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THREADED FASTNERS WITH SERRATED THREADS

IP.com Disclosure Number: IPCOM000027032D
Original Publication Date: 1994-Dec-31
Included in the Prior Art Database: 2004-Apr-07
Document File: 4 page(s) / 102K

Publishing Venue

Xerox Disclosure Journal

Abstract

A threaded fastener with barbs on the crests of the threads is used to provide a self locking threaded fastener. The barbs have a triangular shape with a point central with the crest and in a leading position in the-fastening direction to provide for low torque fastening and high torque unfastening.

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This is the abbreviated version, containing approximately 59% of the total text.

Page 1 of 4

XEROX DISCLOSURE JOURNAL

THREADED FASTNERS WITH Proposed Classification SERRATED THREADS U.S. C1.411 Anthony I. Bradley Int. C1. F16b

24

J"

14 10

FIG. 1

XEROX DISCLOSURE JOURNAL - Vol. 19, No. 6 Novernber/December 1994 511

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THREADED FASTNERS WITH SERRATED THREADS (Cont'd)

FIG. 2

512 XEROX DISCLOSURE JOURNAL - Vol. 19, No. 6 NovembedDecember 1994

[This page contains 1 picture or other non-text object]

Page 3 of 4

THREADED FASTNERS WITH SERRATED THREADS (Cont'd)

A threaded fastener with barbs on the crests of the threads is used to provide a self locking threaded fastener. The barbs have a triangular shape with a point central with the crest and in a leading position in the-fastening direction to provide for low torque fastening and high torque unfastening.

Locking external fasteners are typically made by one of two methods. The first method is to secure a small area of nylon in a portion of the threads which nylon is deformed during threading. The second method is to provide serations on the under side of the head of the fastener which can provide locking with the mating surface.

Referring to Figure 1, a portion of the threads 10 of a threaded fastener 12 is shown. Barbs 14 are located on the crests 16 of the threads 10. The barbs 14
have a triangular shape formed by two sides 18 and a end 20. A point 22 is centrally located at the crests 16 between the two sides 18. When turning the threaded faste...