US4262744A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molded fittings and methods of manufacture
Assignee: Certainteed LLC
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Filing: 1979-12-14
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Granted: 1981-04-21
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Expires: 1999-12-14
Abstract
Abstract A well screen and method for its manufacture are disclosed. The well screen is assembled from molded parts. The parts are initially formed with a continuous, imperforate outer skin. Continuous circumferential slots are cut in the skin to form a foraminous screen. Integrally formed annular ribs located between each slot provide crush resistance.
Inventors
- 👤 Andrew Mitchell
- 👤 Kermit W. Janssen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:37
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/01; B01D29/012; B01D29/05; B01D29/07; B01D29/071; B01D29/11; B01D29/111; B01D29/13; B01D29/15; B01D29/44; B29; B29C; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/114; B29C66/1142; B29C65/00; B29C65/02; B29C65/06; B29C65/48; B29C65/4895; B29C66/70; B29C66/71
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
88 words
A well screen unit comprising a body having a continuous, substantially imperforate skin having an outer surface and an inner surface, a plurality of transverse, spaced compression ribs arranged to extend inwardly from the inner surface of the skin and being formed integrally with the skin, at least one longitudinally extending rib extending from the inner surface of the skin and being formed integrally with the skin, and means disposed at opposite lateral edges of the body defining joining surfaces for joining the body to another similar body.
Claim 2
Dependent Claim
88 words
A well screen unit comprising a body having a continuous, substantially imperforate skin having an outer surface and an inner surface, a plurality of transverse, spaced compression ribs arranged to extend inwardly from the inner surface of the skin and being formed integrally with the skin, at least one longitudinally extending rib extending from the inner surface of the skin and being formed integrally with the skin, and means disposed at opposite lateral edges of the body defining joining surfaces for joining the body to another similar body.
Claim 3
Dependent Claim
58 words
A unit as in claim 1 wherein the compression ribs extend radially inwardly, running from one lateral edge to the opposite lateral edge of the skin, and are parallel with respect to each other and in planes that are orthogonal to the longitudinal axis of the unit, and each longitudinal rib extends parallel to the said longitudinal axis.
Claim 4
Dependent Claim
15 words
A unit as in claim 1 wherein the longitudinal rib extends beyond the transverse ribs.
Claim 5
Dependent Claim
16 words
A unit as in claim 1 wherein the body forms a portion of a tubular shape.
Claim 6
Dependent Claim
11 words
A unit as in claim 4 wherein the shape is cylindrical.
Claim 7
Dependent Claim
95 words
A well screen comprising a plurality of longitudinally extending molded sections joined together along lateral edges to form a tubular hollow screen body, each section comprising a skin, a plurality of spaced compression ribs extending inwardly from the skin toward the hollow interior of the screen body, each section having at least one longitudinal rib extending inwardly from the skin toward the hollow interior of the screen body, and a plurality of spaced slots formed in the skin and extending therethrough, the slots being disposed in portions of the skin located between adjacent compression ribs.
Claim 8
Dependent Claim
95 words
A well screen comprising a plurality of longitudinally extending molded sections joined together along lateral edges to form a tubular hollow screen body, each section comprising a skin, a plurality of spaced compression ribs extending inwardly from the skin toward the hollow interior of the screen body, each section having at least one longitudinal rib extending inwardly from the skin toward the hollow interior of the screen body, and a plurality of spaced slots formed in the skin and extending therethrough, the slots being disposed in portions of the skin located between adjacent compression ribs.
Claim 9
Dependent Claim
20 words
A well screen as in claim 6 wherein the compression ribs and longitudinal ribs are molded integrally with the skin.
Claim 10
Dependent Claim
18 words
A well screen as in claims 6 or 7 wherein the slots are substantially continuous about the body.
Claim 11
Dependent Claim
45 words
A well screen as in claims 6 or 7 wherein the hollow body is cylindrical, the compression ribs are arranged to extend radially inwardly and in parallel relationship with respect to each other, the longitudinal rib extending parallel to the axis of the cylindrical body.
Claim 12
Independent Claim
78 words
A method of making a foraminous screen, comprising forming an intermediate unit having a skin with an exterior surface and an interior surface having a plurality of spaced compression ribs formed integrally with the skin and extending from said interior surface and at least one longitudinal rib formed integrally with the skin and extending from the interior surface of the skin, and forming a plurality of slots extending through the skin in regions located between adjacent compression ribs.
Claim 13
Independent Claim
78 words
A method of making a foraminous screen, comprising forming an intermediate unit having a skin with an exterior surface and an interior surface having a plurality of spaced compression ribs formed integrally with the skin and extending from said interior surface and at least one longitudinal rib formed integrally with the skin and extending from the interior surface of the skin, and forming a plurality of slots extending through the skin in regions located between adjacent compression ribs.
Claim 14
Dependent Claim
22 words
A method as in claim 10 and further comprising joining at least two of said units together to form a hollow body.
Claim 15
Dependent Claim
20 words
A method as in claim 11 wherein the slots are formed in the sections prior to joining the sections together.
Claim 16
Dependent Claim
31 words
A method as in claim 10 wherein the slots are formed by making continuous cuts in the skin of the section, the cuts extending between opposed lateral edges of the section.
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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) | 1984-04-20 | 1984-10-20 | 1985-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-04-20 | 1988-10-20 | 1989-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-04-20 | 1992-10-20 | 1993-04-21 | $7700.00 | Window Closed / Lapsed |