Patent US4406561A successfully refreshed from Google Patents.
US4406561A
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US
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Sucker rod assembly
Assignee: NATIONAL SET SCREW CORP
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Filing: 1981-09-02
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Granted: 1983-09-27
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Expires: 2001-09-02
Abstract
Abstract A sucker rod assembly is disclosed for use in oil well pumping apparatus. The assembly comprises a rod with roll-formed threads on the end thereof and a rod-end fitting with a threaded socket for receiving the threaded rod. An unthreaded portion on the outer end of the socket is extruded into surface engagement with the unthreaded surface of the rod to seal and mechanically interlock the rod and fitting.
Inventors
- 👤 Peter D. Ewing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:27
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/02; E21B17/04; E21B17/042; E21B17/0426; F; F16; F16D; F16D1/00; F16D1/02; F16B; F16B2200/00; F16B2200/10; Y; Y10; Y10T; Y10T403/00; Y10T403/49; Y10T403/4983
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
172 words
A sucker rod assembly comprising: a rod with threads on one end with an unthreaded adjoining portion of uniform diameter, a rod-end fitting comprising a unitary metal body including a tool receiving shank, a first connector portion at one end of said shank and a second connector portion at the other end of said shank, said first connector portion comprising a cylindrical socket having a threaded portion adjacent the bottom of said socket and an unthreaded portion adjacent the outer end of said socket, said threaded end of said rod being threadedly engaged with the threaded portion of said socket, the threads on the end of said rod having a major diameter greater than the diameter of said adjoining portion of said rod and terminating adjacent the inner end of said unthreaded portion of said socket disposed in uninterrupted surface engagement with the surface of the unthreaded adjoining portion of said rod, whereby said rod and rod-end fitting are mechanically interlocked and the uninterrupted surface engagement seals the threads inside said socket.
Claim 2
Dependent Claim
172 words
A sucker rod assembly comprising: a rod with threads on one end with an unthreaded adjoining portion of uniform diameter, a rod-end fitting comprising a unitary metal body including a tool receiving shank, a first connector portion at one end of said shank and a second connector portion at the other end of said shank, said first connector portion comprising a cylindrical socket having a threaded portion adjacent the bottom of said socket and an unthreaded portion adjacent the outer end of said socket, said threaded end of said rod being threadedly engaged with the threaded portion of said socket, the threads on the end of said rod having a major diameter greater than the diameter of said adjoining portion of said rod and terminating adjacent the inner end of said unthreaded portion of said socket disposed in uninterrupted surface engagement with the surface of the unthreaded adjoining portion of said rod, whereby said rod and rod-end fitting are mechanically interlocked and the uninterrupted surface engagement seals the threads inside said socket.
Claim 3
Dependent Claim
16 words
The invention as defined in claim 1 wherein the second connector portion comprises a threaded pin.
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) | 1986-09-26 | 1987-03-28 | 1987-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-09-26 | 1991-03-28 | 1991-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-09-26 | 1995-03-28 | 1995-09-27 | $7700.00 | Window Closed / Lapsed |