Patents Assigned to C.S.U. Ltd.
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Patent number: 5048982Abstract: This invention relates to a rotary structure adapted to be used as a spindle unit for a miniature motor or miniature rotor or as a tape guide roller for a VTR. In the structure of the rotary mechanism, instead of a conventional expensive radial ball bearing, a substantially V-shaped groove is formed on a shaft itself so as to hold balls provided between this groove and the tapered surface or concave spherical ball receiving surface of an outer race provided around the groove.Type: GrantFiled: October 11, 1990Date of Patent: September 17, 1991Assignee: C.S.U. Ltd.Inventor: Tsutomu Nakanishi
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Patent number: 4993851Abstract: A rotary structure adapted to be used as a spindle unit for a miniature motor or miniature rotor or as a tape guide roller for a VTR. In the structure of the rotary mechanism, instead of a conventional expensive radial ball bearings, a substantially V-shaped groove is formed in the shaft itself so as to hold balls between this groove and the tapered surface or concave spherical ball receiving surface of an outer race provided around the groove.Type: GrantFiled: June 26, 1990Date of Patent: February 19, 1991Assignee: C.S.U. Ltd.Inventor: Tsutomu Nakanishi
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Patent number: 4958943Abstract: This invention is to provide a ball bearing which has a performance close to that of the conventional radial ball bearing, is simple in the formation and is low in the cost for such bearing as for fitting the disc of a disc recording and reproducing device or the roller of the drawer of a desk or the like.Type: GrantFiled: January 5, 1989Date of Patent: September 25, 1990Assignee: C.S.U. LtdInventor: Tsutomu Nakanishi
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Patent number: 4958945Abstract: A spindle unit adapted to be used for miniature motors and miniature rotors.Type: GrantFiled: April 6, 1989Date of Patent: September 25, 1990Assignee: C.S.U. Ltd.Inventor: Tsutomu Nakanishi
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Patent number: 4939606Abstract: This invention relates to a rotary head assembly to be used for digital audio tape recorders (DAT) and the like. A magnetic tape can be made to run parallelly with a drum, the apparatus can be made small and light and the mechanism can be simplified.Type: GrantFiled: April 5, 1988Date of Patent: July 3, 1990Assignee: C.S.U. Ltd.Inventor: Tsutomu Nakanishi
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Patent number: 4934843Abstract: This invention relates to a rotary structure adapted to be used for a spindle unit of a miniature motor or miniature rotor or for a tape guide roller of a VTR or the like. In the structure of the rotary mechanism, instead of the conventional expensive radial ball bearings, recessed step parts are formed in the shaft itself and balls are held by and between the recessed step parts and ball receiving surfaces formed as tapered surfaces surfaces on outer races provided around the periphery of the shaft.Type: GrantFiled: July 10, 1989Date of Patent: June 19, 1990Assignee: C.S.U. LtdInventor: Tsutomu Nakanishi
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Patent number: 4909640Abstract: This invention is to provide a ball bearing which has a performance close to that of the conventional radial ball bearing, is simple in the formation and is low in the cost for such bearing as for fitting the disc of a disc recording and reproducing device or the roller of the drawer of a desk or the like.Type: GrantFiled: April 26, 1989Date of Patent: March 20, 1990Assignee: C.S.U. Ltd.Inventor: Tsutomu Nakanishi
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Patent number: 4883370Abstract: A rotary structure adapted to be used as a spindle unit for a miniature motor or miniature rotor or as a tape guide roller for a VTR. In the structure of the rotary mechanism, instead of a conventional expensive radial ball bearing, a groove of a semicircular cross-section is formed in a shaft itself so as to hold balls between this groove and the ball receiving concave surface of an outer race provided around the groove.Type: GrantFiled: January 27, 1987Date of Patent: November 28, 1989Assignee: C.S.U. Ltd.Inventor: Tsutomu Nakanishi