Patent US3137921A successfully refreshed from Google Patents.
US3137921A
Expired / Lapsed
US
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Method of forming a sectional, stamped metal hold-down anchor device for the cables of prestressed concrete girders
Assignee: Superior Concrete Accessories Inc
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Filing: 1961-07-31
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Granted: 1964-06-23
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Expires: 1981-07-31
Abstract
No abstract record available.
Inventors
- 👤 Hillberg Emma
- 👤 Alvis Jean Elizabeth
- 👤 And Continental Illinois Bank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:33
CPC Classifications
E; E04; E04C; E04C5/00; E04C5/08; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49616; Y10T29/49623; Y10T29/49826; Y10T29/49893
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
204 words
THE METHOD OF MAKING A HOLD-DOWN ANCHOR DEVICE OF THE TYPE HAVING A CENTRAL TUBULAR HUB FROM WHICH THERE EXTEND OUTWARDLY IN RADIAL FASHION IN OPPOSITE DIRECTIONS FROM THE OPPOSITE SIDES THEREOF A PAIR OF FLAT SIDE WINGS EACH OF WHICH IS FORMED WITH A CABLE-RECEIVING NOTCH THEREIN EXTENDING INWARDLY FROM ITS OUTER EDGE, THE BOTTOM EDGE OF THE NOTCH BEING SEMI-CIRCULAR WITH THE OPPOSITE RIMS OF THE NOTCH ALONG THE SEMI-CIRCULAR BOTTOM EDGE THEREOF BEING RELIEVED ON A CURVED BIAS TO ENHANCE THE ANTI-FRICTIONAL CHARACTERISTICS OF A CABLE STRAND UNDERGOING AXIAL SLIDING MOVEMENT THROUGH THE NOTCH, SAID METHOD COMPRISING UTILIZING A FIRST PAIR OF FORMING DIES TO DEFORM THE MEDIAL REGION OF A FLAT RECTANGULAR METAL BLANK BETWEEN THE LONGITUDINAL SIDE EDGES THEREOF AND PRODUCE A SEMI-CYLINDRICAL HALF-HUB FROM WHICH THERE EXTEND OUTWARDLY IN RADIAL FASHION IN OPPOSITE DIRECTIONS FROM THE LONGITUDINAL EDGES OF THE HALF-HUB A PAIR OF FLAT SIDE WING FRAGMENTS; UTILIZING A SECOND PAIR OF FORMING DIES TO PUNCH A CIRCULAR HOLE IN EACH OF SAID SIDE WING FRAGMENTS AND, IN THE SAME OPERATION, COIN THE RIM OF THE HOLE WHICH IS ON THE SIDE OF THE FRAGMENT FROM WHICH THE HALF-HUB PROJECTS AND THUS PRODUCE A CLOSED BEVELLED SUR-
Claim 2
Independent Claim
204 words
THE METHOD OF MAKING A HOLD-DOWN ANCHOR DEVICE OF THE TYPE HAVING A CENTRAL TUBULAR HUB FROM WHICH THERE EXTEND OUTWARDLY IN RADIAL FASHION IN OPPOSITE DIRECTIONS FROM THE OPPOSITE SIDES THEREOF A PAIR OF FLAT SIDE WINGS EACH OF WHICH IS FORMED WITH A CABLE-RECEIVING NOTCH THEREIN EXTENDING INWARDLY FROM ITS OUTER EDGE, THE BOTTOM EDGE OF THE NOTCH BEING SEMI-CIRCULAR WITH THE OPPOSITE RIMS OF THE NOTCH ALONG THE SEMI-CIRCULAR BOTTOM EDGE THEREOF BEING RELIEVED ON A CURVED BIAS TO ENHANCE THE ANTI-FRICTIONAL CHARACTERISTICS OF A CABLE STRAND UNDERGOING AXIAL SLIDING MOVEMENT THROUGH THE NOTCH, SAID METHOD COMPRISING UTILIZING A FIRST PAIR OF FORMING DIES TO DEFORM THE MEDIAL REGION OF A FLAT RECTANGULAR METAL BLANK BETWEEN THE LONGITUDINAL SIDE EDGES THEREOF AND PRODUCE A SEMI-CYLINDRICAL HALF-HUB FROM WHICH THERE EXTEND OUTWARDLY IN RADIAL FASHION IN OPPOSITE DIRECTIONS FROM THE LONGITUDINAL EDGES OF THE HALF-HUB A PAIR OF FLAT SIDE WING FRAGMENTS; UTILIZING A SECOND PAIR OF FORMING DIES TO PUNCH A CIRCULAR HOLE IN EACH OF SAID SIDE WING FRAGMENTS AND, IN THE SAME OPERATION, COIN THE RIM OF THE HOLE WHICH IS ON THE SIDE OF THE FRAGMENT FROM WHICH THE HALF-HUB PROJECTS AND THUS PRODUCE A CLOSED BEVELLED SUR-
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) | 1967-06-23 | 1967-12-23 | 1968-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-23 | 1971-12-23 | 1972-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-23 | 1975-12-23 | 1976-06-23 | $7700.00 | Window Closed / Lapsed |