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...that Kleenex tissue was originally designed to be a gas mask filter? It was developed at the beginning of World War I to replace cotton, which was then in short supply as a surgical dressing.
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| Number | Title | Issue Date |
| 8118579 | 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... | 02/21/2012 |
| 7427191 | Oil pump In an oil pump employing a cam ring, and inner and outer rotors in meshed-engagement, two housings are provided at opposite ends of the cam ring. A plurality of volume chambers are defined between inner and outer teeth of the rotors. Two axial holes are formed in th... | 09/23/2008 |
| 7367782 | Pump plate of a rotary feed pump In a pump plate (26) of a feed pump, an inlet port (26b) and an outlet port (26c) are formed around a shaft hole (26a) through which a driving shaft is inserted, and a rib (26f), which partitions each of... | 05/06/2008 |
| 7347678 | Friction reducing seal ring for gear pump A seal ring for improving the performance of a gear pump, primarily for vehicle transmissions, comprises the milling of a circular ring on at least one lateral face of an inner gear and an outer gear in a gear pump and inserting a friction reducing ring within the m... | 03/25/2008 |
| 7290995 | Tandem type trochoid pump and method of assembling the same A tandem type trochoid pump is comprised of a drive shaft having a non-circular end portion, a spacer positioned between a first trochoid pump and a second trochoid pump in a housing body, a first fixing portion for fixing a first inner rotor of the first trochoid p... | 11/06/2007 |
| 7278841 | Gerotor pump Improved gerotor pumps comprising laterally constrained floating rings, thereby providing an orthogonal degree-of-freedom and allowing gerotor sets positioned therein to establish their own preferred mesh orientation, and additionally wherein the outer rotor of the ... | 10/09/2007 |
| 7186101 | Gerotor apparatus for a quasi-isothermal Brayton cycle Engine According to one embodiment of the invention, a gerotor apparatus includes an outer gerotor having an outer gerotor chamber, an inner gerotor, at least a portion of which is disposed within the outer gerotor chamber, and a synchronizing apparatus operable to control... | 03/06/2007 |
| 7153110 | Variable volume flow internal gear pump Rotational pump with variable volume flow, comprising a pump housing having a suction connection and a pressure connection, an outer rotor with inner toothing which is rotatably disposed inside the housing, and an inner rotor with outer toothing which is eccentrical... | 12/26/2006 |
| 7147445 | Turntable with turning guide A gerotor mechanism is used to guide the rotation of a turntable having a Reuleaux triangle shape. In one version, the mechanism includes a gerotor having three lobes, and the gerotor guide has a guide profile including four recesses for receiving the lobes of the g... | 12/12/2006 |
| 7137797 | Turntable with gerotor A gerotor mechanism is used to guide the rotation of a turntable having a Reuleaux triangle shape. The mechanism includes a gerotor having three lobes; the gerotor guide has a guide profile including four recesses for receiving the lobes of the gerotor. Rotation is ... | 11/21/2006 |
| 7074018 | Direct drive linear flow blood pump A ventricular assistive device (VAD) based on a progressive cavity pump includes a pump housing having an inlet and an outlet, a pump stator contained within the pump housing, a pump rotor rotatably disposed within the pump stator, a motor including a motor rotor co... | 07/11/2006 |
| 6929458 | Oil pump rotor An internal gear oil pump rotor assembly which enables the construction of an oil pump that is compact and has high performance. In the oil pump rotor assembly having an inner rotor and an outer rotor, the number of teeth “Zi” of the inner rotor with trochoid to... | 08/16/2005 |
| 6893238 | Ring gear machine clearance A displacement-type ring gear machine includes a casing including a gear chamber comprising a supply port and a discharge port, an internal gear accommodated in the gear chamber and comprising an external toothing, and an external gear eccentric to the internal gear... | 05/17/2005 |
| 6890164 | Internal gear pump A noise-reduced internal gear pump incorporating an inner rotor having an addendum formed by a smooth curve and a dedendum formed by a hypocycloid. The tooth profile of the outer rotor is determined by the following steps. The center Oi of an inner rotor 1 is... | 05/10/2005 |
| 6889871 | Internally generated rotor set for low viscosity and abrasive metering applications An internal gear set comprising an inner rotor having a number of radially projecting cylindrical tooth members engaging a conjugate internally toothed outer rotor. The latter has one more tooth than there are tooth members on the inner rotor and is mounted eccentri... | 05/10/2005 |
| 6824486 | Gear pump for automatic transmission An oil film is formed between side faces of a pump gear and side faces of a pump casing to thereby reduce wear and reduce sliding resistance. To form the oil film predetermined numbers of recesses are provided in both side faces of a drive gear and in both side face... | 11/30/2004 |
| 6782866 | Rotary machine and thermal cycle A rotary machine having a housing with rotary components disclosed within. The rotary machine is configurable as an internal combustion rotary engine, an external combustion rotary engine, a gas compressor, a vacuum pump, a liquid pump, a drive turbine, or a drive t... | 08/31/2004 |
| 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 |
| 6672275 | Rotary machine and thermal cycle A rotary machine having a housing with rotary components disclosed within. The rotary machine is configurable as an internal combustion rotary engine, an external combustion rotary engine, a gas compressor, a vacuum pump, a liquid pump, a drive turbine, o... | 01/06/2004 |
| 6551083 | Micromotor and micropump The invention concerns a micropump for the substantially continuous delivery of a mass flow, the micropump having a sleeve axis and an offset axis of rotation. An internal rotor meshes with an external rotor in a sleeve and at least one outlet-side pressu... | 04/22/2003 |
| 6544013 | Oil pump apparatus An oil pump apparatus includes an oil pump housing having a first suction port, a second suction port and a discharge port in the circumferential direction thereof. A shape of the end portion in the anti-rotational direction at the second suction port is ... | 04/08/2003 |
| 6530211 | Quasi-isothermal Brayton Cycle engine An engine is disclosed. According to one embodiment of the present invention, the engine comprises a compressor, and combustor, and an expander. The compressor compresses ambient air. The combustor burns the compressed air, and produces exhaust gasses. Th... | 03/11/2003 |
| 6484687 | Rotary machine and thermal cycle A rotary machine having a housing with rotary components disclosed within. The rotary machine is configurable as an internal combustion rotary engine, an external combustion rotary engine, a gas compressor, a vacuum pump, a liquid pump, a drive turbine, o... | 11/26/2002 |
| 6481991 | Trochoid gear type fuel pump Two inner gears are overlapped with each other through a partition wall and are eccentrically arranged at an inner peripheral side of an outer gear, and eccentric directions of both the inner gears are shifted from each other by 180° to the opposite side... | 11/19/2002 |
| 6398531 | Pump drive system A drive system is provided for coupling a clutch assembly with a pump assembly that provides fluid power to cool, lubricate and control the operation of the clutch. The drive system comprises a drive coupling rotatably supported on an input shaft by a plu... | 06/04/2002 |
| 6368086 | Universal pump bracket This invention is directed to a pump bracket that is adapted to allow for the inboard or outboard mounting of a mechanical seal or packing material to accommodate different pump configurations and applications. The universal pump bracket includes a first ... | 04/09/2002 |
| 6336317 | Quasi-isothermal Brayton cycle engine An engine is disclosed. According to one embodiment of the present invention, the engine comprises a compressor, and combustor, and an expander. The compressor compresses ambient air. The combustor burns the compressed air, and produces exhaust gasses. Th... | 01/08/2002 |
| 6250900 | Positive displacement hydraulic unit with near-zero side clearance A positive displacement hydraulic unit includes a housing having a chamber formed therein with a circumferential surface bounded by a pair of spaced apart end walls. A rotary element for displacing fluid rotatably mounts in the chamber. A layer of abradab... | 06/26/2001 |
| 6186757 | Internal-gear machine An internal-gear machine has a casing and a running assembly accommodated in the casing and comprising a rotatably mounted pinion and an internally toothed annular gear meshing with the pinion. The annular gear is widened at its outer periphery to form a ... | 02/13/2001 |
| 6179596 | Micromotor and micropump The invention concerns a micropump for the substantially continuous delivery of a mass flow, the micropump having a sleeve axis and an offset axis of rotation. An internal rotor meshes with an external rotor in a sleeve and at least one outlet-side pressu... | 01/30/2001 |
| 6174151 | Fluid energy transfer device A trochoidal gear pump or engine uses a coaxial hub with the outer and/or inner rotor and an associated rolling element bearing assembly that preferably uses pre-loaded bearings to precisely set the rotational axis and/or the axial position of the rotor w... | 01/16/2001 |
| 6167907 | Power transfer pump A power transfer pump includes a rotary pump disposed within connected body sections comprising a top body, a main body with two ports and a cylindrical chamber to house a rotary assembly, a supporting body fitted with a connecting head, and a mounting bo... | 01/02/2001 |
| 6152717 | Internal gear pumps An internal gear pump includes in a pump housing an outer rotor including an internal gear portion on the inner periphery, and an inner rotor being eccentrically disposed with respect to the outer rotor and including an external gear portion on the outer ... | 11/28/2000 |
| 6149410 | Reversible gerotor pump having magnetic attraction between the rotor and the reversing ring A reversible gerotor-type pump having an angularly moveable reversing ring rotatably supporting an internally toothed rotor which in turn cooperates with an externally toothed gear received within the rotor and rotatable therewith about an axis parallel t... | 11/21/2000 |
| 6116878 | Oil pump apparatus An oil pump apparatus incorporates a housing defining therein a generally cylindrical space, an outer rotor having a substantially cylindrical outer peripheral surface disposed in rotatably sliding contact with an inner peripheral surface of the cylindric... | 09/12/2000 |
| 6106256 | Gear rotor fuel pump An electric motor fuel pump has an inner gear rotor and an outer gear rotor each with a plurality of radially opposed intermeshing teeth each having a pair of driving surfaces and defining circumferentially disposed expanding and ensmalling pumping chambe... | 08/22/2000 |
| 6102684 | Cavitation noise abatement in a positive displacement fuel pump A positive displacement gear rotor fuel pump with a plurality of spaced apart outlet ports through which fuel is discharged from a fuel pumping assembly and a valve which prevents any fuel downstream of the outlet ports which is at outlet pressure, from r... | 08/15/2000 |
| 6082984 | Fluid pump having pressure pulsation reducing passage A fuel pump comprises a pump unit and a motor unit. The pump unit is a trochoid gear type having rotors in a pump chamber defined by a pair of side plates and a cylindrical housing. A disk plate is attached to the side plate to provide an arcuate-shaped p... | 07/04/2000 |
| 6077059 | Oil pump rotor An oil pump rotor in which there is formed an inner rotor 10 having n teeth, the tips of the teeth prescribed by an epicycloid curve generated by a first outer rotating circle Ei which rotates along the base circle Bi of inner rotor 10, and the tooth spac... | 06/20/2000 |
| 6074189 | Filling member-less internal-gear machine A filling member-less internal-gear unit has a casing with a bearing ring which is accommodated movably in a bore in the casing transversely with respect to its axis but non-rotatably. An internally toothed annular gear is rotatably mounted in the bearing... | 06/13/2000 |
