Patent US4805261A successfully refreshed from Google Patents.
US4805261A
Expired / Lapsed
US
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Resettable fire link
Assignee: SAFE-AIR OF ILLINOIS Inc A ILLINOIS CORP
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Filing: 1987-10-08
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Granted: 1989-02-21
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Expires: 2007-10-08
Abstract
Abstract A resettable fire link includes a first member (12) that pivotally supports a latch arm (20) thereon with a bi-metallic coil spring (30) interposed between the first member and the free end of the latch arm to normally bias the latch arm into a latched position with a release plate (50). The bi-metallic coil spring pivots the latch arm to a release position upon being elevated in temperature.
Inventors
- 👤 Shlomo Barchechat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:08
CPC Classifications
F; F16; F16G; F16G15/00; F16G15/04; A; A62; A62C; A62C2/00; A62C2/06; A62C2/24; A62C2/241; A62C2/245; G; G08; G08B; G08B17/00; G08B17/06
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
109 words
A resettable fire link comprising a first member having a support post thereon, a separate latch arm pivoted on said post, a latching element on a free end of said latch arm, a release plate having a slot for receiving said latch element, and a separate bi-metallic coil spring surrounding said post and spaced axially from said latch arm at said post, said spring having one end connected to said post and an opposite end connected to said free end of said latch arm and normally biasing said latch element into said slot while pivoting said latch arm to a released position upon being elevated to a predetermined temperature.
Claim 2
Dependent Claim
109 words
A resettable fire link comprising a first member having a support post thereon, a separate latch arm pivoted on said post, a latching element on a free end of said latch arm, a release plate having a slot for receiving said latch element, and a separate bi-metallic coil spring surrounding said post and spaced axially from said latch arm at said post, said spring having one end connected to said post and an opposite end connected to said free end of said latch arm and normally biasing said latch element into said slot while pivoting said latch arm to a released position upon being elevated to a predetermined temperature.
Claim 3
Dependent Claim
24 words
A resettable fire link as defined in claim 1, in which said first member includes plate means defining a slot for said release plate.
Claim 4
Dependent Claim
37 words
A resettable fire link as defined in claim 1, in which said latch arm has a latching surface with a camming surface leading from said latching surface engageable by said release plate during resetting of said link.
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) | 1992-02-21 | 1992-08-22 | 1993-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-21 | 1996-08-22 | 1997-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-21 | 2000-08-22 | 2001-02-21 | $7700.00 | Window Closed / Lapsed |