Electronic foot pedal having improved biasing arrangement
First Claim
Patent Images
1. An electronic foot pedal for outputting an electrical signal for controlling speed of a vehicle engine, comprising:
- a base, a treadle pivotally 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, anda pair of clock type springs of flat spirally wound ribbon-like material, each spring individually mounted for biasing said treadle toward said first position, said springs each being characterized by uniform bending of the spring along its spiral length to minimize the degree of fatiguing flexure as the treadle is pivoted between the first and second positions.
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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.
36 Citations
4 Claims
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1. An electronic foot pedal for outputting an electrical signal for controlling speed of a vehicle engine, comprising:
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a base, a treadle pivotally 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, and a pair of clock type springs of flat spirally wound ribbon-like material, each spring individually mounted for biasing said treadle toward said first position, said springs each being characterized by uniform bending of the spring along its spiral length to minimize the degree of fatiguing flexure as the treadle is pivoted between the first and second positions. - View Dependent Claims (2, 3, 4)
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Specification