Patent ID: 8162184
Filing Date: 2012-04-24
Classification: F16N

Abstract:
1. A lubricating gun comprising a barrel for holding either lubricant in bulk or a tubular cartridge containing lubricant, a follower packing unit in the barrel, a follower rod for moving the follower packing unit in the barrel along a longitudinal axis of the barrel, said follower packing unit comprising the annular side wall of the elastomeric seal being resiliently deformable under said pressure in a radial direction for sealing against an interior surface of the barrel or the tubular cartridge, wherein said rear wall is deformable under said pressure to increase a radial sealing force of the rear wall against the follower rod at said second opening, wherein the back structural support comprises a elongate member, and wherein the opening in the back structural support comprises a bore in the elongate member having a cylindrical portion that receives said follower rod and is sized such that the elongate member seals against the follower rod.