Grease gun including a purge assembly

A lubricant dispenser comprising:

• a housing;
• a reservoir for containing lubricant;
• a pump assembly 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,
• 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, and
• a button coupled to the plunger, wherein the button defines an aperture, in the sealed position, the aperture not being aligned with the channel, and, in the open position, at least a portion of the aperture being aligned with the channel.

A lubricant dispenser comprising:

• a housing;
• a reservoir for containing lubricant;
• a pump assembly operable to pump lubricant;
• and
• a purge assembly including
• a channel defined by the housing and extending between the reservoir and atmosphere, a portion of the channel extending along a channel axis through an opening in the housing and to atmosphere, the channel including a recess formed in the housing in communication with the portion of the channel,
• a plunger movable 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, the plunger positioned within the recess, the recess being sized to create a seal between the housing and the plunger during movement of the plunger relative to the housing, and
• a biasing member operable to bias the plunger toward the sealed position.

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,
• 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, and
• an actuator coupled to the plunger, wherein at least a portion of the actuator is positioned outside of the housing, and wherein the actuator includes a first leg coupled to the plunger and a second leg extending at a right angle from the first leg.