Machine element or mechanism – Control lever and linkage systems – Variable output force
Patent
1974-08-28
1976-02-17
Sprague, Kenneth W.
Machine element or mechanism
Control lever and linkage systems
Variable output force
74518, G05G 104
Patent
active
039384071
ABSTRACT:
According to the present disclosure a variable ratio parking brake control has a foot operated lever with a cam slot. A guide member is pivotally connected to the lever and it also has a cam slot. A clevis that is connected to a parking brake cable has a bearing pin which is slidably supported within the cam slots of the lever and the guide member. A spring is supported by the guide member and exerts a spring force urging the clevis to the outer ends of the two cam slots. The clevis is slidable from the outer ends of the cam slots to the inner ends of the slots in response to both displacement of the lever from a brake released position to a brake applied position and a load on the clevis that exceeds an amount determined by the force of the spring. The displacement of the clevis from the outer end of the cam slot of the lever to the inner end of the slot increases the mechanical advantage ratio of the brake control system. The increase in ratio occurs in response to displacement of the lever and the tension in the brake cable.
REFERENCES:
patent: 1601649 (1926-09-01), Schaeffer
patent: 2184294 (1939-12-01), Fergueson
patent: 2834184 (1958-05-01), Ingres
patent: 3466942 (1969-09-01), Keller et al.
patent: 3739579 (1973-06-01), Lutz
Ford Motor Company
Sadler Clifford L.
Sprague Kenneth W.
Zerschling Keith L.
LandOfFree
Variable ratio parking brake control does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Variable ratio parking brake control, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Variable ratio parking brake control will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1740222