Screwed connection, fastener for said connection and method for the production thereof

• US 6,669,424 B1
• Filed: 11/05/2001
• Issued: 12/30/2003
• Est. Priority Date: 05/05/1999
• Status: Expired due to Fees

• Current Assignee: Baier & Michels Gmbh & Co. Kg
• Original Assignee: Baier & Michels Gmbh & Co. Kg
• Inventors: Bauer, Roland
• Primary Examiner(s): WILSON, NEILL R
• Application Number:
  US09/959,705
• Time in Patent Office: 785 Days
• Field of Search: 411/171, 411/432, 411/433, 411/435, 411/290, 411/291, 411/310, 411/311, 470/25, 470/26
• US Class Current: 411/433
• CPC Class Codes: B21K 1/56 screw-threaded elements
• CPC Class Codes: F16B 37/12 with thread-engaging surfaces formed by inserted coil-springs, discs, or the like; Independent pieces of wound wire used as nuts; Threaded inserts for holes mounting devices B25B27/143
• CPC Class Codes: F16B 39/30 Locking exclusively by special shape of the screw-thread

Abstract

A screwed connection has a first connecting means with an external thread and a second connecting means with an internal thread. In order to avoid self-slackening of the screwed connection, the external thread has a denticulation (14-16) which interacts with a mating denticulation of the internal thread.

Claims

1. A method of incorporating an internal thread in a sheet-like material, comprising the steps of:

piercing the sheet-like material such that the material displaced by the piercing is arranged laterally in the form of a turned-out portion making the turned-out portion more uniform to form a collar, embossing a thread turn with the collar being deformed, bending over the sheet-like material in such a way that at least two openings at least partly overlap, and deforming the folded sheet-like material in such a way that the thread turns are arranged to form an internal thread.

2. The method as claimed in claim 1, comprising the further step of stamping a denticulation in the thread turn.

3. The method as claimed in claim 1, wherein the sheet-like material has supporting collars at its ends, the supporting collars having been produced by bending over the sheet-metal strip, connecting means which is adjacent to connecting means carrying the supporting collars being supported on one of the supporting collars.

4. The method as claimed in claim 1, wherein the folded sheet-like material, before being deformed, has an axis which passes through the openings and lies at an angle α

to a central axis of the deformed sheet-like material.

5. The method as claimed in claim 1, wherein the sheet-like material is deformed only to such an extent that there is a distance between an outer connecting means and an adjacent inner connecting means.