Machine element or mechanism – Gearing – Interchangeably locked
Patent
1977-08-11
1980-05-20
Chandler, Lance
Machine element or mechanism
Gearing
Interchangeably locked
74745, 74665L, 180 14R, 180 77S, B60K 2016, F16H 3706
Patent
active
042033756
ABSTRACT:
In a vehicle having separate front and rear transmissions, a system for slaving one of the transmissions to the other so that the slave transmission will operate in the same drive range as that existing in the master transmission. Low-level binary coded signals are separately generated by each transmission to indicate the existing drive ranges of the two transmissions. The signals are sent to a control unit where they are examined and used to shift the slave transmission up or down as necessary, so that it keeps in step with the drive range in which the master transmission is operating. A unique binary code is used in the sending of drive-range signals to the control unit to prevent the control unit from shifting the slave transmission in response to errors in the signals which may occur in the event of faults in the cables through which the signals are sent.
REFERENCES:
patent: 3093008 (1963-06-01), Wight
patent: 3326314 (1967-06-01), Wolf
patent: 3512277 (1970-05-01), Stuller
patent: 3561367 (1971-02-01), Black et al.
patent: 3679018 (1972-07-01), Luft
patent: 3695373 (1972-10-01), Bostrom
patent: 4004648 (1977-01-01), Joseph et al.
Caterpillar Tractor Co.
Chandler Lance
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