Machine element or mechanism – Gearing – Interchangeably locked
Patent
1990-05-10
1991-04-16
Wright, Dirk
Machine element or mechanism
Gearing
Interchangeably locked
3644241, B60K 2010
Patent
active
050072994
ABSTRACT:
A power shift transmission having a ratio matching feature whereby the disengagement of the transmission by moving the gearshift lever to the neutral position or by depressing the clutch pedal initiates a routine in the microprocessor controlling the operation of the transmission to calculate the ratio of the rotation of the input and output shafts of the transmission and select the gear most closely matching the calculated ratio is disclosed wherein the ratio matching routine can be manually overridden by signalling a gear change with the gearshift lever. The override feature for the ratio matching routine can be permanent for each disengagement of the transmission or temporary for the running of a timer for a predetermined length of time.
REFERENCES:
patent: 4425620 (1984-01-01), Batcheller et al.
patent: 4551802 (1985-11-01), Smyth
patent: 4610179 (1986-09-01), Parker
patent: 4646895 (1987-03-01), Horsch
patent: 4648290 (1987-03-01), Dunkley et al.
patent: 4855913 (1989-08-01), Brekkestran et al.
1988 John Deere & Company Sales Brochure for 4-Wheel-Drive Tractors (No Date).
Operators Manual for Versatile Model 936 and 976 Tractors (Pertinent Pages are Attached.) (No Date).
Ford New Holland Inc.
Wright Dirk
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