US3914100A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe protective covering
Assignee: WHEELING-PITTSBURGH STEEL Corp A CORP OF
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Filing: 1974-07-29
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Granted: 1975-10-21
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Expires: 1994-07-29
Abstract
Abstract A protective covering for pipes exposed to high heat is formed of pairs of unlike split hollow tile sections which meet in a radial plane in interengaging surfaces along their edges. Those surfaces along one pair of edges are contoured to hinge on each other and those along the other pair of edges are contoured to separate by movement through an arc centered in the hinge. The pairs are held together by pins through their interengaging surfaces.
Inventors
- 👤 Lee Guskea
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:02
CPC Classifications
F; F22; F22B; F22B37/00; F22B37/02; F22B37/10; F22B37/107; F27; F27D; F27D3/00; F27D3/02
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
69 words
Pipe protective covering comprising a pair of hollow ceramic tiles shaped to enclose a pipe, the inner surface of each tile in cross section comprising a semi-circle, the tiles meeting along their edges in interengaging surfaces, one pair of such surfaces being contoured to hinge on each other and the other pair of such surfaces being contoured to separate by movement through an arc centered in the hinge axis.
Claim 2
Dependent Claim
69 words
Pipe protective covering comprising a pair of hollow ceramic tiles shaped to enclose a pipe, the inner surface of each tile in cross section comprising a semi-circle, the tiles meeting along their edges in interengaging surfaces, one pair of such surfaces being contoured to hinge on each other and the other pair of such surfaces being contoured to separate by movement through an arc centered in the hinge axis.
Claim 3
Dependent Claim
15 words
The article of claim 1 in which the interengaging surfaces are tongue and groove surfaces.
Claim 4
Dependent Claim
22 words
The article of claim 2 in which a tongue of the interengaging surfaces of the hinged pair projects inwardly of its tile.
Claim 5
Dependent Claim
21 words
The article of claim 2 in which the crests and valleys of the tongues and grooves are generally semi-circular in profile.
Claim 6
Dependent Claim
29 words
The article of claim 1 in which the interengaging surfaces of the hinged pair are positioned on one side only of a plane through the diameter of the semi-circle.
Claim 7
Dependent Claim
34 words
The article of claim 5 including a pin extending through the interengaging surfaces of the hinged pair disposed in a plane parallel to the plane through the diameter of the semi-circle and spaced therefrom.
Claim 8
Dependent Claim
39 words
The article of claim 5 in which the interengaging surfaces are tongue and groove surfaces and the tongue of the other pair of surfaces projects from the plane through the diameter of the semi-circle on the other side thereof.
Claim 9
Dependent Claim
37 words
The article of claim 5 including a pin extending through the interengaging surfaces of the hinged pair and a pin extending through the interengaging surfaces of the other pair, the pins being generally normal to each other.
Claim 10
Dependent Claim
27 words
The article of claim 1 including a pin extending through the interengaging surfaces of the other pair normal to a plane through the diameter of the semi-circle.
Claim 11
Dependent Claim
34 words
The article of claim 1 in which the outer surface of the mated tiles is of substantially elliptical cross section and the major axis of the ellipse lies on the diameter of the semi-circle.
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) | 1978-10-20 | 1979-04-21 | 1979-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-20 | 1983-04-21 | 1983-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-20 | 1987-04-21 | 1987-10-21 | $7700.00 | Window Closed / Lapsed |