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Topura Co., Ltd. Patents |
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Assignee: Topura Co., Ltd.
Address: Osaka-ku, JP
No. of patents: 7
Patents:
| Patent Number |
Title Of Patent |
Date Issued |
| 6183809 |
Surface-treating method of screw parts |
February 6, 2001 |
| A surface-treating method of of screw parts, which method consists of coating beforehand a liquid organic resin based coating composition capable of forming a film having a volume resistivity of 10.sup.14 .OMEGA..multidot.cm or more at normal temperature onto a thread of screw parts |
| 6077013 |
Bolt equipped with pilot |
June 20, 2000 |
| A bolt provided with a pilot of the present invention is formed with a pilot portion, on the front end side of a shank portion, having an axis aligning with an axis of the shank portion. The pilot portion is formed with a guide thread portion continuous to the normal thread portion to |
| 5249882 |
Self-tapping screw |
October 5, 1993 |
| A shape of the head part of the screw is improved and performance of insertion of the screw when punched and performance of fastening of the screw when seated as well as a finishing treatment upon completion of the fastening against a fastened member are improved. The head part is co |
| 5205694 |
Self-tapping screw |
April 27, 1993 |
| By modifying a shape of a head part of a screw, an inserting performance when a punching operation is carried out, a fastening performance when the screw is seated, and a finishing process upon completion of fastening against a member to be fastened are improved.A seat surface of the hea |
| 5203657 |
Self-tapping screw |
April 20, 1993 |
| A shape of the head part of the screw is improved and performance of insertion of the screw when punched and performance of fastening of the screw when seated as well as a finishing treatment upon completion of the fastening against a fastened member are improved.The head part is made su |
| 4677703 |
Dies for forming drilling screws |
July 7, 1987 |
| Dies for manufacturing drilling screws and drill sections thereof comprise respectively a cavity formed by all flat faces, two straight longitudinal parallel side edges and two straight oblique front edges formed at the same height as the side edges on the top portion, a top flat elongat |
| 4637767 |
Threaded fastener |
January 20, 1987 |
| A thread fastener for fastening resilient material workpieces with small torque to obtain a strong fastening force, wherein the fastener is provided with equivalent height continuous thread convolutions on a shank and a plurality of spaced thread-type projections are petaliferously f |
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