Machine element or mechanism – Elements – Pawls and ratchets
Patent
1976-06-02
1977-06-07
Herrmann, Allan D.
Machine element or mechanism
Elements
Pawls and ratchets
188 8277, F16D 4112
Patent
active
040275507
ABSTRACT:
Ratchet claw adapted to cooperate with ratchet teeth formed on an annular portion of a rotatable member supported by a shaft on a stationary member for rotation relative thereto so as to prevent the rotation of the rotatable member in one direction. The ratchet claw is pivotally supported at its proximal end while the free ratchet claw portion is adapted to engage with one of the ratchet teeth. The ratchet claw is provided with a resilient ratchet biasing arm extending from a portion adjacent to the proximal end toward the free ratchet claw portion with a distance held therebetween. The biasing arm is so arranged that the annular portion of the rotatable member is resiliently clamped between the ratchet claw portion and the biasing arm so that the radial force urging the ratchet claw portion against the ratchet teeth and the radial force urging the biasing force against the annular portion are cancelled each other thereby preventing any radial force from being applied to the shaft to prevent frictional wear between the rotatable member and the shaft or between the shaft and the bearing of the shaft.
REFERENCES:
patent: 284491 (1883-09-01), Sackett
patent: 1386400 (1921-08-01), Gettle et al.
Copal Company Limited
Herrmann Allan D.
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