Rack gear and method of making the same

Details Rack gear and method of making the same Rack gear and method of making the same

1977-06-23

1979-01-09

Gerin, Leonard H.

Machine element or mechanism

Control lever and linkage systems

Hand operated

291592, 74422, B62D 120, F16H 104, B21D 5328, B21H 500

Patent

active

041332210

ABSTRACT:
An improved vehicle steering apparatus includes a lightweight hollow rack gear. The rack gear has a plurality of hollow teeth which engage a pinion gear in the steering assembly. In order to provide a variable ratio steering apparatus, the pitch of the teeth of the rack gear varies along the length of the gear. The rack gear is made by utilizing a pair of dies to form hollow gear teeth in a side wall of the tubular member. In forming the rack gear, one die is inserted into the tubular member while the other die is placed outside the tubular member with its teeth aligned with recesses between the teeth of the die inside the tubular member. The two dies are then pressed together. To form rack gear teeth with different pitches, the dies are provided with teeth of different pitches.

REFERENCES:
patent: 2041376 (1936-05-01), Schmidt
patent: 3163925 (1965-01-01), Ulm
patent: 3593593 (1971-07-01), Bradshaw
patent: 3753378 (1973-08-01), Bishop

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