US Patent: 4,534,684 - Apparatus For Milling A Gear For A Double Enveloping Worm Gear Drive


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US Patent: 4,534,684

Apparatus For Milling A Gear For A Double Enveloping Worm Gear Drive

Patentee:

Bernard H. Johnson (exact or similar names) - Plymouth, Wayne Count, MI

USPTO Classifications:

409/26, 409/29, 409/40, 409/41, 409/44, 409/51, 409/55, 451/161

Tool Categories:

Assignees:

None

Manufacturer:

Not known to have been produced

Witnesses:

Unknown

Patent Dates:
Applied:	Sep. 30, 1982
Granted:	Aug. 13, 1985

Patent Pictures:

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Description:

Abstract:

Apparatus for milling a gear for a double enveloping worm gear drive. A rotating milling cutter is advanced toward a workpiece spindle to mill a flank of a gear tooth by tilting the milling cutter supporting frame about an axis that passes through the axis of rotation of the workpiece spindle to form a predetermined change in the helix angle from the top to the root of the tooth. The initial tilt setting of the cutter is adjusted to suit the root helix angle.