US4108247A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fire sprinkler head
Assignee: Individual
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Filing: 1977-01-25
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Granted: 1978-08-22
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Expires: 1997-01-25
Abstract
Abstract The sprinkler head includes a nozzle head and a deflector plate held a certain distance apart. Firmly gripped between these two are a closure element which seals off the nozzle orifice and a trigger element (e.g. a liquid-filled glass vessel or a fusible soldered link) which disintegrates under the action of heat. When the trigger element disintegrates, the closure element is no longer held over the nozzle orifice but is forced away by the pressure of the water in the supply line. A spring element acting on the closure element guides it to one side clear of the jet of water now emerging through the nozzle orifice. The closure element cannot therefore become lodged in the sprinkler head to obstruct the water jet and thus impair the water distributing function of the sprinkler head.
Inventors
- 👤 Johann Georg Mohler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:10
CPC Classifications
A; A62; A62C; A62C37/00; A62C37/08; A62C37/10; A62C37/11; A62C37/14
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
202 words
A fire sprinkler head which is mountable in a standing, suspended or horizontal position and includes: a nozzle head; a deflector plate; support means connecting the deflector plate to the nozzle head and including at least two support elements fastened to the edge of the deflector plate; a closure element seated sealingly over the mouth of the nozzle, the closure element having a groove at its perphery; a trigger element which exerts a closing force on the closure element and is actuable to remove the closing force to leave the closure element free to move clear of the nozzle mouth to allow a jet of water to emerge; and a length of spring wire which is substantially straight when in an unstressed condition and is mounted so that it lies in said groove tangentially against the periphery of the closure element and also against the perpheries of said support elements thereby to apply a biasing force to the closure element, so that when the closure force is removed and the closure element moves clear of the nozzle mouth, the spring wire, aided by the propulsive force of the water jet, urges the closure element clear of the region of the water jet.
Claim 2
Dependent Claim
202 words
A fire sprinkler head which is mountable in a standing, suspended or horizontal position and includes: a nozzle head; a deflector plate; support means connecting the deflector plate to the nozzle head and including at least two support elements fastened to the edge of the deflector plate; a closure element seated sealingly over the mouth of the nozzle, the closure element having a groove at its perphery; a trigger element which exerts a closing force on the closure element and is actuable to remove the closing force to leave the closure element free to move clear of the nozzle mouth to allow a jet of water to emerge; and a length of spring wire which is substantially straight when in an unstressed condition and is mounted so that it lies in said groove tangentially against the periphery of the closure element and also against the perpheries of said support elements thereby to apply a biasing force to the closure element, so that when the closure force is removed and the closure element moves clear of the nozzle mouth, the spring wire, aided by the propulsive force of the water jet, urges the closure element clear of the region of the water jet.
Claim 3
Dependent Claim
214 words
A fire sprinkler head which is mountable in a standing, suspended or horizontal position and includes: a nozzle head; a deflector plate; support means connecting the deflector plate to the nozzle head; a closure element seated sealingly over the mouth of the nozzle, the closure element having a groove extending round its periphery; a trigger element which exerts a closing force on the closure element and is actuable to remove the closing force to leave the closure element free to move clear of the nozzle mouth to allow a jet of water to emerge; and a spring element having a ring-shaped end section mounted in the groove and a U-shaped holder section, the free end of one limb the U being secured to the ring-shaped end section and the free end of the other limb of the U being pivotally mounted on the nozzle head to define a pivot point about which the closure element moves during the initial stages of the emergence of the closure element from the nozzle mouth, so that when the closure force is removed and the closure element moves clear of the nozzle mouth, the spring element causes the closure element, propelled by the force of the water jet, to move clear of the region of the water jet.
Claim 4
Dependent Claim
214 words
A fire sprinkler head which is mountable in a standing, suspended or horizontal position and includes: a nozzle head; a deflector plate; support means connecting the deflector plate to the nozzle head; a closure element seated sealingly over the mouth of the nozzle, the closure element having a groove extending round its periphery; a trigger element which exerts a closing force on the closure element and is actuable to remove the closing force to leave the closure element free to move clear of the nozzle mouth to allow a jet of water to emerge; and a spring element having a ring-shaped end section mounted in the groove and a U-shaped holder section, the free end of one limb the U being secured to the ring-shaped end section and the free end of the other limb of the U being pivotally mounted on the nozzle head to define a pivot point about which the closure element moves during the initial stages of the emergence of the closure element from the nozzle mouth, so that when the closure force is removed and the closure element moves clear of the nozzle mouth, the spring element causes the closure element, propelled by the force of the water jet, to move clear of the region of the water jet.
Claim 5
Dependent Claim
63 words
A sprinkler head as claimed in claim 2, wherein the spring element is made of spring wire and the nozzle head has a substantially radial slot for receiving said other limb of the U-shaped holder section and for determining the direction of motion of the closure element during the initial stages of the motion of the closure element away from the nozzle mouth.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-08-21 | 1982-02-20 | 1982-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-08-21 | 1986-02-20 | 1986-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-08-21 | 1990-02-20 | 1990-08-22 | $7700.00 | Window Closed / Lapsed |