Patents by Inventor Mitsuhiko Takenaka
Mitsuhiko Takenaka has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 6039651Abstract: A flywheel assembly 1 includes a flexible plate 3 and a flywheel 2. The flexible plate 3 has a rigidity in a rotation direction and flexibility in a bending direction, and is coupled at its radially inner portion to a crankshaft 100. An elastic plate body of the flexible plate 3 is provided at its inner periphery with a cylindrical support portion 16 projected away from the crankshaft 100. The flywheel 2 is fixed at its outer peripheral portion to an outer peripheral portion of the flexible plate 3. The flywheel 2 is provided at its inner periphery with a cylindrical portion 13 projected toward the flexible plate 3 and radially overlapping the cylindrical support portion 16.Type: GrantFiled: August 14, 1998Date of Patent: March 21, 2000Assignee: Exedy CorporationInventors: Hirotaka Fukushima, Mitsuhiko Takenaka
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Patent number: 5868624Abstract: A flywheel assembly 1 includes a flexible plate 3 and a flywheel 2. The flexible plate 3 has a rigidity in a rotation direction and flexibility in a bending direction, and is coupled at its radially inner portion to a crankshaft 100. An elastic plate body of the flexible plate 3 is provided at its inner periphery with a cylindrical support portion 16 projected away from the crankshaft 100. The flywheel 2 is fixed at its outer peripheral portion to an outer peripheral portion of the flexible plate 3. The flywheel 2 is provided at its inner periphery with a cylindrical portion 13 projected toward the flexible plate 3 and radially overlapping the cylindrical support portion 16.Type: GrantFiled: January 23, 1997Date of Patent: February 9, 1999Assignee: Exedy CorporationInventors: Hirotaka Fukushima, Mitsuhiko Takenaka
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Patent number: 5687618Abstract: A flywheel assembly comprises a first flywheel connectable to an engine, a second flywheel, and an inter-flywheel viscous damping mechanism, providing viscous damping through a fluid of flywheel torsional vibrations. The second flywheel is rotatably supported on the first flywheel and has a friction facing on which a friction material presses. The second flywheel includes an annular capturing channel provided radially inward of the friction facing for capturing fluid from leakage driven on the friction facing side by centrifugal force, and a plurality of through-holes, extending from the capturing channel to a space between the flywheels, for guiding fluid captured by the capturing channel to the space.Type: GrantFiled: December 27, 1995Date of Patent: November 18, 1997Assignee: Daikin Clutch CorporationInventors: Koji Kajitani, Hirotaka Fukushima, Mamoru Okubo, Naoki Yanagida, Mitsuhiko Takenaka, Mitsuo Touji, Kozo Yamamoto
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Patent number: 5511446Abstract: A flywheel assembly comprises a first flywheel connectable to an engine, a second flywheel, and an inter-flywheel viscous damping mechanism, providing viscous damping through a fluid of flywheel torsional vibrations. The second flywheel is rotatably supported on the first flywheel and has a friction facing on which a friction material presses. The second flywheel includes an annular capturing channel provided radially inward of the friction facing for capturing fluid from leakage driven on the friction facing side by centrifugal force, and a plurality of through-holes, extending from the capturing channel to a space between the flywheels, for guiding fluid captured by the capturing channel to the space.Type: GrantFiled: May 20, 1994Date of Patent: April 30, 1996Assignee: Kabushiki Kaisha Daikin SeisakushoInventors: Koji Kajitani, Hirotaka Fukushima, Manoru Okubo, Naoki Yanagida, Mitsuhiko Takenaka, Mitsuo Touji, Kozo Yamamoto
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Patent number: 5355747Abstract: A flywheel assembly comprises a first flywheel connectable an engine, a second flywheel, and an inter-flywheel viscous damping mechanism, providing viscous damping through a fluid of flywheel torsional vibrations. The second flywheel, is rotatably supported on the first flywheel and has a friction facing on which a friction material presses. The second flywheel includes an annular capturing channel provided rapidly inward of the friction facing for capturing fluid from leakage driven on the friction facing side by centrifugal force, and a plurality of through-holes, extending from the capturing channel to a space between the flywheels, for guiding fluid captured by the capturing channel to the space.Type: GrantFiled: September 1, 1992Date of Patent: October 18, 1994Assignee: Kabushiki Kaisha Daikin SeisakushoInventors: Koji Kajitani, Hirotaka Fukushima, Mamoru Okubo, Naoki Yanagida, Mitsuhiko Takenaka, Mitsuo Touji, Kozo Yamamoto
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Patent number: 5180044Abstract: A viscous liquid damper having a damper for developing a torsion torque in between an output-side driven plate (23) and an input-side drive plate (3), and a liquid chamber located between the drive plates (3) is partitioned into front and rear divided chamber (38 & 39) in rotation direction. In order to allow absorption of vibrations of different kinds without mutual confrontation in such a damper; an outward facing projection (41) is formed on the drive plate (3), a slider (40) is mated with the drive plate (3) in such a manner as slidable in the rotation direction, a main choke (A1) is formed between the slider (40) and the projection (41), stoppers (40a) able to mate with the projection (41) are formed on circumferential both ends of the slider (40), and a sub-choke (S2) connecting the both divided chambers (38 & 39) is formed separately from the main choke (S1).Type: GrantFiled: August 21, 1991Date of Patent: January 19, 1993Assignee: Kabushiki Kaisha Daikin SeisakushoInventors: Hirotaka Fukushima, Mitsuhiko Takenaka
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Patent number: 5088584Abstract: In a pull type clutch cover assembly, a disc-like annular conned disc spring 8 is installed in such a manner that an inner peripheral edge of the conned disc spring is moved together with the diaphragm spring 5 toward a pressure plate side in axial direction, when the clutch is engaged, so as to urge the diaphragm spring in an axial direction opposite to the pressure plate. Therefore, an excessive increase in a load of the diaphragm spring 5 can be controlled during operation of clutch.Type: GrantFiled: April 17, 1990Date of Patent: February 18, 1992Assignee: Kabushiki Kaisha Daiken SeisakushoInventors: Masakazu Inaba, Mitsuhiko Takenaka, Hiroshi Takeuchi
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Patent number: 4886153Abstract: A cooling mechanism for a clutch cover assembly having a diaphragm spring with radially extending tongues and slits between such tongues characterized by that on spaced of the tongues and adjacent to the clutch cover body are disposed vane members having vanes projecting at the slits of such spaced tongues for feeding cooling air into the slits and vane supports formed integrally with the vanes for fixing the vane members to the tongues. The air is discharged through ventilation ports in the clutch cover.Type: GrantFiled: April 6, 1988Date of Patent: December 12, 1989Assignee: Kabushiki Kaisha Daikin SeisakushoInventors: Mitsuhiko Takenaka, Mitsuo Higashiji
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Patent number: 4741424Abstract: A clutch disc equipped with an organic facing for light load and a cerametallic facing for heavy load which are arranged adjacently in a circumferential direction of a driven plate, characterized by that thickness of the cerametallic facing is made larger than that of the orgainc facing and at the same time a cushion is formed at a part on which the organic facing of said driven plate is lined.Type: GrantFiled: May 27, 1986Date of Patent: May 3, 1988Assignee: Kabushiki Kaisya Daikin SeisakusyoInventors: Seiichi Kitano, Mitsuhiko Takenaka