Core lifter with replaceable breakaway lifter blade coupling arrangement
US11247374B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | May 15, 2019 |
| Grant date | Feb 15, 2022 |
| Priority date | — |
| Expiry date | May 15, 2039 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C2045/363
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A core lifter having a lifter bar assembly formed of an elongate lifter bar with a replaceable lifter bar extension coupling carrying a coupling ball pivotably, rotatably, and translationally coupled to a lifter base fixed to an ejector plate of a plastic injection molding apparatus, the bar extension coupling removably coupled to the bar by a coupling joint configured to automatically self-align the bar relative to the base and mold in which the bar extends in a direction generally orthogonal to a lengthwise extent of the bar. Bar extension coupling is formed of an extension link having one end carrying the ball and an opposite end slidably coupled to an end of the bar by coupling joint. A preferred extension link is of breakaway sacrificial construction and slidably attached to the bar via a coupling joint that is a floating dovetail joint.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.