US3873391A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of fabricating a plastic pipe fitting
Assignee: J-M MANUFACTURING Co COMPANY Inc A CORP OF
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Filing: 1972-07-19
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Granted: 1975-03-25
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Expires: 1992-07-19
Abstract
Abstract A method of fabricating a section of pipe fitting from a plurality of subsections and particularly a method of fabricating a non-linear plastic pipe fitting such as, for example, a tee fitting, wye fitting or the like is disclosed herein. The method includes forming predesigned complementary mitered edges in a plurality of plastic pipe subsections so that when the mitered edges engage one another in a complementary fashion, the subsections together take the shape of the desired fitting. The mitered edges are at least temporarily secured into engagement with one another by means of, for example, cement. Thereafter, a liquid mixture coating of elastomer resins such as polyurethane elastomer is applied, preferably by means of spray, to the external surfaces of the pipe subsections at the engaging mitered edges and allowed to set or cure to a tough but slightly resilient coating or band. In this manner, a more uniform coating or band can be readily applied to non-linear, irregular surfaces such as those defined by non-linear fittings.
Inventors
- 👤 John W Plauka
- 👤 Edwin A Cloud
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:40
CPC Classifications
B; B29; B29C; B29C65/00; B29C65/48; B29C65/50; B29C65/5042; B29C65/4805; B29C65/483; B29C65/485; B29C65/66; B29C65/68; B29C65/70; B29C66/00; B29C66/01; B29C66/05; B29C66/301; B29C66/50; B29C66/51; B29C66/52; B29C66/522; B29C66/5223; B29C66/52231; B29C66/5224; B29C66/52241; B29C66/5229; B29C66/52298; B29C41/00; B29C41/02; B29C41/08; B29C65/481; B29C65/4815; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/52297; B29C66/70; B29C66/71; B29L; B29L2031/00; B29L2031/24; B29L2031/243; B29L2031/246; Y; Y10; Y10S; Y10S285/00; Y10S285/915; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1062; Y10T156/1066; Y10T156/1075; Y10T156/1079
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
123 words
A METHOD OF FABRICATING A NONLINEAR PLASTIC PIPE FITTING, COMPRISING: A. FORMING A PLURALITY OF PREDESIGNED COMPLEMENTARY EDGES IN AT LEAST TWO PLASTIC PIPE SECTIONS SO THAT WHEN SAID FORMED EDGES ENGAGE ONE ANOTHER IN A COMPLEMENTARY FASHION, THE SECTIONS TOGETHER TAKE THE SHAPE OF SAID FITTING; B. PLACING SAID FORMED EDGES INTO ENGAGEMENT WITH ONE ANOTHER IN SAID COMPLEMENTARY FASHION; AND C. PERMANENTLY CONNECTING SAID SECTIONS TOGETHER BY SPRAYING A PLURALITY OF LIQUID MIXTURE COATINGS OF FLEXIBLE RESIN TO THE EXTERNAL SURFACES OF SAID PIPE SECTIONS OVER SAID ENGAGING EDGES SUCH THAT EACH OF SAID COATINGS IS A SINGLE CONTINUOUS COATING WHICH EXTENDS CIRCUMFERENTIALLY AROUND AT LEAST A PORTION OF EACH OF SAID SECTIONS AND ALLOWING SAID APPLIED LIQUID MIXTURE TO SET.
Claim 2
Independent Claim
123 words
A METHOD OF FABRICATING A NONLINEAR PLASTIC PIPE FITTING, COMPRISING: A. FORMING A PLURALITY OF PREDESIGNED COMPLEMENTARY EDGES IN AT LEAST TWO PLASTIC PIPE SECTIONS SO THAT WHEN SAID FORMED EDGES ENGAGE ONE ANOTHER IN A COMPLEMENTARY FASHION, THE SECTIONS TOGETHER TAKE THE SHAPE OF SAID FITTING; B. PLACING SAID FORMED EDGES INTO ENGAGEMENT WITH ONE ANOTHER IN SAID COMPLEMENTARY FASHION; AND C. PERMANENTLY CONNECTING SAID SECTIONS TOGETHER BY SPRAYING A PLURALITY OF LIQUID MIXTURE COATINGS OF FLEXIBLE RESIN TO THE EXTERNAL SURFACES OF SAID PIPE SECTIONS OVER SAID ENGAGING EDGES SUCH THAT EACH OF SAID COATINGS IS A SINGLE CONTINUOUS COATING WHICH EXTENDS CIRCUMFERENTIALLY AROUND AT LEAST A PORTION OF EACH OF SAID SECTIONS AND ALLOWING SAID APPLIED LIQUID MIXTURE TO SET.
Claim 3
Dependent Claim
26 words
A method according to claim 1 wherein the liquid mixture coatings of flexible resin applied to said pipe sections are liquid mixture coatings of elastomeric resin.
Claim 4
Dependent Claim
14 words
A method according to claim 2 wherein said elastomeric resin is a polyurethane elastomer.
Claim 5
Dependent Claim
34 words
A method according to claim 1 including; a. applying a curing agent to the external surfaces of said pipe sections at said engaging edges substantially simultaneously with the application of said liquid mixture coatings.
Claim 6
Dependent Claim
31 words
A method according to claim 1 including: a. temporarily fastening said formed edges into engagement with one another in said complementary fashion prior to the application of said liquid mixture coatings.
Claim 7
Dependent Claim
26 words
A method according to claim 5 including: a. smoothing out any irregularities at said engaging edges after the latter have been at least temporarily fastened together.
Claim 8
Dependent Claim
26 words
A method according to claim 1 wherein said liquid mixture coatings are applied to a substantial portion of said pipe sections including over said engaging edges.
Claim 9
Dependent Claim
30 words
A method according to claim 1 including; a. masking off those areas of said pipe sections not to be coated with said liquid mixture coatings prior to the application thereof.
Claim 10
Dependent Claim
13 words
A method according to claim 1 wherein said fitting is a wye fitting.
Claim 11
Dependent Claim
13 words
A method according to claim 1 wherein said fitting is a tee fitting.
Claim 12
Dependent Claim
13 words
A method according to claim 1 wherein said fitting is an elbow fitting.
Claim 13
Dependent Claim
23 words
A method according to claim 1 wherein said coatings are applied only to portions of said sections, said portions including said formed edges.
Claim 14
Dependent Claim
169 words
A method of fabricating a nonlinear plastic pipe fitting adapted to join at least two pipes together after said fitting has been fabricated, comprising: a. forming a plurality of predesigned complementary mitered edges in at least two plastic pipe sections so that when said mitered edges engage one another in a complementary fashion, the sections together take the shape of said nonlinear fitting; b. temporarily fastening said mitered edges into engagement with one another in said complementary fashion; and c. permanently connecting said sections together by spraying a plurality of integral liquid mixture coatings of elastomeric resin to the external surfaces of said pipe sections over said engaging mitered edges such that each of said coatings is a single continuous coating which extends circumferentially around at least a portion of each of said sections and allowing said liquid mixture coating to set. 14. A method according to claim 13 wherein said liquid mixture coatings are applied to a substantial portion of said pipe sections including said engaging mitered edges.
Claim 15
Dependent Claim
29 words
A method according to claim 14 including; a. masking off those areas of said pipe sections not to be coated with said liquid mixture coatings prior to application thereof.
Claim 16
Dependent Claim
31 words
A method according to claim 15 including; a. smoothing out any irregularitIes at said engaging edges after the latter have been fastened together but before application of said liquid mixture coatings.
Claim 17
Dependent Claim
14 words
A method according to claim 16 wherein said elastomeric resin is a polyurethane elastomer.
Claim 18
Independent Claim
106 words
A method of fabricating a nonlinear plastic pipe fitting, comprising: a. forming predesigned complementary edges in a plurality of plastic pipe sections so that when said formed edges engage one another in a complementary fashion, the sections together take the shape of said fitting; b. placing said formed edges into engagement with one another in said complementary fashion; and c. permanently connecting said sections together by spraying a plurality of liquid mixture coating layers of flexible resin to the external surfaces of said pipe sections over said engaging edges, said layers being sprayed at predetermined time intervals and allowing said applied liquid mixture layers to set.
Claim 19
Independent Claim
106 words
A method of fabricating a nonlinear plastic pipe fitting, comprising: a. forming predesigned complementary edges in a plurality of plastic pipe sections so that when said formed edges engage one another in a complementary fashion, the sections together take the shape of said fitting; b. placing said formed edges into engagement with one another in said complementary fashion; and c. permanently connecting said sections together by spraying a plurality of liquid mixture coating layers of flexible resin to the external surfaces of said pipe sections over said engaging edges, said layers being sprayed at predetermined time intervals and allowing said applied liquid mixture layers to set.
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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) | 1978-03-24 | 1978-09-23 | 1979-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-24 | 1982-09-23 | 1983-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-24 | 1986-09-23 | 1987-03-25 | $7700.00 | Window Closed / Lapsed |