Patent US2739829A successfully refreshed from Google Patents.
US2739829A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic pipe joint
Assignee: Akzo Nobel UK PLC
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Filing: 1950-08-05
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Granted: 1956-03-27
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Expires: 1970-08-05
Abstract
No abstract record available.
Inventors
- 👤 Pedlow John Watson
- 👤 Lester B Cundiff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:46
CPC Classifications
F; F16; F16L; F16L47/00; F16L47/02; F16L47/03; B; B29; B29C; B29C65/00; B29C65/02; B29C65/34; B29C65/36; B29C65/3604; B29C65/364; B29C65/3644; B29C65/3648; B29C65/3672; B29C65/3676; B29C65/66; B29C65/68; B29C65/72; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/114; B29C66/1142; B29C66/12; B29C66/122; B29C66/1222; B29C66/1226; B29C66/50; B29C66/51; B29C66/52; B29C66/522; B29C66/5221; B29C66/5223; B29C66/52231; B29C66/5229; B29C66/52291; B29C66/52292; B29C66/52298; B29C66/70; B29C66/73; B29C66/739; B29C66/7392; B29C66/73921; B29C66/80; B29C66/84; B29C66/841; B29C66/8414; B29C66/71; Y; Y10; Y10S; Y10S174/00; Y10S174/08; Y10S285/00; Y10S285/919; Y10S285/923; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/49865
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
115 words
A METHOD OF CONNECTING THE ENDS OF TUBES FORMED FROM AN ORGANIC THERMOPLASTIC MATERIAL, THE STEPS THEREOF COMPRISING ENLARGING A SECTION OF TUBING FORMED FROM THE MATERIAL WHICH HAS A NORMAL INSIDE DIAMETER SMALLER THAN THE EXTERNAL DIAMETERS OF THE TUBE ENDS TO A DIAMETER SLIGHTLY GREATER THAN SAID EXTERNAL DIAMETERS, PLACING CLOSELY-FITTING METALLIC BANDS ABOUT PORTIONS OF THE TUBES ADJACENT SAID ENDS WHICH CONTINUOUSLY ENCIRCLE RESPECTIVE TUBES, INSERTING THE END PORTIONS OF THE TUBES INCLUDING THE BANDS SUPPORTED THEREON INTO THE SECTION OF TUBING, SHRINKING THE SECTION AROUND SAID END PORTIONS AND THE BANDS, HEATING THE BANDS INDUCTIVELY TO FUSE THE MATERIAL OF THE SECTION AND THE PORTIONS OF THE TUBES ADJACENT THE BANDS.
Claim 2
Independent Claim
115 words
A METHOD OF CONNECTING THE ENDS OF TUBES FORMED FROM AN ORGANIC THERMOPLASTIC MATERIAL, THE STEPS THEREOF COMPRISING ENLARGING A SECTION OF TUBING FORMED FROM THE MATERIAL WHICH HAS A NORMAL INSIDE DIAMETER SMALLER THAN THE EXTERNAL DIAMETERS OF THE TUBE ENDS TO A DIAMETER SLIGHTLY GREATER THAN SAID EXTERNAL DIAMETERS, PLACING CLOSELY-FITTING METALLIC BANDS ABOUT PORTIONS OF THE TUBES ADJACENT SAID ENDS WHICH CONTINUOUSLY ENCIRCLE RESPECTIVE TUBES, INSERTING THE END PORTIONS OF THE TUBES INCLUDING THE BANDS SUPPORTED THEREON INTO THE SECTION OF TUBING, SHRINKING THE SECTION AROUND SAID END PORTIONS AND THE BANDS, HEATING THE BANDS INDUCTIVELY TO FUSE THE MATERIAL OF THE SECTION AND THE PORTIONS OF THE TUBES ADJACENT THE BANDS.
Claim 3
Dependent Claim
197 words
A JOINT FOR CONNECTING TWO TUBES OF ORGANIC THERMOPLASTIC MATERIAL COMPRISING A METALLIC ELEMENT FITTING TIGHTLY AROUND AND END PORTION OF ONE OF THE TUBES, THE END PORTION OF THE OTHER TUBE EXTENDING IN EXTERIOR TELESCOPIC RELATIONSHIP TO SAID END PORTION OF THE FIRST TUBE AND THE ELEMENT EXTENDING THEREAROUND, THE MATERIAL OF THE SECOND TUBE BEING ABSORBENT WITH RESPECT TO A VOLATILE TUBE, THE DIAMETER OF SAID PORTION OF THE SECOND TUBE BEING EQUAL TO OR GREATER THAN THE OUTSIDE DIAMETERS OF SAID PORTION OF THE FIRST TUBE AND THE ELEMENT WHEN SWOLLEN BY THE SWELLING AGENT, AND THE NORMAL INSIDE DIAMETER OF SAID PORTION OF THE SECOND TUBE IN A FREE CONDITION BEING LESS THAN THE OUTSIDE DIAMETER OF SAID PORTION OF THE FIRST TUBE WHEN THE SECOND TUBE IS SUBSTANTIALLY FREE OF THE SWELLINF AGENT, SAID PORTION OF THE SECOND TUBE EXTENDING TIGHTLY AROUND THE FIRST TUBE WITH THE ELEMENT EMBEDDED IN ADJACENT SURFACES OF THE OVERLAPPING PORTIONS, SAID ELEMENT EXTENDING CONTINUOUSLY AROUND THE FIRST TUBE WHEREBY IT MAY BE INDUCTIVELY HEATED, THE MATERIAL OF SAID TUBES IN ENGAGEMENT WITH THE ELEMENT BEING FUSED THERETO AS THE RESULT OF INDUCTIVE HEATING OF SAID ELEMENT.
Claim 4
Dependent Claim
197 words
A JOINT FOR CONNECTING TWO TUBES OF ORGANIC THERMOPLASTIC MATERIAL COMPRISING A METALLIC ELEMENT FITTING TIGHTLY AROUND AND END PORTION OF ONE OF THE TUBES, THE END PORTION OF THE OTHER TUBE EXTENDING IN EXTERIOR TELESCOPIC RELATIONSHIP TO SAID END PORTION OF THE FIRST TUBE AND THE ELEMENT EXTENDING THEREAROUND, THE MATERIAL OF THE SECOND TUBE BEING ABSORBENT WITH RESPECT TO A VOLATILE TUBE, THE DIAMETER OF SAID PORTION OF THE SECOND TUBE BEING EQUAL TO OR GREATER THAN THE OUTSIDE DIAMETERS OF SAID PORTION OF THE FIRST TUBE AND THE ELEMENT WHEN SWOLLEN BY THE SWELLING AGENT, AND THE NORMAL INSIDE DIAMETER OF SAID PORTION OF THE SECOND TUBE IN A FREE CONDITION BEING LESS THAN THE OUTSIDE DIAMETER OF SAID PORTION OF THE FIRST TUBE WHEN THE SECOND TUBE IS SUBSTANTIALLY FREE OF THE SWELLINF AGENT, SAID PORTION OF THE SECOND TUBE EXTENDING TIGHTLY AROUND THE FIRST TUBE WITH THE ELEMENT EMBEDDED IN ADJACENT SURFACES OF THE OVERLAPPING PORTIONS, SAID ELEMENT EXTENDING CONTINUOUSLY AROUND THE FIRST TUBE WHEREBY IT MAY BE INDUCTIVELY HEATED, THE MATERIAL OF SAID TUBES IN ENGAGEMENT WITH THE ELEMENT BEING FUSED THERETO AS THE RESULT OF INDUCTIVE HEATING OF SAID ELEMENT.
References Cited (Backward Citations)
US414686A
Cited
US916076A
Cited
US1369991A
Cited
GB252516A
Cited
US2027962A
Cited
US2249091A
Cited
US2167865A
Cited
US2252299A
Cited
US2372929A
Cited
US2379990A
Cited
US2356902A
Cited
US2416357A
Cited
GB638687A
Cited
US2450956A
Cited
US2565316A
Cited
US2473879A
Cited
US2542702A
Cited
US2577466A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-03-27 | 1959-09-26 | 1960-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-27 | 1963-09-26 | 1964-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-27 | 1967-09-26 | 1968-03-27 | $7700.00 | Window Closed / Lapsed |