Sliding contact-type wave generator, strain wave gearing, and wave-generating method
Granted: January 5, 2021
Patent Number:
10883591
The wave generator of a strain wave gearing is provided with an ellipsoidally contoured wave generator plug and a wave generator bearing. The wave generator bearing is provided with an annular body fitted between inner and outer races in a sliding contact state. The annular body is composed of an endless coil spring and has a rigidity that is able to maintain a constant gap between the inner and outer races. The annular body also has a specified overall flexibility in the radial…
Transmission component set having an output bearing and a harmonic drive transmission which can be mounted thereon
Granted: December 29, 2020
Patent Number:
10876614
A transmission component set has a bearing ring (1) and a strain wave gear mounted thereon. Said strain wave gear comprises an input or drive component (2), a flexible or resilient transmission component (4) having external teeth (3), and a gear (6) having an internal teeth (5). The transmission component (4) is fitted onto the drive component (2) and thereby is elliptically deformable such that the external teeth (3) of the transmission component (4) engage with the internal teeth (5)…
Strain wave gearing with compound meshing that involves congruity of tooth surfaces
Granted: December 22, 2020
Patent Number:
10871213
The dedendum tooth profiles of the internal teeth and external teeth of a strain wave gearing are prescribed by a first homothetic curve BC and a second homothetic curve AC obtained from a curve segment from a point A, at which the angle formed by the tangent to a movement locus Mc when meshing is approximated by rack meshing and the major axis is ?A, to a low point B. The dedendum tooth profile of the internal teeth is prescribed by a curve formed on the internal teeth in the course of…
Rotation detecting device and hollow actuator
Granted: December 15, 2020
Patent Number:
10866123
A hollow type rotation detecting device has a 2-pole magnet ring and a multi-pole gear, the 2-pole magnet being coaxially fixed to the outer circumferential surface of the shaft end part of a hollow motor shaft that extends coaxially inside a cylindrical cover. In an annular gap between the cylindrical cover and the 2-pole magnet ring and multi-pole gear, rigid boards are arranged with an orientation facing in a tangential direction at prescribed intervals along the circumferential…
Strain wave gearing and actuator
Granted: December 15, 2020
Patent Number:
10865866
A strain wave gearing has a wave generator for generating a wave motion that repeatedly flexes each part in the circumferential direction of an externally toothed gear in the radial direction. The wave generator is provided with a plurality of wave-generating members arranged at positions at a prescribed angular interval along the circumferential direction of the externally toothed gear. Each of the wave-generating members is provided with an outer circumferential cam surface, rotates…
Silk hat-type strain wave gear device
Granted: November 3, 2020
Patent Number:
10823278
A silk hat-type strain wave gear device has a crossed roller bearing for supporting an internal gear and an external gear so as to allow relative rotation. A first gap part between the inner and outer rings of said bearing is sealed by an oil seal and a second gap part thereof is in communication with a gear-side gap part on the outside of the external gear. A bearing seal separates the second gap part from the gear-side gap part. The bearing seal prevents excessive inflow of lubricant…
Strain wave gearing having 3-dimensional meshing tooth profile
Granted: November 3, 2020
Patent Number:
10823259
A strain wave gearing wherein the tooth profile of an external teeth of a cup-shaped or silk-hat-shaped external gear is set as follows. The tooth-tip tooth thickness decreases gradually from an external-teeth outer end toward an external-teeth inner end along an external tooth trace direction. In addition, a pressure angle at a pitch point (P) increases gradually from the external-teeth outer end toward the external-teeth inner end along the external tooth trace direction. Thus, it is…
Derivatives of cephalosporin for treating cancer
Granted: November 3, 2020
Patent Number:
10821114
The present invention relates to a new class of cephalosporin derivatives of formula (I), notably having CXCR4 receptor antagonist effect, useful as a therapeutic agent for treating cancer, in particular for treating breast cancer, lung cancer and uveal melanoma. The invention further relates to a pharmaceutical composition comprising a compound of formula (I) and an additional antitumor drug for treating cancer.
Strain wave gearing
Granted: October 27, 2020
Patent Number:
10816073
In a strain wave gearing, a flexible externally toothed gear flexed by a wave generator meshes with a flexible internally toothed gear while in an overlapping meshing state. A floating ring, which supports the internally toothed gear from the outer circumferential side, maintains the overlapping state of the meshing and supports the internally toothed gear in a floating state that allows displacement following a state of radial flexion in the tooth trace direction of the internal teeth…
Movable coil type linear motor
Granted: October 27, 2020
Patent Number:
10819206
A linear motor includes a motor movable body which has symmetrical structure with respect to a vertical plane and a horizontal plane that include the motor center axis line. Two linear bearings disposed in a space on the inner side of a rectangular tubular movable coil of the motor movable body are disposed symmetrically to the left and right of the center axis line so that the bearing support center coincides with the motor center axis line. Thrust generation sections of the motor…
Virtual cable hub
Granted: October 13, 2020
Patent Number:
10802856
A virtualized Cable Modem Termination System (CMTS) that provides high speed data services to one or more remote physical devices (RPDs). The CMTS comprises one or more first servers that each perform packet switching and routing as well as one or more second servers that each perform CMTS functions for the one or more remote physical devices (RPDs). Each of the one or more first servers and each of the one or more second servers are each implemented entirely on commercial off-the-shelf…
Flexible external gear and strain wave gearing
Granted: October 13, 2020
Patent Number:
10801585
The flexible external gear of a strain wave gearing is provided with: a cylindrical body part capable of flexing in the radial direction; external teeth formed on the outer circumferential surface thereof with a constant pitch; and grooves formed on the inner circumferential surface of the cylindrical body section along the circumferential direction thereof with the same pitch as the external teeth. The grooves are grooves with a wave-shaped cross-sectional shape having the center line…
Strain wave gearing with full separation of two stresses
Granted: September 29, 2020
Patent Number:
10788115
In a strain wave gearing, the addendum tooth profile of an internal gear is defined by the formula a and that of an external gear is by the formula b at a principal cross-section located at a tooth-trace-direction center of the external gear, on the basis of a movement locus (Mc) of ?=1 of the teeth of the external gear with respect to those of the internal gear in the principle cross-section taken at the center of the tooth trace of the external gear obtained when the tooth meshing is…
Strain wave gearing with full separation of two stresses
Granted: September 29, 2020
Patent Number:
10788114
In a strain wave gearing, the addendum tooth profile of an internal gear is defined by the formula a and that of an external gear is by the formula b at a principal cross-section located at a tooth-trace-direction center of the external gear, on the basis of a movement locus (Mc) of ?=1 by the teeth of the external gear with respect to those of the internal gear. It is possible to avoid superimposition of flexion-induced bending stresses and tensile stresses caused by load torque at the…
Planetary gear device series
Granted: September 1, 2020
Patent Number:
10760648
In a planetary gear device series composed of eight kinds of planetary gear devices with gear reduction ratios of 3 to 10, the planetary gear device of each gear reduction ratio uses an internal gear with 108 teeth or a slightly different number of teeth, and the module is common among the planetary gear devices of all gear reduction ratios. The combinations of the sun gear teeth number Za and the internal gear teeth number Zc in the planetary gear device of each reduction ratio are…
Magnetic type rotation transmitting mechanism
Granted: August 25, 2020
Patent Number:
10753450
A magnetic type rotation transmitting mechanism has a rotating plate made of a magnetic material, and a magnet to which the rotational movement of the rotating plate is transmitted through a magnetic coupling between the magnet and the rotating plate. When the rotating plate is rotated, a plurality of oblique edge portions formed on the outer peripheral edge of the rotating plate rotate while sequentially passing through a magnet-facing area. The oblique edge portions move in the…
Rotary actuator provided with strain wave reduction gears
Granted: August 25, 2020
Patent Number:
10753427
A rotary actuator has: one motor, two strain wave reduction gears disposed symmetrically on both sides of the motor, and one output shaft. The output rotation of the motor is reduced in speed at the same reduction ratio by the two strain wave reduction gears and is outputted from the output shaft to a load side. The first and second externally toothed gears of the first and second strain wave reduction gears are flexed into ellipsoidal shapes with 90 degrees shifted in phase, and are…
Browsing and viewing video assets using TV set-top box
Granted: August 18, 2020
Patent Number:
10750241
Roughly described, a system and method for delivering video content to a user's client device in a video-on-demand (VOD) system, which includes providing a collection of video segments, the segments having a predefined default sequence; establishing a streaming video session according to a session-oriented protocol; transmitting toward the client device a script executable by the client device, the script operable to transmit navigational codes toward the head-end equipment in response…
Method for lubricating strain wave gearing
Granted: July 21, 2020
Patent Number:
10718419
A strain wave gearing has contact parts which are the portions to be lubricated other than the teeth of an externally toothed gear and an internally toothed gear, the contact parts being respectively lubricated with an inorganic lubricating powder having a lamellar crystal structure. The lubricating powder, during the operation of the strain wave gearing, is crushed between the contact surfaces of each of the contact parts to move and adhere to the contact surfaces, thereby forming thin…
Wave generator and strain wave gearing
Granted: July 21, 2020
Patent Number:
10718420
A strain wave gearing has a wave generator provided with a plug and a roller bearing. The roller bearing is provided with flange plates fixed to both sides of the plug, and outer circumferential edge portions of the flange plates protrude outwardly from a plug outer circumferential surface so as to locate on both sides, in an axial line direction, of the raceway of rollers. The movements of the rollers in the axial line direction are constrained by the outer circumferential edge…
