Hydromechanical transmission

Details Hydromechanical transmission Hydromechanical transmission

1977-04-15

1979-10-09

Myhre, Charles J.

Machine element or mechanism

Rotary member or shaft indexing, e.g., tool or work turret

Preselected indexed position

74867, 74865, 74864, 74863, B60K 2100, B60K 4104

Patent

active

041701534

ABSTRACT:
In a hydromechanical transmission, low and high speed drive power trains are selectively completed in response to variation of the speed ratio between an input shaft and an output shaft. The transmission comprises a speed ratio detecting valve for detecting lower and higher limits of a predetermined speed ratio and a clutch control valve for conducting the switchover between the low and high speed drive power trains with a predetermined time lag after the actual speed ratio reaches a range defined by the lower and higher limits of the predetermined speed ratio.

REFERENCES:
patent: 3022676 (1962-02-01), Duffy
patent: 3546973 (1970-12-01), Ohie
patent: 3683721 (1972-08-01), Uozumi
patent: 3707890 (1973-01-01), Ito
patent: 3709067 (1973-01-01), Ito
patent: 3728915 (1973-04-01), Clark
patent: 3733931 (1973-05-01), Nyman
patent: 3738198 (1973-06-01), Kell
patent: 3842694 (1974-10-01), Marlow
patent: 3902380 (1975-09-01), Murakami
patent: 3949627 (1976-04-01), Murakami
patent: 4030381 (1977-06-01), Lalin
patent: 4041810 (1977-08-01), Harmon
patent: 4043227 (1977-08-01), Beals
patent: 4082013 (1978-04-01), Dornfeld

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