Class 74/424.5 - Spiral

Subclass of Class 74 - Machine element or mechanism
Definition: Gearings of the spiral type.
No. of patents: 32
Last issue date: 03/27/2012

Number	Title	Issue Date
8141447	Spiral-toothed gear wheel for rack and pinion steering A spiral-toothed gear wheel for a rack and pinion steering. The spiral-toothed gear wheel includes a pinion, which meshes on the power take-off side with a toothed rack, and a spiral-toothed gear, which is arranged on the pinion on the drive side in such a way that ...	03/27/2012
7694599	Gearing as well as a rotary encoder equipped with such gearing A gear mechanism includes a rotating input element, a rotating output element, and at least one first force transmission device arranged along a spiral line on a face of the input element. A second force transmission device is arranged along an encircling line on a ...	04/13/2010
7472619	Gear unit A gear unit includes a housing, two shafts arranged parallel with one another and each supporting a helically cut toothed gear, and two pairs of bearings supported by or relative to the housing in an arrangement in which each pair of bearings rotatably supports a sh...	01/06/2009
7421922	Device for linearly moving a useful mass A device for linearly moving a useful mass is described. Typically, when a large useful mass is moved, relatively large forces are transferred by a spindle or a toothed rack to the corresponding machine or machine frame. These forces can be compensated by moving a c...	09/09/2008
7346992	Hand-held power tool with angle drive A hand-held power tool (2) includes an angle drive (20) for connecting the motor-driven driving shaft (6) and the driven shaft (10) connected with a tooth holder (24) for joint rotation therewith, and having drive toothing (14	03/25/2008
7252020	Vehicle drive-train including a clutchless transmission, and method of operation A vehicle drive-train includes a drive-motor having an output shaft and a transmission having an input shaft, an output shaft, a plurality of discrete forward gear ratios and a corresponding plurality of synchronizers. Each of the synchronizers is configured to mech...	08/07/2007
7223020	Bearing assembly A bearing assembly including a bearing having an outer bearing ring and an inner bearing ring. The outer bearing ring is axially received in a bearing-receiving recess that includes a substantially cylindrical inner wall. An element that is radially flexible is loca...	05/29/2007
7156217	Motion transmitting apparatus A motion transmitting apparatus wherein an electric motor, an engine or another prime mover rotates an axially fixed first part relative to a coaxial axially movable non-rotatable second part. The structure which serves to move the second part axially in response to...	01/02/2007
7044724	Screw compressor and method of manufacturing rotors thereof A screw compressor comprises a casing, and a male and a female rotor formed with axially twisted screw grooves and accommodated in the casing, the both rotors being rotated by timing gears fixed to the respective rotors while a desired minute gap is kept therebetwee...	05/16/2006
6991573	Steering actuator of independent steer-by-wire system A steering actuator of an independent type steer-by-wire system comprises a housing fixed to a vehicle body and an ultrasonic motor. The ultrasonic motor has a stator internally fixed to the housing and a rotator rotating relative to the stator when an electric curr...	01/31/2006
6912927	Modular-flexible wormshaft assembly A worm shaft is provided with an intermediate worm thread section between first and second end structures, wherein at least one of the first and second end structures has a coupling structure for a desired extension of a plurality of modular worm shaft extensions. T...	07/05/2005
6609440	Structure of a variable transmission device A structure of a variable transmission device includes an input shaft driven by a motor to perform alternate rotation having a gear on a middle portion, an output shaft having a pair of gears secured to the upper and lower ends respectively and a speed ch...	08/26/2003
6089116	Gearing stage In a gearing stage, a driving first wheel has a ferromagnetic profiled rib which is circumferential in one thread, whereas a second driven wheel has permanently magnetic profiled ribs which are disposed in a multi-start manner and which extend only over a...	07/18/2000
5295433	Value selection mechanism including means for weakening a shaft thereof Value selection and printing apparatus comprising, structure for printing a value, the structure including a rotatable device and a drive shaft, structure for selecting the value, the value selecting structure including a first rack gear slidably movably ...	03/22/1994
5247846	Quick disconnectable screw device A quick-disconnectable device with a screw piece, a first threaded part and a second threaded part, the threaded of which fits with the first threaded part, wherein the screw piece has a straight guide for the first threaded part, and the screw piece has ...	09/28/1993
5129276	Meshing gear members A drive mechanism has two parallel shafts (2,3) provided with overlapping circumferentially-extending spiral teeth (4,5) of the same hand. The shape and positioning of the teeth is such that when one of the shafts is rotated, the steep flank surfaces (7,9...	07/14/1992
5074831	Limited-slip differential with meshing pairs of worms A limited-slip differential gear comprising a differential gear case which is adapted to be driven and in which two coaxial side gears and at least one pair of differential pinions cooperating with each other and associated with the side gears are rotatab...	12/24/1991
5060531	Screw rotor One of male and female rotor elements is coated with a coating which is different in hardness from the other uncoated element. Even when the rotor elements come to contact with each other during the operation due to thermal expansion or the like, because ...	10/29/1991
4955248	Angular gear for venetian blinds The present invention relates shortly to an angular gear (1) for use in venetian blinds for angular adjustment of the venetian blind laths from a place beside the venetian blind. The angular gear (1) consists of three parts, a gear housing (2), a shaft (3...	09/11/1990
4695233	Screw rotor mechanism A pair of dry-sealed screw rotors for compressors which includes rotor tooth profiles in which an inter-tooth gap at a profile point on male and female rotor of a normal temperature is determined by an amount of interference due to thermal expansion cause...	09/22/1987
4656884	Power transmission mechanism A power transmission mechanism in which a small rotatable screw thread is arranged symmetrically with a large rotatable screw thread. The pitch and the pitch circle diameter of the large screw thread are the same integer times the pitch and the pitch circ...	04/14/1987
4649814	Rotary value selector device A postage meter has a print drum with print wheels which are shiftable to select the value of the postage. The positions of the print wheels are controlled by the positions of axially displaceable racks which in turn are controlled by a helical nut and pi...	03/17/1987
4615230	Gear transmission comprising two worms The driving shaft (11) is equipped with two oppositely threaded worms (13a, 13b) with which respectively mesh on opposite sides two worm-wheels (14a, 14b) of a first kinematic channel and two worm-wheels (16a, 16b) of a second kinematic channel, and the w...	10/07/1986
4478103	Worm gear mechanism A worm (10) and worm gear (12) mechanism in which the gear (12), in addition to its gear teeth (20), also has a helical thread (22) formed thereon. The helical thread (11) of the worm (10) conventionally meshes with the gear teeth (20) of the worm gear (1...	10/23/1984
4416168	Transmission and sub-transmission with mutually contending helical gears A transmission including a main transmission and a subtransmission. The subtransmission is a planetary gear mechanism incoporating a sun gear, planetary pinions, and a ring gear. The main transmission incorporates a tubular intermediate shaft and an outpu...	11/22/1983
4307629	Torque converter A torque converter for inclusion between a driving shaft and a driven shaft. Preferably there is more than one torque generator and a gear train in parallel between the input and output shafts. The torque generators and any attached driving gears rotate a...	12/29/1981
4297919	Mechanical power transmission method and means A particularly compact and efficient transmission includes one or more helix-like races having a common axis of rotation, a support member extending along the axis, one or more bearing units axially fixed to the support member and with their peripheries p...	11/03/1981
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
4147223	Logging-while-drilling apparatus A logging-while-drilling apparatus having an asymmetrically efficient drive train for connecting a motor to a signal-generating rotary valve. The drive train includes a transmission which efficiently transmits torque from its input to its output but preve...	04/03/1979
4144775	Transmission for a two-worm press with counter running worms A transmission for a two-worm press with two counter-running worms, which includes two transmission output shafts respectively connectable to the two counter-running worms, first gears laterally offset relative to each other. These first gears are driving...	03/20/1979
4142422	Speed ratio change mechanism A gear train transmits power to a higher angular speed. A drive pinion has a spur gear design for meshing with a spur toothed portion of an intermediate gear. The intermediate gear also has a helical toothed portion following a path which axially moves to...	03/06/1979
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

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Class 74/424.5 - Spiral