US3684192A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Constant pressure, variable flow nozzle
Assignee: FIRE TASK FORCE INNOVATIONS
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Filing: 1970-06-22
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Granted: 1972-08-15
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Expires: 1990-06-22
Abstract
Abstract A constant pressure, variable flow nozzle is disclosed wherein a flow restricting baffle is automatically positioned by hydraulic means so as to pass only that flow which can be provided at the desired pressure, thereby maintaining effective reach and penetration characteristics of the stream from the nozzle, despite variations in supply. The nozzle contains a hydraulically controlled baffle and is particularly useful as a fire fighting device.
Inventors
- 👤 Clyde H Mcmillan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:28
CPC Classifications
B; B05; B05B; B05B1/00; B05B1/30; B05B1/32; B05B1/323; A; A62; A62C; A62C31/00; A62C31/02
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
69 words
An improved nozzle comprising a nozzle body, hydraulic means including a cylinder containing a moveable baffle-piston provided with orifice means, said hydraulic means being adapted to adjust automatically the position of said baffle-piston in said cylinder and with respect to said nozzle body creating a dynamic equilibrium in response to fluid quantity and pressure supplied said nozzle, to thereby provide nozzle pressure maintained at a predetermined, substantially constant level.
Claim 2
Dependent Claim
69 words
An improved nozzle comprising a nozzle body, hydraulic means including a cylinder containing a moveable baffle-piston provided with orifice means, said hydraulic means being adapted to adjust automatically the position of said baffle-piston in said cylinder and with respect to said nozzle body creating a dynamic equilibrium in response to fluid quantity and pressure supplied said nozzle, to thereby provide nozzle pressure maintained at a predetermined, substantially constant level.
Claim 3
Dependent Claim
40 words
The nozzle of claim 1 wherein said baffle comprises a face exterior to said cylinder and faces interior to said cylinder, said interior faces having a combined effective surface area greater than the effective surface area of said exterior face.
Claim 4
Dependent Claim
22 words
The nozzle of claim 2 wherein said baffle is provided with orifice means providing fluid passageway between said exterior and interior faces.
Claim 5
Dependent Claim
32 words
The nozzle of claim 1 wherein said cylinder is provided with integral valve means adapted to relieve said cylinder so as to maintain pressure in said cylinder within a predetermined pressure range.
Claim 6
Dependent Claim
19 words
The nozzle of claim 4 wherein said valve means include adjustable screw means for setting said predetermined pressure range.
Claim 7
Dependent Claim
28 words
The nozzle of claim 3 wherein the flow capability through said orifice means is exceeded by the flow capability of the integral valve means defined in claim 6.
Claim 8
Dependent Claim
123 words
A fire nozzle comprising a nozzle body including a fluid conduit; a stem, one end of said stem being attached to said nozzle body and the other end being attached to a cylinder; a movable baffle-piston adapted to slide within said cylinder and along a section of said stem; orifice means in said baffle-piston providing a passageway for fluid to flow from said fluid conduit into said cylinder; hydraulic valve means adapted to permit fluid to flow out from said cylinder when the pressure within said cylinder tends to exceed predetermined pressure; said baffle-piston being so arranged that its position with respect to said nozzle body defines an annular opening which permits fluid to flow around said piston-baffle and out of said nozzle.
Claim 9
Dependent Claim
123 words
A fire nozzle comprising a nozzle body including a fluid conduit; a stem, one end of said stem being attached to said nozzle body and the other end being attached to a cylinder; a movable baffle-piston adapted to slide within said cylinder and along a section of said stem; orifice means in said baffle-piston providing a passageway for fluid to flow from said fluid conduit into said cylinder; hydraulic valve means adapted to permit fluid to flow out from said cylinder when the pressure within said cylinder tends to exceed predetermined pressure; said baffle-piston being so arranged that its position with respect to said nozzle body defines an annular opening which permits fluid to flow around said piston-baffle and out of said nozzle.
Claim 10
Dependent Claim
17 words
A nozzle as defined by claim 7 wherein the size of said annular opening is controlled hydraulically.
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) | 1975-08-15 | 1976-02-14 | 1976-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-15 | 1980-02-14 | 1980-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-15 | 1984-02-14 | 1984-08-15 | $7700.00 | Window Closed / Lapsed |