Mold apparatus for forming grooves in tire shoulder
US8186985B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 18, 2010 |
| Grant date | May 29, 2012 |
| Priority date | — |
| Expiry date | Jan 29, 2031 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29D2030/061
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A mold device is described for use in a mold having a plurality of tread molding segments. Each tread molding segment has an end face for mating with an adjoining segment. The mold device includes a piston located on the segment end face and is actuated by the opening and closing of the mold. Each of the mold segments further includes a retractable blade assembly having a first and second chamber; wherein the piston is positioned within the first chamber and having a plunger end in communication with a temperature sensitive block of material and a spring. The first chamber is in fluid communication with a second chamber, wherein said second chamber further comprises a retractable blade mounted within a blade collar wherein the blade collar is slidably received within said second chamber; said second chamber further comprises a temperature sensitive block of material and a spring.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.