US4443165A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Moineau pump with helicoidal coupling sleeve
Assignee: Societe Generale de Mecanique et de Metallurgie
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Filing: 1982-01-12
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Granted: 1984-04-17
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Expires: 2002-01-12
Abstract
Abstract The invention relates to improvements in or to Moineau pumps comprising a stator having an axial cavity, a helicoidal rotor adapted to rotate in said cavity of the stator by cooperating with it and coupling means to couple the rotor to another driving or driven rotary member. The helicoidal rotor projects axially out of the stator and the coupling means comprise a rigid and elongated coupling sleeve, hollowed by an axial housing of which the shape is complementary to that of the helix of the rotor, said sleeve being engaged on and gripping the end of the rotor projecting out of the stator.
Inventors
- 👤 Edmond Chanton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:34
CPC Classifications
F; F16; F16D; F16D1/00; F16D1/06; F16D1/08; F16D1/0852; F16D1/0864; F04; F04C; F04C15/00; F04C15/0057; F04C15/0076; F04C2/00; F04C2/08; F04C2/10; F04C2/107; F04C2/1071; F04C2/1073; Y; Y10; Y10T; Y10T403/00; Y10T403/57; Y10T403/5706; Y10T403/5713; Y10T403/5761; Y10T403/5786
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
100 words
In a Moineau gear pump comprising a stator having an axial cavity, a helicoidal rotor axially extending inside said cavity of the stator, and coupling means to couple the rotor to another driving or driven rotary member, the improvement wherein the helicoidal rotor projects axially out of said cavity of the stator and wherein the coupling means comprises a rigid and elongated coupling sleeve provided with an axial hollow whose shape is complementary to that of the helix of the rotor, said sleeve being engaged on and gripping the end of the rotor projecting from said cavity of the stator.
Claim 2
Dependent Claim
100 words
In a Moineau gear pump comprising a stator having an axial cavity, a helicoidal rotor axially extending inside said cavity of the stator, and coupling means to couple the rotor to another driving or driven rotary member, the improvement wherein the helicoidal rotor projects axially out of said cavity of the stator and wherein the coupling means comprises a rigid and elongated coupling sleeve provided with an axial hollow whose shape is complementary to that of the helix of the rotor, said sleeve being engaged on and gripping the end of the rotor projecting from said cavity of the stator.
Claim 3
Dependent Claim
62 words
Gear pump according to claim 1, wherein the sleeve is provided with a slot extending radially between the axial hollow of said sleeve and the outer lateral surface of said sleeve, and wherein there are provided clamping means tending to bring together the two surfaces which bound said slot so as to grip the sleeve elastically around said end of the rotor.
Claim 4
Dependent Claim
21 words
Gear pump according to claim 1, wherein the sleeve extends over at least one pitch of the helix of the rotor.
Claim 5
Dependent Claim
44 words
Gear pump according to claim 1, wherein the axial hollow of the coupling sleeve is obturated by a front wall on the side of the free end of the latter, and wherein the end of the rotor is in abutment against said front wall.
Claim 6
Dependent Claim
27 words
Gear pump according to claim 1, wherein supplementary connecting means are provided to make fast to one another the end of the rotor and the coupling sleeve.
Claim 7
Dependent Claim
57 words
Gear pump according to claim 4, wherein supplementary connecting means are provided to make fast to one another the end of the rotor and the coupling sleeve, said supplementary connecting means comprising at least one screw passing through the sleeve end front wall and screwed axially into the end of the rotor in abutment against the wall.
Claim 8
Dependent Claim
23 words
Gear pump according to claim 1, wherein the sleeve forms an integral part of a coupling device, particularly of a cardan coupling device.
Claim 9
Dependent Claim
11 words
Gear pump according to claim 1, wherein the sleeve is metallic.
References Cited (Backward Citations)
GB250223A
Cited
US2028407A
Cited
US2739650A
Cited
FR1275697A
Cited
DE2215476A1
Cited
US3879147A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-04-17 | 1987-10-17 | 1988-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-17 | 1991-10-17 | 1992-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-17 | 1995-10-17 | 1996-04-17 | $7700.00 | Window Closed / Lapsed |