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US 5,626,443 AGranted
Convex-concave hobs
OwnerJohnnie W. Clarkinventor
Life of this patent
Estimating the term…
Abstract
A pair of complimentary gear cutting hobs including a convex hob having a plurality of hob teeth, with each hob tooth defining on opposite sides thereof cutting edges having a convex shape. The convex shape is defined by an arc with a center of radius which lies in the plane of the bottoms of the teeth. The complimentary hob is a concave hob having a plurality of hob teeth, with each hob tooth defining, on opposite sides thereof, cutting edges having a concave shape which is defined by an arc with a center of radius which lies in the plane of the tops of the teeth.
Claims1
Gear cutting hobs comprising:
- a pair of complimentary hobs including a convex hob and a concave hob,
- said convex hob having a plurality of hob teeth,
- each convex hob tooth defining, on opposite sides thereof, cutting edges having a convex shape,
- said convex hob teeth having a bottom and all of said bottoms of said convex hob teeth lying in a plane,
- said convex shape is defined by an arc with a center of radius which lies in said plane of the bottom of said convex hob teeth,
- said concave hob having a plurality of teeth which are complimentary with said convex hob teeth,
- each concave hob tooth defining, on opposite sides thereof, cutting edges having a concave shape,
- said concave hob teeth having a top and all of said tops of said concave hob teeth lying in a plane,
- said concave shape is defined by an arc with a center of radius which lies in the plane of the tops of said concave hob teeth.
6 more elements
Dependencies are inferred from the claim text.