Electronic foot pedal having improved biasing arrangement
First Claim
Patent Images
1. An electronic foot pedal adapted for controlling speed of a vehicle engine, comprising:
- a base, a treadle moveable between a first position and a second position relative to the base, a member coupled to said treadle and responsive to pivotal movement of said treadle for outputting a varying signal proportional to the movement of said treadle between said first and second positions;
means associated with said treadle for yieldably biasing said treadle toward said first position;
an idle validation switch independent of said member and fixedly mounted to said treadle, a combination plunger and cam responsive to pivotal movement of the treadle to effect axial movement of the plunger, said switch activated by said axial movement of the plunger to override the varying signal of said member only with the treadle positioned at the first position, adjusting means associated with said combination plunger and cam to adjust relative positions of the plunger and cam for coordinating the point of activation of the switch with the position of the treadle only at the first position.
6 Assignments
0 Petitions
Accused Products
Abstract
An electronic foot pedal for outputting an electrical signal proportional to the degree a treadle is pivoted. The electronic foot pedal has an improved spring arrangement for yieldably biasing the treadle toward its home position. Dual springs are provided, independently mounted and supplementary to each other. Each spring has an adequate biasing force to urge the treadle to its home position. The springs are of a ribbon-like material that are wound into a flat spiral. The springs are subjected mainly to bending forces and have flexure as the treadle is pivoted to its pivotal limits.
50 Citations
3 Claims
-
1. An electronic foot pedal adapted for controlling speed of a vehicle engine, comprising:
-
a base, a treadle moveable between a first position and a second position relative to the base, a member coupled to said treadle and responsive to pivotal movement of said treadle for outputting a varying signal proportional to the movement of said treadle between said first and second positions; means associated with said treadle for yieldably biasing said treadle toward said first position; an idle validation switch independent of said member and fixedly mounted to said treadle, a combination plunger and cam responsive to pivotal movement of the treadle to effect axial movement of the plunger, said switch activated by said axial movement of the plunger to override the varying signal of said member only with the treadle positioned at the first position, adjusting means associated with said combination plunger and cam to adjust relative positions of the plunger and cam for coordinating the point of activation of the switch with the position of the treadle only at the first position. - View Dependent Claims (2, 3)
-
Specification