Toothed gearing

Claim 2

A gearing in which the teeth of each of the meshing gearwheels in a section by a plane at right angles to the axis of roTation of the gearwheel have an involute tooth profile, with a straight line of action associated with these involute profiles, characterized in that the gearwheels are used for coupling shafts having non-parallel axes in a position in which the said planes at right angles to the axes of rotation intersect along a line in the direction of the line of action, and at least at the location of the involute profile line the teeth have a small width, while in theory there will occur between the co-operating tooth flanks a point contact which moves along the line of intersection of the planes.

Claim 3

A gearing as claimed in claim 1, for shafts having intersection axes, characterized in that the profile of each tooth in a section by a plane at right angles to the axis of rotation comprises a convexly involute curve and a concavely involute curve, a tooth flank having a convexly involute curve of one wheel co-operating with a tooth flank having a concavely involute curve of the other wheel.

Claim 4

A first gearwheel rotatable about a first axis and operable with a similar second gearwheel rotatable about a second axis non-parallel with the first axis, each wheel having teeth about its periphery which define a plane generally normal to its axis of rotation, each tooth having a profile which defines a convex involute leading edge and a concave involute trailing edge, said first gearwheel and said second wheel, when positioned for their teeth to be drivingly coupled, have said planes intersecting along a line in which is defined the line of action of the gears, and at least at the location of the involute profile line each tooth has width in the axial direction of the wheel that is thin relative to the tooth height in the radial direction of the wheel.

Claim 5

A first gearwheel rotatable about a first axis and operable with a similar second gearwheel rotatable about a second axis non-parallel with the first axis, each wheel having teeth about its periphery which define a plane generally normal to its axis of rotation, each tooth having a profile which defines a convex involute leading edge and a concave involute trailing edge, said first gearwheel and said second wheel, when positioned for their teeth to be drivingly coupled, have said planes intersecting along a line in which is defined the line of action of the gears, and at least at the location of the involute profile line each tooth has width in the axial direction of the wheel that is thin relative to the tooth height in the radial direction of the wheel.

Claim 6

A pair of first and second co-operating gears rotatable about non-parallel axes, each wheel having teeth about its periphery which define a plane generally normal to its axis of rotation, the first gear''s teeth each having a profile which defines an involute on at least one of the leading and trailing edges thereof, the second gear''s teeth each having a profile which defines an involute on at least the other of said leading and trailing edges, said gears when positioned such that their teeth are drivingly coupled, having said planes intersecting along a line in which is defined the line of action of the gears, and at least at the location of the involute profile line each tooth has width in the axial direction of the wheel that is thin relative to the tooth height in the radial direction of the wheel.

Claim 7

A pair of first and second co-operating gears rotatable about non-parallel axes, each wheel having teeth about its periphery which define a plane generally normal to its axis of rotation, the first gear''s teeth each having a profile which defines an involute on at least one of the leading and trailing edges thereof, the second gear''s teeth each having a profile which defines an involute on at least the other of said leading and trailing edges, said gears when positioned such that their teeth are drivingly coupled, having said planes intersecting along a line in which is defined the line of action of the gears, and at least at the location of the involute profile line each tooth has width in the axial direction of the wheel that is thin relative to the tooth height in the radial direction of the wheel.

Claim 8

Apparatus according to claim 4 wherein said teeth are evenly spaced on each wheel.