Patent ID: 8465266

Claim:
A vacuum pressure system comprising: an inlet; a linear actuator having a permanent magnet, a coil, an inner ferromagnetic core and an outer ferromagnetic core, the outer ferromagnetic core surrounding at least a portion of each of the permanent magnet, the coil, and the inner ferromagnetic core; the linear actuator being operative to exhibit relative motion between the peimanent magnet and the coil responsive to an electrical current being applied to the coil such that the linear actuator forms vacuum pressure and draws fluid into the inlet; and a biasing member operative to bias the permanent magnet against a force caused by the electrical current being applied to the coil, which biasing member comprises a diaphragm that forms a seal with a housing, which housing includes a sidewall and an endwall, and which sidewall extends from the diaphragm to the endwall thereby sealingly defining an interior chamber within the housing in which the linear actuator is located; wherein the endwall includes an aperture that fluidly communicates with the inlet.