US4705062A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Choke and improved needle tip therefor
Assignee: Cooper Industries LLC
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Filing: 1987-02-18
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Granted: 1987-11-10
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Expires: 2007-02-18
Abstract
Abstract The improved choke includes a body with an internal valve chamber, an inlet and an outlet communicating through the body into the valve chamber, a valve seat surrounding the opening of the outlet into the valve chamber, and a valve member mounted within said body to move toward and away from said valve seat to control flow therethrough, means for moving the valve member in said body, the valve member having a stem and a replaceable, wear-resistant tip which is provided with a sleeve insert secured within the stem opening and having internal threads which mate with external threads on the end of the stem, the tip recess includes a groove into which a portion of the sleeve insert is swaged to secure it tightly into the tip.
Inventors
- 👤 Gerald S. Baker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:58
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/32; F16K1/34; F16K1/36; F16K1/38; F16K1/48; F16K1/482; Y; Y10; Y10S; Y10S251/00; Y10S251/903; Y10T; Y10T137/00; Y10T137/598; Y10T137/5983; Y10T137/6065; Y10T137/6069
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
164 words
A choke comprising a body having an internal valve chamber with an inlet and an outlet communicating through the body into the valve chamber, a seat positioned within said valve chamber surrounding the opening of the outlet into the valve chamber, a valve member positioned within said valve chamber and including a stem and a replaceable wear-resistant tip, means connected to said stem to move said stem and said tip toward and away from said seat to control flow therethrough, said stem being threaded on its end for fastening to said tip, said tip having an internal cylindrical recess with an annular groove in the surface of said recess, and a sleeve slidably inserted into said recess and having internal threads mating with the threads on the stem and having a shank, a portion of which is swaged into the groove in said recess to secure said sleeve insert within said recess and the remaining portion of the shank being postioned in said recess.
Claim 2
Dependent Claim
164 words
A choke comprising a body having an internal valve chamber with an inlet and an outlet communicating through the body into the valve chamber, a seat positioned within said valve chamber surrounding the opening of the outlet into the valve chamber, a valve member positioned within said valve chamber and including a stem and a replaceable wear-resistant tip, means connected to said stem to move said stem and said tip toward and away from said seat to control flow therethrough, said stem being threaded on its end for fastening to said tip, said tip having an internal cylindrical recess with an annular groove in the surface of said recess, and a sleeve slidably inserted into said recess and having internal threads mating with the threads on the stem and having a shank, a portion of which is swaged into the groove in said recess to secure said sleeve insert within said recess and the remaining portion of the shank being postioned in said recess.
Claim 3
Dependent Claim
13 words
A choke according to claim 1 wherein said wear-resistant tip is tungsten carbide.
Claim 4
Dependent Claim
23 words
A choke according to claim 1 wherein said sleeve insert includes an outwardly extending flange positioned against the surface surrounding the tip recess.
Claim 5
Dependent Claim
37 words
A choke according to claim 1 wherein said stem includes a radial flange surrounding the threaded end to provide a radially extending annular surface for engaging the surface of said tip surrounding the internal cylindrical recess therein.
Claim 6
Dependent Claim
13 words
A choke according to claim 1 wherein said sleeve insert is stainless steel.
Claim 7
Dependent Claim
64 words
A choke according to claim 1 wherein said sleeve insert includes internal threads extending from one end thereof to a shank portion of said insert and a radially extending flange on the end of the shank portion opposite said threaded portion, a counterbore into said tip to provide a radial surface surrounding said bore, said sleeve flange engaging said radial surface surrounding said bore.
Claim 8
Dependent Claim
100 words
A replaceable choke tip comprising a tip body having an exterior surface adapted to coact to control flow through a choke, a bore extending into the interior of the tip body from the end of the tip body opposite to said exterior surface and a groove in said bore space inwardly from the end of the tip body, and a sleeve slidably inserted into said bore and having internal threads and having a portion of its exterior swaged into said groove to secure said sleeve within said bore and the remaining portion of its exterior being positioned in said bore.
Claim 9
Dependent Claim
100 words
A replaceable choke tip comprising a tip body having an exterior surface adapted to coact to control flow through a choke, a bore extending into the interior of the tip body from the end of the tip body opposite to said exterior surface and a groove in said bore space inwardly from the end of the tip body, and a sleeve slidably inserted into said bore and having internal threads and having a portion of its exterior swaged into said groove to secure said sleeve within said bore and the remaining portion of its exterior being positioned in said bore.
Claim 10
Dependent Claim
16 words
A replaceable choke tip according to claim 7 wherein said tip body is a wear-resistant material.
Claim 11
Dependent Claim
15 words
A replaceable choke tip according to claim 7 wherein said tip body is tungsten carbide.
Claim 12
Dependent Claim
42 words
A replaceable choke tip according to claim 7 wherein said body includes a counterbore into the tip body around said bore to provide a surface surrounding said bore, said sleeve includes an outwardly extending flange positioned against said surface surrounding said bore.
Claim 13
Dependent Claim
29 words
A replaceable choke tip according to claim 7 wherein said internal threads being selected to mate with threads on a stem on which the tip is to be installed.
Claim 14
Dependent Claim
14 words
A replaceable choke tip according to claim 7 wherein said sleeve is stainless steel.
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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) | 1990-11-09 | 1991-05-11 | 1991-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-09 | 1995-05-11 | 1995-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-09 | 1999-05-11 | 1999-11-10 | $7700.00 | Window Closed / Lapsed |