Patent US3850459A successfully refreshed from Google Patents.
US3850459A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reinforced plastic pipe fittings
Assignee: R & G Sloane Manufacturing Co Inc us
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Filing: 1973-07-27
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Granted: 1974-11-26
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Expires: 1993-07-27
Abstract
Abstract Plastic pipe fittings are reinforced by selectively thickening the walls of the fittings in the areas of greatest stress, and by thinning the fitting walls where permissible, thereby resulting in an economical utilization of the plastic material from which they are fabricated. In the case of tees and elbows, they are selectively reinforced by increasing the wall thickness adjacent the inner ends of the sockets thereof and in the crotch and central body areas thereof. The thickness of the reinforced fittings is determined, both theoretically and empirically, by relating the wall thickness of the fitting, at the points of greatest stress, to the wall thickness of the pipe to be coupled to the fitting.
Inventors
- 👤 J Blumenkranz
- 👤 C Putzier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:08
CPC Classifications
F; F16; F16L; F16L41/00; F16L41/02; F16L47/00; F16L47/26; F16L47/32
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
177 words
A plastic pipe fitting designed for the transport of fluid under pressure comprising: a. a wall defining a first socket adapted to receive the end portion of a plastic pipe in mating relationship therein, 1. said wall having a first thickness (tf) adjacent to the inner end of said first socket, 2. the minimum value of said first thickness being determined by the formula: tf Dp/((Dp/ttp) -2) where: Dp outer diameter of said plastic pipe; tp wall thickness of said plastic pipe; b. a branch socket having a longitudinal axis extending at an angle to the longitudinal axis of said first socket; c. a crotch area at the point of intersection of said sockets, said crotch area having a crotch wall thickness that is approximately 1.4 to 1.6 times greater than said first wall thickness; d. said first wall thickness being determined at a point transversely aligned with said crotch area; e. the outer surface of said first socket wall viewed at the crotch area being eccentric with respect to the longitudinal axis of said first socket.
Claim 2
Dependent Claim
177 words
A plastic pipe fitting designed for the transport of fluid under pressure comprising: a. a wall defining a first socket adapted to receive the end portion of a plastic pipe in mating relationship therein, 1. said wall having a first thickness (tf) adjacent to the inner end of said first socket, 2. the minimum value of said first thickness being determined by the formula: tf Dp/((Dp/ttp) -2) where: Dp outer diameter of said plastic pipe; tp wall thickness of said plastic pipe; b. a branch socket having a longitudinal axis extending at an angle to the longitudinal axis of said first socket; c. a crotch area at the point of intersection of said sockets, said crotch area having a crotch wall thickness that is approximately 1.4 to 1.6 times greater than said first wall thickness; d. said first wall thickness being determined at a point transversely aligned with said crotch area; e. the outer surface of said first socket wall viewed at the crotch area being eccentric with respect to the longitudinal axis of said first socket.
Claim 3
Dependent Claim
43 words
The pipe fitting of claim 1 wherein said fitting is a tee fitting having a central body area connecting said sockets, said central body area having a body wall thickness that is approximately 1.6 to 2.2 times greater than said first wall thickness.
Claim 4
Dependent Claim
125 words
the minimum value of said first thickness being determined by the formula: tf Dp/((Dp/ttp) -2) where: Dp outer diameter of said plastic pipe; tp wall thickness of said plastic pipe; b. a branch socket having a longitudinal axis extending at an angle to the longitudinal axis of said first socket; c. a crotch area at the point of intersection of said sockets, said crotch area having a crotch wall thickness that is approximately 1.4 to 1.6 times greater than said first wall thickness; d. said first wall thickness being determined at a point transversely aligned with said crotch area; e. the outer surface of said first socket wall viewed at the crotch area being eccentric with respect to the longitudinal axis of said first socket.
Claim 5
Dependent Claim
125 words
the minimum value of said first thickness being determined by the formula: tf Dp/((Dp/ttp) -2) where: Dp outer diameter of said plastic pipe; tp wall thickness of said plastic pipe; b. a branch socket having a longitudinal axis extending at an angle to the longitudinal axis of said first socket; c. a crotch area at the point of intersection of said sockets, said crotch area having a crotch wall thickness that is approximately 1.4 to 1.6 times greater than said first wall thickness; d. said first wall thickness being determined at a point transversely aligned with said crotch area; e. the outer surface of said first socket wall viewed at the crotch area being eccentric with respect to the longitudinal axis of said first socket.
Claim 6
Dependent Claim
40 words
The pipe fitting of claim 2 wherein the outer diameter to first wall thickness ratio of the first socket is substantially equal to the outer diameter to wall thickness ratio of the pipe to be received in said first socket.
Claim 7
Dependent Claim
39 words
The pipe fitting of claim 2 wherein the outer diameter to first wall thickness ratio of the first socket is less than the outer diameter to wall thickness ratio of the pipe to be received in said first socket.
Claim 8
Dependent Claim
43 words
The pipe fitting of claim 1 wherein said fitting is an elbow fitting having a central body area connecting said sockets, said central body area having a body wall thickness that is approximately 1.4 to 2.2 times greater than said first wall thickness.
Claim 9
Dependent Claim
40 words
The pipe fitting of claim 5 wherein the outer diameter to first wall thickness ratio of the first socket is substantially equal to the outer diameter to wall thickness ratio of the pipe to be received in said first socket.
Claim 10
Dependent Claim
39 words
The pipe fitting of claim 5 wherein the outer diameter to first wall thickness ratio of the first socket is less than the outer diameter to wall thickness ratio of the pipe to be received in said first socket.
Claim 11
Dependent Claim
112 words
The pipe fitting of claim 5 wherein said elbow comprises: a. a second wall defining said branch socket, said second wall having a first thickness (tf) adjacent to the inner end of said branch socket, the minimum value of said first thickness of said second wall being determined by the formula of claim 1 with respect to the plastic pipe to be received in said branch socket; b. said first thickness of said second wall being determined at a point transversely aligned with said crotch area; c. the outer surface of said branch socket wall viewed at the crotch area being eccentric with respect to the longitudinal axis of said branch socket.
Claim 12
Dependent Claim
39 words
The pipe fitting of claim 8 wherein the outer diameter to first thickness ratio of the second socket is substantially equal to the outer diameter to wall thickness ratio of the pipe to be received in said second socket.
Claim 13
Dependent Claim
185 words
The pipe fitting of claim 2 wherein said tee further comprises: a. a second wall defining said branch socket, said angle being substantially a right angle; b. a third wall defining a third socket coaxial with said first socket and at a right angle to said branch socket, said third wall having a first thickness (tf) adjacent to the inner end of said third socket, the minimum value of said first thickness of said third wall being determined by the formula of claim 1 with respect to the plastic pipe to be received in said third socket; c. a second crotch area at the point of intersection of said branch and third sockets, said second crotch area having a crotch wall thickness that is approximately 1.4 to 1.6 times greater than the first thickness of said third wall; d. said first thickness of said third wall being determined at a point transversely aligned with said second crotch area; e. the outer surface of said third socket wall viewed at the second crotch area being eccentric with respect to the longitudinal axis of said third socket.
Claim 14
Dependent Claim
39 words
The pipe fitting of claim 10 wherein the outer diameter to first thickness ratio of the third socket is substantially equal to the outer diameter to wall thickness ratio of the pipe to be received in said third socket.
Claim 15
Dependent Claim
46 words
The pipe fitting of claim 1 further comprising a second thickness for said first socket wall adjacent to the outer end of the first socket substantially less than said first thickness, the outer surface of said first socket wall being tapered inwardly toward said other end.
Claim 16
Dependent Claim
48 words
The pipe fitting of claim 8 further comprising a second thickness for each socket wall adjacent to the outer end of each socket substantially less than the respective first thickness of each socket wall, the outer surface of each socket wall being tapered inwardly toward the outer end.
Claim 17
Dependent Claim
48 words
The pipe fitting of claim 10 further comprising a second thickness for each socket wall adjacent to the outer end of each socket substantially less than the respective first thickness of each socket wall, the outer surface of each socket wall being tapered inwardly toward the outer end.
Claim 18
Dependent Claim
33 words
The plastic pipe fitting of claim 1 in combination with a plastic pipe designed to fit said first socket, said pipe having an outer diameter of Dp and a wall thickness of tp.
Claim 19
Dependent Claim
74 words
The plastic pipe fitting of claim 8 in combination with a. a first plastic pipe designed to fit said first socket, said First pipe having an outer diameter of Dp and a wall thickness of tp with respect to said first socket, and b. a second pipe designed to fit said branch socket, said second pipe having an outer diameter of Dp and a wall thickness of tp with respect to said branch socket.
Claim 20
Dependent Claim
75 words
The plastic pipe fitting of claim 10 in combination with a. a first plastic pipe designed to fit said first socket, said first pipe having an outer diameter of Dp and a wall thickness of tp with respect to said first socket, and b. a second plastic pipe designed to fit said third socket, said second pipe having an outer diameter of Dp and a wall thickness of tp with respect to said third socket.
References Cited (Backward Citations)
US2735699A
Cited
US2670224A
Cited
US2769647A
Cited
DE1014803B
Cited
GB933560A
Cited
US3108826A
Cited
US3381982A
Cited
US3498648A
Cited
US3610288A
Cited
US3614137A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-25 | 1978-05-27 | 1978-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-25 | 1982-05-27 | 1982-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-25 | 1986-05-27 | 1986-11-26 | $7700.00 | Window Closed / Lapsed |