Patent US4550861A successfully refreshed from Google Patents.
US4550861A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lachrymator/dye dispenser
Assignee: PRO-TEX LP
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Filing: 1983-09-02
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Granted: 1985-11-05
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Expires: 2003-09-02
Abstract
Abstract A dispenser for dispensing a dye and a lachrymator in a stream, comprising a housing defining a closed cavity, a bore extending from the cavity to the exterior of the housing, a spool valve defining a longitudinal axis, disposed in the bore and moveable between open and closed positions, the spool valve being operable from the exterior of the housing and a nozzle extending from the bore to the exterior of the housing, the spool valve with the bore defining a chamber with which the nozzle communicates, the spool valve sealingly engaging the bore, when in the closed position, on both sides of the chamber, to exclude communication between the chamber and the cavity and, when in the open position, permitting communication of the chamber with the cavity whereby when a lachrymator under pressure is present in the interior of the housing, the lachrymator will pass through said chamber to and through the nozzle.
Inventors
- 👤 James P. Fay, Sr.
- 👤 James P. Fay, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:54
CPC Classifications
F; F41; F41H; F41H9/00; F41H9/10
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
196 words
A dispenser for dispensing a dye and a lachrymator, comprising a housing defining a closed cavity, an open ended bore extending from the cavity to the exterior of the housing, said bore having an orifice located in its sidewall in communication with said cavity, a spool valve defining a longitudinal axis, disposed in the bore and moveable between open and closed positions, a nozzle extending from the bore to the exterior of the housing, said spool valve with said bore defining a chamber with which said nozzle communicates, said spool valve sealingly engaging said bore, when in the closed position, on both sides of said chamber, to exclude communication between said chamber and the cavity and, when in the open position, said orifice permitting communication of said chamber with the cavity whereby when a lachrymator under pressure is present in the interior of the housing, said lachrymator will pass through said chamber to and through said nozzle, and means for opening said spool valve from the exterior of the housing, differential pressure when present between the interior of the housing and the exterior of the housing serving to move said spool valve to its closed position.
Claim 2
Dependent Claim
196 words
A dispenser for dispensing a dye and a lachrymator, comprising a housing defining a closed cavity, an open ended bore extending from the cavity to the exterior of the housing, said bore having an orifice located in its sidewall in communication with said cavity, a spool valve defining a longitudinal axis, disposed in the bore and moveable between open and closed positions, a nozzle extending from the bore to the exterior of the housing, said spool valve with said bore defining a chamber with which said nozzle communicates, said spool valve sealingly engaging said bore, when in the closed position, on both sides of said chamber, to exclude communication between said chamber and the cavity and, when in the open position, said orifice permitting communication of said chamber with the cavity whereby when a lachrymator under pressure is present in the interior of the housing, said lachrymator will pass through said chamber to and through said nozzle, and means for opening said spool valve from the exterior of the housing, differential pressure when present between the interior of the housing and the exterior of the housing serving to move said spool valve to its closed position.
Claim 3
Dependent Claim
33 words
A dispenser according to claim 1 wherein the chamber is for housing said dye and the lachrymator drives the dye before it through the nozzle when the valve is in its open position.
Claim 4
Dependent Claim
39 words
A dispenser according to claim 1, wherein the sealing engagement of said spool valve with said bore is by means of two O-rings only disposed in O-ring grooves in said spool valve one on either side of the chamber.
Claim 5
Dependent Claim
52 words
A dispenser according to claim 3, wherein the nozzle is defined by a nozzle member extending into said bore for abutment with annular flanges defining opposite ends of the chamber to limit longitudinal movement of the spool valve along the longitudinal axis thereof from its fully open to its fully closed position.
Claim 6
Dependent Claim
61 words
A dispenser according to claim 4, wherein the means for operating the spool valve is a stem projecting from the housing, a safety groove being disposed between the stem and the spool valve and positioned, when the valve is in its closed position, to accommodate a safety clip between the stem and the housing to prevent accidental operation of the valve.
Claim 7
Dependent Claim
21 words
A dispenser according to claim 5, wherein the housing comprises two moldings interconnected to define the closed cavity of the housing.
Claim 8
Dependent Claim
41 words
A dispenser according to claim 3, wherein the orifice interconnects said cavity and said chamber only when the valve is in its open position, said orifice extending laterally of the longitudinal axis through the housing from the cavity to the bore.
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) | 1988-11-04 | 1989-05-06 | 1989-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-04 | 1993-05-06 | 1993-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-04 | 1997-05-06 | 1997-11-05 | $7700.00 | Window Closed / Lapsed |