Patent US5226329A successfully refreshed from Google Patents.
US5226329A
Expired / Lapsed
US
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Flow sensor
Assignee: Is Industrial Supply Bv
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Filing: 1991-01-04
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Granted: 1993-07-13
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Expires: 2011-01-04
Abstract
Abstract The invention relates to a flow sensor, particularly a fluid flow meter, comprising a cylindrical housing wherein, at least locally, near a rotor mounted in said housing, a helicoidally moving fluid flow is created by at least one jet propulsion activating element, characterized in that said jet propulsion activating element is formed in relief on a part of the inner wall of said housing (1) and is manufactured together with the latter in one step, and further characterized in that said housing (1) is closed by a stop plate (6), except for at least one passage (10), however, between the outer circumference of the stop plate and the inner circumference of said housing (1).
Inventors
- 👤 Paulus J. Peters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:58
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/05; G01F1/10; G01F1/103
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
147 words
An apparatus for measuring a fluid flow rate, comprising: (a) a cylindrical housing formed as a single integral piece having a through opening defining an inner wall, the inner wall having an enlarged diameter wall portion to provide an axial inlet and having a narrower diameter wall portion at an outlet providing a shoulder therebetween; (b) a rotor mounted in the narrower diameter wall portion of the housing; (c) a jet propulsion activating element formed in relief on the shoulder of the housing for creating a helicoidally moving fluid flow in the housing near the rotor; and (d) a stop plate having an outer circumference, the stop plate mounted in the enlarged diameter wall portion of the housing defining at least one fluid passage therein, the fluid passage being between the outer circumference of the stop plate and the enlarged diameter wall portion of the inner wall.
Claim 2
Independent Claim
147 words
An apparatus for measuring a fluid flow rate, comprising: (a) a cylindrical housing formed as a single integral piece having a through opening defining an inner wall, the inner wall having an enlarged diameter wall portion to provide an axial inlet and having a narrower diameter wall portion at an outlet providing a shoulder therebetween; (b) a rotor mounted in the narrower diameter wall portion of the housing; (c) a jet propulsion activating element formed in relief on the shoulder of the housing for creating a helicoidally moving fluid flow in the housing near the rotor; and (d) a stop plate having an outer circumference, the stop plate mounted in the enlarged diameter wall portion of the housing defining at least one fluid passage therein, the fluid passage being between the outer circumference of the stop plate and the enlarged diameter wall portion of the inner wall.
Claim 3
Dependent Claim
29 words
A measuring apparatus as claimed in claim 1, wherein four passages are provided between said plate and the enlarged diameter wall portion of the inner wall of said housing.
Claim 4
Dependent Claim
37 words
A measuring apparatus as claimed in claim 1, wherein the enlarged diameter wall portion of said inner wall of said housing is provided with a plurality of inwards directed projections against which said stop plate is clamped.
Claim 5
Dependent Claim
26 words
A measuring apparatus as claimed in claim 1, wherein said stop plate is provided with a centre pin at its side directed away from said rotor.
Claim 6
Dependent Claim
33 words
A measuring apparatus as claimed in claim 1, wherein said stop plate is provided, at its side directed away from said rotor, with a bulge for directing the circulating fluid towards said passages.
Claim 7
Dependent Claim
30 words
A measuring apparatus as claimed in claim 5, wherein said bulge presents a longitudinal section in the shape of a triangle, the base of which coincides with said stop plate.
Claim 8
Dependent Claim
40 words
A measuring apparatus as claimed in claim 5, wherein said bulge presents a longitudinal section in the shape of a triangle, the base of which coincides with a side of a rectangle, which rectangle is jointed to said stop plate.
Claim 9
Dependent Claim
36 words
A measuring apparatus as claimed in claim 5, wherein said bulge presents a longitudinal section in the shape of a substantially triangular body with two concave sides and a base coinciding with said stop plate. PG,15
Claim 10
Dependent Claim
18 words
A measuring apparatus as claimed in claim 5, wherein said bulge is rectangular, according to a longitudinal section.
Claim 11
Dependent Claim
29 words
A measuring apparatus as claimed in claim 5, wherein said bulge presents a dome-shaped body comprising a surface of several interconnected planes extending to cover said stop plate side.
Claim 12
Dependent Claim
13 words
A measuring apparatus as claimed in claim 5, wherein said bulge is aspherical.
Claim 13
Dependent Claim
58 words
A measuring apparatus as claimed in claim 1, wherein said jet activating elements are formed by a series of triangles which are integrally located on the shoulder of said housing, the adjoining sides of two adjoining triangles are parallel and are directed in such a manner to impart a whirl motion to the fluid passing between said sides.
Claim 14
Dependent Claim
43 words
A measuring apparatus as claimed in claim 1, wherein said jet propulsion activating elements are formed by at least two triangles with curved sides, two adjoining sides of two adjoining triangles defining an arched passage of constant section for the fluid flowing through.
Claim 15
Dependent Claim
71 words
A measuring apparatus as claimed in claim 1, wherein said jet propulsion activating elements are formed by at least two locally curved elements, two adjoining sides of two adjoining elements are parallel to each other over a certain distance and form a straight passage for the fluid over said distance, one of said two sides being curved after said straight passage for deflecting the fluid which entered through said straight passage.
Claim 16
Dependent Claim
39 words
A measuring apparatus as claimed in claim 1, wherein said jet propulsion activating elements are formed by at least two arched elements, in such a manner that between two adjoining elements a wedge-shaped passage with straight sides is formed.
Claim 17
Dependent Claim
41 words
A measuring apparatus as claimed in claim 1, wherein said jet propulsion activating elements are formed by at least two arched elements, in such a manner that between two adjoining elements, a curved passage having a progressively reduced section, is formed.
Claim 18
Dependent Claim
46 words
A measuring apparatus as claimed in claim 1, wherein said rotor comprises a shaft, the ends of which are received in conically milled openings provided therefor in a little bridge formed integrally with the narrower diameter wall portion of the housing and in said stop plate.
Claim 19
Dependent Claim
36 words
A measuring apparatus as claimed in claim 1, wherein said stop plate is provided, at its side facing the rotor, with a relief, the thickness of which influences the flow characteristics of the fluid flowing through.
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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) | 1996-07-12 | 1997-01-11 | 1997-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-07-12 | 2001-01-11 | 2001-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-07-12 | 2005-01-11 | 2005-07-13 | $7700.00 | Window Closed / Lapsed |