US4010902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blow guns
Assignee: Taylor and Osborne Ltd
•
Filing: 1975-11-03
•
Granted: 1977-03-08
•
Expires: 1995-11-03
Abstract
Abstract The blow gun comprises a hollow body having an inlet for compressed air at one end of the body. A tube extending from the other end of the body has a closed end mounted to swivel in the body, and has a radial port leading from the interior to the exterior of the tube adjacent to the closed end of the tube. A cap carried by the closed end of the tube is radially spaced from the periphery of the tube and shrouds the port. A seal is located in the body, surrounding the tube, on which the cap normally seats to prevent air from entering the port, but from which one side of the cap can be separated by swinging the tube out of axial alignment with the body, to admit air to the port. A nozzle fixed on the outer end of the tube has a Venturi passage extending outward from the tube, the inner end of such passage being radially spaced from the tube and having ports arranged laterally of the tube which act as inlets when air is discharged through the nozzle and as outlets when the nozzle is obstructed. A plurality of radial vanes on the periphery of the nozzle extend from the inner ends of the lateral ports substantially beyond the outer end thereof.
Inventors
- 👤 Geoffrey Edward Speyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:36
CPC Classifications
B; B05; B05B; B05B1/00; B05B1/30; B05B1/3013; B05B1/005; Y; Y10; Y10S; Y10S239/00; Y10S239/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
229 words
A blow gun comprising a hollow body having an inlet for compressed air at one end of the body, a tube extending from the other end of the body, said tube having a closed end mounted to swivel in the body, and further having radial port leading from the interior to the exterior of the tube adjacent to the closed end of the tube, a cap carried by the closed end of the tube which is radially spaced from the periphery of the tube and shrouds said port, a seal in the body, surrounding the tube, on which the cap normally seats to prevent air from entering said port, but from which one side of the cap can be separated by swinging the tube out of axial alignment with the body to admit air to said port, wherein the improvement comprises a nozzle fixed on the outer end of the tube, said nozzle having a Venturi passage extending outward from the tube, the inner end of such passage being radially spaced from the tube and having ports arranged laterally of the tube which act as inlets when air is discharged through the nozzle and as outlets when the nozzle is obstructed, and a plurality of radial vanes on the periphery of the nozzle which extend from the inner ends of the lateral ports substantially beyond the outer ends thereof.
Claim 2
Dependent Claim
229 words
A blow gun comprising a hollow body having an inlet for compressed air at one end of the body, a tube extending from the other end of the body, said tube having a closed end mounted to swivel in the body, and further having radial port leading from the interior to the exterior of the tube adjacent to the closed end of the tube, a cap carried by the closed end of the tube which is radially spaced from the periphery of the tube and shrouds said port, a seal in the body, surrounding the tube, on which the cap normally seats to prevent air from entering said port, but from which one side of the cap can be separated by swinging the tube out of axial alignment with the body to admit air to said port, wherein the improvement comprises a nozzle fixed on the outer end of the tube, said nozzle having a Venturi passage extending outward from the tube, the inner end of such passage being radially spaced from the tube and having ports arranged laterally of the tube which act as inlets when air is discharged through the nozzle and as outlets when the nozzle is obstructed, and a plurality of radial vanes on the periphery of the nozzle which extend from the inner ends of the lateral ports substantially beyond the outer ends thereof.
Claim 3
Dependent Claim
59 words
A blow gun according to claim 1 comprising an assembly at the inner end of the Venturi passage having an inlet passage into which the outer end of the tube has a push-fit, a spring washer captively concealed in said assembly being arranged to receive and be deflected by the tube to lock the tube in said inlet passage.
Claim 4
Dependent Claim
43 words
A blow gun according to claim 2 wherein the assembly at the inner end of the Venturi passage comprises an annular threaded plug screwed into the inner end of the nozzle and cemented in place by an adhesive, to retain the spring washer.
Claim 5
Dependent Claim
85 words
A blow gun according to claim 1 comprising an assembly at the inner end of the Venturi passage having an inlet passage into which the outer end of the tube has a push-fit, said assembly comprising a tapered internal nozzle which forms the end of the inlet passage and which extends into the inner end of the Venturi passage and terminates downstream of said lateral ports, thus providing an annular passageway surrounding said tapered nozzle to direct the flow of air entering said lateral ports.
Claim 6
Dependent Claim
34 words
A blow gun according to claim 4 wherein a spring washer captively concealed in said assembly is arranged to receive and be deflected by the tube to lock the tube in said inlet passage.
Claim 7
Dependent Claim
43 words
A blow gun according to claim 5 wherein the assembly at the inner end of the Venturi passage comprises an annular threaded plug screwed into the inner end of the nozzle and cemented in place by an adhesive, to retain the spring washer.
References Cited (Backward Citations)
US2950132A
Cited
US3445069A
Cited
GB1255329A
Cited
US3647142A
Cited
US3952955A
Cited
US3963180A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-03-07 | 1980-09-06 | 1981-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-07 | 1984-09-06 | 1985-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-07 | 1988-09-06 | 1989-03-08 | $7700.00 | Window Closed / Lapsed |