US3554450A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spray gun with replaceable cartridges
Assignee: Individual
•
Filing: 1968-11-15
•
Granted: 1971-01-12
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Expires: 1988-11-15
Abstract
Abstract A handheld spray gun accommodating a removable cartridge insert and a combined aspirator-piercing element for piercing the cartridge and permitting the contents thereof to flow by aspirating means through the nozzle of the spray gun when water under pressure is transmitted through said spray gun.
Inventors
- 👤 Thomas F D Muhala
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:45
CPC Classifications
B; B05; B05C; B05C17/00; B05C17/005; B05C17/00586; B05B; B05B7/00; B05B7/24; B05B7/2402; B05B7/2405; B05B7/2435; B05B7/244; B05B7/2454; B05B7/2481
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
237 words
A spray gun comprising a housing, a nozzle on said housing, an exit slot at the outer end of said nozzle, a cartridge chamber in said housing, a nozzle chamber in said nozzle axially aligned with said cartridge chamber, an aspirator needle element mounted between said cartridge chamber and said nozzle chamber, said element being axially aligned within said housing and having a unitary axial channel therein, the aspirator portion of said element extending within said nozzle chamber and terminating near said slot, said needle portion extending partially into said cartridge chamber, a threadable cap on the rear end of said cartridge chamber, an annular shoulder formed in said housing between said cartridge chamber and said nozzle chamber, a spring mounted at the juncture between said nozzle and cartridge chambers and extending partially into said cartridge chamber, a tubular cartridge movable longitudinally within said cartridge chamber, said cartridge being urged into firm abutment with said annular shoulder against the action of said spring by the threading engagement of said cap with said housing, said action causing said needle portion to pierce the forward end wall of said cartridge to enter into the interior thereof, and a tubular handle element on said housing, the interior channel of said handle communicating with the interior of said housing whereby fluid flowing from said handle into said housing flows thereafter into said nozzle when said cartridge is retracted from said shoulder.
Claim 2
Dependent Claim
237 words
A spray gun comprising a housing, a nozzle on said housing, an exit slot at the outer end of said nozzle, a cartridge chamber in said housing, a nozzle chamber in said nozzle axially aligned with said cartridge chamber, an aspirator needle element mounted between said cartridge chamber and said nozzle chamber, said element being axially aligned within said housing and having a unitary axial channel therein, the aspirator portion of said element extending within said nozzle chamber and terminating near said slot, said needle portion extending partially into said cartridge chamber, a threadable cap on the rear end of said cartridge chamber, an annular shoulder formed in said housing between said cartridge chamber and said nozzle chamber, a spring mounted at the juncture between said nozzle and cartridge chambers and extending partially into said cartridge chamber, a tubular cartridge movable longitudinally within said cartridge chamber, said cartridge being urged into firm abutment with said annular shoulder against the action of said spring by the threading engagement of said cap with said housing, said action causing said needle portion to pierce the forward end wall of said cartridge to enter into the interior thereof, and a tubular handle element on said housing, the interior channel of said handle communicating with the interior of said housing whereby fluid flowing from said handle into said housing flows thereafter into said nozzle when said cartridge is retracted from said shoulder.
Claim 3
Dependent Claim
30 words
A spray gun according to claim 1 and further comprising means at the end of said handle for attaching a pipe connected to a suitable source of water under pressure.
Claim 4
Dependent Claim
71 words
A spray gun according to claim 1 wherein the aspirator portion of said element terminates a short distance behind said slot within said nozzle and wherein fluid under pressure is caused to flow from said housing and through said nozzle whereby said fluid mixes with the contents of said cartridge in the area between the end of said aspirator portion and said slot before said mixture is emitted from said slot.
Claim 5
Dependent Claim
123 words
A spray gun comprising a housing, a nozzle on said housing, a cartridge removably inserted into said housing, means between said housing and said nozzle to puncture and enter the interior of said cartridge to provide a channel for the contents of said cartridge to flow by aspiration through said puncturing means into said nozzle, pressure means for causing said cartridge to move into a position where it makes a liquidtight seal between said housing and said nozzle, biasing means causing said cartridge to move away from said sealing position when said pressure means are retracted, and means for introducing liquid under pressure into said housing around said cartridge and to flow into and out of said nozzle when said cartridge is retracted.
Claim 6
Dependent Claim
123 words
A spray gun comprising a housing, a nozzle on said housing, a cartridge removably inserted into said housing, means between said housing and said nozzle to puncture and enter the interior of said cartridge to provide a channel for the contents of said cartridge to flow by aspiration through said puncturing means into said nozzle, pressure means for causing said cartridge to move into a position where it makes a liquidtight seal between said housing and said nozzle, biasing means causing said cartridge to move away from said sealing position when said pressure means are retracted, and means for introducing liquid under pressure into said housing around said cartridge and to flow into and out of said nozzle when said cartridge is retracted.
Claim 7
Dependent Claim
52 words
A spray gun according to claim 4 and further comprising grooved means on said puncturing means to equalize pressure on the interior and exterior of said cartridge to permit the contents of said cartridge to flow into said nozzle when Said cartridge is retracted to a suitable distance from said sealing position.
Claim 8
Dependent Claim
56 words
A spray gun according to claim 4 wherein said cartridge is made of a sufficiently stiff material whereby the puncturing thereof by said puncturing means produces at least one aperture in said cartridge by which pressure is equalized between the interior and exterior of said cartridge to permit the contents thereof to flow into said nozzle.
Claim 9
Dependent Claim
38 words
A spray gun according to claim 4 and further comprising a handle on said housing, the interior of said handle communicating with the interior of said housing, said handle being attachable to a source of fluid under pressure.
Claim 10
Dependent Claim
47 words
A spray gun according to claim 4 and further comprising a plurality of inwardly extending longitudinal ridges on the interior walls of said housing, said ridges supporting said cartridge in a spaced relationship to the interior walls of said cartridge to permit fluid flow around said cartridge.
Claim 11
Dependent Claim
44 words
A spray gun according to claim 4 and further comprising a yieldable, resilient O-ring interposed between said cartridge and said housing, said pressure means causing said cartridge to be urged against said O-ring to produce a watertight seal between said cartridge and said housing.
Claim 12
Dependent Claim
140 words
A spray gun according to claim 4 wherein said puncturing means comprises a support mounted in the area between said housing and said nozzle, at least one aperture in said support to permit fluid flow from the interior of said housing into the interior of said nozzle, a hollow puncturing element on said support extending at least partially into said housing, an aspirating tube on said support extending toward the exit end of said nozzle, said hollow puncturing element and said aspirating tube having a common unitary channel, the flow of water under pressure from the interior of the housing through the interior of said nozzle causing the movement by aspiration of the contents of said cartridge through said puncturing element and said aspirating tube, said fluid and said contents being mixed in said nozzle just prior to emerging therefrom.
Claim 13
Dependent Claim
92 words
A spray gun comprising a housing, a nozzle on said housing, means in said housing for removably accommodating a cartridge, means in said housing for piercing said cartridge, aspirator means connected to said piercing means for conducting the contents of said cartridge through said nozzle, a unitary channel in said piercing and aspirating means, and means for transmitting fluid under pressure through said nozzle to produce the aspirating action through said aspirator and piercing means whereby said fluid and the contents of said cartridge are mixed before being discharged from said nozzle.
Claim 14
Dependent Claim
92 words
A spray gun comprising a housing, a nozzle on said housing, means in said housing for removably accommodating a cartridge, means in said housing for piercing said cartridge, aspirator means connected to said piercing means for conducting the contents of said cartridge through said nozzle, a unitary channel in said piercing and aspirating means, and means for transmitting fluid under pressure through said nozzle to produce the aspirating action through said aspirator and piercing means whereby said fluid and the contents of said cartridge are mixed before being discharged from said nozzle.
Claim 15
Dependent Claim
91 words
A spray gun comprising a housing, a nozzle on said housing, means in said housing for removably accommodating a cartridge, means in said housing for piercing said cartridge to equalize the pressure between the interior and exterior of said cartridge, aspirator means mounted in said housing for conducting the contents of said cartridge through said nozzle, and means for transmitting fluid under pressure through said nozzle to produce the aspirating action through said aspirator whereby said fluid and the contents of said cartridge are mixed before being discharged from said nozzle.
Claim 16
Dependent Claim
91 words
A spray gun comprising a housing, a nozzle on said housing, means in said housing for removably accommodating a cartridge, means in said housing for piercing said cartridge to equalize the pressure between the interior and exterior of said cartridge, aspirator means mounted in said housing for conducting the contents of said cartridge through said nozzle, and means for transmitting fluid under pressure through said nozzle to produce the aspirating action through said aspirator whereby said fluid and the contents of said cartridge are mixed before being discharged from said nozzle.
Claim 17
Dependent Claim
63 words
A spray gun comprising a housing, a nozzle on said housing, means in said housing for removably accommodating a cartridge, means for conducting the contents of said cartridge into the interior of said nozzle, means for transmitting fluid under pressure into said nozzle and to mix said fluid with the contents of said cartridge within said nozzle before said mixture is discharged therefrom.
Claim 18
Dependent Claim
63 words
A spray gun comprising a housing, a nozzle on said housing, means in said housing for removably accommodating a cartridge, means for conducting the contents of said cartridge into the interior of said nozzle, means for transmitting fluid under pressure into said nozzle and to mix said fluid with the contents of said cartridge within said nozzle before said mixture is discharged therefrom.
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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |