Method of making plastic part having parting line free O-ring groove for fluid outlet
US5804123A · kind A · utility
9Cited by
14References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 5, 1994 |
| Grant date | Sep 8, 1998 |
| Priority date | — |
| Expiry date | May 5, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S425/058
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A plastic molded part having a parting line free O-ring groove formed on a tubular portion of the part is made by molding the groove utilizing cooperating inner and outer axially moveable die portions in which an inner die member is withdrawn from the tubular plastic just before the outer die member is withdrawn, with the withdrawal of the members occurring after the plastic has begun to set but before it has assumed its final cure, whereby the plastic may flex inwardly as the outer die is withdrawn and then may spring back outwardly to its proper position for final cure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.