Did You Know...
...that the inventor of the electric motor was a blacksmith named Thomas Davenport? Described as "a brilliantly unsuccessful inventor", Davenport invented the first rotary electric motor. In 1836 he headed out -- on foot -- from his Vermont home to file a patent application at the Patent Office in Washington, D.C. By the time he got there, he had squandered away his money and couldn't afford the $30 filing fee so he turned around and went home. When he later mailed in his application with money he'd raised, the Patent office was destroyed in a fire. He did finally get credit for his invention on Feb. 5, 1837.
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| Number | Title | Issue Date |
| 7421921 | Parallel axes type automatic transmission A parallel axes type automatic transmission including a first input shaft having m or more (m is an integer not less than 2) wet multiplate clutches and drive gears rotatably mounted, a second input shaft having n or more (n is an integer greater than m and not less... | 09/09/2008 |
| 7357745 | Travel working machine A travel working machine includes a traveling body 2 supported by traveling contrivances such as wheels 3, 4 and provided with an engine 5, a transmission case 8 mounted to the traveling body, and a hydraulic mechanical transmission mount... | 04/15/2008 |
| 7353784 | Rotary internal combustion engine A rotary internal combustion engine has a circular inner chamber, which houses a plurality of cylinders with reciprocating pistons that move in a radial direction towards and away from the center of the inner chamber. A flywheel with distinct vanes or portions is po... | 04/08/2008 |
| 7326142 | Partition structure of power train device A partition structure of a power train device is provided with: a second differential coupled with an external first differential so as to receive a driving force input to the first differential; a case having a first end facing to the first differential, a second e... | 02/05/2008 |
| 7320384 | Gearbox for gardening machine A gearbox includes a housing having therein a receiving chamber, a transmission gear wheel mounted in the receiving chamber for rotation driven by an external driving force, an eccentric shaft assembly mounted in the receiving chamber and coupled to the transmission... | 01/22/2008 |
| 7287508 | Engine lubrication method An engine lubrication method is provided. The four-cycle engine has a lightweight aluminum alloy engine block having a cylindrical bore and an enclosed oil reservoir formed therein. A crankshaft is rotatably mounted in the engine block for rotation about a crankshaf... | 10/30/2007 |
| 7273132 | Method and apparatus for lubricating bearings on a vertical shaft in a gearbox A right angle gear box includes a plurality of channels for carrying lubricating fluids to one or more upper bearing. Fluids in the gear box are naturally pumped through the channels by the rotation of gears in the gear box. The area between the shaft and the extern... | 09/25/2007 |
| 7243632 | Small four-stroke gasoline engine with oil mist lubrication The present invention relates to a small four-stroke gasoline engine with oil mist lubrication. The lubrication oil way of the engine includes a crankshaft chamber B, a camshaft chamber C, an upper rocker arm chamber D and a condensation chamber E. The camshaft cham... | 07/17/2007 |
| 7229376 | Adjustable drain-back baffle A lubrication system of an axle assembly comprising a differential carrier rotatably supporting a differential case therewithin, an axle tube extending outwardly from the differential carrier, a bearing assembly for rotatably supporting the differential case within ... | 06/12/2007 |
| 7216751 | Torque transmission coupling In order to form a torque transmission coupling to be compact, the present invention provides a torque transmission coupling (1) comprising input-output rotary members (57, 59) rotatably supported to perform input-output transmission of torque; a frict... | 05/15/2007 |
| 7213682 | Hydraulic fluid storage apparatus for a transmission A hydraulic fluid storage apparatus for a transmission has a main sump and a secondary sump. The secondary sump is connected with the main sump through a restricted flow passage. The fluid within the main sump is subjected to centrifugal forces by rotating component... | 05/08/2007 |
| 7210374 | Support for gear bearing elements A housing (40) for a gear unit, the housing being formed by a moulding process including casting, pressure casting, injection moulding or like processes. The housing (40) of the invention comprises housing walls and support for bearing elements of a ge... | 05/01/2007 |
| 7178426 | Enhanced lubrication system for drive axle assemblies An improved lubrication system for drive axle assemblies is provided that uses a collector in connection with a filter plug to lower the dynamic lubricant level in the drive axle assembly and filter contaminants in the lubricant sump. The collector is affixed to a c... | 02/20/2007 |
| 7152567 | Piston for an internal combustion engine The invention relates to a piston for an internal combustion engine comprising piston-pin bores, into which lubrication grooves that run around the nadir and equator zones of said bores are machined. The aim of the invention, is to simplify the production of the pis... | 12/26/2006 |
| 7152711 | Spline lubrication apparatus for lubricating a spline A spline lubrication apparatus is disclosed for lubricating a spline of a pump drive. The apparatus includes a housing and a rotatable spline disposed within the housing. The spline includes a shaft having a first and a second end and an external surface extending b... | 12/26/2006 |
| 7140995 | Gear drive In a gear drive for a motor vehicle comprising a first gear, a second gear in engagement with the first gear, an oil sump arranged below the second gear such that the second gear is partially immersed in the oil sump, and an oil collection structure disposed at a le... | 11/28/2006 |
| 7124857 | Rotating shaft scavenging scoop A bearing scavenge system comprises a scavenging passage extending axially through a rotating shaft supported by the bearing assembly. Oil and air are drawn from an oil cavity of the bearing assembly and evacuated through the rotating shaft as the shaft rotates.... | 10/24/2006 |
| 7025701 | Oil propeller wheel and shaft for power transmission devices A power transfer device includes a casing, a lubricant reservoir in the casing having lubricant therein, and a shaft rotatably supported in the casing. The shaft extends into the lubricant reservoir. A lubricant driving structure is coupled to the shaft for common r... | 04/11/2006 |
| 6997284 | Lubricant cooling system for a motor vehicle axle In a driven axle assembly (12) for a motor vehicle that includes a differential housing located substantially in the center of the axle and tubes (16, 17) extending laterally from the differential, surrounding axle shafts (20) and opening into a... | 02/14/2006 |
| 6978757 | Lubrication structure in engine A lubrication structure for splash lubrication in an engine includes an oil collector formed as a depression in the outer peripheral surface of the crank pin and an oil groove provided on the big-end of the connecting rod. The oil collector is formed approximately a... | 12/27/2005 |
| 6938731 | Drive axle assembly with insert A drive axle assembly is provided which includes a gear housing and differential gear set. An insert is provided which is disposed in a lubricant reservoir of the gear housing. The insert directs lubricant away from the reservoir upon rotation of the differential ge... | 09/06/2005 |
| 6913438 | Pump lubrication system including an external reservoir A circulating lubrication system for a centrifugal pump, or other rotating equipment utilizing an oil sump, is disclosed. The lubrication system includes an external reservoir located distant from the main lubrication chamber, so that lubricating fluid from the main... | 07/05/2005 |
| 6910398 | Lubrication system and method of lubricating an internal-combustion engine An apparatus and method for lubricating an internal-combustion engine includes a shaft extending through a gearbox, a gear and a sliding sleeve coupled to rotate with the shaft and adapted to move axially along the shaft, a gearshift fork in mating engagement with t... | 06/28/2005 |
| 6863043 | Multi-position, operator-carried, four-cycle engine A power tool having a rotary implement driven by a four-cycle engine. The engine crankcase is through a passageway which extends through a camshaft to a valve chamber. The rotating shaft member inhibits the escape of lubricating oil when the engine is running while ... | 03/08/2005 |
| 6736240 | Lubrication mechanism for a cam drive A cam drive is provided for a valve control of a mixture-lubricated internal combustion engine that has a cylinder, and a cylinder head in which is disposed a poppet valve which is actuated by a pivotable rocker arm. Mounted in a cam chamber is a control cam that is... | 05/18/2004 |
| 6688432 | Piston compressor The invention concerns a piston compressor, particularly a hermetically enclosed piston compressor, with a housing, in which a motor is arranged, the motor having a crankshaft with a vertically standing crank pin that has in its upper front side an openin... | 02/10/2004 |
| 6666184 | Multi-position, operator-carried, four-cycle engine A power tool having a rotary implement driven by a four-cycle engine. The engine crankcase is through a passageway which extends through a camshaft to a valve chamber. The rotating shaft member inhibits the escape of lubricating oil when the engine is run... | 12/23/2003 |
| 6644439 | Transmission for an internal combustion engine In a transmission for an internal combustion engine including an oil sump and an oil pump operatively in communication with the oil sump, an oil reservoir is provided for receiving oil from the oil sump when the transmission is in direct drive and power i... | 11/11/2003 |
| 6616432 | Fluid pump mechanism for use in existing helical gearsets A fluid pump cowling for attachment to at least a pair of helical drivetrain gears having teeth and lands. The cowling has a pair of sidewalls adapted to extend at least partially over the lands of a first of the pair of drivetrain gears and a curved sump... | 09/09/2003 |
| 6604608 | Lubrication system and method of lubricating an internal-combustion engine An apparatus and method for lubricating an internal-combustion engine includes a shaft extending through a gearbox, a gear and a sliding sleeve coupled to rotate with the shaft and adapted to move axially along the shaft, a gearshift fork in mating engage... | 08/12/2003 |
| 6578466 | Sheet-processing machine A sheet-processing machine operating in cycles, inter alia a shaping press, during which a cyclic excess air pressure is produced in a covered part of the machine, where the covered part has an opening (6) on the perimeter of which a diaphragm is fixed, t... | 06/17/2003 |
| 6523435 | Differential gear casing for a motor vehicle A differential gear for a motor vehicle, comprises a casing, an input shaft, two output shafts, and a differential supported within the casing. The casing comprises two casing parts connected to each other along a separation plane which is oriented perpen... | 02/25/2003 |
| 6516789 | Centrifugal supercharger having lubricating slinger A centrifugal supercharger includes a case presenting a compressor chamber and a transmission chamber. An impeller in the compressor chamber is mounted to a shaft that extends into the transmission chamber. The impeller shaft is drivingly connected to a p... | 02/11/2003 |
| 6510829 | Handheld type four-cycle engine In a handheld type OHV engine, an oil tank is provided so as to be connected to one side wall running the length of a crankcase and a cylinder block, the oil tank houses oil mist generation means to and a rotational movement section of a valve operation m... | 01/28/2003 |
| 6460656 | Dilating lubricant flinger A lubricant flinger, for providing lubricant fluid to bearings on a horizontal shaft within a wet-sump bearing housing, has a rotationally balanced body with portions extending radially sufficiently to reach below a lubricant level in the wet-sump. The bo... | 10/08/2002 |
| 6439208 | Centrifugal supercharger having lubricating slinger A centrifugal supercharger includes a case presenting a compressor chamber and a transmission chamber. An impeller in the compressor chamber is mounted to a shaft that extends into the transmission chamber. The impeller shaft is drivingly connected to a p... | 08/27/2002 |
| 6394061 | Lubricating system in a 4-cycle engine An oil reservoir chamber, a crank chamber and a valve-operating chamber are provided in an engine body. The oil reservoir chamber and the crank chamber are in communication with each other through a through-hole, and the crank chamber and the valve-operat... | 05/28/2002 |
| 6374951 | Gear isolation shroud for transmission An improved splash-type lubrication system (100) for a change-gear transmission (102). A closely fitting gear shroud (104) is provided with upper openings (106, 108, 110) allowing the countershaft and main shaft gears to mesh and directs splashed lubrican... | 04/23/2002 |
| 6363904 | Multi-position, operator-carried, four-cycle engine A power tool having a rotary implement driven by a four-cycle engine. The engine crankcase is through a passageway which extends through a camshaft to a valve chamber. The rotating shaft member inhibits the escape of lubricating oil when the engine is run... | 04/02/2002 |
| 6227160 | Operator carried power tool having a four-cycle engine and engine lubrication method An engine powered hand-held power tool and engine lubrication method is provided, the power tool being intended to be carried by an operator during use. The power tool has a frame, including a handle to be grasped by the operator, an implement affixed to ... | 05/08/2001 |
