Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.

Patents

  1. Advanced Patent Search
Publication numberUS3372443 A
Publication typeGrant
Publication dateMar 12, 1968
Filing dateFeb 16, 1967
Priority dateFeb 16, 1967
Publication numberUS 3372443 A, US 3372443A, US-A-3372443, US3372443 A, US3372443A
InventorsDaddona Jr Domenic J
Original AssigneeScovill Manufacturing Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Magnetic fastening means
US 3372443 A
Abstract  available in
Images(1)
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

D. J. DADDONA, JR

MAGNETIC FASTENING MEANS March 12, 1968 Filed Feb. 16, 1967 United States Patent 3,372,443 MAGNETIC FASTENING MEANS Domenic J. Daddona, Jr., Waterbury, Coum, assiguor to Scovill Manufacturing Company, Waterbury, Conn., a corporation of Connecticut Filed Feb. 16, 1967, Ser. No. 616,559 Claims. (Cl. 24-201) ABSTRACT OF THE DISCLOSURE Improvements are provided in magnetic fasteners of the type used in the place of buttons on garments. The stud pin has a reduced diameter end which fits into a recess in the pin of the socket element, thus providing metal to metal lead-in surfaces and avoiding the inside beveled corner on the ceramic ferrite magnet. The socket pin extends through its magnet resulting in greater resistance to lateral stress and a more nearly continuous metal core for increased magnetic attraction of the fastener parts. The holder shells engage loosely around the magnets to eliminate breakage during assembly.

This invention relates to magnetic fastening means especially useful for garments to be worn by handicapped people. It is an improvement over the fastener disclosed in the pending application of John H. Humiston, S.N. 535,430, filed Mar. 18, 1966, now Patent No. 3,324,521. A still earlier form of magnetic button fasteners is shown in the patent to Brett, 3,141,216.

While the fasteners shown and described in the Humiston application have many desirable features, certain problems have been encountered in their manufacture and use. The annular magnets are made from powdered or granular ceramic ferrite material by a process of com pression molding and sintering and it is diflicult to obtain a good beveled inner corner around the hole in the magnet, which provided the lead-in surface for the stud pin into the socket. Any burr around such lead-in surface would tend to catch against the stud pin and interfere with putting the fastener elements together. Another problem encountered was breakage of the magnets when the holder shell was being clamped around the magnet and armature assembly.

In the fastener of the present invention the magnets have square inner corners, the pin of the socket element is extended to provide a metal lead-in surface around a central recess in the socket pin, and the stud pin has a projecting end portion of reduced diameter to fit into such recess. Also the holder shells are made to engage loosely around their magnets to prevent breakage while permitting adequate manufacture tolerances.

Other improved results will be hereinafter referred to, or will be apparent from the description of a specific embodiment of the invention shown in the accompanying drawings.

In these drawings:

FIG. 1 is a central vertical section, with parts shown in full, of the male and female fastener elements when separated; and

FIG. 2 is a central vertical section of the same elements fastened together.

The male and female fastener elements generally indicated by the numerals 5 and 6 respectively, are adapted for attachment to overlapping flaps of a garment or the like, by pronged rings (not shown) of the kind commonly used for attaching metal snap fasteners. Each female element has an annular magnet 7 of generally cylindrical shape with an axial hole 8. Against the outer end face 9 of the magnet is mounted an armature 10 of magnetic material such as soft iron or steel. Projecting axially from the disc-shaped base 11 of the armature into the hole 8 of the magnet, is a socket pin 12. This pin preferably extends substantially through the hole 8 to the inner face 13 of the magnet 7, and has a large open-ended recess 14 surrounded by a cylindrical wall 15. A lead-in surface 16 around the inside upper edge of the wall 15 provides what may be called a flared mouth at the free end of the socket pin so as better to guide into place the stud pin to be described.

A holder shell for the magnet and its armature has an inner wall 17 with an outer edge 18 turned inwardly to bear against the beveled surface 19 of the armature base 11 and an inner section 20 of the wall 17 is bent over the beveled outer corner 21 of the magnet. Preferably the inner curved section 20 of the wall 17 is not made to bear against the magnet tightly so that there is a certain amount of looseness to take care of reasonable tolerances without breakage of the magnet.

The construction involving the male fastener elements is generally the same as that which has already been described, and corresponding numerals are used where they apply. The stud pin 22 of the male element, however, is much longer than the pin 12 and projects through and beyond its magnet 7. It has a reduced diameter free end portion 23 to co-operate with the inclined lead-in surface 16 of the socket pin, so that when the parts are brought together with the opposed end surfaces 13 and 24 of the magnets of the female and male elements, respectively, somewhat close together, the stud pin will snap into place even though the elements are not in exact alignment. It will be understood that the magnets are so arranged that the ends which come into juxtaposition are of opposite polarities, as indicated by the letters N and S.

It will also be seen in FIG. 2 that the length of the pin 22 combined with the length of pin 12 to the bottom of recess 14 is greater than the combined axial dimension or length of the two magnets so that the end of pin 22 will abut the pin 12. There is left a clearance between the magnets in the closed position so as to insure the coming together of the pins 12 and 22. This is in the area of greatest magnetic fiux and produces the greatest holding power when the fastener elements are engaged. Also the cylindrical wall extending through the magnet of the female element and surrounding the end 23 of the stud pin provides a more nearly continuous core of magnetic material to allow better concentration of the magnetic flux. The pin 22 projecting into the recess provides metal to metal contact to resist transverse stresses.

Joined to the inner wall 17 of the holder shell by the U-bend at the outer edge 18, is the outer wall 25 which flares outwardly and curls over around its outer edge to form the proug retaining channel 26. The extent in the axial direction of both the inner and outer walls is substantially the same.

To attach each of the fastener elements to a garment flap a prong ring as commonly used in snap fasteners pierces through the garment material and has its prongs clinched in the channel 26.

What I claim is:

1. Magnetic fastening means with male and female fastener elements each of which has (a) a permanent magnet of generally cylindrical shape with an axial hole therethrough each having end surfaces of opposite polarity;

(b) an armature of magnetic material with a discshaped base bearing against an end face of the magnet;

(c) a holder shell engaging around the peripheries of said magnet and said base to hold them together;

(d) a stud pin on the armature of said male element projecting axially from the armature base through and a substantial distance beyond its magnet, said stud pin having a reduced diameter free end portion; and

(e) a socket pin on the armature of the female element projecting axially from the armature base and extending through at least the major portion of the hole in the magnet of the female element and having an open ended recess adapted to receive said reduced diameter free end portion of said stud pin when the fastener elements are brought together with the north pole end of one magnet facing the south pole end of the other magnet.

2. Magnetic fastening means as defined in claim 1 wherein said open ended recess has an outward flare at the free end of said socket pin to provide a lead-in surface for said stud pin.

3. Magnetic fastening means as defined in claim 2 the length of said socket pin is substantially the same as the axial length of the hole in the magnet of the female element.

References Cited UNITED STATES PATENTS 3,141,216 7/1964 Brett.

3,324,521 6/ 1968 Humiston.

FOREIGN PATENTS 1,111,697 3/1956 France.

BERNARD A. GELAK, Primary Examiner.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US3141216 *Nov 19, 1962Jul 21, 1964Haskell Elizabeth WMagnetic fastening means
US3324521 *Mar 18, 1966Jun 13, 1967Scovill Manufacturing CoMagnetic fastening means
FR1111697A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3919743 *Nov 5, 1973Nov 18, 1975Cutler Alvin HMagnetic fastener
US4021891 *Apr 18, 1974May 10, 1977Application Art Laboratories Co., Ltd.Magnetic lock closure
US4265002 *Aug 13, 1979May 5, 1981Hosken James CMagnetic fastening means
US4453294 *Mar 25, 1983Jun 12, 1984Tamao MoritaEngageable article using permanent magnet
US4455719 *May 11, 1983Jun 26, 1984Tamao MoritaStopper using a magnet
US4480361 *Dec 2, 1982Nov 6, 1984Tamao MoritaClasp utilizing attractive force of permanent magnet
US4941235 *May 2, 1989Jul 17, 1990Application Art Laboratories Co., Ltd.Magnetic lock closure device
US4991270 *Dec 29, 1988Feb 12, 1991Application Art Laboratories Co., Ltd.Magnetic lock closure
US5042116 *Aug 2, 1990Aug 27, 1991Metal Shearing S.N.C.Magnetic closing button for handbags and the like
US5251362 *Sep 11, 1992Oct 12, 1993Randolph-Rand CorporationMagnetic latch
US5400479 *Nov 6, 1992Mar 28, 1995Randolph-Rand CorporationMagnetic latch
US5448806 *Nov 6, 1992Sep 12, 1995Riceman; Robert G.Magnetic latch
US5545157 *May 2, 1995Aug 13, 1996Kimberly-Clark CorporationPanty shield
US5558662 *Apr 20, 1994Sep 24, 1996Kimberly-Clark CorporationAbsorbent article having an attachment mechanism and a method of attaching
US5611120 *Apr 14, 1995Mar 18, 1997International Patent Holdings Ltd.Magnetic latch
US5675874 *Jul 10, 1996Oct 14, 1997Chen; Chi-YuehMagnetic fastener
US5681304 *May 7, 1996Oct 28, 1997Kimberly Clark Worldwide, Inc.Absorbent article having an attachment mechanism and a method of attaching
US5690656 *Jun 27, 1995Nov 25, 1997Cook IncorporatedMethod and apparatus for creating abdominal visceral anastomoses
US5785698 *Dec 20, 1996Jul 28, 1998Kimberly-Clark CorporationPanty shield
US5920966 *Jan 31, 1997Jul 13, 1999Chen; Chi-YuehMagnetic fastener
US6606767 *Sep 28, 2001Aug 19, 2003Sheung Chung WongMagnetic strap fastener
US6622349 *Aug 2, 2001Sep 23, 2003Sheung Chung WongMagnetic strap fastener
US6656194 *Nov 5, 2002Dec 2, 2003Satiety, Inc.Magnetic anchoring devices
US6719768 *Aug 12, 2000Apr 13, 2004Ventrica, Inc.Magnetic components for use in forming anastomoses, creating ports in vessels and closing openings in tissue
US6836935 *Apr 23, 2003Jan 4, 2005Lodestone Fasteners, LlcAdjustable magnetic snap fastener
US7065841 *Feb 18, 2004Jun 27, 2006Clarisse SjoquistMagnetic fastener
US7089627Aug 21, 2001Aug 15, 2006L'oreal Usa, Inc.Magnetic hinge and device including magnetically-attracted plates
US7211094Oct 20, 2003May 1, 2007Satiety, Inc.Magnetic anchoring devices
US7220237Jan 24, 2003May 22, 2007Satiety, Inc.Method and device for use in endoscopic organ procedures
US7229428Oct 23, 2002Jun 12, 2007Satiety, Inc.Method and device for use in endoscopic organ procedures
US7232449Mar 12, 2003Jun 19, 2007Medtronic, Inc.Components, systems and methods for forming anastomoses using magnetism or other coupling means
US7246384 *Jan 7, 2005Jul 24, 2007William George BentzHeadgear and chin strap with magnetic fastener
US7288099Dec 5, 2002Oct 30, 2007Satiety, Inc.Obesity treatment tools and methods
US7306614Feb 28, 2006Dec 11, 2007Satiety, Inc.Overtube apparatus for insertion into a body
US7431727Feb 6, 2004Oct 7, 2008Medtronic, Inc.Magnetic components for use in forming anastomoses, creating ports in vessels and closing openings in tissue
US7467440Jul 6, 2005Dec 23, 2008L'oreal Usa, Inc.Virtual hinge
US7503922Mar 27, 2003Mar 17, 2009Satiety, Inc.Obesity treatment tools and methods
US7510559Dec 5, 2003Mar 31, 2009Satiety, Inc.Obesity treatment tools and methods
US7708684Feb 25, 2005May 4, 2010Satiety, Inc.Methods and devices for reducing hollow organ volume
US7753870Mar 25, 2005Jul 13, 2010Satiety, Inc.Systems and methods for treating obesity
US7753928Apr 14, 2005Jul 13, 2010Satiety, Inc.Method and device for use in minimally invasive placement of intragastric devices
US7757924Sep 28, 2006Jul 20, 2010Satiety, Inc.Single fold system for tissue approximation and fixation
US7789848Mar 5, 2007Sep 7, 2010Satiety, Inc.Method and device for use in endoscopic organ procedures
US7862574Jan 18, 2007Jan 4, 2011Satiety, Inc.Obesity treatment tools and methods
US7889036 *Mar 9, 2006Feb 15, 2011Joachim FiedlerMagnetic holding device
US7909837Sep 16, 2002Mar 22, 2011Medtronic, Inc.Methods, devices and systems for forming magnetic anastomoses
US7909838Jan 18, 2007Mar 22, 2011Satiety, Inc.Obesity treatment tools and methods
US7914543Apr 15, 2005Mar 29, 2011Satiety, Inc.Single fold device for tissue fixation
US7938841Sep 14, 2006May 10, 2011Medtronic, Inc.Components, systems and methods for forming anastomoses using magnetism or other coupling means
US7947055Mar 12, 2007May 24, 2011Ethicon Endo-Surgery, Inc.Methods and devices for maintaining a space occupying device in a relatively fixed location within a stomach
US8007505Aug 3, 2006Aug 30, 2011Ethicon Eado-Surgery, Inc.System for tissue approximation and fixation
US8009002 *Mar 15, 2010Aug 30, 2011Joachim FiedlerDetachable magnet holder
US8057384Feb 12, 2008Nov 15, 2011Ethicon Endo-Surgery, Inc.Methods and devices for reducing hollow organ volume
US8062207May 13, 2005Nov 22, 2011Ethicon Endo-Surgery, Inc.Intra-gastric fastening devices
US8075577Mar 12, 2007Dec 13, 2011Ethicon Endo-Surgery, Inc.Obesity treatment tools and methods
US8080022May 10, 2007Dec 20, 2011Ethicon Endo-Surgery, Inc.Obesity treatment tools and methods
US8080025May 10, 2007Dec 20, 2011Ethicon Endo-Surgery, Inc.Obesity treatment tools and methods
US8083756Jan 23, 2007Dec 27, 2011Ethicon Endo-Surgery, Inc.Methods and devices for maintaining a space occupying device in a relatively fixed location within a stomach
US8083757Mar 12, 2007Dec 27, 2011Ethicon Endo-Surgery, Inc.Methods and devices for maintaining a space occupying device in a relatively fixed location within a stomach
US8092378Dec 12, 2007Jan 10, 2012Ethicon Endo-Surgery, Inc.Remote tissue retraction device
US8123765Jun 4, 2007Feb 28, 2012Ethicon Endo-Surgery, Inc.Obesity treatment tools and methods
US8137366May 10, 2007Mar 20, 2012Ethicon Endo-Surgery, Inc.Obesity treatment tools and methods
US8137367May 10, 2007Mar 20, 2012Ethicon Endo-Surgery, Inc.Obesity treatment tools and methods
US8141562Dec 8, 2005Mar 27, 2012L'orčal S.A.Cosmetic container system including tab-hinged cover
US8142454 *Aug 11, 2008Mar 27, 2012The Regents Of The University Of California, San FranciscoApparatus and method for magnetic alteration of anatomical features
US8147441Mar 5, 2007Apr 3, 2012Ethicon Endo-Surgery, Inc.Method and device for use in endoscopic organ procedures
US8231641Jan 31, 2007Jul 31, 2012Ethicon Endo-Surgery, Inc.Method and devices for modifying the function of a body organ
US8252009Dec 29, 2005Aug 28, 2012Ethicon Endo-Surgery, Inc.Devices and methods for placement of partitions within a hollow body organ
US8257365May 2, 2007Sep 4, 2012Ethicon Endo-Surgery, Inc.Methods and devices for reducing hollow organ volume
US8357174Mar 16, 2011Jan 22, 2013Roth Alex TSingle fold device for tissue fixation
US8403838Dec 12, 2007Mar 26, 2013Ethicon Endo-Surgery, Inc.Remote tissue retraction device
US8403839Dec 12, 2007Mar 26, 2013Ethicon Endo-Surgery, Inc.Remote tissue retraction device
US8419755Feb 16, 2011Apr 16, 2013Ethicon Endo-Surgery, Inc.Obesity treatment tools and methods
US8449560Dec 29, 2006May 28, 2013Satiety, Inc.Devices and methods for placement of partitions within a hollow body organ
US8454503Nov 17, 2005Jun 4, 2013Ethicon Endo-Surgery, Inc.Remote tissue retraction device
US8518062Nov 18, 2002Aug 27, 2013Medtronic, Inc.Devices and methods for forming magnetic anastomoses between vessels
US8549671 *Jan 6, 2011Oct 8, 2013Bell Sports, Inc.Helmet having magnetically coupled cheek pads
US8590761Mar 9, 2007Nov 26, 2013Ethicon Endo-Surgery, Inc.Single fold system for tissue approximation and fixation
US8613749Dec 5, 2003Dec 24, 2013Ethicon Endo-Surgery, Inc.Obesity treatment tools and methods
US8623036 *Mar 15, 2013Jan 7, 2014The Regents Of The University Of CaliforniaMagnamosis
US8628547Mar 9, 2004Jan 14, 2014Ethicon Endo-Surgery, Inc.Devices and methods for placement of partitions within a hollow body organ
US8784306Dec 12, 2007Jul 22, 2014Ethicon Endo-Surgery, Inc.Remote tissue retraction device
US8794243Mar 19, 2013Aug 5, 2014Ethicon Endo-Surgery, Inc.Obesity treatment tools and methods
US8795166Dec 27, 2010Aug 5, 2014Ethicon Endo-Surgery, Inc.Remote tissue retraction device
US8801650Feb 17, 2012Aug 12, 2014Ethicon Endo-Surgery, Inc.Method and device for use in endoscopic organ procedures
US8828025Feb 11, 2005Sep 9, 2014Ethicon Endo-Surgery, Inc.Methods and devices for reducing hollow organ volume
US8939902Dec 15, 2011Jan 27, 2015Ethicon Endo-Surgery, Inc.Remote tissue retraction device
US9028511Mar 9, 2004May 12, 2015Ethicon Endo-Surgery, Inc.Devices and methods for placement of partitions within a hollow body organ
US9049894 *Jul 23, 2010Jun 9, 2015A.O. Magnetic Snap Mfy LimitedMagnetic fasteners
US20020153376 *Aug 21, 2001Oct 24, 2002David SeidlerVirtual hinge
US20040082963 *Oct 23, 2002Apr 29, 2004Jamy GannoeMethod and device for use in endoscopic organ procedures
US20040088008 *Oct 20, 2003May 6, 2004Satiety, Inc.Magnetic anchoring devices
US20040092974 *Jan 24, 2003May 13, 2004Jamy GannoeMethod and device for use in endoscopic organ procedures
US20040122453 *Dec 5, 2003Jun 24, 2004Satiety, Inc.Obesity treatment tools and methods
US20040215214 *Sep 16, 2002Oct 28, 2004Samuel CrewsMethods, devices and systems for forming magnetic anastomoses
US20050021059 *Feb 6, 2004Jan 27, 2005Cole David H.Magnetic components for use in forming anastomoses, creating ports in vessels and closing openings in tissue
US20050080439 *Aug 16, 2004Apr 14, 2005Carson Dean F.Devices and methods for forming magnetic anastomoses and ports in vessels
US20050101977 *Oct 28, 2004May 12, 2005Jamy GannoeMethod and device for use in endoscopic organ procedures
US20050177176 *Feb 5, 2004Aug 11, 2005Craig GerbiSingle-fold system for tissue approximation and fixation
US20050177985 *Feb 18, 2004Aug 18, 2005Clarisse SjoquistMagnetic fastener
US20050178631 *Feb 17, 2004Aug 18, 2005Tumi, Inc.Attachment to a carrying strap
US20050192599 *Feb 11, 2005Sep 1, 2005Demarais Denise M.Methods for reducing hollow organ volume
US20050192601 *Feb 25, 2005Sep 1, 2005Demarais Denise M.Methods and devices for reducing hollow organ volume
US20050192603 *Jan 19, 2005Sep 1, 2005Medtronic Avecor Cardiovascular, Inc. A Minnesota CorporationExtravascular anastomotic components and methods for forming magnetic anastomoses
US20050203547 *Mar 9, 2004Sep 15, 2005Gary WellerDevices and methods for placement of partitions within a hollow body organ
US20050203548 *Mar 9, 2004Sep 15, 2005Gary WellerDevices and methods for placement of partitions within a hollow body organ
US20050222592 *May 13, 2005Oct 6, 2005Jamy GannoeIntra-gastric fastening devices
US20050256533 *Apr 15, 2005Nov 17, 2005Roth Alex TSingle fold device for tissue fixation
US20050268433 *Jul 6, 2005Dec 8, 2005David SeidlerVirtual hinge
US20080114384 *Nov 9, 2007May 15, 2008Wilson-Cook Medical Inc.Ring magnets for surgical procedures
US20120117764 *Jul 23, 2010May 17, 2012A O Magnetic Snap Manufacturing Ltd.Magnetic fasteners
US20120174294 *Jul 12, 2012Bell Sports, Inc.Helmet having magnetically coupled cheek pads
US20120175030 *Jul 12, 2012Susan PaceInterchangeable handbag carry system
US20120216374 *Oct 25, 2010Aug 30, 2012Gerarld ManuelloMagnetic clasp device for clothing accessories
US20130253548 *Mar 15, 2013Sep 26, 2013The Regents Of The University Of CaliforniaMagnamosis
US20140189983 *Dec 11, 2013Jul 10, 2014Pcm Manufacturing, Inc.Golf Glove Magnetic Attachment Adaptor
EP0493075A1 *Dec 23, 1991Jul 1, 1992TARMO CO. Ltd.Magnetic fastener means
Classifications
U.S. Classification24/303, 335/302
International ClassificationA41F1/00
Cooperative ClassificationA41F1/002
European ClassificationA41F1/00B