Method of making a pump having relief valve seat free of direct

Details Method of making a pump having relief valve seat free of direct Method of making a pump having relief valve seat free of direct

1999-03-25

2000-07-18

Cuda, Irene

Metal working

Method of mechanical manufacture

Prime mover or fluid pump making

29888025, 29890126, B23P 1500

Patent

active

060889160

ABSTRACT:
A pump includes a coaxially integrated pump bypass/relief valve element of high density polymer material seats against a hard metallic sleeve that is pressed into a first counterbore around the bypass flow channel with an interference fit. That axial end of the sleeve bearing the valve seat face projects, for a substantial proportion of the sleeve length, beyond the first counterbore shoulder into a second counterbore space to provide an annular space around the outside diameter surface of the sleeve to free the seat face end of the sleeve from direct structural restraint.

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