US3179981A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Injection moulding machines
Assignee: Individual
•
Filing: 1962-04-23
•
Granted: 1965-04-27
•
Expires: 1982-04-23
Abstract
No abstract record available.
Inventors
- 👤 Gravesen Carl Christian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:55
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/17; B29C45/70; Y; Y10; Y10S; Y10S425/00; Y10S425/812
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
AN INJECTION MOLDING MACHINE COMPRISING TWO MOLD PARTS ONE OF WHICH CARRIERS AN INJECTION HEAD, AN INJECTION PLUNGER OPERABLE IN SAID HEAD UPON CLOSURE OF TWO MOLD PARTS ONE UPON THE OTHER, A POWER CYLINDER, A PISTON MOVABLE IN SAID CYLINDER, A PISTON ROD CARRIED BY SAID PISTON, TOGGLE MEANS OPERATIVELY INTERPOSED BETEWEN SAID ROD AND SAID PLUNGER, MEANS FOR EXTENDING SAID TOGGLE TO INITIATE THE EFFECTIVE MOVEMENT OF SAID PLUNGER, MEANS PLACING THE PORTION OF THE CYLINDER BEHIND SAID PISTON IN COMMUNICATION WITH A PRESSURE ACCUMULATING CONTAINER, MEANS FOR VENTING THE FORWARD PORTION OF SAID CYLINDER AFTER SAID TOGGLE HAS BEEN MADE TO COMPLETE THE INJECTION MOVEMENT OF SAID PLUNGER, AND MEANS FOR BREAKING SAID TOGGLE AND FOR MOVING SAID PISTON REARWARDLY IN SAID CYLINDER AND REPLENISHING SAID PRESSURE ACCUMULATING CONTAINER FOR PROVIDING POWER FOR THE PISTON FOR THE NEXT INJECTOR CYCLE.
Claim 2
Dependent Claim
143 words
AN INJECTION MOLDING MACHINE COMPRISING TWO MOLD PARTS ONE OF WHICH CARRIERS AN INJECTION HEAD, AN INJECTION PLUNGER OPERABLE IN SAID HEAD UPON CLOSURE OF TWO MOLD PARTS ONE UPON THE OTHER, A POWER CYLINDER, A PISTON MOVABLE IN SAID CYLINDER, A PISTON ROD CARRIED BY SAID PISTON, TOGGLE MEANS OPERATIVELY INTERPOSED BETEWEN SAID ROD AND SAID PLUNGER, MEANS FOR EXTENDING SAID TOGGLE TO INITIATE THE EFFECTIVE MOVEMENT OF SAID PLUNGER, MEANS PLACING THE PORTION OF THE CYLINDER BEHIND SAID PISTON IN COMMUNICATION WITH A PRESSURE ACCUMULATING CONTAINER, MEANS FOR VENTING THE FORWARD PORTION OF SAID CYLINDER AFTER SAID TOGGLE HAS BEEN MADE TO COMPLETE THE INJECTION MOVEMENT OF SAID PLUNGER, AND MEANS FOR BREAKING SAID TOGGLE AND FOR MOVING SAID PISTON REARWARDLY IN SAID CYLINDER AND REPLENISHING SAID PRESSURE ACCUMULATING CONTAINER FOR PROVIDING POWER FOR THE PISTON FOR THE NEXT INJECTOR CYCLE.
References Cited (Backward Citations)
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US2479433A
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US2460468A
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US2585112A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-04-26 | 1968-10-26 | 1969-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-26 | 1972-10-26 | 1973-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-26 | 1976-10-26 | 1977-04-27 | $7700.00 | Window Closed / Lapsed |