US4838318A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elbow cover for an elbow in pipework
Assignee: Yamato Kogyo Co Ltd
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Filing: 1988-01-12
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Granted: 1989-06-13
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Expires: 2008-01-12
Abstract
Abstract A plastics elbow cover (A) capable of being positively and securely mounted on an elbow section of piping. The elbow cover includes a tab (9, 10) extending from each of two sides of a cover section (8) which fits over the pipe. One of the tabs (9) includes: a tongue (9a) which engages a hole (10c) formed by a bridge (10d) on the other tab (10).
Inventors
- 👤 Kazuo Karakawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:34
CPC Classifications
F; F16; F16L; F16L59/00; F16L59/10; F16L59/11; F16L11/00; F16L11/04; F16L11/12; Y; Y10; Y10T; Y10T137/00; Y10T137/6851; Y10T137/7036
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
220 words
An elbow cover for an elbow or curved section of piping, comprising: a housing section of substantially quarter-spherical shape which, in its operative or closed condition, defines two openings interconnected by a curved or angled bore, the housing section being correspondingly curved thereby defining a radially shaped outer region and a radially shaped inner region, the radically shaped inner region being split from one opening to the other when the housing section is in its inoperative or open condition, the housing section having a pair of tabs, one on each side of the split, the tabs including interengaging means such that the tabs may be interengaged, thereby closing the split when the housing section is in its closed condition wherein the tabs comprise first and second fan-shaped sections, the first fan-shaped section including a first tongue having a first engagement portion formed at a free end of said first tongue, the second fan-shaped section including a second tongue formed with a second engagement portion at a free end of said second tongue, and wherein said first and second fan shaped sections have, as viewed exteriorly, substantially completely concave first and second end portions, respectively, the first and second fan-shaped sections each having a series of arcuate reinforcing ribs formed on an outer surface thereof having successively increasing radii of curvature.
Claim 2
Dependent Claim
220 words
An elbow cover for an elbow or curved section of piping, comprising: a housing section of substantially quarter-spherical shape which, in its operative or closed condition, defines two openings interconnected by a curved or angled bore, the housing section being correspondingly curved thereby defining a radially shaped outer region and a radially shaped inner region, the radically shaped inner region being split from one opening to the other when the housing section is in its inoperative or open condition, the housing section having a pair of tabs, one on each side of the split, the tabs including interengaging means such that the tabs may be interengaged, thereby closing the split when the housing section is in its closed condition wherein the tabs comprise first and second fan-shaped sections, the first fan-shaped section including a first tongue having a first engagement portion formed at a free end of said first tongue, the second fan-shaped section including a second tongue formed with a second engagement portion at a free end of said second tongue, and wherein said first and second fan shaped sections have, as viewed exteriorly, substantially completely concave first and second end portions, respectively, the first and second fan-shaped sections each having a series of arcuate reinforcing ribs formed on an outer surface thereof having successively increasing radii of curvature.
Claim 3
Dependent Claim
15 words
An elbow cover as claimed in claim 1 which is made from a plastics material.
Claim 4
Dependent Claim
22 words
An elbow cover as claimed in claim 1 in which the tabs are integral with and form extensions of the housing section.
Claim 5
Dependent Claim
24 words
An elbow cover as claimed in claim 1 in which the second engagement portion comprises a hole arranged to receive captively the first tongue.
Claim 6
Dependent Claim
25 words
An elbow cover as claimed in claim 4 in which the first engagement portion comprises projections formed on the upper surface of the first tongue.
Claim 7
Dependent Claim
22 words
An elbow cover as claimed in claim 5 in which the engagement hole is defined by a bridge on the second tongue.
Claim 8
Dependent Claim
34 words
An elbow cover as claimed in claim 6 in which the second engagement portion comprises projections formed on the inner surface of the bridge so as to engage the projection on the first tongue.
Claim 9
Dependent Claim
34 words
An elbow cover as claimed in claim 6 in which the second engagement portion comprises a resilient engagement element arranged on the inner surface of the bridge so as to engage the first tongue.
Claim 10
Dependent Claim
43 words
An elbow cover as claimed in claim 8 in which the resilient engagement element is formed on its lower surface with engagement projections and is fixed at one end on the inner surface of the bridge and is free at its other end.
Claim 11
Dependent Claim
171 words
A plastic elbow cover comprising: a cover section of substantially quarter-spherical shape, and radial fan-shaped sections formed on both sides of the cover section so as to extend therefrom; one of the fan-shaped sections being provided at a tip end portion thereof with a tongue-like element, the tongue-like element being formed with an engagement; the other fan-shaped section being provided at a tip end portion thereof with a tongue-like element, the tongue-like element being formed with an engagement hole including an engagement member; the tongue-like element of the one radial fan-shaped section being securely inserted in the engagement hole of the tongue-like element of the other radial fan-shaped section to prevent disengagement of said one radial fan-shaped section from said other radial fan-shaped section wherein said first and second fan shaped sections have, as viewed exteriorly, substantially completely concave first and second end portions, respectively, the first and second fan-shaped sections each having a series of arcuate reinforcing ribs formed on an outer surface thereof having successively increasing radii of curvature.
Claim 12
Dependent Claim
171 words
A plastic elbow cover comprising: a cover section of substantially quarter-spherical shape, and radial fan-shaped sections formed on both sides of the cover section so as to extend therefrom; one of the fan-shaped sections being provided at a tip end portion thereof with a tongue-like element, the tongue-like element being formed with an engagement; the other fan-shaped section being provided at a tip end portion thereof with a tongue-like element, the tongue-like element being formed with an engagement hole including an engagement member; the tongue-like element of the one radial fan-shaped section being securely inserted in the engagement hole of the tongue-like element of the other radial fan-shaped section to prevent disengagement of said one radial fan-shaped section from said other radial fan-shaped section wherein said first and second fan shaped sections have, as viewed exteriorly, substantially completely concave first and second end portions, respectively, the first and second fan-shaped sections each having a series of arcuate reinforcing ribs formed on an outer surface thereof having successively increasing radii of curvature.
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) | 1992-06-12 | 1992-12-12 | 1993-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-12 | 1996-12-12 | 1997-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-12 | 2000-12-12 | 2001-06-13 | $7700.00 | Window Closed / Lapsed |