Bizarre Patents
Mountable Printable Placard With Headband
A resilient headband in a shape for being mounted on the head of the user. The headband is equipped with a longitudinal slotted member for holding a placard.
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| Number | Title | Issue Date |
| 7361001 | Hydraulic vane pump A hydraulic vane pump includes a plurality of members forming a recession and an orifice in fluid communication with one another and with rotating vane cells at an inlet sector of the pump. Air entrained in the vane cells is exhausted through the recession and the o... | 04/22/2008 |
| 7261526 | Cylinder for a vane motor A cylinder to a vane motor is designed to include cylindrically shaped inlet and outlet holes, an axial passage that includes a blocked upstream portion that bypasses the upstream inlet holes, spaced circumferentially slots for leading a portion of the pressurized a... | 08/28/2007 |
| 7232297 | Screw pump A pump including at least three rotors each being provided with a generally helical screw thread, the rotors being mounted for rotation in a housing such that the screw threads of the rotors mesh and rotation of one rotor causes rotation of the other rotor, wherein ... | 06/19/2007 |
| 7226280 | Roots vacuum pump In a Roots vacuum pump, an inlet port is located at a position n spaced by a positive displacement angle of 120° in one direction from a center of each rotational axis relative to an imaginary line m connecting rotor axes. An outlet port is located at a position o ... | 06/05/2007 |
| 7207787 | Scroll compressor with backflow-proof mechanism A scroll compressor with a backflow-proof mechanism. The scroll compressor comprises a slider disposed on a scroll couple, forming several enclosed spaces. The slider is raised by the working fluid in the spaces, preventing liquid leakage from a high-pressure chambe... | 04/24/2007 |
| 7165955 | Trochoid type oil pump It is an object of the present invention to provide a trochoid type oil pump in which erosion of the rotor surfaces caused by cavitation is minimized, vibration and noise are reduced, and the structure is greatly simplified. The trochoid type oil pump of the present... | 01/23/2007 |
| 7165933 | Screw pump for transporting emulsions susceptible to mechanical handling A screw pump for transporting a viscous product is described comprising a cylindrical housing connected to a removable bottom piece in one end and a removable cap in the opposite end, a rotor having one or more screw blades connected to a driving motor, an inlet and... | 01/23/2007 |
| 7144234 | Flanged gear pump The invention concerns a gear pump comprising a pump body (2) closed with a cover (3) forming a cavity wherein is provided a drive pinion (4) capable of being driven in rotation by a drive shaft (1) whereto it is fixed, a driven pinion ( | 12/05/2006 |
| 7108492 | Roots pump A roots pump has a housing, a plurality of rotary shafts, a rotor, a confluent passage and a closed space. The housing forms therein a pump chamber. The rotary shafts are supported on the housing in parallel relation to each other. The rotor is mounted on each of th... | 09/19/2006 |
| 7014436 | Gear pump A pump comprises a driving rotor and a driven rotor that are positioned in a housing such that, as the driving rotor and the driven rotor rotate, the teeth of the driving rotor and the teeth of the driven rotor mesh to form a positive displacement seal. The teeth of... | 03/21/2006 |
| 6964560 | Vacuum pump An object of this invention is to prevent drop of life of a bearing by an axial force when using a pump as a compressor. In a vacuum pump 1 compressing and discharging gas in a direction of a rotor axis by rotation of screw rotors 3, 4 engaged together... | 11/15/2005 |
| 6935851 | External gear pump with pressure fluid pre-loading External gear pump, comprising: a casing (3a, 3b) with a gear chamber (4), comprising an inlet (5) for a fluid on a low pressure side and an outlet (6) on a high pressure side and comprising axial and radial sealing s... | 08/30/2005 |
| 6932588 | Variable capacity rotary compressor A variable capacity rotary compressor includes a housing defining a cylindrical compression chamber therein and having an inlet port and an outlet port communicating with the compression chamber. A rotating shaft is provided with an eccentric part to rotate in the c... | 08/23/2005 |
| 6918804 | Personal watercraft A personal watercraft comprising a water jet pump, an engine for driving the water jet pump, and a mechanically driven supercharger provided independently of the engine and configured to draw taken-in air to the engine. ... | 07/19/2005 |
| 6817847 | Rotary pump having a hydraulic intermediate capacity with first and second connections The invention relates to a pump with a pump chamber with a rotary-driven pump element mounted, at least one suction and at least one pressure connection opening into the pump chamber and with circulating pumping cells whose volume can be changed, which are connected... | 11/16/2004 |
| 6749404 | Scroll compressors Scroll compressors (100, 110) may include a movable scroll (20) that is disposed opposite to a fixed scroll (2). At least one compression chamber (32) is defined between the fixed scroll and the movable scroll. A motor (49) drives ... | 06/15/2004 |
| 6739850 | Motor-type fuel pump for vehicle At a boundary area between a high-pressure portion in which a discharge port of a fuel pump is disposed and a low-pressure portion in which an intake port is disposed, a pressure relief groove extending along the boundary area is formed so as to be communicated with... | 05/25/2004 |
| 6739853 | Compact control mechanism for axial motion control valves in helical screw compressors An axial slide valve is provided with an axially extending fluid chamber at each end with one chamber receiving a spring and being acted on by suction pressure and the other chamber coacting with a fixed piston and being acted upon by discharge pressure or the like ... | 05/25/2004 |
| 6623262 | Method of reducing system pressure pulsation for positive displacement pumps An improved method and apparatus for reducing pressure pulsation when pumping fluids having highly entrained gas therein. The pump has a drive screw and a pair of idler screws. The screws are placed in a screw channel between a suction end and a discharge... | 09/23/2003 |
| 6589034 | Backflow orifice for controlling noise generated by a rotary compressor The invention relates to the design of backflow orifices for a rotary compressor serving as a compressor for an engine. One example of such a rotary compressor is a roots blower. The fluid conveyed by two oppositely rotating rotors from an inlet to an out... | 07/08/2003 |
| 6527530 | Gear-wheel pump, in particular for a high-pressure fuel pump A geared pump, having a housing (18), two gear wheels (14, 16) that are disposed in the housing and mesh with one another, and at least one groove (22) that is embodied in the housing on the pressure side of the geared pump, cavitation damage at high rpm ... | 03/04/2003 |
| 6425748 | Positive displacement rotary pump A positive displacement rotary pump including a housing having an internal chamber and inlet and discharge ports, a sealing land on the housing between a downstream end of the inlet port and an upstream end of the discharge port, and a rotating group in t... | 07/30/2002 |
| 6336800 | Rotary compressor A rotary compressor of the low operational noise type is disclosed. This compressor consists of a casing, a rotating shaft set within the casing, a roller eccentrically fixed to the rotating shaft and eccentrically, rotatably set within a cylinder so as t... | 01/08/2002 |
| 6312240 | Reflux gas compressor A positive displacement, recirculating Root's type rotary compressor which operates on a constant volume, near isothermal cycle is disclosed. The compressor includes a pair of involutely lobed impellers and a discharge pressure reflux flow loop. The flow ... | 11/06/2001 |
| 6254367 | High viscosity product pumping method and apparatus The required larger than normal pressure drop between the infeed and pump inlets of a positive displacement gear or lobe type pump pumping a high viscosity fluid such as pastry dough is obtained by the introduction of a vacuum inside the pump at or near t... | 07/03/2001 |
| 6176693 | Volumetric blower with covers having a duct for connection to the delivery manifold Volumetric blower comprising an internally hollow body (11) for defining a compartment (12) which is placed in communication with an intake manifold (30) and a delivery manifold (31) and which has, arranged inside it, two rotors (20) which are parallel to... | 01/23/2001 |
| 6142759 | Two-shift fluid machine In a Roots displacement fluid machine (5) comprising rotors (15, 17) meshed with each other in a tooth trace (57, 59) formed in parallel to a rotating central axis, and a casing (13) having a rotor chamber (33) rotatably receiving the rotors (15, 17), a f... | 11/07/2000 |
| 6099277 | Gas blower and method utilizing recirculation openings A gas blower and method according to which the gas is introduced into the inlet of a housing where it is pressurized by rotating impellers. The pressurized gas is directed to a discharge plenum from which a first portion of the gas is discharged. The rema... | 08/08/2000 |
| 6068461 | Vane type rotary pump having a discharge port with a tapered bearded groove A vane type rotary pump including a stator housing, a cam ring formed at its inner periphery with a cam surface and mounted within the stator housing, a pair of end wall structures fitted to the opposite ends of the cam ring to form a pump cavity in the c... | 05/30/2000 |
| 6042352 | Bearing with pulsed bleed configuration A bearing for a gear pump including a bearing dam which has a surface, an inlet face relief located on the bearing dam, and a discharge face relief located on the bearing dam. A bearing dam wall is located between the inlet face relief and the discharge f... | 03/28/2000 |
| 6033197 | Gear pump having a bleed slot configuration A method and apparatus is provided for producing a gear pump/motor in a low cost and efficient manner that can effectively operate in air entrained oil without emitting undesirable noises. This is accomplished by providing bleed slots in a housing adjacen... | 03/07/2000 |
| 6030191 | Low noise rotary vane suction pump having a bleed port A suction pump (22) suitable for use in a fuel dispensing system (20) or other fluid delivery system for volatile liquids. The suction pump includes a pump casing that defines a pump chamber (52) with inlet and outlet ports. A rotor (54) with vanes (58) i... | 02/29/2000 |
| 5720603 | Vane pump The present invention refers to a vane pump used for dividing a pasty and compressible substance into portions and comprising a pump housing and a rotor which is arranged eccentrically in said pump housing and which is adapted to be rotated, and further c... | 02/24/1998 |
| 5716201 | Variable displacement vane pump with vane tip relief A variable displacement vane pump having a vaned rotor adjustably contained within a cam member for rotation between fuel inlet and fuel discharge arcs. Adjacent vanes form enclosed fuel bucket areas which are expanded and axially-supplied with fuel in th... | 02/10/1998 |
| 5702240 | Rotary positive displacement blower having a diverging outlet part A rotary positive displacement blower for producing a flow of fluid. The blower includes a housing having a rotor chamber, an inlet port and an outlet port. The outlet port has a first end and a second end and a first edge and a second edge which extend f... | 12/30/1997 |
| 5607288 | Scroll machine with reverse rotation protection A scroll machine has an intermediate pressure cavity which is operable to open and close a leakage path between the discharge zone and the suction zone of the scroll machine. The leakage path is closed when intermediate pressurized fluid is supplied to th... | 03/04/1997 |
| 5591014 | Scroll machine with reverse rotation protection A scroll machine has an intermediate pressure cavity which is operable to open and close a leakage path between the discharge zone and the suction zone of the scroll machine. The leakage path is closed when intermediate pressurized fluid is supplied to th... | 01/07/1997 |
| 5571003 | Fuel pump with and method to modulate vapor purge port pressure pulses A rotary pump for volatile hydrocarbon fuels for use in a fuel system of an internal combustion engine of an automotive vehicle. A pulsation chamber allows purging of fuel vapor from the pump and dampens expansion and contraction of the fuel and vapor due... | 11/05/1996 |
| 5449280 | Pump including integral reservoirs for permitting dry run of pump A pump having a housing with an integral fluid reservoir and flexible end plates to permit the pump to be run dry for an extended period of time. A pair of reservoirs are provided, one each side of a pumping chamber. These reservoirs are in fluid communic... | 09/12/1995 |
| 5439358 | Recirculating rotary gas compressor A positive displacement, recirculating Roots-type rotary gas compressor which operates on the basis of flow work compression is disclosed. The compressor includes a pair of large diameter recirculation conduits (30 and 32) which return compressed discharg... | 08/08/1995 |
