Assistor for reducing stepping force

Details Assistor for reducing stepping force Assistor for reducing stepping force

1985-03-27

1985-11-19

Garrett, Robert E.

Motors: expansible chamber type

Fluid supply through diverse paths to single expansible chamber

91395, 91398, 60551, 60556, 137907, 251 77, 251 614, F15B 1510

Patent

active

045534705

ABSTRACT:
An assistor for reducing stepping force of a clutch pedal, in which a push rod is inserted into an assistor casing freely movably in the axial direction, a casing outside end of the rod is interconnected to a clutch pedal, a casing inside portion of the rod is provided with a piston which divides the casing into first and second chambers, the first chamber intercommunicates with atmosphere, the second chamber intercommunicates freely changeably with atmosphere and a negative pressure source through a change-over valve mechanism, and the piston is interlocked with the change-over valve mechanism through the means of a negative-pressure setting spring so that negative pressure for reducing stepping force can be fed into the second chamber according to a shifted length of the rod.

REFERENCES:
patent: 2873724 (1959-02-01), Olnhausen
patent: 2974494 (1961-03-01), Rike
patent: 3075499 (1963-01-01), Prather
patent: 3082744 (1963-03-01), Gardner
patent: 3138071 (1964-06-01), Sadler
patent: 3183671 (1965-05-01), Chouings
patent: 3321173 (1967-05-01), Seger
patent: 3408815 (1968-11-01), Stelzer
patent: 3691906 (1972-09-01), Kreuter
patent: 3845932 (1974-11-01), Fontaine
patent: 3908514 (1975-09-01), Rist

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