US3327474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic driving device for tools or the like, particularly for the movable mold parts of plastic die casting machines
Assignee: Individual
•
Filing: 1965-10-22
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Granted: 1967-06-27
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Expires: 1985-10-22
Abstract
No abstract record available.
Inventors
- 👤 Schiffer Maximilian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:50
CPC Classifications
F; F15; F15B; F15B11/00; F15B11/02; F15B11/028; F15B11/032; F15B11/0325; B; B29; B29C; B29C45/00; B29C45/17; B29C45/64; B29C45/67; B29C45/6764; F15B2211/00; F15B2211/20; F15B2211/205; F15B2211/2053; F15B2211/20538; F15B2211/30; F15B2211/305; F15B2211/30505; F15B2211/30525; F15B2211/70; F15B2211/705; F15B2211/7051; F15B2211/7055; F15B2211/775
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
200 words
A HYDRAULIC DRIVING DEVICE FOR TOOLS OR THE LIKE, OF THE TYPE WHICH OPERATE IN A THREE-PART CYCLE, NAMELY, A FORWARD STROKE, IN WHICH THE TOOL IS DRIVEN FROM AN OPEN POSITION TO A CLOSED POSITION, A MIDDLE PORTION DURING WHICH GREAT FORCE IS EXERTED, AND A BACK STROKE IN WHICH THE TOOL IS MOVED FROM THE CLOSED POSITION TO THE OPEN POSITION; THE TOOL BEING CONNECTED BY A PISTON ROD WITH A PISTON TRAVELING IN A MAIN CYLINDER, INTO ONE SIDE OF WHICH (THE SIDE FROM WHICH THE PISTON ROD PROJECTS) OPENS A FORWARD-STROKE OIL CONDUIT AND INTO THE OTHER SIDE OF WHICH OPENS A BACK STROKE CONDUIT, THE CONDUITS BEING CONNECTABLE BY MEANS OF A CONTROL DEVICE HAVING SEVERAL CONTROL PISTONS WITH A SOURCE OF PRESSURE OIL OR AN OIL SUMP, SELECTIVELY, CHARACTERIZED BY THE FACTS THAT: (1) THE PISTON CARRIES ON ITS SIDE TURNED AWAY FROM THE PISTON ROD AN AUXILIARY PISTON; (2) THE AUXILIARY PISTON TRAVELS IN AN AUXILIARY CYLINDER; INTO WHICH A BACK-STROKE AUXILIARY OIL CONDUIT OPENS; (3) THE DIAMETER OF THE AUXILIARY PISTON IS LARGER THAN THE DIAMETER OF THE PISTON ROD; (4) THE CONTROL DEVICE IS ADJUSTABLE BETWEEN AT LEAST THREE DIFFERENT POSITIONS;
Claim 2
Dependent Claim
200 words
A HYDRAULIC DRIVING DEVICE FOR TOOLS OR THE LIKE, OF THE TYPE WHICH OPERATE IN A THREE-PART CYCLE, NAMELY, A FORWARD STROKE, IN WHICH THE TOOL IS DRIVEN FROM AN OPEN POSITION TO A CLOSED POSITION, A MIDDLE PORTION DURING WHICH GREAT FORCE IS EXERTED, AND A BACK STROKE IN WHICH THE TOOL IS MOVED FROM THE CLOSED POSITION TO THE OPEN POSITION; THE TOOL BEING CONNECTED BY A PISTON ROD WITH A PISTON TRAVELING IN A MAIN CYLINDER, INTO ONE SIDE OF WHICH (THE SIDE FROM WHICH THE PISTON ROD PROJECTS) OPENS A FORWARD-STROKE OIL CONDUIT AND INTO THE OTHER SIDE OF WHICH OPENS A BACK STROKE CONDUIT, THE CONDUITS BEING CONNECTABLE BY MEANS OF A CONTROL DEVICE HAVING SEVERAL CONTROL PISTONS WITH A SOURCE OF PRESSURE OIL OR AN OIL SUMP, SELECTIVELY, CHARACTERIZED BY THE FACTS THAT: (1) THE PISTON CARRIES ON ITS SIDE TURNED AWAY FROM THE PISTON ROD AN AUXILIARY PISTON; (2) THE AUXILIARY PISTON TRAVELS IN AN AUXILIARY CYLINDER; INTO WHICH A BACK-STROKE AUXILIARY OIL CONDUIT OPENS; (3) THE DIAMETER OF THE AUXILIARY PISTON IS LARGER THAN THE DIAMETER OF THE PISTON ROD; (4) THE CONTROL DEVICE IS ADJUSTABLE BETWEEN AT LEAST THREE DIFFERENT POSITIONS;
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) | 1970-06-26 | 1970-12-26 | 1971-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-26 | 1974-12-26 | 1975-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-26 | 1978-12-26 | 1979-06-27 | $7700.00 | Window Closed / Lapsed |