EP4133963A1 - Fermeture à anneau élastique et fabrication d'une fermeture à anneau élastique - Google Patents

Fermeture à anneau élastique et fabrication d'une fermeture à anneau élastique Download PDF

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Publication number
EP4133963A1
EP4133963A1 EP21191339.7A EP21191339A EP4133963A1 EP 4133963 A1 EP4133963 A1 EP 4133963A1 EP 21191339 A EP21191339 A EP 21191339A EP 4133963 A1 EP4133963 A1 EP 4133963A1
Authority
EP
European Patent Office
Prior art keywords
spring
inner tube
ring closure
spring ring
outer tube
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
EP21191339.7A
Other languages
German (de)
English (en)
Other versions
EP4133963B1 (fr
Inventor
Rainer Götze
Philip Götze
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.)
Goetze & Goetze Ltd
Original Assignee
Goetze & Goetze 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
Application filed by Goetze & Goetze Ltd filed Critical Goetze & Goetze Ltd
Priority to EP21191339.7A priority Critical patent/EP4133963B1/fr
Priority to US17/884,647 priority patent/US11950664B2/en
Publication of EP4133963A1 publication Critical patent/EP4133963A1/fr
Application granted granted Critical
Publication of EP4133963B1 publication Critical patent/EP4133963B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44C—PERSONAL ADORNMENTS, e.g. JEWELLERY; COINS
    • A44C5/00—Bracelets; Wrist-watch straps; Fastenings for bracelets or wrist-watch straps
    • A44C5/18—Fasteners for straps, chains or the like
    • A44C5/20—Fasteners for straps, chains or the like for open straps, chains or the like
    • A44C5/2009—Fasteners for straps, chains or the like for open straps, chains or the like of the ring type
    • A44C5/2014—Fasteners for straps, chains or the like for open straps, chains or the like of the ring type of the spring ring type
    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
    • A44B15/00—Key-rings
    • A44B15/007—Openers

Definitions

  • the invention relates to a spring ring closure having a closed state, in which the spring ring closure forms a closed ring, and an open state, in which the ring is opened, having an outer tube and a spring.
  • Spring ring clasps of this type are known from practice and are used to clasp key rings or pieces of jewelery such as chains or the like.
  • spring ring closures in which the spring is arranged in a cavity formed by the outer tube.
  • spring ring closures usually have a pin for guiding the spring. This pin protrudes into the cavity of the spring ring closure through an opening in the outer tube, as a result of which dirt particles can penetrate into the cavity.
  • the production of such a spring ring closure also requires a large number of steps, tools and dexterity and is therefore complex.
  • the outwardly visible portion of the pin detracts from the aesthetics of a spring ring clasp, particularly on a piece of jewelry.
  • the invention further relates to the manufacture of a spring ring closure.
  • the features of claim 1 are provided according to the invention.
  • the spring ring closure has an inner tube which protrudes into the outer tube in an overlapping area, and that the spring is arranged in a cavity formed by the outer and inner tubes, the outer tube for opening the spring ring closure against a spring force caused by the spring relative to the Inner tube is displaceable and wherein the spring protrudes at least in the closed state from the inner tube and protrudes into the outer tube.
  • the overlapping area In the open state, the overlapping area is larger than in the closed state. When opening the spring ring closure, the overlapping area is therefore increased.
  • the outer tube can be optimally used to open the spring ring closure.
  • a spring ring closure designed according to the invention also has the advantage that the entire closure mechanism can be invisible, which offers more freedom for the aesthetic design of the spring ring closure. It is sufficient to move the outer tube relative to the inner tube to open and close the spring ring closure. Since the spring is arranged in a cavity formed by the inner and outer tubes, it can easily be made invisible to the user, depending on the specific design of the inner and outer tubes.
  • the spring which protrudes from the inner tube at least in the closed state, improves the spring ring closure, for example, because the spring can be easily placed in the inner tube during assembly and/or repair work. It is the case that the slack spring usually does not protrude from the inner tube when the ring is assembled, since the spring is short for assembly reasons is trained. In the case of previously known closures, the spring is inserted into the ring during assembly and extends as far as a slot in the ring. Now the pin is guided into the slot and against the end of the spring located at the slot under force, which requires a great deal of manual dexterity.
  • the assembly of a spring ring closure designed according to the invention is significantly simpler, since the outer tube can be pushed over the inner tube and the spring is thus automatically tensioned. This simplifies assembly and repairs.
  • the protrusion of the spring from the inner tube means that the spring is longer than when the spring does not protrude from the inner tube.
  • the resulting increased spring deflection results in a less hard locking mechanism and thus improves the locking mechanism.
  • the longer spring deflection also has the advantage that there is greater design freedom for the shape of the ring, since the spring can adapt flexibly to the shape.
  • a long spring can be used in oval spring ring closures.
  • the guidance of the spring ring closure through the overlapping area can be designed to be very robust and advantageous.
  • the spring is preferably designed as a spiral spring.
  • the inner diameter of the outer tube in the overlapping area is preferably matched to the outer diameter of the inner tube in such a way that there is only minimal play between the outer tube and the inner tube.
  • the spring ring closure can be closed and locked easily while saving material be designed to be openable.
  • the outer tube and the inner tube are preferably designed in the form of a segment of a circle, it being possible for the outer tube to be shorter than the inner tube.
  • a short outer tube can thus advantageously save material. This reduction in material can also be beneficial for the aesthetics, since the spring ring clasp appears uniform on the outside.
  • the spring ring closure has a closed state in which the spring ring closure forms a closed ring.
  • the ring may be circular, oval or generally round, in which context round means that the ring has no edges.
  • the ring can also have edges and, for example, have a polyline with and without rounded sections.
  • the spring preferably projects out of the inner tube and into the outer tube between the open, preferably completely open, and the closed state. Particularly preferably, the spring does not protrude from the inner tube only in the fully open state. Here the spring can be flush with an outer end of the inner tube.
  • the inner and the outer tube each form free ends in the open state, which touch in the closed state.
  • Free ends can be the end sections of the inner and outer tube, which in the open state are designed to be free-standing and preferably open in space.
  • the spring ring closure can be stabilized in its closed state.
  • the free ends can be adapted to one another, so that the adjustment of the inner tube to the outer tube can be more precise.
  • a stop is formed on or in the outer tube and/or in the inner tube.
  • the stop can in particular serve as a stopper and prevent the spring ring closure from being moved beyond a desired level when the spring is closed when the spring is pretensioned. Furthermore, the entry of dirt particles into the cavity can be reduced by means of the stop.
  • a stop can be designed as a plate, eyelet or preferably as a ring.
  • the stop can in particular be soldered to the inner or outer tube or in it, or it can be designed as a molding of one of the aforementioned tubes.
  • the stopper can be stably attached to or in the inner or outer tube.
  • the outer and the inner tube can be made of a metal, such as a noble metal in particular.
  • the material should have a high level of rigidity and dimensional stability, but should also be bendable, since bendability can simplify the manufacture of the spring ring closure.
  • the outer and/or inner tube can also be flexible and/or not very dimensionally stable.
  • the stops can touch each other in the closed state.
  • the stops can fit exactly are aligned with one another, as a result of which the spring ring closure can be closed in a stable manner, in particular when a second overlapping region has been formed, and the closed state can be maintained.
  • a spring stop is formed in the outer tube, which is touched by the spring in the open and in the closed state.
  • a spring stop is formed in the inner tube, which is touched by the spring in the open and in the closed state.
  • the spring can thus advantageously be pressed onto the spring stops for pretensioning. It is also advantageous, particularly if the inner and outer tubes have a spring stop, that the spring can be guided through the spring stops inside the inner tube without the spring jumping out at the free end of the inner tube.
  • the spring stops can also be soldered to or in the inner or outer tube or formed as a molding of one of the two tubes.
  • the production of the inner or outer tube and thus the production of the spring ring closure can be optimized since, for example, the attachment of spring stops can be carried out at the same time as the stops are attached.
  • Spring stop and stop are particularly preferably identical, which saves even more costs, time and weight and can thus improve the production of the spring ring closure and its properties. In addition, it can be achieved in this way that the available spring travel is increased.
  • the outer tube is open at its free end.
  • the inner tube is open at its free end.
  • the openings allow liquid exchange so that no liquid can collect in the cavity, which would attack the material of the spring ring closure.
  • the openings can therefore improve the durability of the spring ring fastener.
  • the openings also allow interesting design variants such as the creation of creoles.
  • one or the stop formed in the outer pipe has an opening so that it does not completely close the outer pipe, and/or wherein one or the stop formed in the inner pipe has an opening so that it does not completely close the inner pipe .
  • the spring is arranged in the cavity. This reduces the number of components and increases the available suspension travel.
  • the spring can have little or no possibility of movement within the cavity, as a result of which abrasion of the spring on an inside of the inner or outer tube can be reduced, as a result of which the spring ring closure can be designed to be more durable.
  • the spring ring closure consists of the outer tube, the inner tube and the spring.
  • a spring ring closure can thus be manufactured from only three components, with the inner and outer tube being able to have stops and/or spring stops, as described above.
  • the outer and/or the inner tube can also have fastening elements or closure aids, for example.
  • the spring ring closure can therefore be made extremely easy because, for example a stamp or the like is dispensed with. Once assembled, the spring ring closure can already form an aesthetic ring, preferably without any further external closure components. Such a spring ring closure can be manufactured inexpensively with minimal effort, which is an advantage.
  • the spring is completely covered by the tube arrangement formed by the inner tube and the outer tube in the open and in the closed state.
  • the locking mechanism can thus be completely invisible, which allows for aesthetically pleasing designs. Furthermore, this can prevent dirt particles or moisture from impairing or influencing the function of the spring legs. Since the spring is completely covered by the tube arrangement formed by the inner tube and the outer tube in the open state as well as in the closed state, the spring cannot get caught in any openings during prestressing, which is advantageous.
  • a handle element can simplify the opening and closing of the spring ring closure, particularly in the case of spring ring closures with a small diameter. It can be advantageous for aesthetics and/or production if the at least one gripping element can be attached to an outside of the outer tube and/or inner tube.
  • the invention also allows configurations in which the outer and inner tubes, in particular the entire spring ring closure, are free of handle elements, in particular free of attached handle elements and free of Indentations and free from other elements.
  • Such configurations enable particularly aesthetic shapes and are free of parts that could cause injury or that could be particularly mechanically stressed.
  • the outer tube and/or the inner tube are completely closed on their lateral surface.
  • a jacket surface can be manufactured to be completely closed without any joints or slots, as a result of which the rigidity of the outer tube and/or the inner tube can be increased. Increased rigidity can prevent twisting and thus unintentional opening of the spring ring closure.
  • a section of the spring that projects out of the inner tube in the closed state is wound more tightly than a section of the spring that is in the inner tube in the closed state. It is advantageous here that when the spring ring closure is opened, ie when the outer tube is pulled back, with the spring being compressed in the direction of the free end of the inner tube, the tight winding of the spring can prevent the spring from getting caught on the inner tube.
  • At least one fastening element for fastening the spring ring clasp to a piece of jewelery is formed on the inner tube and/or the outer tube.
  • the fastening element can be designed, for example, as an eyelet.
  • a piece of jewelery can be a chain, a pendant or a clasp, for example.
  • the spring ring clasp can be connected to a piece of jewelery or a ring holder that is not designed as a piece of jewelery by the fastening element, the spring ring clasp can be used in many ways.
  • the spring ring clasp is designed for hanging a piece of jewelry.
  • the spring ring closure has a diameter of less than 10 mm, preferably less than 6 mm.
  • a spring ring clasp with a diameter of less than 10 mm, preferably less than 6 mm, is particularly advantageous in the jewelry industry, since the aesthetics of a piece of jewelry can be improved because the spring ring clasp can be kept small.
  • the advantages of the proposed solution according to the invention are particularly important with such small spring ring closures, since the spring and the inner tube can determine the guidance of the closure mechanism and no other disruptive components are required for this.
  • a spring ring closure can also have a diameter greater than 10 mm.
  • a pin is formed at the free end of the outer tube, which protrudes into the inner tube in the closed state.
  • the pin preferably protrudes through an opening of a stop and/or spring stop formed on or in the inner tube and/or through a section of the spring.
  • a pin is formed at the free end of the inner tube, which protrudes into the outer tube in the closed state, in particular through an opening on or in the outer tube trained stop and / or spring stop and / or by a section of the spring.
  • the stops, spring stops and their openings are preferably those already mentioned above.
  • Such configurations allow the spring ring closure to be closed in an even more stable manner, since the pin protrudes into the inner tube and accidental slipping is further reduced.
  • a stable and aesthetic spring ring clasp can be used directly as a piece of jewelry, for example as a bracelet and especially as a creole. Such a use can be particularly advantageous since, for example, a creole does not have to be bent or stressed as is usually the case when putting it on or taking it off.
  • the spring ring clasp has important applications in the jewelry industry. However, this can also be interesting for other applications.
  • the features of the independent claim directed to the production of a spring ring closure are provided according to the invention.
  • the spring is inserted into the axially bent inner tube, then the outer tube so far is pushed over the inner tube, that in the circumferential direction of the ring a free space is formed between free ends of the outer and inner tubes, and that the inner tube is then straightened.
  • a spring ring closure according to the invention can thus be produced inexpensively and quickly.
  • the outer tube or the inner tube can be made from a precious metal, in particular gold and/or silver, and/or from a base metal, in particular stainless steel, or from other materials which are preferably used in the jewelry industry.
  • the outer tube which may be manufacturable by spiral welding, could be straightened after being cut from a spiral so that if the outer tube were to be laid down, it would lie flat on a level surface throughout.
  • the inner tube would not be straightened after disconnection from the spiral, thereby preserving the winding pitch of the spiral.
  • the spring would then be inserted into the inner tube up to the spring stop.
  • the spring protrudes from the inner tube, specifically with a length that is greater than the path of the outer tube, meaning the path between the end of the tube and the spring stop.
  • the outer tube would then be slipped over the spring and then pushed back onto the inner tube, with the spring being tensioned.
  • the entire spring ring closure would now be straightened, with the inner tube being straightened under the action of force by means of the pushed-back outer tube until both tubes were aligned over their imaginary center point.
  • the force of the spring would be released by releasing the outer tube, whereby the spring ring closure closes.
  • the exact alignment of the inner tube with the outer tube would be important, as a result of which the outer tube can be prevented from running past a free end of the inner tube.
  • Another advantage of this production method would be the fact that the spring would not have to be compressed until the outer tube was slipped over the inner tube, which would protect the spring from damage during production and also make production significantly easier.
  • FIG. 1 shows a cross section of a first exemplary embodiment of a spring ring closure 1 designed according to the invention.
  • 2 shows a cross section of a second exemplary embodiment of a spring ring closure 1 designed according to the invention.
  • the second exemplary embodiment is designed like the first exemplary embodiment, with the exception of the presence of an attached grip element 12, so that both Embodiments are described together.
  • the spring ring closure 1 consists of an outer tube 3, an inner tube 4 and a spring 6.
  • the outer tube 3 and the inner tube 4 here have a circular cross section.
  • the cross section can also be oval, rectangular, triangular or square, for example.
  • the two tubes 3, 4 can be made of gold, silver or stainless steel, for example, which can be used in particular in the manufacture of jewelry.
  • a spring ring closure 1 can be made from at least one noble metal and/or at least one base metal.
  • the spring ring closure 1 When closed ( Figures 1a and 2a ) the spring ring closure 1 forms a closed ring 2, which can have a diameter of less than 10 mm, preferably less than 6 mm. As already described above, the spring ring closure 1 can also have a larger diameter than 10 mm depending on the application. The spring ring closure 1 can ultimately have interesting applications for all sizes.
  • the outer tube 3 is slipped over the inner tube 4 with minimal play, so that the two tubes 3.4 can be moved relative to one another and guided.
  • an overlapping area 5 is formed by the outer tube 3 and inner tube 4, which in the open state ( Figures 1b and 2b ) is larger than when closed.
  • a second overlapping area 18 is formed, the second overlapping area 18 being delimited on the one hand by the spring stops 10 of the outer tube 3 and the inner tube 4 and on the other hand by an outer end 21 of the outer tube 3 .
  • the second Overlapping area 18 significantly increases the stability and security of spring ring closure 1 when closed.
  • the free end 8 of the inner tube 4 engages in the free end 8 of the outer tube 3.
  • Spring ring closures 1 are designed in such a way that the spring 6 is completely covered by the tube arrangement formed by the inner tube 4 and the outer tube 3 in the open and in the closed state. This is made possible by spring stops 10 which constrict the free ends 8 of the outer tube 3 and the inner tube 4 to such an extent that the spring 6 cannot jump out of the spring ring closure 1 even when it is open. Rather, the spring 6 presses against the spring stops 10 and is thus tensioned.
  • the spring stops 10 shown are soldered to the tubes 3, 4 as a ring or plate, but could alternatively also be formed out of the outer tube 3 or the inner tube 4.
  • the spring stops 10 are here identical to stops 9, which also touch in the closed state of the spring ring closure 1 ( Figures 1a and 2a ).
  • the stops 9 and spring stops 10 can also not be designed as identical components.
  • a cavity 7 can form between the stop 9 and the spring stop 10 of the inner tube 4 and/or between the stop 9 and the spring stop 10 of the outer tube 3 .
  • the stops 9 touch in the closed state of the spring ring closure 1, but the stops 9 no longer touch the spring 6.
  • the spring 6 then touches the Spring stops 10. Since a second cavity 7 can thus form, a first cavity 7, ie the cavity 7 that contains the spring 6, can be made smaller.
  • the spring stops 10 of both tubes 3.4 each form an opening 11, so that both the outer tube 3 and the inner tube 4 are not completely closed.
  • the openings 11 can be used, for example, to move the spring 6 with a tool, for example in order to align the spring 6 .
  • only one or neither of the two tubes 3, 4 can have an opening 11 formed by a stop 9 or a spring stop 10.
  • FIG. 2 shows a grip element 12, which can be used for easier operation of the spring ring closure 1, in particular with small spring ring closures 1.
  • the grip element 12 is in the Figures 2a and 2b attached to the outside 13 of the outer tube 3, but a grip element 12 can also be attached to the outside 14 of the inner tube 4. It is also conceivable to use more than one grip element 12 on a spring ring closure 1.
  • the section 16 of the spring 6 protruding from the inner tube 4 in the closed state is coiled more tightly than a section of the spring 6 located in the inner tube 4 in the closed state ( Figures 1a and 2b ).
  • the end of the spring 6 striking the free end 8 of the inner tube 4 can, as shown in FIGS Figures 1 and 2 set out to be more convoluted than the majority of the spring 6, which is located in the inner tube 4.
  • the protruding section 16 of the spring 6 is wound more tightly, so that the risk is reduced that the spring 6 will get caught on the edges 17 of the inner tube 4 when the spring ring closure 1 is opened ( Fig. 1a ).
  • the spring 6 can be protected and the spring ring fastener 1 can be opened and closed more easily.
  • the spring 6 can also have a constant winding density over its entire length. As a result, costs can be saved in the production of the spring, as a result of which the spring ring closure 1 can be designed more cheaply and thus more customer-friendly.
  • the outer tube 3 and the inner tube 4 are completely closed on their outer surface. This increases the rigidity of the outer tube 3 and the inner tube 4 so that twisting and thus unintentional opening of the spring ring closure 1 can be prevented.
  • the mechanism of the spring ring clasp 1 described above or claimed below can be used, for example, for clasps, pendants, bracelets and hoops 19 .
  • figure 3 shows a spring ring closure 1 designed as a creole 19.
  • Components and functional units that are functionally and/or structurally similar or identical to the previous exemplary embodiments are denoted by the same reference symbols and are not described separately again. The remarks on the Figures 1 and 2 therefore apply figure 3 accordingly.
  • Creole 19 shown is the spring stop 10 of the outer tube 3 is not set back, but arranged flush with the outer end 21 of the outer tube 3 .
  • a pin 20 is formed, in particular soldered, to the spring stop 10 .
  • the pin 20 protrudes into the free end 8 of the inner ear 4, the pin 20 reaching through the opening 11 of the spring stop 10 of the inner ear 4 and through the inner diameter of the spring 6 ( Figure 3a ).
  • a pin 20 protrudes through an opening 11 of a stop 9 of an inner tube 4 and reaches through a second cavity 7 up to a spring stop 10 of the inner tube 4 .
  • the advantage of the spring ring closure 1 designed as a creole 19 is that ear holes can be covered by the outer tube 3 or the inner tube 4 .
  • a creole 19 can advantageously be adapted to any ear size.
  • an end cap that has a larger diameter than the outer tube 3 can be attached to the outer end 21 of the outer tube 3 .
  • an end cap can be formed at the outer end 22 of the inner tube 4 which has a larger diameter than the inner tube 4 . This allows an even greater wearing comfort can be achieved because the force is distributed over a larger area and therefore there is less pressure on the earlobe.
  • the invention generally proposes a closed state, in which the spring ring closure 1 forms a closed ring 2, and an open state, in which the ring 2 is open, comprising an outer tube 3, an inner tube 4, which in an overlapping area 5 in the outer tube 3 protrudes, and a spring 6, which is arranged in a cavity 7 formed by the outer tube 3 and the inner tube 4, the outer tube 3 for opening the spring ring closure 1 against a spring force caused by the spring 6, with an increase in the overlapping area 5 to the inner tube 4 and wherein the spring 6 protrudes at least in the closed state from the inner tube 4 and protrudes into the outer tube 3, before.
  • the use of such a spring ring clasp 1 is preferably of interest in the jewelery industry, but is not limited to this area.

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EP21191339.7A 2021-08-13 2021-08-13 Fermeture à anneau élastique et fabrication d'une fermeture à anneau élastique Active EP4133963B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP21191339.7A EP4133963B1 (fr) 2021-08-13 2021-08-13 Fermeture à anneau élastique et fabrication d'une fermeture à anneau élastique
US17/884,647 US11950664B2 (en) 2021-08-13 2022-08-10 Spring ring clasp and method of producing a spring ring clasp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP21191339.7A EP4133963B1 (fr) 2021-08-13 2021-08-13 Fermeture à anneau élastique et fabrication d'une fermeture à anneau élastique

Publications (2)

Publication Number Publication Date
EP4133963A1 true EP4133963A1 (fr) 2023-02-15
EP4133963B1 EP4133963B1 (fr) 2024-06-26

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Application Number Title Priority Date Filing Date
EP21191339.7A Active EP4133963B1 (fr) 2021-08-13 2021-08-13 Fermeture à anneau élastique et fabrication d'une fermeture à anneau élastique

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US (1) US11950664B2 (fr)
EP (1) EP4133963B1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2305950A1 (fr) * 1975-03-29 1976-10-29 Sonnenberg Herbert Dispositif de fermeture pour bijoux tels que chaines, ou gourmettes
US20090013721A1 (en) * 2005-05-09 2009-01-15 Murao Co., Ltd. Clasp

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US917038A (en) * 1908-04-15 1909-04-06 Attleboro Chain Company Spring ring-snap.
US1017458A (en) * 1911-03-04 1912-02-13 Sheridan Smith Piper Link-guard.
US1209615A (en) * 1916-02-23 1916-12-19 John Zvetina Safety coupling device for jewelry.
US1244599A (en) * 1916-07-12 1917-10-30 B A Ballou And Company Inc Spring-ring.
US1386746A (en) * 1919-04-07 1921-08-09 Wachenheimer Bros Spring-ring
US1340206A (en) * 1919-06-05 1920-05-18 Ballou & Co B A Spring-ring
US1442096A (en) * 1921-10-05 1923-01-16 Henry J Spooner Spring ring
US1449175A (en) * 1922-02-25 1923-03-20 Grunebaum Charles Bead-clasp attachment
US2222053A (en) * 1940-02-26 1940-11-19 A E Waller Company Inc Spring ring
US4329765A (en) * 1979-09-28 1982-05-18 Nakawa Corporation Method for manufacturing a spring ring to be electroplated
IT1167973B (it) * 1981-09-08 1987-05-20 Uno A Erre Italiana Spa Perfezionamento in una chiusura con anello a molla per monili a collana bracciale ed altro
US7726152B2 (en) * 2004-12-15 2010-06-01 Guy Beard Magnetic jewelry clasp and article of jewelry
US20150040358A1 (en) * 2013-08-12 2015-02-12 Heather Jane Burns Jewelry spring ring clasp

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2305950A1 (fr) * 1975-03-29 1976-10-29 Sonnenberg Herbert Dispositif de fermeture pour bijoux tels que chaines, ou gourmettes
US20090013721A1 (en) * 2005-05-09 2009-01-15 Murao Co., Ltd. Clasp

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EP4133963B1 (fr) 2024-06-26
US11950664B2 (en) 2024-04-09
US20230046667A1 (en) 2023-02-16

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