Patent US6031533A successfully refreshed from Google Patents.
US4637618A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite gasket and fitting including same
Assignee: WESTERN BANK PUERTO RICO
•
Filing: 1984-07-13
•
Granted: 1987-01-20
•
Expires: 2004-07-13
Abstract
Abstract A composite gasket for forming a seal between a pipe bell 52 and a spigot 58 comprises a major portion 12 of non-elastomeric plastic material and a minor portion 14 of elastomeric material. The minor portion is axially encased by the major portion. The minor portion includes a sealing lip 16 extending radially inwardly from the major portion. The composite gasket can be manually inserted within a preformed grooved bell or the grooved bell can be formed over the gasket while the gasket is mounted on a mandrel.
Inventors
- 👤 Jose E. Valls
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:42
CPC Classifications
F; F16; F16L; F16L47/00; F16L47/06; F16L47/08; F16L47/10; F16L17/00; F16L17/02; F16L17/03; F16L17/032; Y; Y10; Y10S; Y10S277/00; Y10S277/905; Y10S277/922; Y10S277/935; Y10S277/944
Claims Analysis
Total Claims: 35
Claim 1
Independent Claim
72 words
A composite gasket for forming a seal between a pipe bell and a spigot, comprising: a major portion of non-elastomeric plastic material; and a minor portion of elastomeric material, said minor portion being axially encased by said major portion and having a first sealing lip extending from said major portion in a radial direction, said major portion including first and second segments entrapping said minor portion therebetween, said segments having interlocking sections.
Claim 2
Dependent Claim
72 words
A composite gasket for forming a seal between a pipe bell and a spigot, comprising: a major portion of non-elastomeric plastic material; and a minor portion of elastomeric material, said minor portion being axially encased by said major portion and having a first sealing lip extending from said major portion in a radial direction, said major portion including first and second segments entrapping said minor portion therebetween, said segments having interlocking sections.
Claim 3
Dependent Claim
17 words
A composite gasket according to claim 1 wherein said sealing lip is triangular in transverse cross section.
Claim 4
Dependent Claim
27 words
A composite gasket according to claim 4 wherein said minor portion is generally T-shaped in transverse cross section with said sealing lip forming a vertical leg thereof.
Claim 5
Dependent Claim
24 words
A composite gasket according to claim 1 wherein a second elastrometic sealing lip extends from said major portion radially opposite said first sealing lip.
Claim 6
Dependent Claim
93 words
A composite gasket for forming a seal between a pipe bell and a spigot, comprising: a major portion of non-elastomeric plastic material; and a minor portion of elastomeric material, said minor portion being axially encased by said major portion and having a first sealing lip extending from said major portion in a radial direction, said major portion including first and second segments entrapping said minor portion therebetween, said first segment having an axially extending, unitary latch member, and said second segment having a recess which mates with and positively engages said latch member.
Claim 7
Dependent Claim
93 words
A composite gasket for forming a seal between a pipe bell and a spigot, comprising: a major portion of non-elastomeric plastic material; and a minor portion of elastomeric material, said minor portion being axially encased by said major portion and having a first sealing lip extending from said major portion in a radial direction, said major portion including first and second segments entrapping said minor portion therebetween, said first segment having an axially extending, unitary latch member, and said second segment having a recess which mates with and positively engages said latch member.
Claim 8
Dependent Claim
27 words
A composite gasket according to claim 5 wherein said minor portion is generally T-shaped in transverse cross section with said sealing lip forming a vertical leg thereof.
Claim 9
Dependent Claim
24 words
A composite gasket according to claim 5 wherein a second elastromeric sealing lip extends from said major portion radially opposite said first sealing lip.
Claim 10
Dependent Claim
77 words
A composite gasket for forming a seal between a pipe bell and a spigot, comprising: a major portion of non-elastomeric plastic material; and a minor portion of elastomeric material, said minor portion being axially encased by said major portion and having a first sealing lip extending from said major portion in a radial direction, said major portion including first and second segments entrapping said minor portion therebetween, said segments being directly bonded to form an integral member.
Claim 11
Dependent Claim
77 words
A composite gasket for forming a seal between a pipe bell and a spigot, comprising: a major portion of non-elastomeric plastic material; and a minor portion of elastomeric material, said minor portion being axially encased by said major portion and having a first sealing lip extending from said major portion in a radial direction, said major portion including first and second segments entrapping said minor portion therebetween, said segments being directly bonded to form an integral member.
Claim 12
Dependent Claim
13 words
A composite gasket according to claim 8 wherein said segments are adhesively bonded.
Claim 13
Dependent Claim
12 words
A composite gasket according to claim 8 wherein said segments are welded.
Claim 14
Dependent Claim
14 words
A composite gasket according to claim 8 wherein said non-elastomeric material is a polyolefin.
Claim 15
Dependent Claim
12 words
A composite gasket according to claim 11 wherein said polyolefin is polyethylene.
Claim 16
Dependent Claim
12 words
A composite gasket according to claim 11 wherein said polyolefin is polypropylene.
Claim 17
Dependent Claim
13 words
A composite gasket according to claim 8 wherein said non-elastomeric material is poly(vinylchloride).
Claim 18
Dependent Claim
27 words
A composite gasket according to claim 8 wherein said minor portion is generally T-shaped in transverse cross section with said sealing lip forming a vertical leg thereof.
Claim 19
Dependent Claim
24 words
A composite gasket according to claim 8 wherein a second elastromeric sealing lip extends from said major portion radially opposite said first sealing lip.
Claim 20
Dependent Claim
96 words
A pipe fitting for a plastic pipe system, comprising: a cylindrical body having a radially extending circumferential groove; a composite gasket mounted in said groove, including a major portion of non-elastomeric material sealed in said groove, a minor portion of elastomeric material, said minor portion being axially encased by said major portion and having a first sealing lip extending from said major portion in a radial direction, and a second elastomeric sealing lip extending from said major portion radially opposite said first sealing lip; and a circumferential notch in said groove receiving said second sealing lip.
Claim 21
Dependent Claim
96 words
A pipe fitting for a plastic pipe system, comprising: a cylindrical body having a radially extending circumferential groove; a composite gasket mounted in said groove, including a major portion of non-elastomeric material sealed in said groove, a minor portion of elastomeric material, said minor portion being axially encased by said major portion and having a first sealing lip extending from said major portion in a radial direction, and a second elastomeric sealing lip extending from said major portion radially opposite said first sealing lip; and a circumferential notch in said groove receiving said second sealing lip.
Claim 22
Dependent Claim
26 words
A pipe fitting according to claim 17 wherein said body comprises a pipe bell; said groove opens radially inwardly; and said sealing lip extends radially inwardly.
Claim 23
Dependent Claim
16 words
A pipe fitting according to claim 17 wherein said body is bonded to said major portion.
Claim 24
Dependent Claim
20 words
A pipe fitting according to claim 19 wherein said body and said major portion are formed of substantially identical materials.
Claim 25
Dependent Claim
16 words
A pipe fitting according to claim 20 wherein said body is welded to said major portion.
Claim 26
Dependent Claim
103 words
A composite gasket for forming a seal between a pipe bell and a spigot, comprising: a major portion of non-elastomeric plastic material; and a minor portion of elastomeric material, said minor portion being axially encased by said major portion and having a first sealing lip extending from said major portion in a radial direction, said major portion including first and second segments entrapping said minor portion therebetween, said sealing lip extending radially inwardly, said first and second segments having first and second cylindrical inner surfaces, respectively, adjacent said sealing lip, said second inner surface having a greater diameter than said first inner surface.
Claim 27
Dependent Claim
103 words
A composite gasket for forming a seal between a pipe bell and a spigot, comprising: a major portion of non-elastomeric plastic material; and a minor portion of elastomeric material, said minor portion being axially encased by said major portion and having a first sealing lip extending from said major portion in a radial direction, said major portion including first and second segments entrapping said minor portion therebetween, said sealing lip extending radially inwardly, said first and second segments having first and second cylindrical inner surfaces, respectively, adjacent said sealing lip, said second inner surface having a greater diameter than said first inner surface.
Claim 28
Dependent Claim
87 words
A pipe fitting for a plastic pipe system, comprising: a cylindrical body having a radially extending circumferential groove; and a composite gasket mounted in said groove, including a major portion of non-elastomeric material sealed in said groove, and a minor portion of elastomeric material, said minor portion being axially encased by said major portion and having a first sealing lip extending from said major portion in a radial direction, said major portion including first and second segments directly contacting each other and entrapping said minor portion therebetween.
Claim 29
Dependent Claim
87 words
A pipe fitting for a plastic pipe system, comprising: a cylindrical body having a radially extending circumferential groove; and a composite gasket mounted in said groove, including a major portion of non-elastomeric material sealed in said groove, and a minor portion of elastomeric material, said minor portion being axially encased by said major portion and having a first sealing lip extending from said major portion in a radial direction, said major portion including first and second segments directly contacting each other and entrapping said minor portion therebetween.
Claim 30
Dependent Claim
16 words
A pipe fitting according to claim 23 wherein said body is welded to said major portion.
Claim 31
Dependent Claim
13 words
A pipe fitting according to claim 23 wherein said segments have interlocking sections.
Claim 32
Dependent Claim
33 words
A pipe fitting according to claim 23 wherein said first segment comprises an axially extending latch member; and said second segment comprises a recess which mates with and positively engages said latch member.
Claim 33
Dependent Claim
17 words
A pipe fitting according to claim 23 wherein said segments are bonded to form an integral member.
Claim 34
Dependent Claim
13 words
A pipe fitting according to claim 27 wherein said segments are adhesively bonded.
Claim 35
Dependent Claim
12 words
A pipe fitting according to claim 27 wherein said segments are welded.
References Cited (Backward Citations)
US27736A
Cited
US3124366A
Cited
US1856580A
Cited
US1826321A
Cited
US2205910A
Cited
US2883224A
Cited
US2953398A
Cited
US2935349A
Cited
US3058752A
Cited
US3171662A
Cited
DE1194211B
Cited
FR1320863A
Cited
US3260540A
Cited
US3265410A
Cited
US3493236A
Cited
US3520047A
Cited
US3377659A
Cited
CH469219A
Cited
GB1133412A
Cited
US3588132A
Cited
GB1158358A
Cited
DE1924410A1
Cited
US3680874A
Cited
US3823216A
Cited
US3857589A
Cited
US3807027A
Cited
US3793427A
Cited
USRE27736E
Cited
GB1443711A
Cited
GB1389773A
Cited
US3924881A
Cited
US4097076A
Cited
US4120521A
Cited
US4032159A
Cited
US4053166A
Cited
US4066269A
Cited
US4428900A
Cited
US4040636A
Cited
JPS5376419A
Cited
JPS53127578A
Cited
GB1595172A
Cited
US4230157A
Cited
US4229026A
Cited
US4362323A
Cited
US4181698A
Cited
US4269437A
Cited
US4223896A
Cited
US4268045A
Cited
US4379559A
Cited
US4353860A
Cited
US4368894A
Cited
US4343480A
Cited
US4343480B1
Cited
US4336014A
Cited
US4386045A
Cited
US4387900A
Cited
FR2528534A1
Cited
DE3232075A1
Cited
US4579354A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-01-19 | 1990-07-21 | 1991-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-19 | 1994-07-21 | 1995-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-19 | 1998-07-21 | 1999-01-20 | $7700.00 | Window Closed / Lapsed |