Follower assembly for hand grease guns
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jan 27, 1981
Grant Date -
N/A
app pub date -
Sep 6, 1979
filing date -
Sep 6, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A follower assembly for a lubrication gun that effectively seals in either the gun cylinder after bulk-loading of the lubricant, or a smaller diameter lubrication cartridge positioned alternatively in the gun cylinder. The primary element of the follower assembly is a one-piece elastomeric follower body slidably received on a follower rod in the gun cylinder. This elastomeric follower body has a heavy central portion with a thin forwardly extending outer wall that seals against different diameter bores. The forward end of this thin outer wall has a heavy inwardly directed flange portion that stabilizes the thin wall. A plurality of forwardly projecting posts on the heavy central portion of the follower body engage this flange to pull the thin wall when the follower assembly moves forwardly. The follower rod, during manual priming, moves the follower body forwardly by engagement between a projection on the rod and a back-up plate behind the follower body, and rearwardly by engagement of a washer carried by the rod with the front of the follower body.
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