US3714989A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flush type sprinkler
Assignee: GRUNAU SPRINKLER MANUFACTURING COMPANY Inc A WIS CORP
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Filing: 1971-06-07
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Granted: 1973-02-06
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Expires: 1991-06-07
Abstract
Abstract A SPRINKLER IS PROVIDED MOUNTED FLUSH IN A CEILING AND HAS AN OVERLAPPING OUTER ESCUTHCHEON PLATE RELEASABLY HELD IN PLACE BY RESILIENT UPWARDLY EXTENDING MEMBERS CONNECTED TO THE ESCUTHEON PLATE BY HEAT RESPONSIVE ELEMENTS. THE ESCUTCHEON PLATE IS NORMALLY SECURED IN COVERING RELATION TO THE SPRINKLER WHICH HAS A STRUT CONTAINING A HEAT RESPONSIVE ELEMENT WITH A DIFFERENT SELECTED HEAT RELEASE TEMPERATURE. HEAT SENSING FINS IN CONTACT WITH THE ESCUTCHEON PLATE ARE MOVABLE DOWNWARDLY BELOW THE CEILING LINE TO AN EXPOSED POSITION UPON RELEASE OF THE PLATE AND THEREBY INCREASE THE SENSITIVITY OF THE STRUT HEAT RESPONSIVE ELEMENT.
Inventors
- 👤 F Gloeckler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:31
CPC Classifications
A; A62; A62C; A62C35/00; A62C35/58; A62C35/60; A62C35/605; A62C37/00; A62C37/08; A62C37/09
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-06 | 1976-08-07 | 1977-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-06 | 1980-08-07 | 1981-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-06 | 1984-08-07 | 1985-02-06 | $7700.00 | Window Closed / Lapsed |