Nozzle shut-off valve
US4073944A · kind A · utility
11Cited by
6References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 6, 1976 |
| Grant date | Feb 14, 1978 |
| Priority date | — |
| Expiry date | Jul 6, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7781
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A nozzle shut-off valve for an injection molding machine has a plunger mounted to reciprocate in a bore so as to block the passageway of the plastic through the nozzle, a single-acting pneumatic piston and cylinder to reciprocate the plunger, to block said passageway, and a pilot passage connecting the underside of the plunger to a location upstream of the intersection of the bore and the passageway for plastic through the nozzle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.