Patent ID: 8535014

Claim:
A system for an explosion-proof pump, comprising: a switch housing having a cavity formed therein and being mated to and sealed against one of an access plate and a motor housing; a switch secured in the cavity for activating and deactivating the pump; a float having a float rod extending therefrom; a switch arm having a pivot point, the float rod being connected to a portion of the switch arm spaced away from the pivot point; at least one bushing affixed to and sealed against the switch housing and passing through an orifice in the switch housing; an actuator rod rotatable about a longitudinal axis thereof and having a first end connected to the switch arm at the pivot point, the actuator rod passing through the at least one bushing into the cavity of the switch housing; and a roll pin distinct from the actuator rod and extending radially from the actuator rod near a second end of the actuator rod adjacent to the switch such that when the float rises or falls, the float rod moves to cause the switch arm to pivot about the pivot point and rotate the actuator rod about its longitudinal axis causing the roll pin to pivot about the longitudinal axis of the actuator rod and displace the switch to activate or deactivate the pump.