US4676725A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Moineau type gear mechanism with resilient sleeve
Assignee: Baker Hughes Holdings LLC
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Filing: 1985-12-27
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Granted: 1987-06-30
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Expires: 2005-12-27
Abstract
Abstract A gear mechanism, of the Moineau type, having an outer gear member with a helical inner surface. The motor also has a helical inner gear member within the outer member. A resilient sleeve is located between the inner and outer gear members, and has helical inner and outer surfaces. The inner gear member has one less helical thread than the inner surface of the resilient sleeve. The outer surface of the resilient sleeve is similar to, but rotationally offset from, the inner surface of the resilient sleeve.
Inventors
- 👤 Jay M. Eppink
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:36
CPC Classifications
F; F04; F04C; F04C2/00; F04C2/08; F04C2/10; F04C2/107; F04C2/1071; F04C2/1073; E; E21; E21B; E21B4/00; E21B4/02
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
112 words
A gear mechanism, comprising: an outer gear member, having a helical inner surface; a helical inner gear member, within the outer gear member; and a resilient sleeve, between the inner gear member and the outer gear member, having a helical outer surface and a helical inner surface; wherein the helical inner gear member has one less helical thread than the helical inner surface of the sleeve; wherein the cross section of the outer surface of the sleeve is similar to the inner surface of the sleeve; and wherein the helical outer surface of the sleeve is rotationally offset from the inner surface of the sleeve for the entire length of the sleeve.
Claim 2
Dependent Claim
112 words
A gear mechanism, comprising: an outer gear member, having a helical inner surface; a helical inner gear member, within the outer gear member; and a resilient sleeve, between the inner gear member and the outer gear member, having a helical outer surface and a helical inner surface; wherein the helical inner gear member has one less helical thread than the helical inner surface of the sleeve; wherein the cross section of the outer surface of the sleeve is similar to the inner surface of the sleeve; and wherein the helical outer surface of the sleeve is rotationally offset from the inner surface of the sleeve for the entire length of the sleeve.
Claim 3
Dependent Claim
144 words
A gear mechanism, comprising: an outer gear member, having a helical inner surface, with two lobes, so that a cross section of the inner surface of the outer gear member is generally oval and has a longitudinal axis; a helical inner gear member, within the outer gear member, wherein the inner gear member has a circular cross section; and a resilient sleeve, between the inner gear member and the outer gear member, having a helical outer surface and a helical inner surface, wherein the cross section of the inner and outer surfaces of the sleeve are generally oval and have longitudinal axes; wherein the longitudinal axis of the cross section of the inner surface of the outer gear member is rotationally offset from the longitudinal axis of the cross section of the inner surface of the sleeve for the entire length of the sleeve.
Claim 4
Dependent Claim
144 words
A gear mechanism, comprising: an outer gear member, having a helical inner surface, with two lobes, so that a cross section of the inner surface of the outer gear member is generally oval and has a longitudinal axis; a helical inner gear member, within the outer gear member, wherein the inner gear member has a circular cross section; and a resilient sleeve, between the inner gear member and the outer gear member, having a helical outer surface and a helical inner surface, wherein the cross section of the inner and outer surfaces of the sleeve are generally oval and have longitudinal axes; wherein the longitudinal axis of the cross section of the inner surface of the outer gear member is rotationally offset from the longitudinal axis of the cross section of the inner surface of the sleeve for the entire length of the sleeve.
Claim 5
Dependent Claim
100 words
A gear mechanism, comprising: a stator, having a helical inner surface; a helical rotor, within the stator; and a resilient sleeve, between the rotor and the stator, having a helical outer surface and a helical inner surface; wherein the helical rotor has one less helical thread than the helical inner surface of the sleeve; wherein the cross section of the outer surface of the sleeve is similar to the inner surface of the sleeve; and wherein the helical outer surface of the sleeve is rotationally offset from the inner surface of the sleeve from the entire length of the sleeve.
Claim 6
Dependent Claim
100 words
A gear mechanism, comprising: a stator, having a helical inner surface; a helical rotor, within the stator; and a resilient sleeve, between the rotor and the stator, having a helical outer surface and a helical inner surface; wherein the helical rotor has one less helical thread than the helical inner surface of the sleeve; wherein the cross section of the outer surface of the sleeve is similar to the inner surface of the sleeve; and wherein the helical outer surface of the sleeve is rotationally offset from the inner surface of the sleeve from the entire length of the sleeve.
Claim 7
Dependent Claim
128 words
A gear mechanism, comprising: a stator, having a helical inner surface, with two lobes, so that a cross section of the inner surface of the stator is generally oval and has a longitudinal axis; a helical rotor, within the stator, wherein the rotor has a circular cross section; and a resilient sleeve, between the rotor and the stator, having a helical outer surface and a helical inner surface, wherein the cross section of the inner and outer surfaces of the sleeve are generally oval and have longitudinal axes; wherein the longitudinal axis of the cross section of the inner surface of the stator is rotationally offset from the longitudinal axis of the cross section of the inner surface of the sleeve for the entire length of the sleeve.
Claim 8
Dependent Claim
128 words
A gear mechanism, comprising: a stator, having a helical inner surface, with two lobes, so that a cross section of the inner surface of the stator is generally oval and has a longitudinal axis; a helical rotor, within the stator, wherein the rotor has a circular cross section; and a resilient sleeve, between the rotor and the stator, having a helical outer surface and a helical inner surface, wherein the cross section of the inner and outer surfaces of the sleeve are generally oval and have longitudinal axes; wherein the longitudinal axis of the cross section of the inner surface of the stator is rotationally offset from the longitudinal axis of the cross section of the inner surface of the sleeve for the entire length of the sleeve.
Claim 9
Dependent Claim
124 words
A gear mechanism, comprising: a cylindrical body; a metal sleeve, within the body, the metal sleeve having a helical inner surface; a helical inner gear member, within the metal sleeve; and a resilient sleeve, between the inner gear member and the metal sleeve, having a helical outer surface and a helical inner surface; wherein the helical inner gear member has one less helical thread than the helical inner surface of the resilient sleeve; wherein the cross section of the outer surface of the resilient sleeve is similar to the inner surface of the resilient sleeve; and wherein the helical outer surface of the resilient sleeve is rotationally offset from the inner surface of the resilient sleeve for the entire length of the resilient sleeve.
Claim 10
Dependent Claim
124 words
A gear mechanism, comprising: a cylindrical body; a metal sleeve, within the body, the metal sleeve having a helical inner surface; a helical inner gear member, within the metal sleeve; and a resilient sleeve, between the inner gear member and the metal sleeve, having a helical outer surface and a helical inner surface; wherein the helical inner gear member has one less helical thread than the helical inner surface of the resilient sleeve; wherein the cross section of the outer surface of the resilient sleeve is similar to the inner surface of the resilient sleeve; and wherein the helical outer surface of the resilient sleeve is rotationally offset from the inner surface of the resilient sleeve for the entire length of the resilient sleeve.
Claim 11
Dependent Claim
151 words
A gear mechanism, comprising: a cylindrical body; a metal sleeve, within the body, the metal sleeve having a helical inner surface, with two lobes, so that a cross section of the inner surface of the metal sleeve is generally oval and has a longitudinal axis; a helical inner gear member, within the metal sleeve, wherein the inner gear member has a circular cross section; and a resilient sleeve, between the inner gear member and the metal sleeve, having a helical outer surface and a helical inner surface, wherein the cross section of the inner and outer surfaces of the resilient sleeve are generally oval and have longitudinal axes; wherein the longitudinal axis of the cross section of the inner surface of the metal sleeve is rotationally offset from the longitudinal axis of the cross section of the inner surface of the resilient sleeve for the entire length of the resilient sleeve.
Claim 12
Dependent Claim
151 words
A gear mechanism, comprising: a cylindrical body; a metal sleeve, within the body, the metal sleeve having a helical inner surface, with two lobes, so that a cross section of the inner surface of the metal sleeve is generally oval and has a longitudinal axis; a helical inner gear member, within the metal sleeve, wherein the inner gear member has a circular cross section; and a resilient sleeve, between the inner gear member and the metal sleeve, having a helical outer surface and a helical inner surface, wherein the cross section of the inner and outer surfaces of the resilient sleeve are generally oval and have longitudinal axes; wherein the longitudinal axis of the cross section of the inner surface of the metal sleeve is rotationally offset from the longitudinal axis of the cross section of the inner surface of the resilient sleeve for the entire length of the resilient sleeve.
Claim 13
Dependent Claim
118 words
A gear mechanism, comprising: a cylindrical body; a metal sleeve, within the body, the metal sleeve having a helical inner surface; a helical rotor, within the metal sleeve; and a resilient sleeve, between the rotor and the metal sleeve, having a helical outer surface and a helical inner surface; wherein the helical rotor has one less helical thread than the helical inner surface of the resilient sleeve; wherein the cross section of the outer surface of the resilient sleeve is similar to the inner surface of the resilient sleeve; and wherein the helical outer surface of the resilient sleeve is rotationally offset from the inner surface of the resilient sleeve for the entire length of the resilient sleeve.
Claim 14
Dependent Claim
118 words
A gear mechanism, comprising: a cylindrical body; a metal sleeve, within the body, the metal sleeve having a helical inner surface; a helical rotor, within the metal sleeve; and a resilient sleeve, between the rotor and the metal sleeve, having a helical outer surface and a helical inner surface; wherein the helical rotor has one less helical thread than the helical inner surface of the resilient sleeve; wherein the cross section of the outer surface of the resilient sleeve is similar to the inner surface of the resilient sleeve; and wherein the helical outer surface of the resilient sleeve is rotationally offset from the inner surface of the resilient sleeve for the entire length of the resilient sleeve.
Claim 15
Dependent Claim
145 words
A gear mechanism, comprising: a cylindrical body; a metal sleeve, within the body, the metal sleeve having a helical inner surface, with two lobes, so that a cross section of the inner surface of the metal sleeve is generally oval and has a longitudinal axis; a helical rotor, within the metal sleeve, wherein the rotor has a circular cross section; and a resilient sleeve, between the rotor and the metal sleeve, having a helical outer surface and a helical inner surface, wherein the cross section of the inner and outer surfaces of the resilient sleeve are generally oval and have longitudinal axes; wherein the longitudinal axis of the cross section of the inner surface of the metal sleeve is rotationally offset from the longitudinal axis of the cross section of the inner surface of the resilient sleeve for the entire length of the resilient sleeve.
Claim 16
Dependent Claim
145 words
A gear mechanism, comprising: a cylindrical body; a metal sleeve, within the body, the metal sleeve having a helical inner surface, with two lobes, so that a cross section of the inner surface of the metal sleeve is generally oval and has a longitudinal axis; a helical rotor, within the metal sleeve, wherein the rotor has a circular cross section; and a resilient sleeve, between the rotor and the metal sleeve, having a helical outer surface and a helical inner surface, wherein the cross section of the inner and outer surfaces of the resilient sleeve are generally oval and have longitudinal axes; wherein the longitudinal axis of the cross section of the inner surface of the metal sleeve is rotationally offset from the longitudinal axis of the cross section of the inner surface of the resilient sleeve for the entire length of the resilient sleeve.
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) | 1990-06-29 | 1990-12-29 | 1991-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-29 | 1994-12-29 | 1995-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-29 | 1998-12-29 | 1999-06-30 | $7700.00 | Window Closed / Lapsed |