US4253610A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Abrasive blast nozzle
Assignee: Individual
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Filing: 1979-09-10
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Granted: 1981-03-03
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Expires: 1999-09-10
Abstract
Abstract A modified abrasive blast nozzle is disclosed in the preferred embodiment which incorporates an elongate fitting having threads enabling it to be connected with a hose, an internal axial passage which tapers into a narrow neck and thereafter flares outwardly, the axial passage flaring at an internally located, encircling, water inlet manifold, the manifold being communicated to the axial passage by a number of small openings, and the nozzle body further including an inlet pipe connection for water. Abrasives under high pressure with a high volume of air flows through the axial passage. As it moves past the openings into the manifold, an aspirator effect is achieved which pulls water or other liquids from the aspirator manifold into the outlet flow of air and blasting or abrasive media to thereby moisten the media and surface as needed to prevent formation of a cloud of dust and to neutralize and/or trap any airborne chemical, free silica or contaminants.
Inventors
- 👤 Joe M. Larkin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:33
CPC Classifications
B; B24; B24C; B24C7/00; B24C7/0084; B24C5/00; B24C5/02; B24C5/04
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
237 words
An improved air blast nozzle which comprises: (a) an elongate nozzle body having an elongate, axial passage therethrough which passage has an inlet and an outlet; (b) means for joining said nozzle body to a hose at the inlet of said passage to introduce blast media and air flow through the elongate, axial passage; (c) said passage and said nozzle body being constructed and arranged to create a laterally directed aspirating force within said axial passage, said nozzle body including a funnel-shaped portion in said axial passage which serves as a compression venturi to increase the rate of flow of air and particle media flowing through said axial passage which is located upstream of said aspirator force, said funnel-shaped portion further including an axial portion extending therefrom which flares slightly for reducing the lateral aspirating force exerted on the inner walls of the axial passage; (d) a manifold means for receiving a wetting fluid therein, said manifold means extending about the elongate passage through said nozzle body and further including port means opening from said manifold means into said axial passage to permit wetting fluid to flow into said axial passage at the urging of the aspirating force acting thereon, and further including subsequent length of said axial passage to the outlet thereof in which length wetting fluid introduced into said axial passage is dispersed into the stream of air and blast media flowing through said passage.
Claim 2
Dependent Claim
237 words
An improved air blast nozzle which comprises: (a) an elongate nozzle body having an elongate, axial passage therethrough which passage has an inlet and an outlet; (b) means for joining said nozzle body to a hose at the inlet of said passage to introduce blast media and air flow through the elongate, axial passage; (c) said passage and said nozzle body being constructed and arranged to create a laterally directed aspirating force within said axial passage, said nozzle body including a funnel-shaped portion in said axial passage which serves as a compression venturi to increase the rate of flow of air and particle media flowing through said axial passage which is located upstream of said aspirator force, said funnel-shaped portion further including an axial portion extending therefrom which flares slightly for reducing the lateral aspirating force exerted on the inner walls of the axial passage; (d) a manifold means for receiving a wetting fluid therein, said manifold means extending about the elongate passage through said nozzle body and further including port means opening from said manifold means into said axial passage to permit wetting fluid to flow into said axial passage at the urging of the aspirating force acting thereon, and further including subsequent length of said axial passage to the outlet thereof in which length wetting fluid introduced into said axial passage is dispersed into the stream of air and blast media flowing through said passage.
Claim 3
Dependent Claim
47 words
The apparatus of claim 1 wherein said axial passage is formed with an internal step enlarging the diameter thereof and further locating said port means at said step facing the outlet of said axial passage for aspirating wetting fluid from said manifold means into said axial passage.
Claim 4
Dependent Claim
86 words
The apparatus of claim 2 wherein said step represents an abrupt transition in diameter of said axial passage and said transition is formed by the incorporation in said body of an encircling manifold cavity which is communicated to the exterior for connection with a source of a wetting fluid supplied through a lateral passage means and connected valve means and wherein said manifold means includes an insert located within said manifold cavity and has a finite number of individual port means opening into said axial passage.
Claim 5
Dependent Claim
31 words
The apparatus of claim 3 wherein said abrupt transition is formed at an angled insert having the form of a hollow insert fitting within said axial passage from said outlet thereof.
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) | 1984-03-02 | 1984-09-01 | 1985-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-02 | 1988-09-01 | 1989-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-02 | 1992-09-01 | 1993-03-03 | $7700.00 | Window Closed / Lapsed |