Valve guide and spring retainer assemblies

Details Valve guide and spring retainer assemblies Valve guide and spring retainer assemblies

2005-06-28

2005-06-28

Tyler, Cheryl (Department: 3746)

Pumps

Expansible chamber type

Having pumping chamber pressure responsive distributor

C417S454000, C417S571000, C417S568000, C137S512000, C137S543230, C092S169100

Reexamination Certificate

active

06910871

ABSTRACT:
Valve guide and spring retainer assemblies are described for use in plunger pump housings that incorporate structural features for stress-relief. These pump housing structural features accommodate correspondingly-shaped valve guides and/or spring retainers that are internally fixed in place using one or more non-threaded spacers. Plunger pumps so constructed are relatively resistant to fatigue failure because of stress reductions, and they may incorporate a variety of valve styles, including top and lower stem-guided valves and crow-foot-guided valves, in easily-maintained configurations. Besides securing valve guides and/or spring retainers, non-threaded spacers may be shaped and dimensioned to aid in further reducing stress and to improve volumetric efficiency of the pumps in which they are used.

REFERENCES:
patent: 5145340 (1992-09-01), Allard
patent: 5622486 (1997-04-01), McDuffie et al.

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