Class 74/665GD - Helical

Subclass of Class 74 - Machine element or mechanism
No. of patents: 33
Last issue date: 08/12/2008

Number	Title	Issue Date
7410442	Transmission containing helical gearing and bearing arrangement therefor A transmission for a wind turbine includes a housing (20) in which two shafts (26, 28) rotate, each being supported on a locating bearing (50, 60) which transmits thrust loads to the housing as well as radial loads and on a nonlocating bearing (...	08/12/2008
7392775	Helical cam device and method A helical cam device for use with a wide variety of applications generally includes a first cam component, a second cam component and an axial guide. The cam components each have a helical cam track located on an axial end, so that coaxial alignment of the two cam c...	07/01/2008
7370550	Power take-off unit A power take-off unit includes an input shaft for operative connection to a source of motive power and a first drive gear operatively mounted to the input shaft and having a first set of drive teeth. The power take-off unit also includes a second drive gear having a...	05/13/2008
7198243	Longitudinal seat adjustment device The invention relates to a longitudinal seat adjustment device comprising an upper rail (40) and a lower rail (10). The upper rail (40) sits in the lower rail (10). Between the two rails (10, 40) a spindle (14) is fixedly co...	04/03/2007
7192089	Automotive seat with a backrest whose position can be electrically adjusted In the case of a vehicle seat (1), in particular rear seat or rear seat bench, having a seat part (2) and having a backrest (3) which has a foldover function brought about with an electric drive, the foldover function bringing about a folding ov...	03/20/2007
7100985	Seat in particular a vehicle seat preferably an aeroplane seat A seat includes a first seat piece (10) and a further seat piece (12), which may be adjusted for inclination by a controllable operating device (14). The operating device (14) engages the further seat piece (12) by at least two adj...	09/05/2006
7069802	Distributed power train (DGD) with multiple power paths An electric power-generating device with a rotor turned by an external source of energy, such as wind or water currents. The rotor is coupled to a main shaft. A pair of bull gears is located on the main shaft. A number of intermediate gears are located around a peri...	07/04/2006
6619157	Fluid actuated system for balancing of loads in multi-path geared transmissions A geared transmission having multiple power paths in which each of the power paths are operatively connected to a fluid chamber. Input gears on each of the power paths are axially moveable on a jack shaft in response to loading on the power paths. A fluid...	09/16/2003
6543314	Torque wrench assembly A torque wrench assembly system comprising a housing, a transfer shaft positioned in the housing, a first drive gear arrangement coupled to the transfer shaft; at least a second drive gear arrangement slidably coupled to the transfer shaft; a first drive ...	04/08/2003
6360626	Gear mechanism, especially for a double screw extruder A transmission arrangement for twin-screw extruders in which at least one reduction stage that includes a drive shaft, adapts speeds and torques to various applications. The output of the transmission is divided by a bifurcating stage which is connected t...	03/26/2002
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
5943919	Ball screw actuators A linear ball screw actuator assembly and a method of constructing it. The actuator assembly has a housing for a ball screw and ball nut which together define a raceway between them for a recirculating ball bearing train of balls, one of the screw and nut...	08/31/1999
5905927	Image forming apparatus and driving mechanism for image holding member In order to provide a driving mechanism for a photosensitive drum which is capable of reducing deformation of the shaft of the photosensitive drum caused by loads when transmitting a driving force, a drive transmission course 51 is diverged to at least tw...	05/18/1999
5876096	Power seat driving apparatus for a vehicle A driving apparatus which is capable of adjusting the forward and backward position and the height of a seat section by using a single motor to reduce the weight of the apparatus and simplify the structure. Nut members are mounted on operating threaded sh...	03/02/1999
5554081	Differential with distributed planet gears A parallel-axis torque-proportioning differential includes four sets of planetary gear pairs mounted within a differential housing having exterior dimensions substantially identical to those presently being used for comparable prior art designs. The four ...	09/10/1996
5528960	Power transmission apparatus A jacket having a pair of small helical gears is spline-fitted around a splined shaft. Since the small helical gears have an adverse helix angle to each other, the jacket moves along the spline shaft in the axial direction so as to distribute an equal tor...	06/25/1996
5528959	Multi-driving assembly of vehicle power seat A multi-driving assembly of a vehicle power seat for adjusting forward and backward movement and height of the front and rear portions of the seat. At a left side of the motor shaft of an electric motor (central portion of a vehicle) where no wide space i...	06/25/1996
5483853	Systems for adjusting vehicle seats A system for adjusting a vehicle seat comprises a plurality of adjustment mechanisms that are selectively driven by a common adjustment electric motor via gear units that are distributed within the seat, each gear unit being in the vicinity of a correspon...	01/16/1996
5462337	Power seat driving apparatus for a vehicle A driving apparatus which is capable of adjusting the forward and backward position and the height of a seat section by using a single motor to reduce the weight of the apparatus and simplify the structure. Nut members are mounted on operating threaded sh...	10/31/1995
5103691	Device for the motorized control of a set of elements such as the adjustable parts of a vehicle seat This device comprises a motor (1), the output shaft (2) of which carries two coaxial worms (5, 6), offset axially and with opposite pitches, two pairs of wheels, (7, 9, 8, 11) meshing with the worms, mutually in pairs, at the rate of two wheels (7, 8; 9, ...	04/14/1992
4787572	Multi-size tape cassette winding apparatus To provide for conjoint movement of reel tables (1,2) on which the centers of winding reels of cassettes having different reel spacing, for example from a set of cassettes, can be positioned, the reel tables are located on respective carriages (5,25) oper...	11/29/1988
4756207	Motor-speed reducer for the simultaneous driving of two structures The motor-speed reducer comprises an elongated tubular case (1) in which is disposed a motor (2) provided with two coaxial output shafts extending in opposite directions (4 and 6). Mounted on the end of each output shaft is an end portion (24) of a housin...	07/12/1988
4738107	Device in an actuator for elevation adjustment of work stations An actuator for variable adjustment of the pistons in hydraulic slave cylinders for regulation of for example the elevation adjustment of work stations. The pistons are actuated by way of a pusher which is non-rotatable but axially displaceable in the act...	04/19/1988
4627300	Positioning actuator for six-high roll stand A positioning actuator for use between a working-roll journal block and a roll-stand frame has a housing, a worm shaft rotatable in the housing about a main axis and formed with two axially offset worms, and respective worm wheels meshing with the worms a...	12/09/1986
4434606	Gear box for corn harvesting unit This compact gear box is intended for a corn harvesting unit having a pair of harvesting rolls and a pair of gathering chain assemblies. The gear box includes a drive shaft and first and second pairs of shafts connected to the harvesting rolls and the gat...	03/06/1984
4425823	Mechanism for controlling remotely disposed industrial valves and the like One or more remotely disposed valves may be opened or closed by a control handwheel by means of rotatable flexible shafting and mechanism associated therewith which may reduce the torque required to rotate the hand wheel and permitting much lighter weight...	01/17/1984
4395880	Double acting stirling engine phase control A mechanical device for effecting a phase change between the expansion and compression volumes of a double-acting Stirling engine uses helical elements which produce opposite rotation of a pair of crankpins when a control rod is moved, so the phase betwee...	08/02/1983
4361058	Divided thrust apparatus A gear drive has two closely spaced parallel output shafts driven by a single input shaft. One gear train connects the input shaft to one of the output shafts which has a thrust bearing at one end to absorb thrust loads. A second gear train connects the i...	11/30/1982
4297917	Power distribution gearing for double helix extruders A driving gear assembly for a double helix extruder. The assembly includes a multiple power path from a transmission gear to produce synchronism in the extruder helix shafts. The structure of the gearing enables a simple adjustment of the proper mesh of t...	11/03/1981
4286479	Drive system for a workpiece table of a machine tool A drive system for a workpiece table of a machine tool, especially a gear cutting machine, which includes two worm wheel drives of different transmission ratio, each worm wheel drive including a worm and a worm wheel. The worms of the worm wheel drives be...	09/01/1981
4164154	Transmission for two-worm press with counter running worms A transmission for a two-worm press having counter running worms in a worm housing, which includes: a transmission housing, an additional housing connected to the transmission housing and detachably connectable to the worm housing, a first and second tran...	08/14/1979
4044632	Twin channel reduction drive with electric motor The present invention applies to large and powerful geared mixer drives and aerators and broadly to geared reduction drives with a plurality of reducing steps, where the axis of an electric motor is offset from the axis of the power consumer and disposed ...	08/30/1977
3969956	Transmission for multiscrew extruder A transmission for a multiscrew extruder comprises a central spur gear meshing with several peripheral spur gears disposed symmetrically therearound, each gear having herringbone teeth with an annular gorge separating its sections of opposite pitch. The c...	07/20/1976

PatentStorm

Bizarre Patents

PatentStorm News

Class 74/665GD - Helical