| 摘要 |
A plunger assembly is provided for slidable engagement with the plunger rod in hand grease guns, which grease guns are adapted to use both cartridge-packed grease and bulk-loaded grease. The plunger, in cross section, is of essentially W-shaped configuration and comprises a sleeve having a bore formed therethrough for slidably receiving the rod. A transverse web is carried by the forward portion of the sleeve and extends radially outwardly and, at its periphery, is attached to an interior support section which extends outwardly and rearwardly of the web to proximate the inside diameter of the grease barrel. An annular flexing and sealing wall is carried by the periphery of the support section and extends outwardly to beyond the inner diameter of the grease barrel and then forwardly and inwardly to a position forward of the sleeve and inward of the inner diameter of a grease cartridge. An annular lip is formed on the inner side of the wall and engages washer means between the lip and the forward portions of the transverse web.
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