Did You Know...
...that while attempting to develop a super strong glue, 3M employee Spencer Silver accidentally developed a glue that was so weak it would barely hold two pieces of paper together? However, his colleague Art Fry needed the glue. Fry sang with his church choir and marked the pages of his hymnal with small scraps of paper that often fell out. He used Silver's glue to hold the papers in place. Today we call this invention Post-it Notes.
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| Number | Title | Issue Date |
| 8182250 | Gerotor motor and brake assembly A hydraulic device includes a gerotor assembly, a wobble stick, an output shaft, a housing assembly, first and second ports, first and second brake disks, a piston, and a biasing member. The gerotor assembly includes a rotor and a stator. The housing assembly receiv... | 05/22/2012 |
| 8157552 | Rotary fluid pressure device and improved parking lock assembly therefor A rotary fluid pressure device (11) includes an end cap (23) which is disposed rearwardly of, and adjacent, the fluid displacement mechanism (21). The end cap defines a piston cavity (103) in which is disposed a lock piston (105), ... | 04/17/2012 |
| 7963754 | Hydraulic machine The invention concerns a hydraulic machine with a set of teeth, having a toothed ring with an inner toothing and a gear wheel with an outer toothing, the gear wheel rotating and orbiting in the toothed ring, the inner toothing and the outer toothing touching each ot... | 06/21/2011 |
| 7959422 | Oil pump and method of assembling the oil pump An oil pump including a first housing having a rotation shaft insertion hole, a cam ring, a pump element, a rotation shaft rotatably extending through the rotation shaft insertion hole, a second housing disposed on the cam ring, wherein the cam ring is placed in a p... | 06/14/2011 |
| 7845919 | Brake releasing mechanism and brake system An embodiment of a gerotor apparatus includes a housing including a first member. The first member includes a brake pin aperture formed therein. The apparatus also includes a brake pin at least partially interposed within the first member. The brake pin includes a f... | 12/07/2010 |
| 7845920 | Oil pump An oil pump in which pulsation vibration due to the dynamic pressure on the discharge port side can be attenuated. In an oil pump for transporting fluid from a suction port to a discharge port by the rotation of a rotor mounted in a pump casing, a resonator configur... | 12/07/2010 |
| 7837453 | Device for driving an oil pump in a transmission A device (1) for driving an oil pump (2) for a transmission of a motor vehicle, having a pump housing (4), a transmission housing (3), a pump shaft (8), and a gear shaft (13), which is in rotationally fixed connection with t... | 11/23/2010 |
| 7832996 | Hydrostatic rotary cylinder engine The invention relates to a hydrostatic, slow-speed rotary cylinder engine comprising a power part (1) which acts as an output, said power part comprising a central, stationary stator (4), a rotary cylinder (6) which is used as a rotor and a shaf... | 11/16/2010 |
| 7832997 | Variable capacity gerotor pump A variable capacity gerotor pump includes an inner rotor that is axially displaceable with respect to the outer rotor to vary the volumetric capacity of the pump. An active piston abuts the lower surface of the inner rotor and can ride inside the outer rotor, as the... | 11/16/2010 |
| 7726958 | Hydraulic machine A hydraulic machine has a gear wheel (2) with outwardly extending teeth and a gear ring (4) with inwardly extending teeth formed by rollers each of which is supported in a pocket (8) in the gear ring, and pressurized spaces are formed between th... | 06/01/2010 |
| 7722342 | Pump apparatus and power steering In order to realize cost reduction in a gear pump apparatus by reducing form accuracy of a gear while securing pump performance, a running-in coating is provided on a tooth sliding contact portion when forming a confinement area in at least one of gears of the gear ... | 05/25/2010 |
| 7704061 | Oil pump An oil pump includes pump chambers each having a volume varied by engine drive and for pressurizing oil inhaled through an inlet port and discharge it through an outlet port, and a branch passage connected between upstream and downstream sides of the outlet port at ... | 04/27/2010 |
| 7695259 | Rotary fluid pressure device with modular multi-speed control mechanism A rotary fluid pressure device (11) includes a plate assembly (17) having a plate member (71) and at least one cover plate (105), which defines a mounting surface (107) adapted for sealing engagement with an exterior surface (77... | 04/13/2010 |
| 7695258 | Gerotor motor and brake assembly A hydraulic device includes a gerotor assembly, a wobble stick, an output shaft, a housing assembly, a first port in the housing assembly, a second port in the housing assembly, first brake disks, second brake disks, a piston, and a biasing member. The gerotor assem... | 04/13/2010 |
| 7637725 | Variable output gerotor pump A variable output gerotor pump includes outer and inner driven and driving rotors and an annular output control ring which is rotatable within a bore mounted within the pump's body so as to change the amount of working fluid which is transferred from the inlet port ... | 12/29/2009 |
| 7559754 | Internal gear pump in combustion engine An internal gear pump (39) of the present invention includes an inner rotor (49) relatively non-rotatably mounted on one end of a pump shaft (22) driven by a crankshaft (9), and an outer rotor (50) rotatably supported by a crankcas... | 07/14/2009 |
| 7530801 | Bi-directional disc-valve motor and improved valve-seating mechanism therefor A rotary fluid pressure device (11) has a stationary valve member (17), a rotatable valve member (51), and a valve seating mechanism (73). The valve seating mechanism (73) defines an outer balance ring member (75) having a v... | 05/12/2009 |
| 7500837 | Small size gear pump A small size gear pump having a disc-shaped case, inside which a flat cylindrical motor rotor chamber, a bearing chamber and a flat cylindrical gear chamber are arranged eccentrically from the bearing chamber and the rotor chamber, which are piled sequentially along... | 03/10/2009 |
| 7481633 | Rotor with cut-outs A gerotor device having a rotor and a stator, the rotor including a plurality of teeth defining a profile, each tooth being divided by a tooth axis. At least one tooth includes an inner recess and an outer recess spaced from the inner recess along the profile. ... | 01/27/2009 |
| 7467934 | Axial piston engine with integrated filling pump The invention relates to an axial piston engine with a filling pump integrated in a receiving bore of the axial piston engine, which filling pump comprises a gerotor set with an externally toothed inner ring and an internally toothed outer ring and also an inner thr... | 12/23/2008 |
| 7434563 | Rotary engine The rotary engine includes a cylinder body having a cylinder chamber, an intake port, an exhaust port, and a spark plug, and a rotor which is received in the cylinder chamber to eccentrically rotate while coming into contact at seal faces thereof with an inner circu... | 10/14/2008 |
| 7435066 | Oil pump The present invention provides an oil pump in which eroding of the inside of the pump due to cavitation and erosion is prevented by minimizing the pressure change in a fluid when inter-tooth spaces formed by an inner rotor and an outer rotor transport the fluid from... | 10/14/2008 |
| 7413424 | Gear pump and holding element therefor The gear pump unit (100) comprises a pump cover (1), an internal rotor (16) mounted rotatably in a recess (9) of the pump cover (1) and formed in a rotationally fixed manner on a driven plug-in shaft (11), and an external ro... | 08/19/2008 |
| 7407374 | Hydraulic machine The invention concerns a hydraulic machine with a toothed set comprising a toothed ring with an inner toothing, whose circumferential surface extends in parallel with its axis, and a gear wheel (3) with an outer toothing, whose circumferential surface (24 | 08/05/2008 |
| 7384251 | Trochoidal oil pump A trochoidal oil pump which makes it possible to achieve an improved reduction in discharge pulsation and noise, and which makes it possible to realize such a reduction using an extremely simple structure. The trochoidal oil pump of the present invention comprises a... | 06/10/2008 |
| 7361002 | Oil pump An oil pump to be insatalled to an engine of an automotive vehicle. The oil pump includes a section defining a suction port and a section defining a discharge port. A main unit of the oil pump has a section defining a plurality of pump chambers. Volume of each pump ... | 04/22/2008 |
| 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 |
| 7322808 | Balancing plate—shuttle ball A pressure compensation mechanism for a gerotor motor is disclosed, which mechanism includes a shuttle valve that selectively interconnects either port to a single pressure chamber and thus to compensate for any pressure-induced imbalances in the device. ... | 01/29/2008 |
| 7318422 | Fluid pump assembly A fluid pump includes an electric motor with a casing and a drive shaft extending from the casing, a pumping element coupled to the drive shaft for rotation with the shaft to take in fluid and discharge it under pressure. The fuel pump casing may be sealed and a hou... | 01/15/2008 |
| 7287969 | Rotary fluid pressure device and improved brake assembly for use therewith A rotary fluid pressure device defining a fluid inlet (17), an output shaft (37), and a housing (41,43) defining a brake chamber (61), a piston member (63,65) being disposed therein and biased toward an engaged position by a spring... | 10/30/2007 |
| 7255544 | Housing including shock valves for use in a gerotor motor A housing for a motor having fluid passages integrated within. The passages include a first passage for receiving a fluid from outside the motor, a second passage for directing the fluid away from the motor, and at least one other passage from conveying the fluid to... | 08/14/2007 |
| 7240422 | Apparatus for semiconductor chip detachment An apparatus and method is provided for detaching a semiconductor chip from an adhesive tape on which it is mounted. The apparatus comprises a platform adapted to contact the adhesive tape at a position of the chip and a retaining force generator coupled to the plat... | 07/10/2007 |
| 7220111 | Hydraulic pump A fluid pump includes a housing having a lateral wall and an end wall, an insert located in the housing surrounded by the lateral wall and including a body having a central aperture and inlet and outlet fluid channels. A seal, located between the end wall and the in... | 05/22/2007 |
| 7188472 | Method and hydromachine for controlling a displacement The invention concerns a method and a hydromachine with a commutation device and with expanding and contracting pressure chambers passed by fluid and formed by displacement arrangements. With the method and the hydromachine, it is endeavoured to control a displaceme... | 03/13/2007 |
| 7182170 | Gerotor and bearing system for whirling mass orbital vibrator A gerotor and bearing apparatus for a whirling mass orbital vibrator which generates vibration in a borehole. The apparatus includes a gerotor with an inner gear rotated by a shaft having one less lobe than an outer gear. A whirling mass is attached to the shaft. At... | 02/27/2007 |
| 7184202 | Method and system for packaging a MEMS device A MEMS-based display device is described, wherein an array of interferometric modulators are configured to reflect light through a transparent substrate. The transparent substrate is sealed to a backplate and the backplate can contain electronic circuitry for contro... | 02/27/2007 |
| 7156628 | Wobblestick with helix A wobblestick with driving teeth with a helix which is equal to or less than 1° of the running angle of the wobblestick. ... | 01/02/2007 |
| 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 |
| 7125020 | Vented high pressure shaft seal A rotary fluid pressure device (11) having a housing (13,31), inlet and outlet ports (21,23), a gerotor gear set (15), a valve member (51) and an input-output shaft (49). A seal assembly (73) is disposed radially betw... | 10/24/2006 |
