TAPER PIECE, THREAD FASTENING CONSTRUCTION USING TAPER PIECE WITH FEMALE THREAD, FORMED DRILL FOR PROCESSING INSERTION HOLE FOR TAPER PIECE, AND HAMMER FOR DRIVING OF TAPER PIECE

WIPO Patent Application WO/1999/010659

A1

A taper piece having a good operability, a thread fastening construction using a taper piece with a female thread, a formed drill for processing an insertion hole for the taper piece, and a hammer for driving of the taper top. A taper piece (1) of the invention comprises a tapered portion (101), an external surface of which is frustum-shaped, a flange portion (102) formed on the terminal end of an enlarged side of the tapered portion (101) to extend beyond the tapered portion (101) and having a flat surface perpendicular to an axial direction of the tapered portion (101), and a female thread (104) constituting an extension extending in the axial direction of the tapered portion (101). The taper piece (1) is driven into a hole (3), of which a hole tapered portion (301) and a hole stepped portion (302) are worked at a time, to make a member being clamped in a thread fastening construction.

JP2024043879	Drill for glass fiber reinforced board
JP4349384	Microfabrication tools and methods for microfabrication of brittle materials

NINOMIYA CHIKAKAZU
SHIOKAWA TAKEJI
IMAI KUNINORI
MIYAMOTO MITSUO
MIKAWA MITSUYA

PCT/JP1997/002979

March 04, 1999

August 27, 1997

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HITACHI LTD (JP)

B23B51/00; B25D9/08; B21J13/00; B65G1/00; F16B5/02; F16B37/04; F16B37/12; (IPC1-7): F16B37/04

JPS57153813U	1982-09-27
JPS62125897U	1987-08-10
JPS6345412U	1988-03-26
JPS6448636A	1989-02-23
JPS4986974A	1974-08-20
JPS541904A	1979-01-09
JPS5148872A	1976-04-27

See also references of EP 1008771A4

Ogawa, Katsuo (5-1, Marunouchi 1-chom, Chiyoda-ku Tokyo 100, JP)

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