US3936247A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Floating flow restrictors for fluid motors
Assignee: Halliburton Co
•
Filing: 1975-01-27
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Granted: 1976-02-03
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Expires: 1995-01-27
Abstract
Abstract This invention relates to flow restrictors in fluid motors where the operating fluid also passes through the bearings of the motor.
Inventors
- 👤 John E. Tschirky
- 👤 Gary Monroe Crase
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:12
CPC Classifications
F; F16; F16C; F16C33/00; F16C33/02; F16C33/04; F16C33/043; E; E21; E21B; E21B4/00; E21B4/003; F16C2352/00
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
119 words
A hydraulic motor including a stator in a housing and a rotor in said stator, a shaft connected to said rotor, a fluid inlet to said stator, and a fluid outlet from said stator, a thrust bearing mounted on said shaft and housing, a fluid passageway connected to the fluid outlet from said stator through the housing, a flow restrictor positioned in said passageway between the stator outlet and said thrust bearing, said flow restrictor comprising a first sleeve mounted on said shaft, support means for said first sleeve mounted on said shaft for radial displacement of said sleeve with respect of said shaft, a second sleeve mounted on said housing adjacent to but spaced from said first sleeve.
Claim 2
Dependent Claim
119 words
A hydraulic motor including a stator in a housing and a rotor in said stator, a shaft connected to said rotor, a fluid inlet to said stator, and a fluid outlet from said stator, a thrust bearing mounted on said shaft and housing, a fluid passageway connected to the fluid outlet from said stator through the housing, a flow restrictor positioned in said passageway between the stator outlet and said thrust bearing, said flow restrictor comprising a first sleeve mounted on said shaft, support means for said first sleeve mounted on said shaft for radial displacement of said sleeve with respect of said shaft, a second sleeve mounted on said housing adjacent to but spaced from said first sleeve.
Claim 3
Dependent Claim
78 words
The motor of claim 1, said support means for said sleeve including a first support ring mounted on said shaft, a first pair of rings mounted between one end of said sleeve and said first support ring, a second support ring mounted on said shaft, a second pair of rings mounted between said sleeve and said second support ring at the other end of said sleeve, the rings of each of said pairs slidably mounted over each other.
Claim 4
Dependent Claim
38 words
The motor of claim 1, in which the mounting of the first sleeve includes a first ring mounted on the shaft at one end of said sleeve, said first sleeve mounted in sliding relation to said first ring.
Claim 5
Dependent Claim
31 words
The motor of claim 3, said support means including a second ring mounted on said shaft at the other end of said first sleeve in sliding relation to said first sleeve.
Claim 6
Dependent Claim
23 words
The motor of claim 2, in which the other end of said first sleeve is connected to said shaft by a flexible boot.
Claim 7
Dependent Claim
27 words
The motor of claim 1, in which the facing surfaces of said sleeves are formed of hard material having a Knoop hardness in excess of about 2,000.
Claim 8
Dependent Claim
13 words
The motor of claim 6, in which the hard material is tungsten carbide.
Claim 9
Dependent Claim
39 words
The motor of claim 6, in which the mounting of the first sleeve includes a first ring mounted on said shaft at one end of said first sleeve, said first sleeve mounted in sliding relation to said first ring.
Claim 10
Dependent Claim
22 words
The motor of claim 8, in which said ring is made of hard material having a Knoop hardness in excess of 2,000.
Claim 11
Dependent Claim
15 words
The motor of claim 8, in which the material of said ring is tungsten carbide.
Claim 12
Dependent Claim
31 words
The motor of claim 8, said support means including a second ring mounted on said shaft at the other end of said first sleeve in sliding relation with said first sleeve.
Claim 13
Dependent Claim
21 words
Motor of claim 11, in which said rings are made of hard material having a Knoop hardness in excess of 2,000.
Claim 14
Dependent Claim
15 words
The motor of claim 11, in which the material of said rings is tungsten carbide.
Claim 15
Dependent Claim
23 words
The motor of claim 8, in which the other end of said first sleeve is connected to said shaft by a flexible boot.
Claim 16
Dependent Claim
22 words
The motor of claim 14, in which said ring is made of hard material having a Knoop hardness in excess of 2,000.
Claim 17
Dependent Claim
13 words
The motor of claim 15, in which the hard material is tungsten carbide.
Claim 18
Dependent Claim
78 words
The motor of claim 6, said support means for said sleeve including a first support ring mounted on said shaft, a first pair of rings mounted between one end of said sleeve and said first support ring, a second support ring mounted on said shaft, a second pair of rings mounted between said sleeve and said second support ring at the other end of said sleeve, the rings of each of said pairs slidably mounted over each other.
Claim 19
Dependent Claim
22 words
The motor of claim 17, in which said rings are made of hard material having a Knoop hardness in excess of 2,000.
Claim 20
Dependent Claim
13 words
The motor of claim 18, in which the hard material is tungsten carbide.
References Cited (Backward Citations)
US2308316A
Cited
GB781860A
Cited
US3112801A
Cited
US3489231A
Cited
US3516718A
Cited
US3456746A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-02-02 | 1979-08-04 | 1980-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-02 | 1983-08-04 | 1984-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-02 | 1987-08-04 | 1988-02-03 | $7700.00 | Window Closed / Lapsed |