US3279739A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expandable core-former
Assignee: LONG CONSTRUCTION CO
•
Filing: 1965-07-19
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Granted: 1966-10-18
•
Expires: 1985-07-19
Abstract
No abstract record available.
Inventors
- 👤 Leonard D Long
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:41
CPC Classifications
B; B28; B28B; B28B7/00; B28B7/28; B28B7/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
152 words
AN EXPANDABLE CORE-FORMER, COMPRISING A PLURALITY OF CORE SEGMENTS MOVABLE WITH RESPECT TO EACH OTHER, A FIRST SHAFT MOVABLE FOR MOVING THE CORE-FORMER TO AND FROM AN OPERATIVE POSITION IN A MOLD AND HAVING A SLEEVE PROVIDED WITH END BLOCKS FIXEDLY MOUNTED THEREON AND INTERPOSED BETWEEN SAID CORE SEGMENTS, A SECOND SHAFT ROTATABLY CARRIED IN SAID FIRST SHAFT AND HAVING CAM MEANS DISPOSED WITHIN SAID SLEEVE AND EXTENDING BETWEEN SAID END BLOCKS, A PLURALITY OF CAM FOLLOWERS EXTENDING THE LENGTH OF SAID CAM MEANS FIXEDLY MOUNTED ON SAID CORE SEGMENTS AND SLIDABLY RECEIVED IN SLOTS IN SAID SLEEVE FOR ENGAGEMENT WITH SAID CAM MEANS ALONG THE LENGTH THEREOF UPON ROTATION OF SAID SECOND SHAFT IN ONE DIRECTION TO FORCE SAID CORE SEGMENTS OUTWARDLY WITH RESPECT TO EACH OTHER TO EXPAND THE CORE-FORMER, MEANS OPERATIVELY INTERCONNECTING SAID CORE SEGMENTS TO SAID SLEEVE IN ALIGNMENT WITH SAID CAM FOLLOWERS BEYOND THE ENDS OF SAID
Claim 2
Dependent Claim
152 words
AN EXPANDABLE CORE-FORMER, COMPRISING A PLURALITY OF CORE SEGMENTS MOVABLE WITH RESPECT TO EACH OTHER, A FIRST SHAFT MOVABLE FOR MOVING THE CORE-FORMER TO AND FROM AN OPERATIVE POSITION IN A MOLD AND HAVING A SLEEVE PROVIDED WITH END BLOCKS FIXEDLY MOUNTED THEREON AND INTERPOSED BETWEEN SAID CORE SEGMENTS, A SECOND SHAFT ROTATABLY CARRIED IN SAID FIRST SHAFT AND HAVING CAM MEANS DISPOSED WITHIN SAID SLEEVE AND EXTENDING BETWEEN SAID END BLOCKS, A PLURALITY OF CAM FOLLOWERS EXTENDING THE LENGTH OF SAID CAM MEANS FIXEDLY MOUNTED ON SAID CORE SEGMENTS AND SLIDABLY RECEIVED IN SLOTS IN SAID SLEEVE FOR ENGAGEMENT WITH SAID CAM MEANS ALONG THE LENGTH THEREOF UPON ROTATION OF SAID SECOND SHAFT IN ONE DIRECTION TO FORCE SAID CORE SEGMENTS OUTWARDLY WITH RESPECT TO EACH OTHER TO EXPAND THE CORE-FORMER, MEANS OPERATIVELY INTERCONNECTING SAID CORE SEGMENTS TO SAID SLEEVE IN ALIGNMENT WITH SAID CAM FOLLOWERS BEYOND THE ENDS OF SAID
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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) | 1969-10-17 | 1970-04-18 | 1970-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-17 | 1974-04-18 | 1974-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-17 | 1978-04-18 | 1978-10-18 | $7700.00 | Window Closed / Lapsed |