Patent US4790576A successfully refreshed from Google Patents.
US4790576A
Expired / Lapsed
US
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Magnet catch
Assignee: Murakoshi Seiko KK
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Filing: 1988-03-07
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Granted: 1988-12-13
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Expires: 2008-03-07
Abstract
Abstract A magnet catch wherein a magnet assembly is installed in a case from the front opening in such a way that it can be moved back and forth, an adjust cam is secured to an adjust spindle rotatably mounted to one side portion of the case and disposed in a direction perpendicular to that in which the magnet assembly advances and retracts, a cam groove is formed on the adjust cam in such a manner that the cam groove radius from the adjust spindle as the rotating center continuously changes, and a cam pin projecting from the magnet assembly is engaged with the cam groove.
Inventors
- 👤 Chiyokazu Higashi
- 👤 Takayuki Tajima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:03
CPC Classifications
E; E05; E05C; E05C19/00; E05C19/16; Y; Y10; Y10S; Y10S292/00; Y10S292/60; Y10T; Y10T292/00; Y10T292/11
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
144 words
A magnet catch comprising: a case with an open front; a magnet assembly installed in the case from the front opening in such a way that it can be moved back and forth; an adjust spindle rotatably mounted to one side portion of the case and disposed in a direction perpendicular to that in which the magnet assembly advances and retracts; a cam pin projecting from the magnet assembly either on the front side or the rear side of the adjust spindle with respect to a moving direction of the magnet assembly; and an adjust cam secured to the adjust spindle so that it can rotate with the latter and having a cam groove with which the cam pin engages, the cam groove being formed in such a manner that the cam groove radius from the adjust spindle as the rotating center continuously changes.
Claim 2
Dependent Claim
144 words
A magnet catch comprising: a case with an open front; a magnet assembly installed in the case from the front opening in such a way that it can be moved back and forth; an adjust spindle rotatably mounted to one side portion of the case and disposed in a direction perpendicular to that in which the magnet assembly advances and retracts; a cam pin projecting from the magnet assembly either on the front side or the rear side of the adjust spindle with respect to a moving direction of the magnet assembly; and an adjust cam secured to the adjust spindle so that it can rotate with the latter and having a cam groove with which the cam pin engages, the cam groove being formed in such a manner that the cam groove radius from the adjust spindle as the rotating center continuously changes.
Claim 3
Dependent Claim
40 words
A magnet catch as set forth in claim 1, wherein the case that rotatably supports the adjust spindle is provided with a rotation adjust section which allows a restricted rotation of the adjust spindle and prevents undesired rotation of it.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-12-13 | 1992-06-13 | 1992-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-12-13 | 1996-06-13 | 1996-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-12-13 | 2000-06-13 | 2000-12-13 | $7700.00 | Window Closed / Lapsed |