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…
Harmonic drive bearing arrangement
Granted: February 22, 2000
Patent Number:
6026711
The present invention comprises a novel harmonic drive transmission arrangement having an input member and an output member, and its method of manufcature. The transmission comprises a generally cylindrically-shaped housing including 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…
Torque detecting device for a flexible meshing type gear
Granted: December 14, 1999
Patent Number:
6000289
An approximate straight line A1 of detected values showing magnetic impedance changes relative to a torque change obtained at an end portion (31a) of a body portion (31) of a cup-shaped flexible external gear (3) of a flexible meshing type gear inclines oppositely to an approximate straight line A2 of detected values showing magnetic impedance changes relative to a torque change obtained at a boundary portion (4) between a diaphragm (32) and a boss (33) of the flexible external gear.…
Housing for outdoor electrical equipment
Granted: November 23, 1999
Patent Number:
D416873
Lubricant supplying mechanism for a wave gear drive
Granted: November 16, 1999
Patent Number:
5984048
A wave gear drive (1) has a silk-hat shaped flexible external gear (12) comprising a cylindrical body (13), a circular diaphragm (14), a circular boss (15) formed integrally on the diaphragm (14), and external teeth (16) formed on the body (13) at a side of an open end (13a) thereof. The boss (13) of the flexible external gear, a cross roller bearing (7) and the rigid internal gear (11) are arranged between first and second end plates (2, 3) so as to define a substantially sealed inside…
Optical position sensor
Granted: October 26, 1999
Patent Number:
5973320
An optical position sensor comprises a linearity correction circuit 20 having ROM 22 in which a corresponding table between compensation values and respective rotational angular position of a rotational disk 51. The compensation values are obtained such that an actual relationship is measured between the rotational angular positions of the rotational disk 51 and the output B of a semiconductor position sensing device 54, deviation of the output B of the device 54 from a predetermined…
Optical encoder having a shade layer made from photosensitive material
Granted: September 21, 1999
Patent Number:
5955727
A shade layer 35 made from photosensitive material is formed on a surface of a rotational slit disk 3 of an optical encoder 1, and a slit pattern 36 is formed in the shade layer 35. This shade layer 35 is covered with and protected by a protective layer 39 made from such materials as acrylic resin. Accordingly, the slit pattern 36 can be prevented from being touched and damaged by other members. Further, the slit pattern can be prevented from being deteriorated by air. In addition, by…
Optical communications system with wavelength division multiplexing
Granted: August 17, 1999
Patent Number:
5940196
A wavelength division multiplexer (WDM) in an optical fiber transmission system launches analog signals, for instance a multi-channel television signal. The WDM enhances signal quality by transmitting along a single fiber two different optical wavelength signals, each carrying identical RF information. This results in a 3 dB improvement in carrier to noise ratio. The WDM combines two or more wavelengths centered around for instance 1550 nm or 1310 nm. A typical difference between the two…
Flexible meshing type gear device having a high wear-resisting rigid internal gear
Granted: August 10, 1999
Patent Number:
5934157
A flexible meshing type gear device 1 has an internal gear 2 having internal teeth 21, a flexible external gear 3 having external teeth 31, and a wave generator 4. Only the internal teeth 21 of the internal gear 2 are formed thereon with a metal plated coating 21a. Further, a tooth profile 211 of the internal teeth 21 of the rigid internal gear 2 before metal plating is modified from a desired tooth profile of the internal teeth so that a tooth profile 212 defined by a surface of the…
Flexible meshing type gear drive having specific sequences of actual teeth removed
Granted: August 3, 1999
Patent Number:
5931054
A flexible meshing type gear drive 1 has a rigid internal gear 2 and a flexible external gear 3 whose tooth profiles are defined as follows. First, initial tooth profiles of these gears 2, 3 are defined as in the case that the tooth number of the rigid internal gear is 102 and that of the flexible external gear is 100. The initial tooth profile is adopted as it is for that of the rigid internal gear 2. While, the actual tooth profile of the flexible external gear 3 is determined by…
Strain wave gearing having a non-interfering wide mesh range tooth profile
Granted: July 6, 1999
Patent Number:
5918508
A strain wave gearing is provided with tooth profiles formed taking into account tooth inclination and change in the movement locus of the origin of the tooth profile coordinates, thereby obtaining proper meshing over a wide range. Specifically, a tooth module is denoted as m; the number of teeth of the rigid internal gear as z.sub.C ; the number of teeth, the deddendum, the thickness of the tooth bottom rim and the radius of the neutral circle of the rim of the flexible external gear as…
Wave gear drive
Granted: May 25, 1999
Patent Number:
5906142
A wave gear drive (1) has first and second end plates (2) and (3) arranged to rotate relative with each other by means of a cross roller bearing (4) positioned between the plates (2, 3). An inner race (41) of the cross roller bearing (4) is formed integrally on a circumferential Inner surface with an internal gear (11). The inner race (41) is directly fastened to the first end plate (2), while an outer race (44) of the cross roller bearing (4) is fastened to the second end plate in a…
Head rail-mounted actuator for window coverings
Granted: May 25, 1999
Patent Number:
5907227
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…
Rotational power transmission device having planetary gears
Granted: April 13, 1999
Patent Number:
5893814
A rotational power transmission device 1 has a rotational input shaft 3, rotational input to which is transferred, via a sun gear 4 (the number of teeth is Za) and first planetary gears 5 (Zb), to second planetary gears 6 (Zc). The first and second planetary gears 5, 6 are mounted on a common planetary carrier 7. Planetary shafts 6a of the second planetary gears 6 also support third planetary gears 8 (Zd), and rotation of the second planetary gear 6 is transferred directly to the third…
Window covering with head rail-mounted actuator
Granted: March 16, 1999
Patent Number:
5883480
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…
