US5572772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic fastener
Assignee: Tarmo Co Ltd
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Filing: 1994-12-28
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Granted: 1996-11-12
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Expires: 2014-12-28
Abstract
Abstract A fastener comprising a male member (A) and a female member (B), wherein a projection (P) including a magnet is disposed on the male member and the female member defines an opening adapted to receive the projection. A slidable engagement member (60), which includes a ferromagnetic portion (61) and a non-magnetic or weakly magnetic portion (62), is disposed within the female member and is slidable relative thereto. The engagement member is positioned such that after the male member is inserted into the female member the attraction between the ferromagnetic portion and the magnet moves the engagement member into a locking relationship with the male member.
Inventors
- 👤 Tamao Morita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 02:29
CPC Classifications
E; E05; E05B; E05B47/00; E05B47/0038; A; A45; A45C; A45C13/00; A45C13/10; A45C13/1076; E05B65/00; E05B65/52; E05B65/5207; E05B65/5215; E05B65/523; Y; Y10; Y10T; Y10T24/00; Y10T24/32
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
123 words
A fastener comprising: a male member including an upstanding projection having a magnet source; a female member including a housing member and an engagement member slideably received within the housing member, said engagement member comprising a first portion which is ferromagnetic and a second portion which is non-ferromagnetic or weakly magnetic; wherein the housing member and the engagement member define openings through which the upstanding projection is removably insertable, and wherein after the projection is inserted into the openings an attraction force between the magnet source and the first portion causes the first portion to slide toward the magnet source until the engagement member is in a locking relationship with the projection; wherein the second portion inhibits magnetic leakage from said magnet source.
Claim 2
Dependent Claim
123 words
A fastener comprising: a male member including an upstanding projection having a magnet source; a female member including a housing member and an engagement member slideably received within the housing member, said engagement member comprising a first portion which is ferromagnetic and a second portion which is non-ferromagnetic or weakly magnetic; wherein the housing member and the engagement member define openings through which the upstanding projection is removably insertable, and wherein after the projection is inserted into the openings an attraction force between the magnet source and the first portion causes the first portion to slide toward the magnet source until the engagement member is in a locking relationship with the projection; wherein the second portion inhibits magnetic leakage from said magnet source.
Claim 3
Dependent Claim
44 words
The fastener according to claim 1, further comprising a ridge disposed on the projection, said ridge positioned above the first member when the first portion is in the locking relationship with the projection, thus preventing the engagement member from separating away from the projection.
Claim 4
Dependent Claim
23 words
The fastener according to claim 2, further comprising a round surface formed on top of the projection to facilitate insertion of the projection.
Claim 5
Dependent Claim
65 words
The fastener according to claim 1, wherein the engagement means further comprises a manipulable portion such that when the first portion is in the locking relationship with the projection, the manipulable portion is exposed outside of the housing member such that if the manipulable portion is pushed back into the housing member the first portion and the projection are no longer in a locking relationship.
Claim 6
Dependent Claim
22 words
The fastener according to claim 1, wherein the housing member comprises a top plate and a bottom plate affixed to each other.
Claim 7
Dependent Claim
18 words
The fastener according to claim 1, wherein the magnet source is a permanent magnet disposed within the projection.
Claim 8
Dependent Claim
15 words
The fastener according to claim 1, wherein the magnet source is distributed throughout the projection.
References Cited (Backward Citations)
US3364532A
Cited
US5199138A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-11-12 | 2000-05-13 | 2000-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-11-12 | 2004-05-13 | 2004-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-11-12 | 2008-05-13 | 2008-11-12 | $7700.00 | Window Closed / Lapsed |