Patent US3912426A successfully refreshed from Google Patents.
US3912426A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Segmented stator for progressive cavity transducer
Assignee: Smith International Inc
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Filing: 1974-01-15
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Granted: 1975-10-14
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Expires: 1994-01-15
Abstract
Abstract This invention relates to progressing cavity fluid motors with multiple segmented stator elements connected in series to provide a fluid passageway from the input to initial stator of the series to the terminal stator of the series; the rotor elements in each stator are connected together for simultaneous rotation.
Inventors
- 👤 John E Tschirky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:23
CPC Classifications
F; F04; F04C; F04C2/00; F04C2/08; F04C2/10; F04C2/107; F04C2/1071; F04C2/1073; F04C2/1075; E; E21; E21B; E21B4/00; E21B4/02; F01; F01C; F01C1/00; F01C1/08; F01C1/10; F01C1/101
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
167 words
A progressing cavity fluid transducer assembly comprising a plurality of separate stator elements, said assembly having a vertical axis, an internal helical groove in the internal surface of said stator elements, said separate stator element having cooperating surfaces formed with at least one projection and recess with respect to a plane perpendicular to the said vertical axis to register said separate stator elements and means to connect the output end of one of said stator elements with the input end of a succeeding stator element in series into a continuous fluid passageway, a helical rotor element extending through said series of stator elements, a fluid flow connection to the first of said stator elements in said series, a fluid flow connection to the last of said stator elements in said series, the pitch of said stator groove (Ps) being twice the pitch of the rotor (Pr), and in which each of said rotor elements adapted to move in a rotary and eccentric motion in the stator elements.
Claim 2
Dependent Claim
167 words
A progressing cavity fluid transducer assembly comprising a plurality of separate stator elements, said assembly having a vertical axis, an internal helical groove in the internal surface of said stator elements, said separate stator element having cooperating surfaces formed with at least one projection and recess with respect to a plane perpendicular to the said vertical axis to register said separate stator elements and means to connect the output end of one of said stator elements with the input end of a succeeding stator element in series into a continuous fluid passageway, a helical rotor element extending through said series of stator elements, a fluid flow connection to the first of said stator elements in said series, a fluid flow connection to the last of said stator elements in said series, the pitch of said stator groove (Ps) being twice the pitch of the rotor (Pr), and in which each of said rotor elements adapted to move in a rotary and eccentric motion in the stator elements.
Claim 3
Dependent Claim
42 words
In the transducer of claim 1, the cross-section of each stator being a bifoil and the major axis of the bifoils at the terminal ends of adjacent stator elements being substantially parallel and means to hold the said stators in said series.
Claim 4
Dependent Claim
72 words
The transducer of claim 1 in which the cross-section of each stator element has a bifoil opening and said projections and recesses comprise a dove-tail ring and notch in the co-operating surfaces, said dove-tail ring and notch being oriented with respect of the major axes of the bifoils in the co-operating surfaces of the adjacent stator elements to position the major axes of the bifoil openings in the co-operating surfaces substantially parallel.
Claim 5
Dependent Claim
82 words
The transducer of claim 1 in which the cross-section of each stator element has a bifoil opening and the terminal ends of adjacent stators are on a plane at an acute angle to the vertical axis of said assembly, a portion of said terminal ends projecting above said perpendicular plane and a portion of said terminal ends projecting below the said perpendicular plane to register said separate stator elements with the major axes of the bifoils in the co-operating surfaces substantially parallel.
Claim 6
Dependent Claim
71 words
In the transducer of claim 1, in which the helical rotors have a circular cross-section and in which in each of the stator-rotor elements the product of the diameter (D) of the cross-section of the rotor, the eccentricity (E) of rotor motion in the stator-rotor combinations, and the pitch of the stator grooves (Ps), to wit, (D X E X Ps) being substantially the same in each of the stator-rotor elements.
Claim 7
Dependent Claim
42 words
In the transducer of claim 5, the cross-section of each stator being a bifoil and the major axis of the bifoils at the terminal ends of adjacent stator elements being substantially parallel and means to hold the said stators in said series.
Claim 8
Dependent Claim
32 words
In the transducer of claim 5 in which the pitch (Ps) and the diameter (D) and the eccentricity (E) in each of the stator elements in said series are all substantially equal.
Claim 9
Dependent Claim
23 words
In the transducer of claim 5 in which the eccentricity of the rotor motion (E) in each stator element is substantially the same.
Claim 10
Dependent Claim
41 words
In the transducer of claim 8, the cross-section of each stator being a bifoil and the major axis of the bifoils at adjacent ends of said stator elements being substantially parallel and means to hold the said stators in said series.
Claim 11
Dependent Claim
28 words
In the transducer of claim 5 in which the pitch (Ps) of the stator grooves in each of the stator elements in said series are all substantially equal.
Claim 12
Dependent Claim
28 words
In the transducer of claim 10, the cross-section of each stator being a bifoil and the major axis of the bifoils at adjacent ends of said stator elements
Claim 13
Dependent Claim
24 words
In the transducer of claim 5 in which the diameter of the rotors (D) in each of the stator elements are all substantially equal.
Claim 14
Dependent Claim
42 words
In the transducer of claim 12, the cross-section of each stator element being a bifoil and the major axis of the bifoils at adjacent ends of said stator elements being substantially parallel and means to hold the said stators in said series.
Claim 15
Dependent Claim
83 words
The transducer of claim 1 in which the cross-section of each stator element has a bifoil opening and said projections and recesses including pins mounted in the surface of one of said stator elements and bores in the co-operating surface of the adjacent stator element, said pins and bores being oriented with respect of the major axis of the bifoils in the co-operating surfaces of adjacent stator elements to position the major axes of the bifoil openings in the co-operating surfaces substantially parallel.
Claim 16
Dependent Claim
23 words
In the transducer of claim 14 in which the eccentricity of the rotor motion (E) in each stator element is substantially the same.
Claim 17
Dependent Claim
28 words
In the transducer of claim 14 in which the pitch (Ps) of the stator grooves in each of the stator elements in said series are all substantially equal.
Claim 18
Dependent Claim
71 words
In the transducer of claim 14, in which the helical rotors have a circular cross-section and in which in each of the stator-rotor elements the product of the diameter (D) of the cross-section of the rotor, the eccentricity (E) of rotor motion in the stator-rotor combinations, and the pitch of the stator grooves (Ps), to wit, (D X E X Ps) being substantially the same in each of the stator-rotor elements.
Claim 19
Dependent Claim
24 words
In the transducer of claim 17 in which the diameter of the rotors (D) in each of the stator elements are all substantially equal.
Claim 20
Dependent Claim
23 words
In the transducer of claim 17 in which the diameter (D) and the eccentricity (E) and the pitch (Ps) are all substantially equal.
Claim 21
Dependent Claim
59 words
In the transducer of claim 14, in which the helical rotors have a circular cross-section and in which in each of the stator-rotor elements the diameter (D) of the cross-section of the rotor, the eccentricity (E) of rotor motion in the stator-rotor combination, and the pitch of the stator grooves (Ps) are substantially the same in each stator-rotor element.
Claim 22
Dependent Claim
62 words
In the transducer of claim 20, in which the helical rotors have a circular cross-section and in which in each of the stator-rotor elements the product of the diameter (D) of the cross-section of the rotor, the eccentricity (E) of rotor motion in the stator-rotor combinations, and the pitch of the stators grooveS (Ps) are substantially the same in each rotor-stator element.
Claim 23
Dependent Claim
34 words
The transducer of claim 20 in which the cross-section of each stator element has a bifoil opening and said projections and recesses comprise a dove-tail ring and notch in the co-operating surfaces substantially parallel.
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) | 1978-10-13 | 1979-04-14 | 1979-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-13 | 1983-04-14 | 1983-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-13 | 1987-04-14 | 1987-10-14 | $7700.00 | Window Closed / Lapsed |