Patent DE302086C successfully refreshed from Google Patents.
Patent US3874456A successfully refreshed from Google Patents.
US3874456A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sprinkler
Assignee: GRUNAU SPRINKLER MANUFACTURING COMPANY Inc A WIS CORP
•
Filing: 1972-09-12
•
Granted: 1975-04-01
•
Expires: 1992-09-12
Abstract
Abstract A sprinkler of the actuator arm and temperature responsive strut type is provided with heat transfer fins mounted on the strut close to the fusible portion thereof and which has a greatly reduced thermal lag.
Inventors
- 👤 Fred A Gloeckler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:24
CPC Classifications
A; A62; A62C; A62C37/00; A62C37/08; A62C37/10; A62C37/11; A62C37/12
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
75 words
A sprinkler which comprises a frame, a deflector carried on said frame, said frame having a portion with a hollow bore terminating at a valve seat, a closure cap for said valve seat, and means including a strut having a portion of eutectic alloy with a predetermined melting temperature normally holding said closure cap seated on said valve seat, and means mounted on said strut for transmitting heat to said strut including outwardly extending fins.
Claim 2
Dependent Claim
75 words
A sprinkler which comprises a frame, a deflector carried on said frame, said frame having a portion with a hollow bore terminating at a valve seat, a closure cap for said valve seat, and means including a strut having a portion of eutectic alloy with a predetermined melting temperature normally holding said closure cap seated on said valve seat, and means mounted on said strut for transmitting heat to said strut including outwardly extending fins.
Claim 3
Dependent Claim
27 words
A sprinkler as defined in claim 1 in which said strut is vertically disposed and actuator arms are provided engaged with said strut and said closure cap.
Claim 4
Dependent Claim
21 words
A sprinkler as defined in claIm 1 in which said last mentioned means includes mounting collars from which said fins extend.
Claim 5
Dependent Claim
37 words
A sprinkler as defined in claim 3 in which said strut has a tubular portion within which said portion of eutectic alloy is disposed, and said mounting collars are mounted on the exterior of said tubular portion.
Claim 6
Dependent Claim
40 words
A sprinkler as defined in claim 1 in which said means for normally holding said closure cap seated has an adjusting screw in engagement with a portion thereof for determining the pressure of said closure cap on said valve seat.
Claim 7
Dependent Claim
57 words
A sprinkler as defined in claim 1 in which said frame has a cross head in spaced relation to said valve seat, and a screw is in threaded engagement with said cross head and is in engagement with a portion of said strut, and said screw determines the force applied by said closure cap on said seat.
Claim 8
Dependent Claim
16 words
A sprinkler as defined in claim 6 in which said deflector is carried on said screw.
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) | 1978-03-31 | 1978-09-30 | 1979-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-31 | 1982-09-30 | 1983-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-31 | 1986-09-30 | 1987-04-01 | $7700.00 | Window Closed / Lapsed |