Patent ID: 8783522

Claim:
A lubricant dispenser comprising: a housing; a reservoir coupled to the housing for containing lubricant; an output hose coupled to the housing in communication with the reservoir; a pump assembly positioned within the housing and operable to pump lubricant; and a purge assembly including a channel defined by the housing and extending between the reservoir and atmosphere, at least a portion of the channel extending along a channel axis through an opening in the housing and to atmosphere, and a plunger slidable along a plunger axis between a sealed position, in which the reservoir is isolated from atmosphere, and an open position, in which the reservoir is in fluid communication with atmosphere, the plunger axis extending at an angle with respect to the channel axis; wherein the channel has a diameter, and wherein the plunger includes a plunger portion positioned within the channel, the plunger portion having a diameter less than the diameter of the channel.