US3982859A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Floating flow restrictors for fluid motors
Assignee: Halliburton Co
•
Filing: 1975-07-11
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Granted: 1976-09-28
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Expires: 1995-07-11
Abstract
Abstract This invention relates to flow restrictors in fluid motors.
Inventors
- 👤 John E. Tschirky
- 👤 Bela A. Geczy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:29
CPC Classifications
F; F03; F03C; F03C2/00; F03C2/08; E; E21; E21B; E21B4/00; E21B4/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
144 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 flexibly mounted at one end of said sleeve on said shaft and spaced radially from said shaft and forming an annular space between said shaft and said first sleeve, a radial bearing mounted at the other end of said first sleeve and between said first sleeve and said housing, a second sleeve mounted on said housing adjacent to but spaced radially from said first sleeve.
Claim 2
Dependent Claim
144 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 flexibly mounted at one end of said sleeve on said shaft and spaced radially from said shaft and forming an annular space between said shaft and said first sleeve, a radial bearing mounted at the other end of said first sleeve and between said first sleeve and said housing, a second sleeve mounted on said housing adjacent to but spaced radially from said first sleeve.
Claim 3
Dependent Claim
29 words
The motor of claim 1, a packing gland mounted on said housing between the ends of said first sleeve, said first sleeve forming a seal fit with said gland.
Claim 4
Dependent Claim
30 words
The motor of claim 1 in which said flexible connection comprising a boot mounted at said one end of said first sleeve and said shaft and closing said annular space.
Claim 5
Dependent Claim
29 words
The motor of claim 3, a packing gland mounted on said housing between the ends of said first sleeve, said first sleeve forming a seal fit with said gland.
Claim 6
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 7
Dependent Claim
29 words
The motor of claim 5, a packing gland mounted on said housing between the ends of said first sleeve, said first sleeve forming a seal fit with said gland.
Claim 8
Dependent Claim
30 words
The motor of claim 5 in which said flexible connection comprising a boot mounted at said one end of said first sleeve and said shaft and closing said annular space.
References Cited (Backward Citations)
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US3112801A
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US3489231A
Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-09-28 | 1980-03-29 | 1980-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-28 | 1984-03-29 | 1984-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-28 | 1988-03-29 | 1988-09-28 | $7700.00 | Window Closed / Lapsed |