GB2036227A - Self-locking screw - Google Patents

Self-locking screw

Info

Publication number
GB2036227A
GB2036227A GB7921140A GB7921140A GB2036227A GB 2036227 A GB2036227 A GB 2036227A GB 7921140 A GB7921140 A GB 7921140A GB 7921140 A GB7921140 A GB 7921140A GB 2036227 A GB2036227 A GB 2036227A
Authority
GB
United Kingdom
Prior art keywords
screw thread
self
screw
locking screw
slit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB7921140A
Other versions
GB2036227B (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of GB2036227A publication Critical patent/GB2036227A/en
Application granted granted Critical
Publication of GB2036227B publication Critical patent/GB2036227B/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B39/00—Locking of screws, bolts or nuts
    • F16B39/22—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
    • F16B39/28—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by special members on, or shape of, the nut or bolt
    • F16B39/30—Locking exclusively by special shape of the screw-thread

Abstract

A self-locking screw is provided with a slit (4) radially cut along the top portion of the screw thread (2). The flank angle (3) of the screw thread (2) is less than the flank angle (8) of the screw thread (7) of a cooperating screw (6), so that the screw thread (2) is elastically deformed by engagement with the screw thread (7) along a direction making the slit (4) narrower. As a result, the side surfaces (2a) of the screw thread (2) are coherently pressed onto the side surfaces of the screw thread (7), causing a strong friction between them and providing for good anti-loosening ability.
GB7921140A 1977-11-04 1978-11-01 Self-locking screw Expired GB2036227B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13152777A JPS5465252A (en) 1977-11-04 1977-11-04 Lock nut* lock bolt and lock screw

Publications (2)

Publication Number Publication Date
GB2036227A true GB2036227A (en) 1980-06-25
GB2036227B GB2036227B (en) 1982-11-03

Family

ID=15060141

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7921140A Expired GB2036227B (en) 1977-11-04 1978-11-01 Self-locking screw

Country Status (9)

Country Link
JP (1) JPS5465252A (en)
AU (1) AU529857B2 (en)
CA (1) CA1126060A (en)
FR (1) FR2408061A1 (en)
GB (1) GB2036227B (en)
IT (1) IT1106649B (en)
NL (1) NL7810988A (en)
SE (1) SE7905818L (en)
WO (1) WO1979000280A1 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR900002192B1 (en) * 1985-11-22 1990-04-04 닛봉도꾸슈우기자이가부시끼가이샤 Screw with groove for self-lock and method and rolling flat die for manufacturing the same
DE4003892A1 (en) * 1990-02-09 1991-08-14 Haerle Anton SELF-LOCKING THREAD
US5052156A (en) * 1990-10-15 1991-10-01 501 Fukui Chemical Industry Co., Ltd. Flooring panel system
WO1999024191A1 (en) * 1997-11-10 1999-05-20 Hanstock Fasteners Pty Limited Improvements relating to screws and threadforms
UA66876C2 (en) * 1998-09-07 2004-06-15 Валлурек Маннесманн Ойл Енд Гес Франс Threaded joint of two metal pipes with a slot made in the threading
JP2003042130A (en) * 2001-08-01 2003-02-13 Taisuke Onuki Screw member
JP2003109711A (en) * 2001-09-28 2003-04-11 Maspro Denkoh Corp Connection terminal of high frequency equipment
US6688988B2 (en) 2002-06-04 2004-02-10 Balax, Inc. Looking thread cold forming tool
CN105485139A (en) * 2016-01-15 2016-04-13 瑞安市威孚标准件有限公司 Bolt with self-locking function
JP2017219076A (en) * 2016-06-06 2017-12-14 株式会社青山製作所 bolt

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US793824A (en) * 1904-12-15 1905-07-04 American Iron And Steel Mfg Co Inc Bolt and nut lock.
US3069961A (en) * 1960-01-04 1962-12-25 Elastic Stop Nut Corp Screw threaded member
US3523565A (en) * 1968-04-29 1970-08-11 Allied Prod Corp Self locking male threaded fastener
CA954430A (en) * 1970-04-03 1974-09-10 Dumont Aviation Associates Self-locking screw
US3882917A (en) * 1970-04-03 1975-05-13 Litton Industrial Products Self-locking thread
US3850215A (en) * 1971-11-22 1974-11-26 Litton Industrial Products Self-locking fasteners

Also Published As

Publication number Publication date
JPS5619492B2 (en) 1981-05-08
NL7810988A (en) 1979-05-08
IT1106649B (en) 1985-11-11
SE7905818L (en) 1979-07-03
WO1979000280A1 (en) 1979-05-31
FR2408061A1 (en) 1979-06-01
CA1126060A (en) 1982-06-22
JPS5465252A (en) 1979-05-25
AU4131778A (en) 1979-05-17
AU529857B2 (en) 1983-06-23
GB2036227B (en) 1982-11-03
IT7851762A0 (en) 1978-11-03

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee