Patent US3917499A successfully refreshed from Google Patents.
US3917499A
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Method of bonding components made of thermoplastic materials
Assignee: Dayco Products LLC
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Filing: 1973-10-11
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Granted: 1975-11-04
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Expires: 1993-10-11
Abstract
Abstract A method of bonding components having exposed surfaces made of thermoplastic materials is provided wherein the exposed surface of one of the components is treated with a liquid plasticizer and the exposed surface of another of the components is placed against the treated exposed surface and at least one of the exposed surfaces is heated to a temperature above ambient whereupon the surfaces are cooled whereby such surfaces are fused together.
Inventors
- 👤 Homer N Holden
- 👤 Vernon D Browning
- 👤 Bascom D Blevins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:42
CPC Classifications
F; F16; F16L; F16L11/00; F16L11/04; F16L11/11; F16L11/115; B; B29; B29C; B29C65/00; B29C65/48; B29C65/4895; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/13; B29C66/135; B29C66/50; B29C66/51; B29C66/52; B29C66/526; B29C66/53; B29C66/532; B29C66/61; B29C66/612; B29C66/70; B29C66/72; B29C66/723; B29C66/7232; B29C66/72321; B29C66/73; B29C66/739; B29C66/7392; B29C66/73921; B29C65/52; B29C65/522; B29C66/71; B29L; B29L2023/00; B29L2023/18; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1005
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
113 words
A METHOD OF MAKING A REINFORCED FLEXIBLE CONDUIT COMPRISING THE STEPS OF FORMING A REINFORCING MEMBER HAVING AN OUTSIDE SURFACE MADE OF A THERMOPLASTIC MATERIAL INTO A HELICAL PATTERN, COATING THE ENTIRE OUTSIDE SURFACE WITH A LIQUID PLASTICIZER, PROVIDING A TUBE OF A THERMOPLASTIC MATERIAL, PLACING A SURFACE OF THE TUBE AGAINST THE COATED OUTSIDE SURFACE, HEATING AT LEAST ONE OF SAID SURFACES TO A TEMPERATURE ABOVE AMBIENT TEMPERATURE, AND COOLING SAID SURFACES WHEREBY SAID TUBE AND REINFORCING MEMBER ARE FUSED TOGATHER BY SAID PLASTICIZER, SAID COATING STEP COMPRISING INTRODUCING SAID REINFORCING MEMBER INTO A CHAMBER HAVING A MIST OF SAID LIQUID PLASTICIZER THEREIN WHICH SETTLE ON SAID OUTSIDE SURFACE AS A COATING.
Claim 2
Independent Claim
113 words
A METHOD OF MAKING A REINFORCED FLEXIBLE CONDUIT COMPRISING THE STEPS OF FORMING A REINFORCING MEMBER HAVING AN OUTSIDE SURFACE MADE OF A THERMOPLASTIC MATERIAL INTO A HELICAL PATTERN, COATING THE ENTIRE OUTSIDE SURFACE WITH A LIQUID PLASTICIZER, PROVIDING A TUBE OF A THERMOPLASTIC MATERIAL, PLACING A SURFACE OF THE TUBE AGAINST THE COATED OUTSIDE SURFACE, HEATING AT LEAST ONE OF SAID SURFACES TO A TEMPERATURE ABOVE AMBIENT TEMPERATURE, AND COOLING SAID SURFACES WHEREBY SAID TUBE AND REINFORCING MEMBER ARE FUSED TOGATHER BY SAID PLASTICIZER, SAID COATING STEP COMPRISING INTRODUCING SAID REINFORCING MEMBER INTO A CHAMBER HAVING A MIST OF SAID LIQUID PLASTICIZER THEREIN WHICH SETTLE ON SAID OUTSIDE SURFACE AS A COATING.
Claim 3
Dependent Claim
30 words
A method as set forth in claim 1 and comprising the further step of urging said tube and said reinforcing member together to create a pressure between their adjoining surfaces.
Claim 4
Dependent Claim
56 words
A method as set forth in claim 1 in which said coating step comprises introducing said reinforcing member with its polyvinyl chloride sleeve installed thereover and after said forming step into said chamber having said mist of said liquid plasticizer therein in the form of dioctyl phthalate which settles on said outside surface as said coating.
Claim 5
Dependent Claim
70 words
A method as set forth in claim 3 and comprising the further step of expanding said tube so that its inside surface is arranged concentrically around and spaced from said outside surface of said reinforcing member and said urging step comprises releasing the expanded tube allowing it to contract whereby its inside surface is urged against the outside surface of the sleeve of said reinforcing member with a pressure therebetween.
Claim 6
Independent Claim
133 words
A method of making a reinforced flexible conduit in a continuous uninterrupted manner comprising the steps of, continuously forming a reinforcing member having an outside surface made of a thermoplastic material into a helical pattern, passing the formed reinforcing member through a chamber and treating its entire outside surface with a mist of liquid plasticizer, continuing the coated formed member through an extrusion die, extruding a tube made of a thermoplastic material against and concentrically around said coated outside surface of said member, said extruding step providing simultaneous heating of said tube and its inside surface to thereby accelerate the action of said plasticizer, and passing the assembly defined by said member with the tube extruded thereagainst through a cooling station whereby said tube and reinforcing member are fused together by said plasticizer.
Claim 7
Independent Claim
133 words
A method of making a reinforced flexible conduit in a continuous uninterrupted manner comprising the steps of, continuously forming a reinforcing member having an outside surface made of a thermoplastic material into a helical pattern, passing the formed reinforcing member through a chamber and treating its entire outside surface with a mist of liquid plasticizer, continuing the coated formed member through an extrusion die, extruding a tube made of a thermoplastic material against and concentrically around said coated outside surface of said member, said extruding step providing simultaneous heating of said tube and its inside surface to thereby accelerate the action of said plasticizer, and passing the assembly defined by said member with the tube extruded thereagainst through a cooling station whereby said tube and reinforcing member are fused together by said plasticizer.
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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) | 1978-11-03 | 1979-05-05 | 1979-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-03 | 1983-05-05 | 1983-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-03 | 1987-05-05 | 1987-11-04 | $7700.00 | Window Closed / Lapsed |