Method for manufacturing injection hole member

Details Method for manufacturing injection hole member Method for manufacturing injection hole member

2011-03-22

2011-03-22

Bryant, David P (Department: 3726)

Metal working

Method of mechanical manufacture

Shaping one-piece blank by removing material

C239S533200, C239S533130, C029S890132

Reexamination Certificate

active

07908733

ABSTRACT:
A lead hole is formed in a base material of an injection hole member with a straight punch, and then, a taper hole is formed in the base material by widening the lead hole with a taper punch. An intersection line between a virtual plane perpendicular to a central axis of the lead hole and an inner peripheral surface of the lead hole is elliptic in shape, whose major axis is directed along an intersection line between a virtual plane, which includes the central axis of the lead hole and a thickness direction axis of the base material, and the virtual plane perpendicular to the central axis of the lead hole. An intersection line between a virtual plane perpendicular to a central axis of the taper punch and an outer peripheral surface of the taper punch is round in shape.

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JPO Examination Report (with English translation) dated Mar. 13, 2007.
Japanese Examination Report mailed Jul. 13, 2007 in Application No. 2003-385684 with English translation.
JPO Examination Report for JP2003-385684, counterpart of U.S. Appl. No. 10/746,262.
JPO Examination Report for JP2003-381687, counterpart of U.S. Appl. No. 10/746,262.

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