Patent NL42064C successfully refreshed from Google Patents.
Patent US3371386A successfully refreshed from Google Patents.
US3371386A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Injection apparatus with pressure regulation
Assignee: Individual
•
Filing: 1966-03-31
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Granted: 1968-03-05
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Expires: 1986-03-31
Abstract
No abstract record available.
Inventors
- 👤 Ludwig Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:54
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/17; B29C45/76; B29C45/77
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
214 words
IN INJECTION APPARATUS COMPRISING A BARREL WITHIN WHICH THERE IS MOUNTED A SCREW WHICH IS BOTH ROTATABLE IN THE BARREL AND RECIPROCABLE THEREIN TO EFFECT PLASTICIZATION AND EJECTION OF AN ELASTOMER IN AND FROM THE BARREL, SAID SCREW AT ITS REAR END PROJECTING INTO A MOTOR CYLINDER AND HAVING ON IT A PISTON FITTING SAID MOTOR CYLINDER, AND SAID MOTOR CYLINDER BEING PROVIDED AT ITS OPPOSITE END WITH CONDUCTORS BY MEANS OF WHICH A PRESSURE FLUID IS ALTERNATELY SUPPLIED FROM A SOURCE OF PRESSURE FLUID TO ONE SIDE OR THE OTHER OF THE PISTON AND VENTED FROM THE OPPOSITE TO A SUMP; MEANS FOR LIMITING INJECTION PRESSURE TO A PREDETERMINED MAXIMUM, COMPRISING A SLIDE VALVE OPERABLE, IN ONE POSITION, TO CONNECT THE CONDUCTORS, RESPECTIVELY, TO SAID SOURCE OF PRESSURE FLUID AND TO SAID SUMP TO SUPPLY FLUID PRESSURE TO ONE SIDE OF THE PISTON AND VENT THE OTHER, AND IN ANOTHER POSITION TO REVERSE THE CONNECTIONS, PRESSURE-RESPONSIVE MEANS CONNECTED TO THE MOTOR CYLINDER AT SAID REAR SIDE OF THE PISTON RESPONSIVE TO A PRESSURE IN EXCESS OF SAID PREDETERMINED MAXIMUM TO EFFECT SHIFTING OF THE SLIDE VALVE TO SUPPLY FLUID PRESSURE TO THE MOTOR CYLINDER AT THE FRONT SIDE OF THE PISTON AND TO VENT SAID REAR SIDE, AND MEANS FOR DELAYING THE OPER-
Claim 2
Dependent Claim
214 words
IN INJECTION APPARATUS COMPRISING A BARREL WITHIN WHICH THERE IS MOUNTED A SCREW WHICH IS BOTH ROTATABLE IN THE BARREL AND RECIPROCABLE THEREIN TO EFFECT PLASTICIZATION AND EJECTION OF AN ELASTOMER IN AND FROM THE BARREL, SAID SCREW AT ITS REAR END PROJECTING INTO A MOTOR CYLINDER AND HAVING ON IT A PISTON FITTING SAID MOTOR CYLINDER, AND SAID MOTOR CYLINDER BEING PROVIDED AT ITS OPPOSITE END WITH CONDUCTORS BY MEANS OF WHICH A PRESSURE FLUID IS ALTERNATELY SUPPLIED FROM A SOURCE OF PRESSURE FLUID TO ONE SIDE OR THE OTHER OF THE PISTON AND VENTED FROM THE OPPOSITE TO A SUMP; MEANS FOR LIMITING INJECTION PRESSURE TO A PREDETERMINED MAXIMUM, COMPRISING A SLIDE VALVE OPERABLE, IN ONE POSITION, TO CONNECT THE CONDUCTORS, RESPECTIVELY, TO SAID SOURCE OF PRESSURE FLUID AND TO SAID SUMP TO SUPPLY FLUID PRESSURE TO ONE SIDE OF THE PISTON AND VENT THE OTHER, AND IN ANOTHER POSITION TO REVERSE THE CONNECTIONS, PRESSURE-RESPONSIVE MEANS CONNECTED TO THE MOTOR CYLINDER AT SAID REAR SIDE OF THE PISTON RESPONSIVE TO A PRESSURE IN EXCESS OF SAID PREDETERMINED MAXIMUM TO EFFECT SHIFTING OF THE SLIDE VALVE TO SUPPLY FLUID PRESSURE TO THE MOTOR CYLINDER AT THE FRONT SIDE OF THE PISTON AND TO VENT SAID REAR SIDE, AND MEANS FOR DELAYING THE OPER-
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) | 1971-03-05 | 1971-09-04 | 1972-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-05 | 1975-09-04 | 1976-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-05 | 1979-09-04 | 1980-03-05 | $7700.00 | Window Closed / Lapsed |