192 clutches and power-stop control – Transmission control and clutch control – Interrelated
Patent
1982-08-19
1985-10-29
Bonck, Rodney H.
192 clutches and power-stop control
Transmission control and clutch control
Interrelated
74477, 74483R, G05G 510, B60K 4122
Patent
active
045496374
ABSTRACT:
A vehicle, such as a tractor, has a main change-speed gear with an associated clutch and a load shift gear coupled to a selector rod. The load shift gear can be shifted under load between a normal position and an under-speed position which produces increased tractive effort by reducing the speed by about 20%. This load shift gear can be operated by the same lever as operates the main change speed gear. In order to prevent simultaneous operation of the main gear and the load change gear, with corresponding interference with the synchronization of the main gear, an interlock device is provided. The interlock device includes a bellows which is connected into the hydraulic circuit for the clutch and, when the clutch pedal is depressed, the bellows holds a plunger in interlocking engagement with one of two grooves in the selector rod which is mechanically coupled to the load change gear. In other embodiments, a mechanical linkage between the clutch pedal and the interlock device is provided.
REFERENCES:
patent: 3056381 (1962-10-01), Barnett
patent: 3741035 (1973-06-01), May
patent: 3783985 (1974-01-01), May
patent: 4023418 (1977-05-01), Zenker
patent: 4146120 (1979-03-01), Stevens
patent: 4406356 (1983-09-01), Prince
patent: 4438657 (1984-03-01), Nobis
patent: 4441379 (1984-04-01), Malkowski et al.
Huckler Volker
Nobis Dieter
Schafer Helmut
Sonns Eugen
Bonck Rodney H.
Deere & Company
Towner Alan G.
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