Gear for wave gear drive
Granted: April 24, 2001
Patent Number:
D440993
Silk hat flexible engagement gear device
Granted: March 20, 2001
Patent Number:
6202508
A flexible engagement gear device (11) has a silk-hat shaped flexible external gear (13) which has a body part (22), a diaphragm (23) and a boss (25). The diaphragm (23) has a plate-shaped part (28), a sectional shape of which, when cut along a plane including a device axial line (11a), is defined at one side by a straight line (232) extending in a radial direction, and at the other side by a first convex circular arc (240), a concave circular arc (250) and a second convex circular arc…
Roll up shade doubled fabric having patterns thereon
Granted: February 20, 2001
Patent Number:
6189592
A roll-up shade is doubled and its ends suspended from a head rail that is mounted above a window. One end is attached to a roller tube and the other end is attached to a stationary tube, with a bight being formed between the tubes. A first sheet is defined from the bight to the roller tube and a second sheet is defined from the bight to the stationary tube. A weighty rod is positioned in the bight to cause the bight to sag away from the head rail, and a shade guide surrounds the rod to…
Cup-type wave gear device
Granted: February 6, 2001
Patent Number:
6182532
A cup-type wave gear device 1 comprises a cup-shaped flexible external gear 4 which has a boss 43 formed at its outer circumferential surface with an external thread 43b. An output shaft 6 is formed on Its end surface with an annular recess whose inner circumferential surface is formed with an internal thread 61. The external thread 43b of the boss 43 is screwed into the internal thread 61 of the output shaft 6. Further, driving pins 8 are used to fasten the boss 43 to the output shaft…
Torque detection mechanism for a flexed meshing type gear drive
Granted: January 9, 2001
Patent Number:
6170340
A cup-shaped flexible external gear 3 of a flexed meshing type gear drive 1 is flexed into an elliptical shape by a wave generator 4. A first torque detection device 6 is disposed on a portion of the external gear 3, for example, on a diaphragm 33 thereof which has a pair of torque detection elements arranged at an angular interval of 90° around a center axis 1a. Likewise, a second torque detection device 7 is also disposed, which has a pair of torque detection elements arranged at…
Flexible meshing type gearing having three-dimensional, non-interactive wide-area intermeshing tooth profile
Granted: January 2, 2001
Patent Number:
6167783
The meshing of the rigid internal gear and the cup-shaped flexible external gear of a flexible meshing type gear device is simulated with racks, similarity transformation is effected on the composite curve consisting of the envelope obtained by axially projecting the movement loci of the rack teeth relative to each other from the tooth trace opening portion to the tooth trace inner extremity in sections perpendicular to the axis and the movement locus in the vicinity of the tooth trace…
Recording and playback of audio-video transport streams
Granted: January 2, 2001
Patent Number:
6169843
A method and apparatus for recording and playback of transport stream packets including multiplexed audio, video and other data streams. The transport streams may be generated in accordance with an MPEG-2 standard. In a record mode, an arrival timestamp is generated for each input transport packet to be recorded in a peripheral storage device. A given arrival timestamp indicates the arrival time of the corresponding transport packet in the recording system. Each of the transport packets…
Planetary gear device
Granted: October 10, 2000
Patent Number:
6129648
A planetary gear device (20) comprises a front-stage side planetary gear mechanism (21) and a rear-stage side planetary gear mechanism (23). The rear-stage side planetary gear mechanism (23) comprises an internal gear (25), a carrier (29) rotatably supported by a pair of main guide bearings (26,27) disposed on both sides of the internal gear (25), a plurality of planetary gears (31) rotatably supported on a plurality of planetary shafts (30) extending between a pair of carrier parts…
Gear for wave gear drive
Granted: September 26, 2000
Patent Number:
D431255
AC power passing RF choke with a 15 gauge wire
Granted: September 19, 2000
Patent Number:
6121857
An RF choke for separating or joining an RF signal and an AC power signal on e.g. a CATV transmission line has a large current carrying capacity. The RF choke uses 14 to 16 gauge magnetic wire in order to carry currents as high as 15 amps. In addition, the RF choke has excellent performance as measured by RF frequency response and hum modulation.
Automatic compensation of CNR and OMI in a laser transmitter
Granted: September 19, 2000
Patent Number:
6122302
A laser transmitter used in an optical communication system provides automatic compensation/stabilization of CNR (carrier to noise ratio) and OMI (optical modulation index) in conditions that would have caused these parameters to change if the compensation circuitry was not employed. The compensation circuitry is an open loop that operates in conjunction with a conventional APC (automatic power control) loop. When certain parameters change (i.e., temperature, laser aging, intentional…
Rotation transmitting device
Granted: September 19, 2000
Patent Number:
6119553
A rotation transmitting device 1 introduces rotation into a vacuum side space 200 via a flexible meshing type gear drive 4 from an atmosphere side space 100. A first spacer 15 is disposed between ball bearings 13 and 14 of a rotation output shaft 5 positioned at the vacuum side, and a magnetic circuit is formed passing from the spacer 15 and through the ball bearing 13, a shaft portion 51 of the rotation output shaft 5 and the ball bearing 14. A magnetic fluid is filled as lubricant for…
Planetary gear device having a backlash adjusting mechanism
Granted: August 8, 2000
Patent Number:
6099432
A planetary gear device 1 comprises a rear-stage planetary gear mechanism 30 having carrier parts 38, 39 constituting a divided-type carrier, wherein axial holes 81-84 of planetary shafts 71-74 fixed on the carriers 38, 39 can be accessed directly from the side of an outer end surface 39c of the output-side carrier part 39, and the both carrier parts 38, 39 can be twisted by gripping these carrier parts by making use of the axial holes, whereby backlash adjustment can be carried out from…
Rigid internal gear of a wave gear drive
Granted: July 4, 2000
Patent Number:
6082222
A rigid internal gear of a wave gear drive is comprise by a tooth-formed member having inner teeth and a circular gear body member, these two members being integrally connected with each other. The tooth-formed member is made of ferrous or copper material having a high strength and wear resistance, while the gear body member is made of lightweight material such as aluminum alloy and the like. These members are connected integrally with each other in a manner that one of these members is…
Sealed-type wave gear device
Granted: May 23, 2000
Patent Number:
6065362
A sealed-type wave gear device 1 has a sealed space 13 formed by a device housing 2, first and second end plates 3 and 4 placed in openings at both the ends thereof, a hollow Input shaft 5, and first to fourth seals (8, 9, 11, 12) for sealing these members. A flat wave gear mechanism 20 is accommodated in the sealed space 13, which comprises a rigid internal gear 210, a silk-hat-shaped flexible external gear 220 inside the rigid internal gear 210, and a wave generator 230 fixed inside…
Photocell mounting apparatus for vertical blinds
Granted: May 16, 2000
Patent Number:
6062290
An automatic control apparatus for window coverings where the control apparatus is mounted in the space between a headrail and a window. The control apparatus is mounted to the rear surface of the headrail so as to overlie the rear surface of the headrail and is blocked from view by the headrail. A battery pack may be mounted to the control apparatus along the rear surface of the headrail and would also be blocked from view by the headrail.
Head rail-mounted actuator for window covering
Granted: May 9, 2000
Patent Number:
6060852
A mini-blind actuator has a motor and a housing that holds the motor and a dc battery. The rotor of the motor is coupled to the baton of the mini-blind for rotating the baton and thereby opening or closing the slats of the mini-blind. Alternatively, the rotor is coupled to the tilt rod of the blind to rotate the tilt rod and thereby open or close the slats of the mini-blind. A control signal generator generates a control signal for completing the electrical circuit between the battery…
Harmonic drive flexspline with integral flange support
Granted: April 18, 2000
Patent Number:
6050155
A harmonic drive transmission arrangement has an input member and an output member. The transmission comprises a generally cylindrically shaped housing including having a circular spline gear arranged therein, and a cup-shaped flexspline with an array of radially outwardly directed gear teeth on a first end thereof, engaged with the circular spline teeth. A wave generator is rotatably supported on the input member radially inwardly of the gear teeth on the flexspline, and an annular…
Piezo-electric drive arrangement for a harmonic drive transmission
Granted: February 29, 2000
Patent Number:
6029543
The invention relates to an apparatus and a method of rotatively empowering a harmonic drive transmission. The steps of the method include arranging a primary and a secondary cup-shaped flexspline co-axially within a rotatable rigid circular spline, and forming pivotable fingers in the secondary flexspline, biasing radially outwardly the pivotable fingers so as to contact and bias radially outwardly the primary flexspline in a sequential manner. The array of teeth between the primary…
Power assist device for steering apparatus
Granted: February 29, 2000
Patent Number:
6029768
In a power assist device 5, a hollow type electric motor 6 and a hollow-type wave drive gear 7 are concentrically arranged, and a steering shaft 2 is inserted into the center of these component parts. The rotational output of the hollow output shaft 61 of the electric motor 6 is input to a wave generator 74, and a rotational output of reduced speed is derived from a cup-shaped flexible external gear 73. This rotational output is transferred as a force assisting the steering shaft 2 in…
