US4056977A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Swirler for a fluid flowmeter and method of making same
Assignee: Old Carco LLC
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Filing: 1976-04-29
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Granted: 1977-11-08
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Expires: 1996-04-29
Abstract
Abstract A swirler for a fluid flowmeter comprises a plurality of axially and circumferentially overlapping swirl blades within a flow conduit which impart a swirling motion to fluid passing therethrough. The swirler is constructed of a first element containing selected ones of said blades which are circumferentially non-overlapping and a second element containing the remaining blades which are also circumferentially non-overlapping; the two elements are assembled so as to bring the blades of each element into overlapping relationship with those of the other element.
Inventors
- 👤 Leonard P. Gau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:19
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/05; G01F1/20; G01F1/32; G01F1/3236; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49316; Y10T29/4932; Y10T29/49321; Y10T29/49826; Y10T29/49879
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
154 words
In a fluid swirler or like device comprising a plurality of blades which are both axially and circumferentially overlapping, the combination of: a first element containing selected ones of said blades which are circumferentially non-overlapping; and a second element containing other selected ones of said blades which are circumferentially non-overlapping; said two elements being assembled such that at least one blade of one of said elements circumferentially and axially overlaps a blade of the other of said elements; said first element including a central hub joining radially inner peripheral edge portions of the blades thereof and an integral ring joining outer peripheral edge portions of the blades thereof, said second element comprising an integral central hub joining radially inner peripheral edge portions of the blades thereof, said two hubs engaging each other, and including locating slots in said ring and locating tabs on the blades of said second element disposed in said locating slots.
Claim 2
Dependent Claim
154 words
In a fluid swirler or like device comprising a plurality of blades which are both axially and circumferentially overlapping, the combination of: a first element containing selected ones of said blades which are circumferentially non-overlapping; and a second element containing other selected ones of said blades which are circumferentially non-overlapping; said two elements being assembled such that at least one blade of one of said elements circumferentially and axially overlaps a blade of the other of said elements; said first element including a central hub joining radially inner peripheral edge portions of the blades thereof and an integral ring joining outer peripheral edge portions of the blades thereof, said second element comprising an integral central hub joining radially inner peripheral edge portions of the blades thereof, said two hubs engaging each other, and including locating slots in said ring and locating tabs on the blades of said second element disposed in said locating slots.
Claim 3
Dependent Claim
96 words
In a fluid swirler or like device comprising a plurality of swirl blades wherein each blade axially and circumferentially overlaps immediately adjacent blades, the combination of: a first molded plastic element containing selected ones of said blades which are circumferentially non-overlapping; a second molded plastic element containing other selected ones of said blades which are circumferentially non-overlapping; and a locating tab protruding from a blade of one of said two elements into a matching locating slot in the other of said two elements for axially and circumferentially locating said two elements with respect to each other.
Claim 4
Dependent Claim
96 words
In a fluid swirler or like device comprising a plurality of swirl blades wherein each blade axially and circumferentially overlaps immediately adjacent blades, the combination of: a first molded plastic element containing selected ones of said blades which are circumferentially non-overlapping; a second molded plastic element containing other selected ones of said blades which are circumferentially non-overlapping; and a locating tab protruding from a blade of one of said two elements into a matching locating slot in the other of said two elements for axially and circumferentially locating said two elements with respect to each other.
Claim 5
Dependent Claim
23 words
The combination set forth in claim 2 wherein said locating tab protrudes radially from an edge of said blade of said one element.
Claim 6
Dependent Claim
147 words
A fluid swirler or like device having a plurality of swirl blades wherein each blade axially and circumferentially overlaps immediately adjacent blades, and being of two piece construction, comprising: a first molded plastic piece containing selected ones of said blades which are circumferentially non-overlapping, a central hub joining radially inner peripheral edge portions of said selected ones of said blades, and an outer ring joining radially outer peripheral edge portions of said selected ones of said blades; and a second molded plastic piece containing other selected ones of said blades which are circumferentially non-overlapping, and a central hub joining radially inner peripheral edge portions of said other selected ones of said blades, said other selected ones of said blades having portions thereof extending axially forwardly beyond the central hub of their own piece and and being disposed between the ring and the hub of said first piece.
Claim 7
Dependent Claim
147 words
A fluid swirler or like device having a plurality of swirl blades wherein each blade axially and circumferentially overlaps immediately adjacent blades, and being of two piece construction, comprising: a first molded plastic piece containing selected ones of said blades which are circumferentially non-overlapping, a central hub joining radially inner peripheral edge portions of said selected ones of said blades, and an outer ring joining radially outer peripheral edge portions of said selected ones of said blades; and a second molded plastic piece containing other selected ones of said blades which are circumferentially non-overlapping, and a central hub joining radially inner peripheral edge portions of said other selected ones of said blades, said other selected ones of said blades having portions thereof extending axially forwardly beyond the central hub of their own piece and and being disposed between the ring and the hub of said first piece.
Claim 8
Dependent Claim
40 words
A fluid swirler or like device as set forth in claim 4 wherein each blade of each piece comprises a planar first blade section disposed in a radial plane and a second blade section extending from the first blade section.
Claim 9
Dependent Claim
29 words
A fluid swirler or like device as set forth in claim 4 wherein the blades of said two pieces are uniformly circumferentially arranged about the axis of the swirler.
Claim 10
Dependent Claim
20 words
A fluid swirler or like device as set forth in claim 4 wherein all blades are of substantially identical shape.
Claim 11
Dependent Claim
30 words
A fluid swirler or like device as set forth in claim 4 wherein the central hubs of said first and second pieces are disposed in axial abutment with each other.
Claim 12
Dependent Claim
57 words
A fluid swirler or like device as set forth in claim 4 wherein a locating tab projects radially outwardly from an edge of a blade of said second piece and is disposed within a locating slot provided in the ring of said first piece for axially and circumferentially locating the two pieces with respect to each other.
Claim 13
Dependent Claim
173 words
A fluid swirler or like device having a plurality of swirl blades wherein each blade axially and circumferentially overlaps immediately adjacent blades, and being of two piece construction, comprising: a first molded plastic piece containing selected ones of said blades which are circumferentially non-overlapping, and a central hub joining radially inner peripheral edge portions of said selected ones of said blades, said selected ones of said blades having portions thereof extending axially rearwardly beyond the hub of their own piece; and a second molded plastic piece containing other selected ones of said blades which are circumferentially non-overlapping, and a central hub joining radially inner peripheral edge portions of said other selected ones of said blades, said other selected ones of said blades having portions thereof extending axially forwardly beyond the hub of their own piece to be disposed axially overlapping and radially outwardly of the hub of said first piece, said portions of said selected ones of said blades being disposed axially overlapping and radially outwardly of the hub of said second piece.
Claim 14
Dependent Claim
173 words
A fluid swirler or like device having a plurality of swirl blades wherein each blade axially and circumferentially overlaps immediately adjacent blades, and being of two piece construction, comprising: a first molded plastic piece containing selected ones of said blades which are circumferentially non-overlapping, and a central hub joining radially inner peripheral edge portions of said selected ones of said blades, said selected ones of said blades having portions thereof extending axially rearwardly beyond the hub of their own piece; and a second molded plastic piece containing other selected ones of said blades which are circumferentially non-overlapping, and a central hub joining radially inner peripheral edge portions of said other selected ones of said blades, said other selected ones of said blades having portions thereof extending axially forwardly beyond the hub of their own piece to be disposed axially overlapping and radially outwardly of the hub of said first piece, said portions of said selected ones of said blades being disposed axially overlapping and radially outwardly of the hub of said second piece.
Claim 15
Dependent Claim
28 words
A fluid swirler or like device as set forth in claim 10 wherein the central hubs of the two pieces are disposed in axial abutment with each other.
Claim 16
Dependent Claim
28 words
A fluid swirler or like device as set forth in claim 10 wherein the central hubs of the two pieces are disposed in axial alignment with each other.
Claim 17
Dependent Claim
58 words
A fluid swirler or like device as set forth in claim 10 wherein said first piece includes a ring joining radially outer peripheral edge portions of the blades of said first piece and the axially forwardly extending portions of the blades of said second piece are disposed radially between the ring and the hub of said first piece.
Claim 18
Independent Claim
187 words
The method of making, from only two pieces, a fluid swirler or like device having a plurality of swirl blades wherein each blade axially and circumferentially overlaps immediately adjacent blades comprising: molding a first plastic piece containing selected ones of said blades which are circumferentially non-overlapping, a central hub joining radially inner peripheral edge portions of said selected ones of said blades, and an outer ring joining radially outer peripheral edge portions of said selected ones of said blades; molding a second plastic piece containing other selected ones of said blades which are circumferentially non-overlapping and a central hub joining radially inner peripheral edge portions of said other selected ones of said blades with said other selected ones of said blades having portions thereof extending axially forwardly beyond the hub of their own piece; and then assembling the two pieces by positioning one axially of the other, and then axially and circumferentially moving them toward each other to interdigitate the blades thereof and dispose the axially forwardly extending portions of said other selected ones of said blades between the hub and the ring of said first piece.
Claim 19
Independent Claim
187 words
The method of making, from only two pieces, a fluid swirler or like device having a plurality of swirl blades wherein each blade axially and circumferentially overlaps immediately adjacent blades comprising: molding a first plastic piece containing selected ones of said blades which are circumferentially non-overlapping, a central hub joining radially inner peripheral edge portions of said selected ones of said blades, and an outer ring joining radially outer peripheral edge portions of said selected ones of said blades; molding a second plastic piece containing other selected ones of said blades which are circumferentially non-overlapping and a central hub joining radially inner peripheral edge portions of said other selected ones of said blades with said other selected ones of said blades having portions thereof extending axially forwardly beyond the hub of their own piece; and then assembling the two pieces by positioning one axially of the other, and then axially and circumferentially moving them toward each other to interdigitate the blades thereof and dispose the axially forwardly extending portions of said other selected ones of said blades between the hub and the ring of said first piece.
Claim 20
Dependent Claim
49 words
The method as set forth in claim 14 including the step of locating the two pieces both axially and circumferentially with respect to each other by disposing a locating tab on a blade of said second piece within a matching locating slot in the ring of said first piece.
Claim 21
Dependent Claim
28 words
The new method as set forth in claim 14 including the step of permanently joining the two pieces in assembled position after the last-mentioned step has been completed.
Claim 22
Independent Claim
218 words
The method of making, from only two pieces, a fluid swirler or like device having a plurality of swirl blades wherein each blade axially and circumferentially overlaps immediately adjacent blades comprising: molding a first plastic piece containing selected ones of said blades which are circumferentially non-overlapping, and a central hub joining radially inner peripheral edge portions of said selected ones of said blades with said selected ones of said blades having portions thereof extending axially rearwardly beyond said central hub; molding a second plastic piece containing other selected ones of said blades which are circumferentially non-overlapping, and a central hub joining radially inner peripheral edge portions of said other selected ones of said blades with said other selected ones of said blades having portions thereof extending axially forwardly beyond the central hub of their own piece; and then assembling the two pieces by positioning one axially of the other, and then axially and circumferentially moving them toward each other to interdigitate the blades thereof and dispose the axially forwardly extending portions of said other selected ones of said blades axially overlapping and radially outwardly of the hub of said first piece and also dispose the axially rearwardly extending portions of said selected ones of said blades axially overlapping and radially outwardly of the hub of said second piece.
Claim 23
Independent Claim
218 words
The method of making, from only two pieces, a fluid swirler or like device having a plurality of swirl blades wherein each blade axially and circumferentially overlaps immediately adjacent blades comprising: molding a first plastic piece containing selected ones of said blades which are circumferentially non-overlapping, and a central hub joining radially inner peripheral edge portions of said selected ones of said blades with said selected ones of said blades having portions thereof extending axially rearwardly beyond said central hub; molding a second plastic piece containing other selected ones of said blades which are circumferentially non-overlapping, and a central hub joining radially inner peripheral edge portions of said other selected ones of said blades with said other selected ones of said blades having portions thereof extending axially forwardly beyond the central hub of their own piece; and then assembling the two pieces by positioning one axially of the other, and then axially and circumferentially moving them toward each other to interdigitate the blades thereof and dispose the axially forwardly extending portions of said other selected ones of said blades axially overlapping and radially outwardly of the hub of said first piece and also dispose the axially rearwardly extending portions of said selected ones of said blades axially overlapping and radially outwardly of the hub of said second piece.
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) | 1980-11-07 | 1981-05-09 | 1981-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-07 | 1985-05-09 | 1985-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-07 | 1989-05-09 | 1989-11-08 | $7700.00 | Window Closed / Lapsed |