Patents Represented by Law Firm Hazel & Thomas
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Patent number: 6061279Abstract: A delay circuit is provided, which is capable of eliminating the influence of noise of low frequency as disturbance. A plurality of memory cells including a plurality of capacitors store an analog signal as an input signal by storing charge of the input signal in the capacitors. A first inverting device inverts the input signal to generate an inverted signal. A control circuit generates and delivers control signals to the memory cells to select the input signal and the inverted signal alternately and sequentially write the selected signals into the memory cells in a predetermined writing sequence. The control circuit further generates and delivers to the memory cells to sequentially read out the input signal and the inverted signal from the memory cells in a sequence corresponding to the predetermined writing sequence. A second inverting device inverts the read-out inverted signal. An output signal is synthesized from the read-out input signal and an output signal of the second inverting device.Type: GrantFiled: March 8, 1999Date of Patent: May 9, 2000Assignee: Yamaha CorporationInventors: Akihiro Toda, Masao Noro, Toshio Maejima
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Patent number: 6061648Abstract: In a speech coding apparatus, an input device inputs a mixed speech signal of a plurality of speakers. A separating device analyzes period characteristics of the input mixed speech signal, and separates the same signal into a plurality of single speech signals each associated with a corresponding one of the speakers, based on a result of the analysis. A first extracting device extracts source speech characteristic parameters included in each of the single speech signals. A second extracting device extracts a generic vocal-tract characteristic parameter from the input mixed speech signal. In a speech decoding apparatus, a first input device inputs the source speech characteristic parameters for each of the speakers. A second input device inputs the vocal-tract characteristic parameter.Type: GrantFiled: February 26, 1998Date of Patent: May 9, 2000Assignee: Yamaha CorporationInventor: Akitoshi Saito
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Patent number: 6052946Abstract: A window regulator apparatus for moving a window glass in the vertical direction of a vehicle door incorporates a plurality of pulleys rotatably supported on the vehicle door, a drum rotatably supported to the vehicle door, and a cable jointed to the window glass, guided to the pulleys and looped around the drum. The drum includes a first spiral groove which supports one end of the cable and a second spiral groove which supports the other end of the cable. The second spiral groove is formed to spiral in a direction opposite the first spiral groove. The extending points of the cable relative to the first spiral groove and the second spiral groove are defined to gradually change where the cable releases from the drum in the radial direction of the drum by the rotation of the drum.Type: GrantFiled: November 25, 1997Date of Patent: April 25, 2000Assignee: Aisin Seiki Kabushiki KaishaInventor: Yukio Isomura
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Patent number: 6053139Abstract: A valve timing control device incorporates a rotary shaft rotatably assembled within a cylinder head of an internal combustion engine, a rotational transmitting member mounted around the peripheral surface of the rotary shaft so as to rotate relative thereto within a predetermined range for transmitting a rotational power from a crank shaft, a vane provided on either one of the rotary shaft and the rotational transmitting member, a pressure chamber formed between the rotary shaft and the rotational transmitting member, and divided by the vane into an advance chamber and a delay chamber, a first fluid passage for supplying and discharging a fluid to and from the advance chamber, a second fluid passage for supplying and discharging a fluid to and from the delay chamber, a locking mechanism for holding the relationship between the rotary shaft and the rotational transmitting member at a middle position of the predetermined range, when the internal combustion engine starts, and a controlling mechanism for restricType: GrantFiled: April 26, 1999Date of Patent: April 25, 2000Assignee: Aisin Seiki Kabushiki KaishaInventors: Katzuhiko Eguchi, Kazumi Ogawa
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Patent number: 6054641Abstract: A keyboard musical instrument includes a keyboard, key action mechanisms and hammer assemblies as similar to an acoustic piano; however, strings are replaced with a beaten member so that a player practices a fingering on the keyboard without an acoustic sound; each of the hammer assemblies has a cylindrical hammer head formed of metal or synthetic rubber/synthetic resin, and no twisting moment is exerted on the hammer shank regardless of relative angular position between the hammer head and the hammer shank.Type: GrantFiled: October 22, 1996Date of Patent: April 25, 2000Assignee: Yamaha CorporationInventor: Satoshi Inoue
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Patent number: 6051807Abstract: A pulse arc welding apparatus feeds a consumable electrode with a constant rate, and arc-welds by applying a welding current constituted of a pulse current of a constant voltage characteristic and a base current of a constant current characteristic between the consumable electrode and a work piece. A pulse frequency correction circuit outputs a frequency correction value f.sub.e to a pulse frequency control circuit, such that when the pulse current upper limit value or lower limit value is selected continuously in a predetermined number of times at a pulse current comparison and adjustment circuit, pulse frequency is increased/decreased by a predetermined value .DELTA.-f by .DELTA.-f in accordance with the selected number of times.Type: GrantFiled: March 24, 1998Date of Patent: April 18, 2000Assignee: Kabushiki Kaisha Kobe Seiko ShoInventors: Takaaki Ogasawara, Masaru Tabata, Masahiro Homma, Eiji Sato
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Patent number: 6047986Abstract: An air bag inflator apparatus incorporating a lower canister and an upper canister forming a canister housing. The canister housing has a first wall, a second wall, a third wall, a fourth wall and a fifth wall. The first, second, third and fourth walls define a first space which accommodates an air bag, and the first, second, third, fourth and fifth walls define a second space which accommodates an inflator. A first flow control wall is continuously formed on the surface of the first wall, and a second flow control wall is continuously formed on the surface of the second wall. The first and second flow control walls control a flow of a gas from the inflator.Type: GrantFiled: August 27, 1997Date of Patent: April 11, 2000Assignee: Aisin Seiki Kabushiki KaishaInventors: Masanobu Ishikawa, Kazunori Sakamoto, Yoshiyuki Ito
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Patent number: 6039016Abstract: A valve timing control device incorporates a cam shaft rotatably assembled within a cylinder head of an engine, a rotational transmitting member mounted around the peripheral surface of the cam shaft so as to rotate relatively thereto within a predetermined range for transmitting rotational power from a crank pulley. A plurality of vanes are provided on the cam shaft or the rotational transmitting member. Fluid chambers are formed between the cam shaft and the rotational transmitting member and separated into advancing chambers and delaying chambers by the vanes. A fluid supplying device supplies fluid under pressure to at least a selected one of the advancing chambers and the delaying chambers. A coil-spring is disposed between the cam shaft and the rotational transmitting member so as to expand one of the advancing chambers and the delaying chambers. A restricting device is used to restrict the radial movement of the coil-spring.Type: GrantFiled: October 28, 1998Date of Patent: March 21, 2000Assignee: Aisin Seiki Kabushiki KaishaInventor: Yuji Noguchi
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Patent number: 6039015Abstract: A valve timing control device comprising a cam shaft rotatably assembled within an engine; a rotational transmitting member mounted around the peripheral surface of the cam shaft so as to rotate relative thereto within a predetermined range for transmitting a rotational power from a crank pulley; vanes provided on the cam shaft or the rotational transmitting member; fluid chambers formed between the cam shaft and the rotational transmitting member and separated into advancing chambers and delaying chambers by the vanes; a first fluid passage for feeding and discharging a fluid to and from the advancing chambers; a second fluid passage for feeding and discharging a fluid to and from the delaying chambers; a retracting bore formed in the rotational transmitting member and accommodating a locking pin and a spring to act on the locking pin; a plate supporting one end of the spring, the plate engaging with a groove which penetrates in the radial direction of the retracting bore; a receiving bore formed on the camType: GrantFiled: September 28, 1998Date of Patent: March 21, 2000Assignee: Aisin Seiki Kabushiki KaishaInventor: Atsushi Sato
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Patent number: 6035816Abstract: A valve timing control device for controlling the opening/closing timing of the intake valve or exhaust valve of an internal combustion engine is disclosed, comprising a valve opening/closing rotary shaft rotatably assembled with the cylinder head of the internal combustion engine; a rotation transmitting member mounted around the rotary shaft so as to rotate relative thereto within a predetermined range for transmitting a rotating power from a crank shaft; vanes provided on the rotary shaft or the rotation transmitting member; a fluid chamber formed between the rotary shaft and the rotation transmitting member and halved into advancing chambers and delaying chambers by the vanes; first fluid passages for feeding and discharging a fluid to and from the advancing chambers; second fluid passages for feeding and discharging the fluid to and from the delaying chambers; a refuge hole formed in the rotation transmitting member or the rotary shaft and accommodating therein a lock pin spring-biased toward the rotaryType: GrantFiled: June 5, 1998Date of Patent: March 14, 2000Assignee: Aisin Seiki Kabushiki KaishaInventors: Kazumi Ogawa, Kenji Fujiwaki
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Patent number: 6035819Abstract: A variable valve timing controller according to the present invention comprises a locking mechanism for holding the vane in the middle of the pressure chamber until the internal combustion engine starts; and a damper for sealing up one of the advance chamber and the delay chamber and for slowing the relative rotation between the rotational shaft and the rotation-transmitting member. According to the present invention, the locking mechanism maintains the vane in the middle of the pressure chamber until the internal combustion engine starts. Therefore, the vane cannot vibrate even when unstable transitional pressure is supplied to the pressure chamber so that no undesirable noise shall be generated. Further, the valve timing may be further delayed after the internal combustion engine starts since the vane is maintained in the middle of the pressure chamber.Type: GrantFiled: January 29, 1999Date of Patent: March 14, 2000Assignee: Aisin Seiki Kabushiki KaishaInventors: Hideki Nakayoshi, Katsuhiko Eguchi, Kongo Aoki
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Patent number: 6033149Abstract: A material and method is provided for lining man-entry sized pipes and securing the lining to the pipe. A plurality of lining panels (10) are positioned along the interior surface of a pipe so as to form a plurality of adjacent wall portions extending through the pipe. The lining panels are each formed with a plurality of T-shaped flanges (20) extending perpendicular to and along said outer wall of the lining panel. A stiffening panel (200) is positioned between at least selected pairs of the T-shaped flanges. The hollow interiors of the stiffening panels are formed to receive and hold grout. The grout when cured provides strength and support for a second layer of grout injected into an annulus between the pipe's inner surface and an outer surface of the lining.Type: GrantFiled: September 3, 1998Date of Patent: March 7, 2000Assignee: Danby of North AmericaInventor: George McAlpine
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Patent number: 6027318Abstract: A magnetically driven pump includes a pump chamber, an impeller held in the pump chamber so as to be rotatable about a central axis, a drive unit for rotatively driving the impeller, and a magnetic attraction system provided on the drive unit and impeller for rotating the impeller by mutual magnetic force. At least one of the first and second magnetic attraction devices is provided in parallel with the central axis and being provided also in front of and in back of the pump in the axial direction.Type: GrantFiled: September 23, 1996Date of Patent: February 22, 2000Assignees: Aisin Seiki Kabushiki Kaisha, Toyota Jidosha Kabushiki KaishaInventors: Shizuo Shimanuki, Norio Sasaki
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Patent number: 6024883Abstract: A disk for holding, centrifuging and microscopically viewing fluid samples is provided. The disk includes a plurality of reaction wells radiating outwardly and includes a barrier to restrain particles during centrifugation. This disk is used in the disclosed apparatus and method for blood typing and related procedures. The apparatus comprises sample loading, mixing, centrifuging, incubating, viewing and sterilizing stations. Additionally, a photomicrograph of the sample is taken, digitized, displayed, stored and printed along with corresponding test results and interpretation.Type: GrantFiled: May 17, 1996Date of Patent: February 15, 2000Assignee: ImmuTech, Inc.Inventor: Charles R. Jewell
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Patent number: 6024550Abstract: An oil pump of the type which includes a pump housing formed with an axial bore for support of an input shaft and a cylindrical recess the center of which is eccentrically displaced from the center of the axial bore, an inner rotor formed at its inner periphery with at least a pair of diametrically opposed radial projections for engagement with the input shaft disposed in the axial bore and at its outer periphery with a plurality of external teeth and being mounted on the input shaft within the pump housing for rotation therewith in a condition where opposite side faces of the inner rotor are slidable in contact with a pair of axially opposed internal side faces of the pump housing, and an outer rotor formed at its inner periphery with a plurality of internal teeth for engagement with the external teeth of the inner rotor and being coupled within the cylindrical recess of the pump housing, wherein the diametrically opposed radial projections of the inner rotor are integrally formed at their one ends with an aType: GrantFiled: August 29, 1997Date of Patent: February 15, 2000Assignee: Aisin Seiki Kabushiki KaishaInventors: Hisashi Miyazaki, Yoshinori Miura
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Patent number: 6021996Abstract: An electromagnetically operable proportional pressure control device has a spool which is slidably housed in a cylindrical bore formed in a housing. A pressure chamber defined in the cylindrical bore communicates with an inlet port through a diametrically reduced bore and an outlet port through a return hole, a pilot valve and a return passage. The pressure difference produced between the inlet port and the pressure chamber causes the spool to move establishing a direct fluid communication of both ports. An oil flow from the inlet port into the pressure chamber is smaller than an oil flow from the pressure chamber to the return passage.Type: GrantFiled: November 23, 1994Date of Patent: February 8, 2000Assignee: Aisin Seiki Kabushiki KaishaInventor: Hideki Nakayoshi
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Patent number: 6019817Abstract: A system for capturing HAPs/VOCs from an existing or planned air stream and destroying the contaminants in the air stream by microbial degradation is disclosed. In general, the system is composed of a reservoir with a filter structure positioned above it. The filter structure contains a capture or filtration media through which contaminated air or vapors must pass. HAPs/VOCs in the air or vapors are filtered out and absorbed by the capture media. The reservoir contains a tank water bath that is inoculated with microorganisms that are selected to degrade the hazardous materials or pollutants removed by the capture media. Sprinkler heads above the filter structure spray the filter structure with a sprayed water bath also inoculated with the microorganisms, whereby contaminants caught in the filter structure are leached out and bioremediated.Type: GrantFiled: February 25, 1998Date of Patent: February 1, 2000Assignee: Agri Microbe Sales, L.C.Inventor: Edward D. Seagle
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Patent number: D419574Type: GrantFiled: April 9, 1999Date of Patent: January 25, 2000Assignee: Conbis Pty Ltd.Inventor: Ronald Bower
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Patent number: D421861Type: GrantFiled: January 29, 1999Date of Patent: March 28, 2000Assignee: Global Upholstery CompanyInventor: Jonathan Ginat
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Patent number: D423087Type: GrantFiled: March 9, 1999Date of Patent: April 18, 2000Assignee: Deks Industries Pty Ltd.Inventor: David Houseman