Patents by Inventor Masahiko Iwase
Masahiko Iwase 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: 10347224Abstract: A key in one aspect of the present disclosure comprises a key body, a hook, a weight, and a stopper. When the weight is accommodated in a hole of the key body, the weight is supported inside of the hole at least at the following two points: a point ? where the stopper is caught on the hook; and a point ? where the weight abuts on a wall surface of the hole, when the weight is rotated about the point ?.Type: GrantFiled: August 25, 2016Date of Patent: July 9, 2019Assignee: KAWAI MUSICAL INSTRUMENTS MANUFACTURING CO., LTDInventor: Masahiko Iwase
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Publication number: 20170061938Abstract: A key in one aspect of the present disclosure comprises a key body, a hook, a weight, and a stopper. When the weight is accommodated in a hole of the key body, the weight is supported inside of the hole at least at the following two points: a point a where the stopper is caught on the hook; and a point ? where the weight abuts on a wall surface of the hole, when the weight is rotated about the point ?.Type: ApplicationFiled: August 25, 2016Publication date: March 2, 2017Applicant: KAWAI MUSICAL INSTRUMENTS MANUFACTURING CO., LTD.Inventor: Masahiko IWASE
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Patent number: 9361861Abstract: A weight for a key of a keyboard musical instrument that is to be inserted and secured in an attachment space, provided to the key, is provided. The weight includes: a weight body portion; and a corrugated portion, disposed in at least one portion of a lateral surface of the weight body portion, the lateral surface being located around an axis extending in an inserting direction of the weight body portion into the attachment space, the corrugated portion including a plurality of corrugations aligned in the inserting direction. The weight body portion and the corrugated portion are made of an elastic material.Type: GrantFiled: December 12, 2014Date of Patent: June 7, 2016Inventor: Masahiko Iwase
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Publication number: 20150170619Abstract: A weight for a key of a keyboard musical instrument that is to be inserted and secured in an attachment space, provided to the key, is provided. The weight includes: a weight body portion; and a corrugated portion, disposed in at least one portion of a lateral surface of the weight body portion, the lateral surface being located around an axis extending in an inserting direction of the weight body portion into the attachment space, the corrugated portion including a plurality of corrugations aligned in the inserting direction. The weight body portion and the corrugated portion are made of an elastic material.Type: ApplicationFiled: December 12, 2014Publication date: June 18, 2015Applicant: KAWAI MUSICAL INSTRUMENTS MANUFACTURING CO., LTD.Inventor: Masahiko IWASE
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Patent number: 8921676Abstract: A key for a keyboard instrument, which makes it possible to easily attach a weight to a synthetic resin-made key body while securing a desired touch weight to be given during key depression, and can be manufactured at low costs. The key includes a pivotally movable key body made of a synthetic resin, extending in a front-rear direction, and having a recess open downward, and a weight made of a material whose main component has an elasticity, and attached to the key body in a state received in the recess. The recess has a locking portion formed at an opening edge portion in a manner projecting therefrom such that the locking portion allows the weight to be received into the recess while being elastically deformed when the weight is attached to the key body, and locks the received weight in a state prevented from falling out.Type: GrantFiled: March 17, 2014Date of Patent: December 30, 2014Assignee: Kabushiki Kaisha Kawai Gakki SeisakushoInventor: Masahiko Iwase
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Publication number: 20140290464Abstract: A key for a keyboard instrument, which makes it possible to easily attach a weight to a synthetic resin-made key body while securing a desired touch weight to be given during key depression, and can be manufactured at low costs. The key includes a pivotally movable key body made of a synthetic resin, extending in a front-rear direction, and having a recess open downward, and a weight made of a material whose main component has an elasticity, and attached to the key body in a state received in the recess. The recess has a locking portion formed at an opening edge portion in a manner projecting therefrom such that the locking portion allows the weight to be received into the recess while being elastically deformed when the weight is attached to the key body, and locks the received weight in a state prevented from falling out.Type: ApplicationFiled: March 17, 2014Publication date: October 2, 2014Applicant: KABUSHIKI KAISHA KAWAI GAKKI SEISAKUSHOInventor: Masahiko Iwase
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Patent number: 8748725Abstract: A key switch for an electronic piano, which makes it possible to increase an allowable range for shift of a movable contact without increasing the size of the key switch of the three-contact type. The key switch includes a substrate having first to third stationary contacts arranged thereon side by side in the lengthwise direction of a pivotal member as one of a key and a hammer. Each stationary contact has a common contact and a non-common contact. The common contact has an extended portion extending between two non-common contacts. The key switch has first to third movable contacts arranged side by side on an elastic switch body, for being sequentially brought into contact with the common contacts and non-common contacts of the stationary contacts as the switch body is pressed by the pivotal member, to thereby output signals indicative of key depression information.Type: GrantFiled: September 27, 2012Date of Patent: June 10, 2014Assignee: Kabushiki Kaisha Kawai Gakki SeisakushoInventors: Masahiko Iwase, Hideyuki Ishida
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Patent number: 6750389Abstract: When the performance by a piano part is automatically provided based on musical performance information so as to provide an ensemble performance with an automatic performance part by an electronic tone generator, a processing path for the automatic performance part on the side of the electronic tone generator includes a DSP to provided delayed output in the musical tone data so as to conform to a sound production timing of the piano part side.Type: GrantFiled: May 30, 2002Date of Patent: June 15, 2004Assignee: Kabushiki Kaisha Kawai Gakki SeisakushoInventors: Yutaka Hagiwara, Kenji Kamada, Masahiko Iwase, Hisamitsu Honda, Shinji Niitsuma, Toshinori Matsuda
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Publication number: 20020178898Abstract: When the performance by a piano part is automatically provided based on musical performance information so as to provide an ensemble performance with an automatic performance part by an electronic tone generator, a processing path for the automatic performance part on the side of the electronic tone generator includes a DSP to provided delayed output in the musical tone data so as to conform to a sound production timing of the piano part side.Type: ApplicationFiled: May 30, 2002Publication date: December 5, 2002Applicant: Kabushiki Kaisha Kawai Gakki SeisakushoInventors: Yutaka Hagiwara, Kenji Kamada, Masahiko Iwase, Hisamitsu Honda, Shinji Niitsuma, Toshinori Matsuda
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Patent number: 5580312Abstract: A damper disc assembly comprises an input rotation member, a flanged hub connectable to an output member, an elastic member elastically connecting the input rotation member and the hub flange, a plurality of friction members and an regulator. The plurality of friction members are sandwiched between the input rotation member and the hub flange and develop hysteresis torque when the input rotation member rotates relative to the hub. The regulator enables a select number friction members to be functional depending on whether the damper assembly responds to phases of twisting of the input rotation member relative to the hub flange in either a direction positive or negative with respect to the rotation of the input rotation member.Type: GrantFiled: June 7, 1994Date of Patent: December 3, 1996Assignee: Kabushiki Kaisha Daikin SeisakushoInventors: Hiroshi Takeuchi, Masahiko Iwase
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Patent number: 5190381Abstract: A release bearing assembly free from breakage and deformation, in which a force exerted from a release fork is not applied directly onto a sleeve. To this end, a cylindrical sleeve (7) guided by a guide (2) is not secured directly to a side plate (9) between an inner race (10) and the guide (2), as with a conventional structure. A cover (8) which has not hitherto been used, is used in the present invention. The cover (8) is secured to the side plate (9), and the cover (8) sandwiches the sleeve (7) in cooperation with a release bearing (6).Type: GrantFiled: January 14, 1992Date of Patent: March 2, 1993Assignee: Kabushiki Kaisha Daikin SeisakushoInventors: Tooru Hamada, Masahiko Iwase, Syogo Ohga
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Patent number: 5088583Abstract: A clutch disc assembly holding a diaphragm spring using a pair of wire rings clamped by bent tabs of a clutch cover or stud pins, and having a coned disc spring for controlling an increase in a releasing load due to wear of facings of a clutch. An annular coned disc spring urging an outer peripheral portion of the diaphragm spring to a side opposite to the clutch disc is disposed between a pressure plate and the diaphragm spring. An annular support plate is provided and its inner peripheral portion is held between the bent tabs of the clutch cover and the pair of wire rings. The coned disc spring is held by an outer peripheral portion of the support plate and the outer peripheral portion of the diaphragm spring in an elastically deflected condition.Type: GrantFiled: April 23, 1990Date of Patent: February 18, 1992Assignee: Kabushiki Kaisha Daikin SeisakushoInventors: Hiroshi Takeuchi, Masahiko Iwase, Hiromi Tojima, Ikuo Murata, Norihisa Uenohara