Patent ID: 7271359

Claim:
A fluid height sensor which includes a housing having a housing cavity, a float that has a float shaft that is pivotally mounted on said housing and that has a shaft inner end that lies in said housing cavity, and a switch assembly that lies in said housing cavity and that is closed when said float rises to a predetermined level, said switch assembly including a first contact and a switch blade with an inner end fixed to said housing and an outer end that is moveable forward against said first contact and rearward away from said first contact, said shaft inner end being coupled to said switch blade outer portion to move it forward and rearward, including: a third blade that has an inner end fixed to said housing at a location adjacent to said switch blade inner end and that has a third blade outer portion, and a spring that extends between said third blade outer portion and said switch blade outer portion and that biases said switch blade outer portion towards said switch blade inner end; said shaft inner end is coupled to said third blade outer portion to move said third blade outer portion forward and rearward, and through said spring to move said switch blade outer portion forward and rearward while inwardly biasing said switch blade outer portion.