Patent ID: 7757630

Claim:
A voltage block device, configured for use in an electrostatic coating system in which a negative electric potential is applied to a coating material supplied from a coating material source to a spray device configured to spray the coating material to a coating object to which a positive electric potential is applied, the voltage block device configured to prevent the negative electric potential from transferred to the coating material source, comprising: a switching device including a linear slider which is selectively slidable between first and second positions, an inlet port in fluidic communication with the coating material source, and an outlet port in fluidic communication with the spray device; a reservoir including first and second chambers; the inlet and outlet ports in fluidic communication with the first and second chambers, respectively, when the slider is at the first position; and the inlet and outlet ports in fluidic communication with the second and first chambers, respectively˜when the slider is at the second position.