Patent US6138330A successfully refreshed from Google Patents.
Patent US3099861A successfully refreshed from Google Patents.
US3099861A
Expired / Lapsed
US
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Injection moulding machine
Assignee: Projectile & Engineering Co Ltd
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Filing: 1960-11-04
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Granted: 1963-08-06
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Expires: 1980-11-04
Abstract
No abstract record available.
Inventors
- 👤 Gaspar Emeric
- 👤 Munns Michael George
- 👤 Butler Richard Austin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:08
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/17; B29C45/46; B29C45/47; B29C45/50; B29C45/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
163 words
INJECTION MOULDING MECHANISM COMPRISING IN COMBINATION A CYLINDRICAL PLASTICISING CHAMBER HAVING AN INLET FOR GRANULAR MATERIAL AT ONE END AND AN OUTLET FOR PLASTICISED MATERIAL AT THE OTHER END, A FEED SCREW MOUNTED WITHIN THE CHAMBER FOR ROTATION AND RECIPROCATION AND HAVING THEREON A SCREW THREAD WHICH FITS THE INTERIOR OF THE CHAMBER, A PISTON HEAD RIGID WITH THE FEED SCREW WHICH HEAD IS LOCATED NEAR THE OUTLET END OF THE CHAMBER AND IS A SLIDING FIT IN THE CHAMBER, THE CHAMBER HAVING A TAPERED PORTION ADJACENT ITS OUTLET END, AND THE FEED SCREW BETWEEN SAID PISTON HEAD AND THE SAID OUTLET HAVING A SIMILARLY TAPERED NOSE, A PASSAGE EXTENDING THROUGH THE PISTON HEAD FROM AN INLET END ON ONE AXIAL SIDE OF THE PISTON HEAD IN AN INCLINED TANGENTIAL DIRECTION TO AN OUTLET END ON THE OPPOSITE AXIAL SIDE OF SUCH PISTON HEAD AND NEAR THE BASE OF SAID TAPERED PORTION, AND A NON-RETURN VALVE IN SAID PASSAGE AT THE OUTLET END.
Claim 2
Dependent Claim
163 words
INJECTION MOULDING MECHANISM COMPRISING IN COMBINATION A CYLINDRICAL PLASTICISING CHAMBER HAVING AN INLET FOR GRANULAR MATERIAL AT ONE END AND AN OUTLET FOR PLASTICISED MATERIAL AT THE OTHER END, A FEED SCREW MOUNTED WITHIN THE CHAMBER FOR ROTATION AND RECIPROCATION AND HAVING THEREON A SCREW THREAD WHICH FITS THE INTERIOR OF THE CHAMBER, A PISTON HEAD RIGID WITH THE FEED SCREW WHICH HEAD IS LOCATED NEAR THE OUTLET END OF THE CHAMBER AND IS A SLIDING FIT IN THE CHAMBER, THE CHAMBER HAVING A TAPERED PORTION ADJACENT ITS OUTLET END, AND THE FEED SCREW BETWEEN SAID PISTON HEAD AND THE SAID OUTLET HAVING A SIMILARLY TAPERED NOSE, A PASSAGE EXTENDING THROUGH THE PISTON HEAD FROM AN INLET END ON ONE AXIAL SIDE OF THE PISTON HEAD IN AN INCLINED TANGENTIAL DIRECTION TO AN OUTLET END ON THE OPPOSITE AXIAL SIDE OF SUCH PISTON HEAD AND NEAR THE BASE OF SAID TAPERED PORTION, AND A NON-RETURN VALVE IN SAID PASSAGE AT THE OUTLET END.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-08-05 | 1967-02-04 | 1967-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-08-05 | 1971-02-04 | 1971-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-08-05 | 1975-02-04 | 1975-08-06 | $7700.00 | Window Closed / Lapsed |