Gear pump with ring-type shaft retainer
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United States of America Patent
Stats
-
Feb 6, 1990
Grant Date -
N/A
app pub date -
Dec 27, 1988
filing date -
Dec 27, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A gear pump in which a drive shaft is telescoped into a bore in a spur gear and is held against rotation relative to the gear by means of a key fitting into keyways formed in the shaft and in the bore of the gear. To retain the shaft against axial movement relative to the gear, a spring steel ring is formed with a radially extending slot having a transverse width just slightly greater than the transverse width of the key. The ring is collapsed hoopwise into a groove in the shaft and is positioned such that the slot in the ring is alined axially with the keyway in the shaft. When the shaft is telescoped to a predetermined depth in the bore in the gear, the ring expands hoopwise and snaps into a groove formed in the wall of the bore. The coaction of the ring with the two grooves locks the shaft against axial movement relative to the gear.
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