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.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 8172718 | Planetary gear unit and method for producing a planetary gear unit A planetary gear unit (1) having two guide discs (2, 3) that are arranged parallel to one another and include perforations for accommodating pins (4) which have journals (5, 6) and shoulders arranged on the end sides. The shoulders have c... | 05/08/2012 |
| 8038570 | Axial thrust control for gearing An outboard thrust bearing assembly includes: a drawbolt, an inner end cap, an outer end cap, and at least one race of thrust bearings; the drawbolt for clamping the inner end cap to the outer end cap and about a pinion gear of a planetary gear, wherein the at least... | 10/18/2011 |
| 7448980 | Planetary gear assembly A planetary gear assembly includes a carrier, a planet shaft, a planet gear, and a plurality of rollers. The planet shaft is coupled to the carrier. The planet gear is rotatable about the planet shaft and the plurality of rollers are between the planet gear and the ... | 11/11/2008 |
| 7399253 | Washer and planetary gear set having the same A washer and a planetary gear set having the same, wherein the washer includes a first washer member and a second washer member. The first washer member is formed at a surface thereof with a plurality of first stepped portions each having a radially extending concav... | 07/15/2008 |
| 7387588 | Planetary gear train Disclosed is a planetary gear train (8) comprising an internal gear (24), a sun gear (52), a planet carrier (10) which is provided with planet shafts (18) and on which at least one planetary gear (20) is mounted, and a shift... | 06/17/2008 |
| 7361119 | Needle bearing and speed reducer using the needle bearing A radial inner end of a retainer is spaced radially outwardly from a radial outer end of a sliding-contact region, and with this construction the axial movement of each needle roller is limited not by the retainer but by an inner ring, and a restriction flange. Ther... | 04/22/2008 |
| 7339298 | Compliant motor driven variable electrical device A motor driven electrical device includes: a variable electrical device having a rotational variable control; a first support plate positioned above the variable electrical device; a motor support plate pliably attached to the first support plate using a pliable sep... | 03/04/2008 |
| 7329203 | Planet carrier for a gearbox A planet carrier (2) for a gearbox, especially an automatic or power shift gearbox, is provided, including at least one planet gear (4) which is connected to a sun gear and a rotor wheel. The planet carrier is embodied in two parts and is made in two b... | 02/12/2008 |
| 7297086 | Epicyclic gear systems An epicyclic gear system (A, B), which is highly compact, yet capable of transferring substantial torque, includes a sun gear (2, 62), a ring gear (4, 64) around the sun gear, and planet gears (6, 8, 66, 68) organized in two rows between the sun... | 11/20/2007 |
| 7294090 | Planetary gear device for reduction gearing A planetary gear device includes a housing having a chamber for receiving lubricating member and having an internal gear, a carrier rotatably received in the chamber of the housing and having an output shaft and having a number of openings for rotatably receiving pl... | 11/13/2007 |
| 7276012 | Radial needle-like roller bearing and pinion shaft There is adopted a constitution of arranging a spacer 53 at a shaft center portion and arranging a retainer 52 and a roller 51 (cage & roller) at two sides thereof in order to prevent the roller (roller) from being rolled at the center portion i... | 10/02/2007 |
| 7252615 | Lubrication system and method for hybrid electro-mechanical planetary transmission components This invention details a lubrication system for an automatic transmission, specifically the bearings of the planetary pinion gears. The planetary carriers have grooves formed in spider and flange sections thereof to carry the lubricating material from the inner diam... | 08/07/2007 |
| 7243749 | Motor-driven wheel small in size and improved in ride comfort and ease of assembly A motor-driven wheel includes a wheel disc, a wheel hub, a knuckle, a hub bearing, a constant-velocity joint, an in-wheel motor, and a spring. The center of swing of the constant-velocity joint is placed closer to the outside of the vehicle relative to the hub beari... | 07/17/2007 |
| 7189183 | Stop disk of a planetary gear Stop disks (9, 12) that on both sides delimit planet wheels (6) and that are provided on at least two evenly spaced-apart peripheral positions with inner axial passages (9.2, 12.2) that are linked with their respective location bores (9.1, 12... | 03/13/2007 |
| 7182709 | Planetary gear, gear motor and series of gear motors A series of gear motors, a gear motor, and a planetary-gear stage includes planet wheels that mesh with a sun wheel and inner gear teeth provided for the gear housing. The planet wheels are supported in a rotatable planet carrier, which forms the power take-off, and... | 02/27/2007 |
| 7121974 | Transmission, in particular epicyclic transmission A drive, particularly a planetary drive, comprising a drive shaft and at least one driven shaft which are connected by at least one element. The drive shaft and the driven shaft are mounted opposite the housing parts by bearings. The drive is characterized in that t... | 10/17/2006 |
| 7081067 | Planetary gear structure A planetary gear structure includes a carrier, a plurality of pinion shafts each inserted into a bore in the carrier, and a stopper plate arranged between a pair of the pinion shafts to hold the pinion shafts without any revolutions on its own axis. ... | 07/25/2006 |
| 7056259 | Epicyclic gear system An epicyclic gear system (A) has a sun gear (2), a ring gear (4) located around the sun gear, and planet gears (6) located between and engaged with sun and ring gears. In addition, it has a carrier (8) including a carrier flange (30 | 06/06/2006 |
| 7008348 | Gearbox for wind turbine A wind turbine gear box having a compound planetary gear arrangement having bearings providing improved reliability and with greater accessibility for servicing. The gear box has planet pinions and planet gears being rotated by a planet carrier around a sun gear whi... | 03/07/2006 |
| 6994651 | Epicyclic gear system An epicyclic gear system has a sun gear, a ring gear, and planet gears between the sun and ring gears. In addition, it has a carrier including a carrier flange offset axially from the planet gears and carrier pins that project from the flange into the planet gears, ... | 02/07/2006 |
| 6981930 | Integrated electric motor and traction drive An integrated electric motor and traction drive is disclosed. The device comprises an electric motor and a traction drive. The electric motor provides power at a high angular velocity to a sun roller. The sun roller transfers the power to the traction drive which re... | 01/03/2006 |
| 6918853 | Planetary gear mechanism A planetary gear includes a sun gear, a ring gear, a plurality of pinion gears geared with the sun gear and the ring gear, a plurality of pinion pins provided at internal peripheral side and coaxial to the pinion gear to be rotatable relative to the pinion gear, a c... | 07/19/2005 |
| 6893372 | Roller bearing, transmission using the same and differential gear In order to improve a seizure resistance as well as restricting of a dispersion of a rotation torque, surface roughness of a large diameter side end face (4A) of a tapered roller (4) is defined as a value satisfying both the following conditional expre... | 05/17/2005 |
| 6872049 | Wind turbine comprising a planetary gear A wind turbine with a rotor, a nacelle and a tower. The nacelle comprises a planetary gear (4) with a planetary holder (5), on which the hub (6) of the rotor is rigidly secured, and which can be connected to the shaft of an electric generator. T... | 03/29/2005 |
| 6857785 | Caged roller assembly and reduction gear unit using the same To provide a caged roller assembly having an excellent assimilability, capable of providing a relatively large load bearing capacity, excellent in roller guiding function, strength and accuracy, the caged roller assembly includes a cage 1 including an outer m... | 02/22/2005 |
| 6852061 | Planetary gearbox with integral electric motor and steering means. A new, useful and compact wheel motor drive arrangement for applications on such construction equipment as scissor lifts and other similar scaffolding equipment where hydraulically driven systems have historically been used to provide power to the wheels to move the... | 02/08/2005 |
| 6846258 | Gas turbine power generation facility There is provided a planetary reduction gear 10 between a gas turbine 1 and a generator 5. The planetary reduction gear includes elastic deformation unit 12 on an output side, and for the elastic deformation unit, a strain energy within a... | 01/25/2005 |
| 6824495 | Planetary gear for mounting on an electromotor A planetary gear for mounting on an electromotor is proposed, in which higher efficiency is achieved by positioning a sealing element (22) between a housing (2) and a sun gear shaft (4) on the input side, axially outside a receiving area (16 | 11/30/2004 |
| 6770007 | Epicyclic drive with unified planet assemblies An epicyclic drive has its planet gears integrated into separately built planet assemblies. Each planet assembly, in addition to its planet gear, includes a pin which extends through the planet gear and an antifriction bearing located between the gear and the pin. T... | 08/03/2004 |
| 6729995 | Multi-step gearbox A multi-step gearbox has a gearbox housing (1) and a first gear wheel (5) non-rotationally linked with the input shaft (2), a fourth (10) and fifth gear wheel (12) with a mutual fixed connection, a respective second (6) and ... | 05/04/2004 |
| 6723020 | Planetary carrier and method of manufacture A planetary carrier supports pinion gears of a planetary gear set via pinion shafts. Each hole in which a pinion shaft is mounted has a shallow hardened wall surface that is hardened by very-high-frequency induction heating and quenching. Therefore, the durability o... | 04/20/2004 |
| 6663531 | Method for assembling a planetary gear unit in a precise position The method for precise position assembling a planetary gear unit consisting of a planetary gear, a planet shaft, a bearing, two thrust washers and two guide washers, especially for use in a planetary transmission for an automatic transmission of a motor v... | 12/16/2003 |
| 6503168 | Planetary gear device for reducing speed of an output shaft of a motor A planetary gear device includes a bearing member mounted on an inner coupling annular wall surface of a planet carrier to support rotatably a force transmitting member relative to the planet carrier in an accommodating chamber of a mounting frame. A sun ... | 01/07/2003 |
| 6338691 | Gearing for power sharing in planetary transmission A planetary gear transmission has two or more planetary gear sets in the gear train. Each planetary gear set comprises a sun gear mounted on a sun shaft with the sun gear engaging a plurality of planet gears mounted on a planet gear carrier with the plura... | 01/15/2002 |
| 6220984 | Planetary gear The planetary gear according to the invention comprises a sun gear (2) connected to a driven central shaft (20), a ring gear (12), a group of first stepped planetary gears (8, 10) and a group of second stepped planetary gears (4, 6). The large step wheels... | 04/24/2001 |
| 6179743 | Gearing for power sharing in planetary transmission A planetary gear transmission has two or more planetary gear sets in the gear train. Each planetary gear set comprises a sun gear mounted on a sun shaft with the sun gear engaging a plurality of planet gears mounted on a planet gear carrier with the plura... | 01/30/2001 |
| 6135910 | Planet washer A substantially flat steel ring with a round perimeter and a central aperture has at least two arcuate slots concentric with the round perimeter. The arcuate slots are defined by arcs about the axis of the flat steel ring such that at least a portion of t... | 10/24/2000 |
| 6027423 | Arrangement for mounting a pinion gear within a housing of a differential assembly A differential assembly which includes a differential housing is disclosed. The differential assembly also includes a spider structure positioned within the differential housing. The spider structure has (i) a spider hub and (ii) a spider shaft which exte... | 02/22/2000 |
| 5795258 | Planet washer A substantially flat, steel ring having an axis, has an axial end face with two parallel chordal grooves disposed symmetrically about a central aperture. A flat end surface between the chordal grooves engages an adjacent planet gear and ends of rollers su... | 08/18/1998 |
| 5779588 | Drive for lifting equipment The invention concerns a lifting equipment drive consisting of a drive motor, a brake (6) and a dual-stage planetary transmission (9). Both planetary gear sets (8, 10) have helical gearing. The sun gear (15) of the second planetary gear set (10) has a flo... | 07/14/1998 |
