Patent ID: 7527176

Claim:
A grease gun for portable use comprising a grease gun body comprising a first mounting adapted for receiving a self contained grease reservoir, the grease gun body further comprising a resupply port communicative with the first mounting, a pumped grease supply coupled to a one of the first mounting and the resupply port, a plug structure obstructing an other of the first mounting and the resupply port, an output check valve coupled to an output port of the grease gun body, the output check valve restraining passage of grease from the output port when the grease is at pressure below about 30 psi, the self contained grease reservoir is an elongate cylindrical grease barrel selectively mounted to the first mounting, the grease gun body and grease barrel when mounted thereto being hand held, the first mounting includes a first intake port, the first intake port communicative with the self contained grease reservoir when the grease reservoir is directly mounted to the first mounting, the plug structure comprises a first plug member selectively mountable to the first mounting, the first plug member obstructing the first intake port when mounted to the first mounting, the plug structure further comprises a second plug member, the second plug member selectively receivable in the resupply port of the grease gun body, the second plug member obstructing the resupply port when received in the resupply port, whereby grease from the pumped grease supply may be introduced into the grease gun through the one of the first mounting and the resupply port.