Gear pump with ring-type shaft retainer

Details Gear pump with ring-type shaft retainer Gear pump with ring-type shaft retainer

1988-12-27

1990-02-06

Smith, Leonard E.

Rotary expansible chamber devices

With rapid disassembly feature

418170, 403326, F01L 110, F16D 106

Patent

active

048985236

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.

REFERENCES:
patent: 3865499 (1975-02-01), Flichy
patent: 4171939 (1979-10-01), Harwath
patent: 4222246 (1980-09-01), Rongley
patent: 4391580 (1983-07-01), Hunsberger et al.
patent: 4685871 (1987-08-01), Harwath

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