Patent ID: 9243748
Filing Date: 2016-01-26
CPC Classification: F16N

Claim Text:
1. A grease gun with a quick-release end cover comprising: a barrel, and an operating end cover and a piston end cover disposed at two ends of the barrel, the grease gun being characterized in that: between the operating end cover and the barrel is disposed at least one quick-release device which comprises: an annular groove is formed around an outer surface of one end of the barrel; a first hole is formed in the operating end cover and includes an outer open end located toward an outer surface of the operating end cover, and an inner open end located toward an inner surface of the operating end cover, inside the first hole is formed an annular shoulder portion, in the outer open end of the first hole is formed a slot which is defined by two symmetrical meniscus structures; a control member includes a shaft inserted into the first hole of the operating end cover, the shaft has one end provided with an abutting block which is disposed in the first hole, and another end formed with an operating portion, the abutting block is formed with an annular abutting portion, the shaft is further provided with a positioning pin which is located close to the operating portion, a compression spring is sleeved onto the shaft and has one end pushed against the annular shoulder portion of the first hole and another end pushed against the annular abutting portion of the abutting block, respectively, when the positioning pin moves or rotates along with the shaft to engage in the slot, the abutting block will be pushed by the compression spring to move into the annular groove of the barrel, or, when the positioning pin disengages from the slot, the abutting block will be pushed by the compression spring to move out of the slot, so as to separate the barrel from the operating end cover.