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US3796449A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reinforced flange for plastic pipe
Assignee: Ameron Inc
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Filing: 1972-04-28
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Granted: 1974-03-12
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Expires: 1992-04-28
Abstract
Abstract An improved flange for plastic pipe includes a reinforcing ring preferably embedded in a hub of the flange. The reinforcing ring is made of a material having greater strength than that of pipe or flange. The reinforced plastic flange improves resistance to hoop expansion of the plastic pipe, and increases the rupture strength of the flange.
Inventors
- 👤 Laughlin H Mc
- 👤 H Kline
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:54
CPC Classifications
F; F16; F16L; F16L47/00; F16L47/14; Y; Y10; Y10S; Y10S285/00; Y10S285/915
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
190 words
The combination comprising an elongated plastic pipe body of the type used in conducting fluids under pressure, a plastic flange connected to an exterior portion of the pipe body adjacent an end of the pipe, the plastic flange being comprised of flange and hub sections encircling the pipe body, the hub section being formed in a single piece with the flange section; the hub section being spaced longitudinally of the pipe body from the flange section, and being of substantially reduced diameter relative to the diameter of the flange section, the plastic flange being connected to the pipe body with the flange section adjacent the end of the pipe body and the hub section remote from the end of the pipe body, and a closed curve reinforcing O-ring having a layer of resin impregnated tape bonded thereto, said O-ring being embedded in the hub section with a major portion of the reinforcing ring encircling the pipe body at a location spaced longitudinally from the flange section, the reinforcing ring having a greater Young''s modulus than that of flange or the pipe body to improve the rupture strength of the flange.
Claim 2
Dependent Claim
190 words
The combination comprising an elongated plastic pipe body of the type used in conducting fluids under pressure, a plastic flange connected to an exterior portion of the pipe body adjacent an end of the pipe, the plastic flange being comprised of flange and hub sections encircling the pipe body, the hub section being formed in a single piece with the flange section; the hub section being spaced longitudinally of the pipe body from the flange section, and being of substantially reduced diameter relative to the diameter of the flange section, the plastic flange being connected to the pipe body with the flange section adjacent the end of the pipe body and the hub section remote from the end of the pipe body, and a closed curve reinforcing O-ring having a layer of resin impregnated tape bonded thereto, said O-ring being embedded in the hub section with a major portion of the reinforcing ring encircling the pipe body at a location spaced longitudinally from the flange section, the reinforcing ring having a greater Young''s modulus than that of flange or the pipe body to improve the rupture strength of the flange.
Claim 3
Dependent Claim
27 words
The combination according to claim 1 in which the reinforcing ring occupies between about 10 percent and about 60 percent of the volume of the hub section.
Claim 4
Dependent Claim
19 words
The combination according to claim 2 in which the flange and pipe body are made of molded fiber-reinforced plastic.
Claim 5
Dependent Claim
20 words
The combination according to claim 2 in which the inside diameter of the flange is at least about 6 inches.
Claim 6
Dependent Claim
19 words
The combination according to claim 1 in which the flange and pipe body are made of molded fiber-reinforced plastic.
Claim 7
Dependent Claim
16 words
The combination according to claim 1 in which the tape comprises resin-impregnated woven fiberglass fabric tape.
Claim 8
Dependent Claim
46 words
The combination according to claim 1 in which the tape is made of a fabric which can reduce stresses in the flange and provide greater rupture strength for the flange than a flange reinforced with a reinforcing ring not wrapped with a layer of such tape.
Claim 9
Dependent Claim
31 words
The combination according to claim 1 in which the layer of tape has a stiffness greater than that of the plastic in the flange, but less than that of reinforcing ring.
Claim 10
Dependent Claim
192 words
The combination comprising a plastic pipe body, a plastic flange connected to an exterior portion of the pipe body adjacent an end of the pipe, the plastic flange being comprised of flange and hub sections encircling the pipe body, the hub section being formed of a single piece with the flange section; the hub section being spaced longitudinally of the pipe body from the flange section with the hub section being of substantially reduced diameter relative to the diameter of the flange section, the plastic flange being connected to the pipe body, with the flange section adjacent the end of the pipe body and the hub section being remote from the end of the pipe body, and a closed curve reinforcing O-ring embedded in the flange section with the ring encircling the pipe body, the reinforcing ring having a greater Young''s modulus than that of the flange or pipe body so as to improve the rupture strength of the flange, the reinforcing O-ring being wrapped with a layer of resin impregnated tape bonded to the ring and capable of improving the stress resistance of the plastic in the vicinity of the ring.
Claim 11
Dependent Claim
192 words
The combination comprising a plastic pipe body, a plastic flange connected to an exterior portion of the pipe body adjacent an end of the pipe, the plastic flange being comprised of flange and hub sections encircling the pipe body, the hub section being formed of a single piece with the flange section; the hub section being spaced longitudinally of the pipe body from the flange section with the hub section being of substantially reduced diameter relative to the diameter of the flange section, the plastic flange being connected to the pipe body, with the flange section adjacent the end of the pipe body and the hub section being remote from the end of the pipe body, and a closed curve reinforcing O-ring embedded in the flange section with the ring encircling the pipe body, the reinforcing ring having a greater Young''s modulus than that of the flange or pipe body so as to improve the rupture strength of the flange, the reinforcing O-ring being wrapped with a layer of resin impregnated tape bonded to the ring and capable of improving the stress resistance of the plastic in the vicinity of the ring.
Claim 12
Dependent Claim
16 words
The combination according to claim 9 in which the tape comprises resin-impregnated woven fiberglass fabric tape.
Claim 13
Dependent Claim
46 words
The combination according to claim 9 in which the tape is made of a fabric which can reduce stresses in the flange and provide greater rupture strength for the flange than a flange reinforced with a reinforcing ring not wrapped with a layer of such tape.
Claim 14
Dependent Claim
32 words
The combination according to claim 9 in which the layer of tape has a greater stiffness than that of the plastic in the flange, but less than that of the reinforcing ring.
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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) | 1977-03-11 | 1977-09-10 | 1978-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-11 | 1981-09-10 | 1982-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-11 | 1985-09-10 | 1986-03-12 | $7700.00 | Window Closed / Lapsed |