Building units with interlockable toothed edges
Abstract
Abstract MODEL BUILDING UNITES WHICH MAY BE RADILY JOINED TOGETHER IN GREAT NUMBERS TO FORM CONTINUOUS AREAS IN PLAN OR SPACE. THE UNITS ARE JOINED EDGE TO EDGE BY MEANS OF AN INTERLOCK-DEVICE PROVIDED ALONG THE INTERENGAGING EDGES. THE INTERLOCK-DEVICES COMPRISES TWO ROWS OF UNIFORMLY PITCHED TEETH EXTENDING ON EITHER SIDE OF A COMMON DIVIDING PLANE, THE TEETH OF ONE ROW BEING OFFSET HALF A PITCH IN RELATION TO THE TEETH OF THE SECOND ROW. WHEN THE BUILDING UNITS ARE PUSHED TOGETHER TO BE JOINED, THE INNER SIDE OR INSIDE OF EACH TOOTH, I.E. THE SIDE LYING IN THE COMMON DIVIDING PLANE, ENGAGES BY FRICTION AND/OR SNAP ACTION A CORRESPONDING INSIDE OF A TOOTH IN AN OPPOSITE INTERLOCK-DEVICE, FORMING A FIRM, READILY DETACHABLE JOINT WHEREIN THE HOLDING FORES ARE ACTING SMOOTHLY AND UNIFORMLY DISTRIBUTED.
Inventors
- 👤 Lennart W Freese
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) | 1974-11-29 | 1975-05-31 | 1975-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-29 | 1979-05-31 | 1979-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-29 | 1983-05-31 | 1983-11-30 | $7700.00 | Window Closed / Lapsed |