Threaded – headed fastener – or washer making: process and apparat – Apparatus for making externally threaded fastener or... – Screw fastener making
Patent
1998-06-15
1999-05-18
Hail, III, Joseph J.
Threaded, headed fastener, or washer making: process and apparat
Apparatus for making externally threaded fastener or...
Screw fastener making
470 57, 72356, 72359, B21H3/02
Patent
active
059046236
ABSTRACT:
An apparatus for forming a slot in a semi-product of a bolt prior to thread formation includes a punch and a die mechanism. The die mechanism includes a tubular member, and an elongated die member formed integrally with a slot-forming plate which is located at a front end portion thereof and which has a uniform-thickness flat middle portion and two side portions that are wider than the middle portion. The semi-product can be compressed between the punch and the slot-forming plate of the die member in a central bore in a high-hardness block, which is fixed in the tubular member, to form the slot. Accordingly, the slot has a uniform-width middle portion and two end portions which are wider than the uniform-width middle portion. When threads are formed on the semi-product by means of a lathe, no projections are created in the uniform-width middle portion of the slot, thereby permitting a wedge-shaped end of a screwdriver to engage fittingly the uniform-width middle portion of the slot.
REFERENCES:
patent: 2996093 (1961-08-01), Moore
patent: 3188849 (1965-06-01), Wisebaker et al.
patent: 4485510 (1984-12-01), Hatter
patent: 4805437 (1989-02-01), Heil, Jr. et al.
patent: 4932234 (1990-06-01), Adachi
patent: 5667443 (1997-09-01), Allen
Hail III Joseph J.
Tolan Ed
LandOfFree
Apparatus for forming a slot in a semi-product of a bolt prior t does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus for forming a slot in a semi-product of a bolt prior t, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for forming a slot in a semi-product of a bolt prior t will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1756524