Oil free CPR apparatus air pump

Portable pump apparatus 10 for the provision of air to a cardiopulmonary resuscitation (CPR) apparatus comprises a housing 20 with an air inlet 30, an air outlet 40 and a substantially oil free pump 50 located within the housing with an inlet and an outlet communicating with the respective housing inlet and outlet. The pump may draw air through a 50 micron intake filter 4 and outputs past a spur line reservoir 70 via two output filters 60, 65 of 0.5 and 0.2 microns which act as moisture traps. A pressure warning light 100, a relief valve 80 and system 90 for pressure release on shutdown may be provided. The pump is intended to output medical grade air containing less than 1mg, preferably 0.5mg of particulate oil mist per cubic metre of air and less than or equal to 5.5 mg carbon monoxide, 900mg of carbon dioxide per cubic metre of air with no moisture and no bacterial contamination. The apparatus may be used with a LUCAS ¹ C PR apparatus and the pump may be a WOBL ¹ machine.