Coplanar reverted gear train loop
AssigneeKer-Train Holdings Ltd.
InventorJohn Hugh Kerr
Life of this patent
Estimating the term…
Abstract
A gear assembly includes a first gear including first set of teeth and a first addendum circle, and a second gear having a second set of teeth meshing with the first set of teeth, The shape of the addendum flank of each first tooth and the shape of the addendum flank of each corresponding second tooth are defined by a curve of congruency which passes between the addendum circles and extends between the point of intersection of the addendum circles and the pitch point of the gears.
Claims13
A gear assembly comprising:
- a first gear including a first set of teeth and a first addendum circle;
- and
- a second gear coplanar with the first gear and including a second set of teeth meshing with the first teeth set,
- wherein the shape of an addendum flank of each first tooth and the shape of an addendum flank of each corresponding second tooth are defined by a curve of congruency passing between the addendum circles and extending between a point of intersection of the addendum circles and a pitch point of the gears.
A pinion including a set of gear teeth configured for meshing with gear teeth of a gear, the pinion and gear each having a respective addendum circle, wherein the shape of an addendum flank of at least one of the gear teeth of the pinion is defined by a curve of congruency passing between the addendum circles and extending between a point of intersection of the addendum circles and a pitch point of the pinion and the gear.
A method of forming teeth flanks for a pinion congruent with teeth flanks of a gear, the pinion and the gear each having a respective addendum circle and a respective pitch circle, the method comprising the steps of:
- defining a curve congruent with the addendum circles at least between a point of intersection of the addendum circles and a point of intersection of the pitch circles;
- for each of a plurality of points on the curve, determining polar co-ordinates for each respective point relative to a center of rotation of the pinion;
- and
- defining a shape of an addendum of each said tooth flank in accordance with the determined polar co-ordinates.
Dependencies are inferred from the claim text.