Patent GB426481A successfully refreshed from Google Patents.
US5302336A
Expired / Lapsed
US
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Method for producing molded hose branches from rubber and a hose produced by the method
Assignee: Metzeler Automotive Profiles GmbH
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Filing: 1991-12-19
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Granted: 1994-04-12
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Expires: 2011-12-19
Abstract
Abstract A method for producing molded hose branches of rubber and a molded hose branch produced according to the method, includes slipping completely vulcanized rubber hose lengths with ends onto free ends of a plastic tubing branching piece for forming an assembly, placing the assembly into a mold, and injection molding a thermoplastic rubber material in the form of a blended mixture of polypropylene and EPDM around the assembly for joining the thermoplastic material to the rubber hose lengths for forming a sleeve around the rubber hose lengths and free parts of the tubing branching piece between the ends of the rubber hose lengths.
Inventors
- 👤 Volker Hartel
- 👤 Carl Heynemann
- 👤 Hermann Kahlefeld
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:41
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/12; C08J5/124; C08J5/128; B; B29; B29C; B29C45/00; B29C45/14; B29C45/14467; B29C45/14598; B29C45/14614; F; F16; F16L; F16L31/00; F16L31/02
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
93 words
Method for producing flexible molded hose branches of rubber, which comprises slipping three completely vulcanized rubber hose lengths with ends onto free ends of a T-shaped plastic tubing branching piece for forming an assembly, placing the assembly into a mold, and injection molding a thermoplastic rubber material being a blended mixture of polypropylene and EPDM around the assembly for joining the thermoplastic material to the rubber hose lengths for forming a sleeve around the rubber hose lengths and free parts of the tubing branching piece between the ends of the rubber hose lengths.
Claim 2
Dependent Claim
93 words
Method for producing flexible molded hose branches of rubber, which comprises slipping three completely vulcanized rubber hose lengths with ends onto free ends of a T-shaped plastic tubing branching piece for forming an assembly, placing the assembly into a mold, and injection molding a thermoplastic rubber material being a blended mixture of polypropylene and EPDM around the assembly for joining the thermoplastic material to the rubber hose lengths for forming a sleeve around the rubber hose lengths and free parts of the tubing branching piece between the ends of the rubber hose lengths.
Claim 3
Dependent Claim
18 words
Method according to claim 1, which comprises selecting EPDM rubber as the material for the rubber hose lengths.
Claim 4
Dependent Claim
34 words
Method according to claim 1, which comprises locking the tubing branching piece to the slipped-on rubber hose lengths with an encompassing, substantially sawtooth-shaped rib on the free tube ends of the tubing branching piece.
Claim 5
Dependent Claim
45 words
Method according to claim 3, which comprises vulcanizing hose end pieces having the same shape as the free ends of the tubing branching piece onto the rubber hose lengths prior to slipping the rubber hose lengths onto the free ends of the tubing branching piece.
References Cited (Backward Citations)
US3458619A
Cited
US4650220A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-04-11 | 1997-10-11 | 1998-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-04-11 | 2001-10-11 | 2002-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-04-11 | 2005-10-11 | 2006-04-12 | $7700.00 | Window Closed / Lapsed |