CA2123308A1 - Magnetic latch - Google Patents

Magnetic latch

Info

Publication number
CA2123308A1
CA2123308A1 CA002123308A CA2123308A CA2123308A1 CA 2123308 A1 CA2123308 A1 CA 2123308A1 CA 002123308 A CA002123308 A CA 002123308A CA 2123308 A CA2123308 A CA 2123308A CA 2123308 A1 CA2123308 A1 CA 2123308A1
Authority
CA
Canada
Prior art keywords
magnet
magnetic
solid non
attract
latch
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
CA002123308A
Other languages
French (fr)
Other versions
CA2123308C (en
Inventor
Robert G. Riceman
Mitchell A. Medina
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.)
International Patent Holdings Ltd
Original Assignee
Robert G. Riceman
Mitchell A. Medina
Randolph-Rand Corporation
Mitchell A. Medina
International Patent Holdings Ltd.
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
Priority claimed from US07/944,711 external-priority patent/US5251362A/en
Priority claimed from US07/971,609 external-priority patent/US5448806A/en
Priority claimed from US07/972,033 external-priority patent/US5400479A/en
Application filed by Robert G. Riceman, Mitchell A. Medina, Randolph-Rand Corporation, Mitchell A. Medina, International Patent Holdings Ltd. filed Critical Robert G. Riceman
Publication of CA2123308A1 publication Critical patent/CA2123308A1/en
Application granted granted Critical
Publication of CA2123308C publication Critical patent/CA2123308C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/02—Permanent magnets [PM]
    • H01F7/0231—Magnetic circuits with PM for power or force generation
    • H01F7/0252—PM holding devices
    • H01F7/0263—Closures, bags, bands, engagement devices with male and female parts

Abstract

A magnetic latch includes a first member (301) having a protrusion and a second member (305) engaging the protrusion prevent the first member (301) and the second member (305) from sliding relatively to one another. The second member includes a first magnet (230) to attract the first member (301) and a first solid non-magnetic member (319a) located inside a cavity of the first magnet (230) to enhance attraction between the first member (301) and the second member (305), The second member (305) can be provided with a backing plate (315a) to facilitate a magnetic flux path from the magnet to the magnet aperture. The second member (305) can also include a second magent to attract the first member (301) and a second solid non-magnetic member locat-ed between the first magnet (230) and the second magnet. A third solid non-magnetic member can be provided on the outer peri-phery of the magnets. This design provides a latch with stronger holding power,
CA002123308A 1992-09-11 1992-12-04 Magnetic latch Expired - Fee Related CA2123308C (en)

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
US07/944,711 US5251362A (en) 1991-05-24 1992-09-11 Magnetic latch
US07/944,711 1992-09-11
US07/971,609 US5448806A (en) 1991-05-24 1992-11-06 Magnetic latch
US07/972,033 1992-11-06
US07/971,609 1992-11-06
US07/972,033 US5400479A (en) 1991-05-24 1992-11-06 Magnetic latch
PCT/US1992/010446 WO1994006319A1 (en) 1992-09-11 1992-12-04 Magnetic latch

Publications (2)

Publication Number Publication Date
CA2123308A1 true CA2123308A1 (en) 1994-03-31
CA2123308C CA2123308C (en) 2003-03-25

Family

ID=27420711

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002123308A Expired - Fee Related CA2123308C (en) 1992-09-11 1992-12-04 Magnetic latch

Country Status (6)

Country Link
EP (1) EP0615414B1 (en)
AT (1) ATE180636T1 (en)
CA (1) CA2123308C (en)
DE (1) DE69229352T2 (en)
ES (1) ES2136121T3 (en)
WO (1) WO1994006319A1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2307107B (en) * 1995-11-08 2000-04-12 Nokia Mobile Phones Ltd A radio device
DE69532502T2 (en) * 1995-11-08 2004-11-04 Nokia Corp. Radio transceiver
DE29606994U1 (en) * 1996-04-21 1997-08-14 Schneider W Dictator Tech Holding magnet
IT1283151B1 (en) * 1996-07-12 1998-04-07 Minu Spa MAGNETIC CLOSURE WITH COVERING IN NON-FERROMAGNETIC MATERIAL, FOR BAGS, CLOTHING AND SIMILAR ITEMS.
DE29618217U1 (en) * 1996-10-21 1996-12-19 Brugger Gmbh Holding magnet
USD805882S1 (en) * 2014-01-02 2017-12-26 Jason Eric Berry Magnetic fastener
US11952826B2 (en) 2022-08-29 2024-04-09 Cortex, LLC Magnetic closure bumpers
US20240068281A1 (en) * 2022-08-29 2024-02-29 Cortex, LLC Magnetic Door Stop and Door Holder

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58105508A (en) * 1981-12-18 1983-06-23 Taamo:Kk Engaging device
JPS58121610A (en) * 1982-10-05 1983-07-20 Taamo:Kk Connector
JPS59111306A (en) * 1982-12-17 1984-06-27 Taamo:Kk Engaging fitting
JPS61141101A (en) * 1984-12-14 1986-06-28 Taamo:Kk Stud using permanent magnet
US4754532A (en) * 1987-02-24 1988-07-05 Thomson Richard E Adjustable quick release magnetic holding assembly

Also Published As

Publication number Publication date
CA2123308C (en) 2003-03-25
EP0615414A1 (en) 1994-09-21
DE69229352T2 (en) 2000-02-03
ES2136121T3 (en) 1999-11-16
WO1994006319A1 (en) 1994-03-31
DE69229352D1 (en) 1999-07-08
EP0615414A4 (en) 1995-03-08
ATE180636T1 (en) 1999-06-15
EP0615414B1 (en) 1999-06-02

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed