Apparatus for laying concrete planks with exposed aggregate top and edge surfaces
Abstract
Abstract A MOVABLE FRAME EQUIPPED FOR TRAVEL LENGTHWISE OF A CONCRETE PLANK BEING FORMED, AND HAVING HOOPERS FOR DISCHARGE OF CONCRETE IN LAYERS, ONE OVER THE OTHER, WITH THE TOP LAYER BEING FORMED OF EXPOSED AGGREGATE TO PROVIDE AN ORNAMENTAL SURFACE EFFECT, THERE BEING BAFFLING MEANS FOR KEEPING A NARROW, LONGITUDINALLY-EXTENDING ZONE ADJACENT ONE LONGITUDINAL EDGE OF THE PLANK FREE OF THE LOWER LAYERS OF CONCRETE, AND THERE BEING MEANS FOR THEREAFTER DIVERTING SOME OF THE AGGREGATE MATERIAL INTO SAID LONGITUDINAL ZONE TO FILL THE LATTER SO AS TO ALSO PROVIDE AN ORNAMENTAL SURFACE EFFECT UPON A LONGITUDINAL EDGE OF THE PLANK, AND THERE BEING A VIBRATOR FOR ACTING ON THE MATERIAL IN SAID NARROW ZONE.
Inventors
- 👤 Robert H Nagy
Bibliographic Details
Claims Analysis
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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) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |