Amusement devices: toys – Construction toy – Resilient interlocking joint
Patent
1996-03-22
1997-07-08
Hafer, Robert A.
Amusement devices: toys
Construction toy
Resilient interlocking joint
446126, 403300, A63H 3306, A63H 3308
Patent
active
056454643
ABSTRACT:
A switch lock plays a key role to combine a plurality of four embodiments covering Cube, Trigonal Prism, Right Pyramid, and Quadrant Column plus accessary Segment Column blocks through a ring opening lying centrally on every side of these embodiments, except of Segment Column only one surface sharing it. By the sliding between rounded corners and that happening between sphere surfaces, assembly purpose is then achieved. What they really touch is only three small pieces of are and six points; therefore, assemblage and disassemblage among blocks turn much easier. After assemblage, six semi-circular knobs below the ring opening will stable hold the middle lower part of three ball-like projections on the enlarged head of the switch lock in pairs by the strength of expelling each other. In addition, taking the advantage of expelling each other between the rounded corner behind a neck line and that below the head of the switch lock, the blocks can match each other firmly and correspondingly without any rotation.
REFERENCES:
patent: 2843971 (1958-07-01), Gardellin
patent: 2885822 (1959-05-01), Onanian
patent: 3413752 (1968-12-01), Perry
patent: 3597874 (1971-08-01), Ogsbury
patent: 3611620 (1971-10-01), Perry
patent: 3681870 (1972-08-01), Alpert
patent: 3822499 (1974-07-01), DeVos
patent: 4947527 (1990-08-01), Hennig
patent: 5306198 (1994-04-01), Forman
patent: 5486127 (1996-01-01), Wolfe
Chen Tony D.
Hafer Robert A.
Muir D. Neal
Rozsa Thomas I.
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