Dual path, dual range transmission

Details Dual path, dual range transmission Dual path, dual range transmission

1977-04-18

1980-01-01

Wyche, Benjamin W.

Machine element or mechanism

Elements

Gear casings

74750R, F16H 4704, F16H 344

Patent

active

041810414

ABSTRACT:
A dual path, dual range transmission utilizes two simple planetaries with a sliding shaft shift wherein a first ring gear is in constant mesh with the first planet gear, the second ring gear is connected with the first carrier and the second ring gear is also in constant mesh with the second planet gear. A variable speed device, drivingly connected with the input shaft, controllably varies the rotative speed of a variable speed control shaft which is connected with the first and second sun gears. The input shaft is also independently drivingly connected with the first ring gear and the second planet carrier, with the output shaft being connected with the first carrier. Means are provided for alternately first moving the first sun gear into mesh with the first planet gear, when the pitch line velocity of the first planet gear, relative to the first planet carrier, is substantially the same as the pitch line velocity of the first sun gear, and out of mesh when they are rotating under load, and secondly for moving the second sun gear into mesh with the second planet gear, when the pitch line velocity of the second planet gear, relative to the second planet carrier, is substantially the same as the pitch line velocity of the second sun gear, and out of mesh when they are under load, with this means for moving being activated only when the control shaft is rotating at a selected speed relative to the speed of the two sun gears.

REFERENCES:
patent: 1829725 (1931-11-01), Alden
patent: 3433095 (1969-03-01), Tuck
patent: 3534632 (1970-10-01), Smith
patent: 3597997 (1971-08-01), Phillips
patent: 3777594 (1973-12-01), Frost

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