring and on the other end to a disk. An element is screwed into the retaining ring, which element c... | 04/18/1995 |
| 5378116 | Over-pressure relief means Inlet valves, in a fluid-pressuring cylinder, are biasingly held in given operative positions where they occlude passageways, formed in the cylinder, which open at opposite ends onto the cylinder interior and the cylinder exterior. When an incompressible ... | 01/03/1995 |
| 5059099 | Integral pump housing An integral cylinder liner and pump housing formed of a die cast aluminum workpiece of the type having a surface hardness extending a minimum depth into the workpiece, the housing further includng and integral pressure vessel and pressure control valve ho... | 10/22/1991 |
| 5044898 | Fuel injection pump A rotary distributor type fuel pumping apparatus for supplying fuel to an internal combustion engine has a distributor member an enlarged portion of which is formed with a transverse bore in which is mounted a pair of pumping plungers and blind bores loca... | 09/03/1991 |
| 5017099 | Fluid regulator valve An energy saving vacuum/pressure regulator is installed between a pump and a load for the pump, such as a storage tank, and relieves the load on the pump when the fluid in the load has reached a desired pressure state. The pressure state can be either neg... | 05/21/1991 |
| 4971527 | Regulator valve for an ink marking system A unitary pump, regulator valve/pulsation dampener, and interconnecting passageways is provided. The regulator valve/pulsation dampener includes a flexible member disposed in a chamber arranged between the fluid input and fluid output. The diaphragm flexe... | 11/20/1990 |
| 4905477 | Refrigerant circuit with passageway control mechanism A refrigerant circuit with a passageway control mechanism is disclosed which includes a compressor, a condenser and an evaporator connected to each other in series. The passageway control mechanism is disposed between an outlet side of the evaporator and ... | 03/06/1990 |
| 4860856 | Oil pressure adjustment device for engines In an engine lubrication an external bypass mechanism for venting pressurized liquid around the lubricated areas, whereby the high side pressure is maintained within a desired range. The bypass mechanism includes a pressure regulator that has variable pre... | 08/29/1989 |
| 4834623 | Electric fuel pump The pump comprises a casing in which is disposed a stator armature of an electric motor, a rotatable shaft to which is fixed a rotor winding and which is torsionally connected to an impeller rotor of the pump and a pair of covers which close the ends of t... | 05/30/1989 |
| 4763636 | Mechanical supercharger A mechanical supercharger utilized in internal combustion engines includes a housing having an inlet port, outlet port and a bypass passage disposed in the housing for connecting the inlet port and the outlet port with each other. A relief valve is dispos... | 08/16/1988 |
| 4722672 | Hydraulic energy-conversion device A device capable of functioning as a fluid pump or motor has a related hydraulic circuit controlling the relationship of the case pressure to the pressure in high-pressure port. The arrangement thus limits the operating pressure effective on the seal syst... | 02/02/1988 |
| 4472112 | Pressure control arrangements for an air compression system This disclosure relates to a pressure control arrangement for an air compressor. The pressure control arrangement includes an auxiliary pressure chamber which is vented to the atmosphere by the auxiliary pressure chamber is connected to the compression ch... | 09/18/1984 |
| 4408967 | Piston cylinder and head for compressors A piston cylinder and head arrangement for compressors including a valve plate disposed between a piston housing and the head. An intake valve, a discharge valve, and an atmospheric vent valve are all operably disposed in the valve plate, and are all arra... | 10/11/1983 |
| 4407640 | Reciprocating pump having unique pressure control valve construction A reciprocating pump, in which a pressure control valve has a pressure-receiving face and is supported to a valve seat bearing at least one of suction and discharge valves, the pressure-receiving face being disposed within a discharge passage, and at a cy... | 10/04/1983 |
| 4255094 | Automatic pressure holding electromagnetic pump An electromagnetic pump having a pressure adjusting function that holds discharge pressure constant; a decompression valve for throttling an outflow is provided in the path of the discharge side and this decompression valve is displaced by a pressure rece... | 03/10/1981 |
| 4251192 | Rotary pump with symmetrical by-pass and rotor with resiliently mounted vanes A rotary pump for pumping liquids is provided. The pump is compact with a bypass system built into the pump housing. The pump is symmetrical about a center line so it can pump liquids in opposite directions simply by reversing the rotation of the drive sh... | 02/17/1981 |
| 4246924 | Valve arrangement A valve arrangement is disclosed for controlling the supply of an operating fluid, having a casing with an inlet port, a main flow path provided with a non-return valve extending from the inlet port to an operating outlet port and a secondary flow path ex... | 01/27/1981 |
| 4201522 | Boost-retarding device for electromagnetic plunger pump and the like A pump has a boost-retarding device which comprises a cylinder communicating between the suction side and the discharge side of the pump. A plunger slidably and reciprocatingly fits into the cylinder and a lead passage communicates between the suction sid... | 05/06/1980 |
| 4171708 | Bypass and unloader valve A bypass and unloader valve capable of operation as a full unloader valve or volume control for fluid pressure systems. The structure utilizes a valve body having an inlet, an outlet, and a bypass, with check valve means being provided to accommodate norm... | 10/23/1979 |
| 4169695 | Electromagnetic pump with pressure-regulating mechanism An electromagnetic pump is disclosed in which a pair of check valves and a pressure-regulating mechanism are inserted in series in a fluid passage extending from a suction inlet to a discharge outlet and a pressure chamber operatively connected with a plu... | 10/02/1979 |
| 4140436 | Pressure control device for fluid systems A device is provided for monitoring and controlling the above-ambient pressure in a system by comparing a net pressure force, produced by the system pressure on a pair of diaphragms having unequal areas, with a net spring force produced by a pair of oppos... | 02/20/1979 |
