Patent US2277912A successfully refreshed from Google Patents.
US3084512A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic molding machines
Assignee: Koehring Co
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Filing: 1958-03-10
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Granted: 1963-04-09
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Expires: 1978-03-10
Abstract
No abstract record available.
Inventors
- 👤 Donald A Huelskamp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:13
CPC Classifications
B; B30; B30B; B30B15/00; B30B15/16; B30B15/161; B29; B29C; B29C45/00; B29C45/17; B29C45/64; B29C45/67; Y; Y10; Y10S; Y10S425/00; Y10S425/223
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
172 words
IN AN APPARATUS OF THE TYPE DESCRIBED, THE COMBINATION COMPRISING, A CLAMP CYLINDER; A MAIN RAM; A BOOSTER RAM HAVING A GENERALLY CYLINDRICAL SHAPE; A BOOSTER RAM HOUSING COACTING WITH SAID BOOSTER RAM TO DEFINE THEREBETWEEN A PREFILL PASSAGE FOR SUPPLY OF PREFILL FLUID TO SAID CYLINDER; SAID BOOSTER RAM HAVING A PLURALITY OF INDEPENDENT CONDUIT MEANS DEFINED THEREIN AXIALLY THEREOF, ONE OF SAID CONDUIT MEANS INCLUDING ONE BRANCH FOR CONDUCTING PRESSURE FLUID TO SAID BOOSTER RAM, AND A SECOND BRANCH INCLUDING RADIALLY EXTENDING BOOSTER PORT MEANS DEFINED IN A MEDICAL PORTION OF SAID RAM; AND A SLEEVE VALVE CIRCUMSCRIBING SAID BOOSTER RAM IN SLIDING ENGAGEMENT THEREWITH ADJACENT SAID BOOSTER PORT AND SELECTIVELY ACTUABLE AXIALLY ALONG SAID BOOSTER RAM INTO AND OUT OF BLOCKING ENGAGEMENT WITH SAID BOOSTER PORT MEANS WHILE SIMULTANEOUSLY OPENING AND CLOSING SAID PREFILL PORT, ANOTHER OF SAID CONDUITS IN SAID BOOSTER RAM BEING CONNECTED FOR APPLYING PILOT PRESSURE TO SAID SLEEVE MEANS FOR SELECTIVELY ACTUATING SAID SLEEVE MEANS INDEPENDENTLY OF THE FLUID PRESSURE IN SAID FIRST-MENTIONED CONDUIT MEANS.
Claim 2
Dependent Claim
172 words
IN AN APPARATUS OF THE TYPE DESCRIBED, THE COMBINATION COMPRISING, A CLAMP CYLINDER; A MAIN RAM; A BOOSTER RAM HAVING A GENERALLY CYLINDRICAL SHAPE; A BOOSTER RAM HOUSING COACTING WITH SAID BOOSTER RAM TO DEFINE THEREBETWEEN A PREFILL PASSAGE FOR SUPPLY OF PREFILL FLUID TO SAID CYLINDER; SAID BOOSTER RAM HAVING A PLURALITY OF INDEPENDENT CONDUIT MEANS DEFINED THEREIN AXIALLY THEREOF, ONE OF SAID CONDUIT MEANS INCLUDING ONE BRANCH FOR CONDUCTING PRESSURE FLUID TO SAID BOOSTER RAM, AND A SECOND BRANCH INCLUDING RADIALLY EXTENDING BOOSTER PORT MEANS DEFINED IN A MEDICAL PORTION OF SAID RAM; AND A SLEEVE VALVE CIRCUMSCRIBING SAID BOOSTER RAM IN SLIDING ENGAGEMENT THEREWITH ADJACENT SAID BOOSTER PORT AND SELECTIVELY ACTUABLE AXIALLY ALONG SAID BOOSTER RAM INTO AND OUT OF BLOCKING ENGAGEMENT WITH SAID BOOSTER PORT MEANS WHILE SIMULTANEOUSLY OPENING AND CLOSING SAID PREFILL PORT, ANOTHER OF SAID CONDUITS IN SAID BOOSTER RAM BEING CONNECTED FOR APPLYING PILOT PRESSURE TO SAID SLEEVE MEANS FOR SELECTIVELY ACTUATING SAID SLEEVE MEANS INDEPENDENTLY OF THE FLUID PRESSURE IN SAID FIRST-MENTIONED CONDUIT MEANS.
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) | 1966-04-08 | 1966-10-08 | 1967-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-08 | 1970-10-08 | 1971-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-08 | 1974-10-08 | 1975-04-09 | $7700.00 | Window Closed / Lapsed |