Patent US3797747A successfully refreshed from Google Patents.
US3797747A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for aspirating and admixing additives into a stream
Assignee: Hansgrohe SE
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Filing: 1972-09-22
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Granted: 1974-03-19
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Expires: 1992-09-22
Abstract
Abstract The additives are aspirated and admixed into a stream of liquid by means of an injector having a main bore, increasing in width in the flow direction, and suction bores communicating with the main bore. A liquid-return-flow interrupter is arranged at the inlet side of the injector and is in the form of a free jet air chamber communicating with the open air through corresponding openings and adapted to be bridged by the liquid concentrated into a fine jet by a nozzle bore. An acceleration chamber, converging in the flow direction, is arranged at the inlet end of the nozzle bore whose outlet end communicates with the free jet air chamber at the inlet side of the latter. An apertured disc is positioned at the inlet side of the acceleration chamber and is formed with a plurality of bores therethrough for flow of liquid to the acceleration chamber.
Inventors
- 👤 G Buzzi
- 👤 W Lorch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:59
CPC Classifications
E; E03; E03C; E03C1/00; E03C1/02; E03C1/04; E03C1/046
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
184 words
In a device for aspirating and admixing additives into a stream of liquid by means of an injector having a main bore, which increases in width in the flow direction, and suction bores communicating with the main bore, and a liquid-return-flow interrupter arranged at the inlet side of the injector, in the form of a free jet air chamber communicating with the open air through corresponding openings and adapted to be bridged by the liquid concentrated into a fine jet by a nozzle bore having a discharge end spaced axially from the inlet side of the injector by the interposed free jet air chamber, so that the fine jet traverses the free jet air chamber in laterally unconfined condition, the improvement comprising, in combination, means forming an acceleration chamber, converging in the flow direction, arranged at the inlet end of said nozzle bore which latter communicates with said free jet air chamber at the inlet side of said free jet air chamber; and an apertured disc positioned at the inlet side of said acceleration chamber and formed with a plurality of passage bores therethrough.
Claim 2
Dependent Claim
184 words
In a device for aspirating and admixing additives into a stream of liquid by means of an injector having a main bore, which increases in width in the flow direction, and suction bores communicating with the main bore, and a liquid-return-flow interrupter arranged at the inlet side of the injector, in the form of a free jet air chamber communicating with the open air through corresponding openings and adapted to be bridged by the liquid concentrated into a fine jet by a nozzle bore having a discharge end spaced axially from the inlet side of the injector by the interposed free jet air chamber, so that the fine jet traverses the free jet air chamber in laterally unconfined condition, the improvement comprising, in combination, means forming an acceleration chamber, converging in the flow direction, arranged at the inlet end of said nozzle bore which latter communicates with said free jet air chamber at the inlet side of said free jet air chamber; and an apertured disc positioned at the inlet side of said acceleration chamber and formed with a plurality of passage bores therethrough.
Claim 3
Dependent Claim
44 words
In a device for aspirating and admixing additives into a stream of liquid, the improvement claimed in claim 1, in which the diameter of the passage bores of the apertured disc is less, by one third, than the axial length of said passage bores.
Claim 4
Dependent Claim
73 words
In a device for aspirating and admixing additives into a stream of liquid, the improvement claimed in claim 1, including means forming a dynamic pressure chamber interposed between said acceleration chamber and said apertured disc; the internal diameter of said dynamic pressure chamber being greater than the entrance diameter of said acceleration chamber, and the axial length of said dynamic pressure chamber being substantially equal to the axial thickness of said apertured disc.
Claim 5
Dependent Claim
129 words
In a device for aspirating and admixing additives into a stream of liquid, the improvement claimed in claim 1, including a sleeve having said nozzle bore formed therethrough; a second chamber adjacent the outlet end of said nozzle bore and having a conical internal periphery converging in the flow direction; the inlet side entrance diameter of said second chamber being at least two times larger than the outlet end terminal diameter of said sleeve; said second chamber communicating, on its outlet side, with a concentric bore forming at least part of the main bore of said injector; and means forming a cavity communicating with the outer air through openings and forming part of said free jet air chamber; said second chamber communicating, on its inlet side, with said cavity.
Claim 6
Dependent Claim
32 words
In a device for aspirating and admixing additives into a stream of liquid, the improvement claimed in claim 4, in which the axial length of said second chamber is at least 15mm.
Claim 7
Dependent Claim
38 words
In a device for aspirating and admixing additives into a stream of liquid, the improvement claimed in claim 1, including a laminator arranged concentrically in said acceleration chamber and having an external form converging in the flow direction.
Claim 8
Dependent Claim
81 words
In a device for aspirating and admixing additives into a stream of liquid, the improvement claimed in claim 6, in which said laminator is a substantially conical body defining, with the interior surface of said acceleration chamber, an annular flow passage; the angle of divergence of said laminator being larger than the angle of divergence of said accelerating chamber, so that the cross-sectional area of said annular flow passage decreases at least substantially continuously in a direction toward said nozzle bore.
Claim 9
Dependent Claim
27 words
In a device for aspiRating and admixing additives into a stream of liquid, the improvement claimed in claim 7, in which said laminator is a drop-shaped body.
Claim 10
Dependent Claim
32 words
In a device for aspirating and admixing additives into a stream of liquid, the improvement claimed in claim 6, in which said laminator is formed with an axial bore extending centrically therethrough.
Claim 11
Dependent Claim
64 words
In a device for aspirating and admixing additives into a stream of liquid, the improvement claimed in claim 6, including a sleeve enclosing said means forming said acceleration chamber; said laminator having a fastening element on its inlet end and being fixed in said sleeve, concentrically and detachably, by a holder engaging said fastening element and formed with a plurality of axial passages therethrough.
Claim 12
Dependent Claim
28 words
In a device for aspirating and admixing additives into a stream of liquid, the improvement claimed in claim 10, in which said fastening element is a center stud.
Claim 13
Dependent Claim
28 words
In a device for aspirating and admixing additives into a stream of liquid, the improvement claimed in claim 10, in which said fastening element is a hollow tenon.
Claim 14
Dependent Claim
25 words
In a device for aspirating and admixing additives into a stream of liquid, the improvement claimed in claim 10, in which said holder is disc-shaped.
Claim 15
Dependent Claim
25 words
In a device for aspirating and admixing additives into a stream of liquid, the improvement claimed in claim 10, in which said holder is star-shaped.
Claim 16
Dependent Claim
42 words
In a device for aspirating and admixing additives into a stream of liquid, the improvement claimed in claim 1, including a sleeve; and an exchangeable tubular piece inserted into said sleeve and having said acceleration chamber and said nozzle bore formed therein.
Claim 17
Dependent Claim
29 words
In a device for aspirating and admixing additives into a stream of liquid, the improvement claimed in claim 15, in which said tubular piece is made of synthetic material.
Claim 18
Dependent Claim
45 words
In a device for aspirating and admixing additives into a stream of liquid, the improvement claimed in claim 16, including a laminator positioned concentrically in said acceleration chamber and having an exterior shape converging in the flow direction; said laminator being made of synthetic material.
Claim 19
Dependent Claim
79 words
In a device for aspirating and admixing additives into a stream of liquid, the improvement claimed in claim 1, in which said injector main bore, adjacent the outlet side of said free jet air chamber, has a diameter approximately equal to the outlet diameter of said nozzle bore; said suction bores communicating radially with said main bore; the diameter of said main bore, in the zone of said radial suction bores, having a stepwise change to a larger diameter.
Claim 20
Dependent Claim
47 words
In a device for aspirating and admixing additives into a stream of liquid, the improvement claimed in claim 18, in which said main bore, adjacent the outlet side of said free jet air chamber, has a diameter slightly larger than the outlet diameter of said nozzle bore.
Claim 21
Dependent Claim
36 words
In a device for aspirating and admixing additives into a stream of liquid, the improvement claimed in claim 1, in which said injector comprises a tubular element of synthetic material interchangeably inserted into a metallic tube.
Claim 22
Dependent Claim
53 words
In a device for aspirating and admixing additives into a stream of liquid, the improvement claimed in claim 20, including a sleeve having said nozzle bore and said acceleration chamber formed therein; said sleeve and said metallic tube being threadedly connected to each other in the zone of said free jet air chamber.
References Cited (Backward Citations)
US2571871A
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US2682428A
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US2724583A
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US2800313A
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US2719704A
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US3303800A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |