Ratchet drive for construction toy set

Details Ratchet drive for construction toy set Ratchet drive for construction toy set

1997-02-06

1998-08-11

Hafer, Robert A.

Amusement devices: toys

Construction toy

Having parts assembled for relative movement

446 93, 446468, A63H 3312

Patent

active

057919640

ABSTRACT:
A ratchet mechanism includes an outer gear having a recess formed therein and an aperture for supporting the gear upon a shaft. The outer wall of the recess defines a plurality of angled facets forming a saw-tooth configuration. A ratchet pawl includes a pair of opposed resilient spring tabs which engage the angled facet saw-tooth combination in one direction of rotation while disengaging in the opposite direction. A second gear is secured to the ratchet pawl and defines an aperture for rotational support upon a shaft. A frame supports the ratchet mechanism in engagement with a pivotally supported drive arm. The drive arm includes a gear segment having a plurality of gear teeth engaging one of the gears of the ratchet mechanism. The drive arm further includes a coupling flange at the opposite end from the gear segment which is securable to a source of reciprocating power. A bevel gear engages the remaining gear of the ratchet mechanism and is rotatably supported upon the frame by a driven shaft. The supporting frame for the ratchet mechanism and driven gear is formed entirely of construction toy set elements and couplers which are secured together in a snap-fit attachment. The supporting frame elements are further coupleable to additional structures fabricated of construction toy set elements and couplers.

REFERENCES:
patent: 2742735 (1956-04-01), Sommerhoff
patent: 3232005 (1966-02-01), Lahr
patent: 3286397 (1966-11-01), Lohr
patent: 3902739 (1975-09-01), Kimura
patent: 4327517 (1982-05-01), Schwager
patent: 4761014 (1988-08-01), Huang
patent: 5090934 (1992-02-01), Quercetti

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