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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 |
| 7980837 | Self-aligning rotary pistone machine A rotary piston machine has a cylinder provided with two ends to form a stator with inlet and outlet apertures, and a piston having a rotor eccentrically mounted within the stator. A vane is connected to the rotor by a hinge and forms an expanding and contracting ch... | 07/19/2011 |
| 7845922 | Vane pump The invention relates to a vane pump comprising a rotor which is arranged therein, rotatably driven by a drive shaft. The rotor is provided with several grooves which are distributed through the circumference thereof and which extend substantially radially with resp... | 12/07/2010 |
| 7736139 | Motor driven by pressure medium supplied from an external pressure source A motor driven by pressure medium supplied from an external pressure source. The motor comprises a motor casing with a working chamber, a stator pail which forms an axial supply pipe for supply of pressure medium to the working chamber, a rotor part which is rotatab... | 06/15/2010 |
| 7628596 | Power steering pump A power steering pump for an automotive vehicle including a housing defining a compartment, a cam plate disposed within the housing, a rotor disposed within the housing and a lower pressure plate disposed within the housing between the cam plate and a closed end of ... | 12/08/2009 |
| 7597548 | Dual arc vane pump A rotary, positive displacement pump for fluids, having a pair of diametrically opposed vanes secured to a rotor in equally spaced, similarly contoured pockets, for movement between an extended position with a portion of the vane extending outwardly beyond the cylin... | 10/06/2009 |
| 7425121 | Rotary vane pump A pump assembly (100) having a pump housing (206 and 208) and a rotor (222) rotatingly disposed within the housing, the rotor having a plurality of slots (226). The pump assembly includes a plurality of vanes (224), each van... | 09/16/2008 |
| 7393192 | Rotary vane pump A rotary vane pump (200) for pumping a fluid. The rotary vane pump includes a pump housing (206 and 208) and a rotor having a plurality of dividing members (232) and a plurality of slots (226) disposed between adjacent dividing mem... | 07/01/2008 |
| 7390182 | Rotor structure of pneumatic tool A rotor structure of pneumatic grinder, including a rotor main body and at least one reinforcing plate. The rotor main body is formed with a central shaft hole for a rotary shaft to pass through. Several radial projecting sections are formed on outer circumference o... | 06/24/2008 |
| 7354260 | Pneumatic motor including a rotor in a cylinder between two covers in a shell from which air travels into the cylinder through the covers A pneumatic motor includes a shell, two covers, a cylinder and a rotor. The shell defines a space, at least one inlet in communication with the space and at least one outlet in communication with the space. Each of the covers defines at least one radial channel and ... | 04/08/2008 |
| 7351046 | Shaft-hub connection A shaft-hub connection for transferring a torque between a shaft (1) and a hub (3) with the aid of at least one drive element (2). To enable a torque transfer which is practically resistant to wear, even under the effect of transversal forces, t... | 04/01/2008 |
| 7347675 | Vane rotary expansion engine A high-efficiency vane rotary expander is provided, which prevents a loss due to incomplete expansion or overexpansion from occurring because the volume of an operating chamber may vary. This is done by forming a plurality of discharge ports (28, 29, 48, 49, 50 | 03/25/2008 |
| 7343894 | Modular rotary engine An internal combustion device, rotor self cooled, concentric and symmetric shape, dynamically variable compression ratio; capable of developing multiple Otto cycles per rotation, using modules, each made, mainly of a solenoid gate valve and three chambers operating ... | 03/18/2008 |
| 7338267 | Hinged paddle pump A rotary pump for fluids comprising a shaft to rotate about a longitudinal axis and a cylindrical rotor centrally secured to that shaft. A housing encasing the shaft and rotor includes, interior end walls adjacent to the rotor disks and an interior side wall. Fluid ... | 03/04/2008 |
| 7316551 | Vane pump with integrated shaft, rotor and disc A rotary vane suction pump that includes a housing that defines a pump chamber. A shaft is rotatably mounted to the housing. A rotor is fixed to the front end of the shaft to rotate in unison with the vanes. The vanes that form the fluid cavities, into which the flu... | 01/08/2008 |
| 7314359 | Vane pump for continuously variable transmission In a vane pump disposed inside a transmission case of a continuously variable transmission, a pump case (20), a pump drive shaft (8) rotatably supported by a shaft bore (9) of the pump case (20) to rotate a rotor (5), and a drain p... | 01/01/2008 |
| 7273360 | Vane-type hydraulic motor A vane-type hydraulic motor includes a rotor (30) having a main shaft (70) and a plurality of vanes (35), a cam casing (10) having a chamber (11) for rotatably housing the rotor (30), a first port (13) and a second po... | 09/25/2007 |
| 7255546 | Spindle for a vane motor The spindle of a vane motor is designed to enhance the power, speed and torque by undercutting the spindle adjacent to the vanes on the power stroke side to increase the working area of the vanes and by adding slots intermediate the vane formed in said spindle and e... | 08/14/2007 |
| 7226281 | Vane pump having vanes slanted relative to rotational axis A vane pump is composed of a casing having a cylindrical inner bore and a rotor disposed in the inner bore with an eccentric relation to the inner bore. A circular pump chamber formed between the rotor and the inner bore is divided by vanes disposed in the rotor int... | 06/05/2007 |
| 7207785 | Vane pump wear sensor for predicted failure mode A vane pump is disclosed for use with gas turbine engines that is adapted and configured to provide a failure mode similar to that of a traditional gear pump. The vane pump includes a pump housing, a cam member, a cylindrical rotor member and a mechanism for communi... | 04/24/2007 |
| 7175403 | Integrated select high pressure valve A rotary actuator includes one or more rotor vanes (40); an endplate (60); a corner seal (30) being positioned between the rotor vanes (40) and the endplate (60); a vane seal (20); a high pressure chamber and a low pressure ... | 02/13/2007 |
| 7150610 | Gas compressor To reduce an excessively high vane back pressure to an appropriate pressure to thereby relieve operational load, and to improve the vane projectability at the start and during low speed operation to thereby prevent chattering; There are provided back pressure spaces... | 12/19/2006 |
| 7134855 | Vane pump with integrated shaft, rotor and disc A rotary vane suction pump that includes a housing that defines a pump chamber. A shaft is rotatably mounted to the housing. A rotor is fixed to the front end of the shaft to rotate in unison with the vanes. The vanes that form the fluid cavities, into which the flu... | 11/14/2006 |
| 7128544 | Crescent seal for the cylinder of a vane motor A vane motor is modified to increase the sealing effectiveness of the gap made at the interface of the spindle and cylinder by undercutting the cylinder a predetermined amount and distance so as to increase the effectiveness of the spindle to cylinder gap and to dec... | 10/31/2006 |
| 7118361 | Rotary pistons A rotary piston for use in pumps or motors, the piston having a radially movable vanes seated within the pumps rotor. The vanes are biased outwardly and forced inwardly by a cam action of the interior wall of the housing of the piston. Operation of the piston may be... | 10/10/2006 |
| 7114932 | Valve-free oxygen concentrator featuring reversible compressors A pivoting vane rotary compressor includes a housing having a generally pear-shaped chamber. A rotor mounted within the chamber defines a main and constricted chamber regions. Reversible intake and exhaust ports alternately introduce air into and exhaust air from th... | 10/03/2006 |
| 7097437 | Rotary fluid machine A rotary fluid machine is provided that includes a rotor chamber (14), a rotor (41), vanes (48) guided by vane channels formed in the rotor (41), and pistons (47) slidably fitted in cylinders (44) provided in the rotor (4... | 08/29/2006 |
| 7094044 | Vane pump having a pressure compensating valve An apparatus (10) comprises a pump (12) and a pressure compensating valve (94). The pump (12) includes a member (22) having a surface (24) defining a pumping chamber. A rotatable rotor (30) is located in the pumping c... | 08/22/2006 |
| 7090476 | Rotary fluid machine A rotary fluid machine is provided in which a rotating shaft (113) fixed to a rotor (41) is rotatably supported on a fixed shaft (102) fixed to a casing (11), sliding surfaces of the fixed shaft (102) and the rotating shaft (113... | 08/15/2006 |
| 7083394 | Vane pump with undervane feed A vane pump is disclosed for use with gas turbine engines which has pressurized fluid supplied to the undervane portion of the vane elements to balance the forces imparted thereon. The vane pump includes a pump housing, a cam member, a cylindrical rotor member and a... | 08/01/2006 |
| 7073477 | Gorski rotary engine A rotary engine is provided with solid vanes which extend through the rotor and engage opposing interior wall portions of the stator housing. A series of grooves in the interior wall permit the expanding exhaust gases to by-pass the minimal surface area of vanes pro... | 07/11/2006 |
| 7070396 | Oil pump apparatus having oil drain In an oil pump apparatus, a drain outlet is positioned outwardly from an inner peripheral surface of a suction passage or from an extended line thereof at a sectional view which takes along an orthogonal direction relative to a central axis of the suction passage an... | 07/04/2006 |
| 7070399 | Variable displacement pump with a suction area groove for pushing out rotor vanes A variable displacement pump has a cam ring, a rotor, a plurality of vanes, a pressure plate and a rear body. The cam ring is accommodated within a pump body. The rotor rotates within the cam ring. The plurality of vanes are inserted retractably into slits formed at... | 07/04/2006 |
| 7056107 | Vane type rotary machine The present invention relates to a vane-type rotary machine suitable for use in applications where a low-viscosity fluid such as water is used as a working fluid. According to the present invention, a vane-type rotary machine having a rotor (11) mounted with ... | 06/06/2006 |
| 7040872 | Rotary fluid machinery Pistons (41) are slidably received in a plurality of cylinders (39) disposed radially in a rotor (31), and a plurality of vanes (42) cooperating with the pistons (41) are disposed radially in the rotor (31), so that a vane c... | 05/09/2006 |
| 6976832 | Fluid rotary machine A fluid rotary machine (10) includes an inner housing (12) provided with a manifold (68) for directing working fluid through the machine (10) and an outer housing (14) coupled to the inner housing (12) so that the outer hous... | 12/20/2005 |
| 6945218 | Rotary pistons A rotary piston for use in pumps or motors, the piston having a cylindrical rotor with radially movable vanes rotating within a housing, the movement of the vanes controlled by pins of the vanes travelling in races in the housing. ... | 09/20/2005 |
| 6939117 | Rotary apparatus A rotary machine (10) comprises an inner housing (12) having valving means (14) which includes a shaft (15) for directing working fluid through the machine (10) and, an outer housing (16) within which the inner housing resid... | 09/06/2005 |
| 6935854 | Gas compressor A gas compressor has a cylinder in which a refrigerant gas is compressed and a side block mounted to an end surface of the cylinder. The side block has suction holes each having a first end opening to an outer surface of the side block and a second end opening into ... | 08/30/2005 |
| 6929457 | Gas compressor A rotary vane gas compressor has a cylinder, a rotor in the cylinder, and vanes slidably disposed in radial vane grooves in the rotor to define compression chambers for intaking, compressing and discharging compressed gas during rotation of the rotor. A flat groove ... | 08/16/2005 |
| 6910873 | Self regulating rotor A machine that is a self regulating rotor with a set of cups or vanes that are pivotally attached about a central axis such that they form a closed three dimensional shape when closed, and when rotated into an open orientation form an S-shaped rotor, when viewed as ... | 06/28/2005 |
