Shock control arrangement in hydraulic control system of automat

Details Shock control arrangement in hydraulic control system of automat Shock control arrangement in hydraulic control system of automat

1978-11-06

1981-06-23

Braun, Leslie

Machine element or mechanism

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

Preselected indexed position

74868, B60K 4110

Patent

active

042743079

ABSTRACT:
In an automatic power transmission having a transmission mechanism including fluid operated frictional units to be actuated to select automatic forward drive and reverse drive gear conditions and make a shift between the first, second and third gear ratios in the automatic forward drive range, a shock control arrangement is provided in the hydraulic control system for the transmission mechanism, comprising a pressure accumulator unit which takes up the fluid pressure to be applied to any of the frictional units during selection of the automatic forward drive range or reverse drive gear position or during upshifting between the aforesaid gear ratios in the automatic forward drive range, and a pressure reducing valve for eliminating or reducing the fluid pressure in one of the frictional units when a fluid pressure is being supplied to another frictional unit during upshifting between the second and third gear ratios in the automatic forward drive range.

REFERENCES:
patent: 2788678 (1957-04-01), Sheppard
patent: 3167970 (1965-02-01), Wagner et al.
patent: 3237476 (1966-03-01), Jondasek
patent: 3495481 (1970-02-01), Ohie et al.
patent: 3590663 (1971-07-01), Yamaguchi et al.
patent: 3656372 (1972-04-01), Chana
patent: 3667323 (1972-06-01), Irie
patent: 3683721 (1972-08-01), Uozumi et al.
patent: 3688608 (1972-09-01), Leach
patent: 3813964 (1974-06-01), Ichimura et al.
patent: 3951011 (1976-04-01), Lemon
patent: 3985063 (1976-10-01), Lemon

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