Pin insert

Details Pin insert Pin insert

2011-07-12

2011-07-12

Schneider, Craig M (Department: 3753)

Fluid handling

Removable valve head and seat unit

Pump type

C137S855000, C403S276000, C403S283000

Reexamination Certificate

active

07975717

ABSTRACT:
A valve pin insert has a body for insertion into a valve plate and a stud integrally formed with the body and extending from one end of the body above the valve plate. The body has a lower shank at an end of the body that is opposite from the end at which the stud is positioned, and an upper shank at the end of the body adjacent to the end of the body at which the stud is positioned. The lower shank is of a lesser diameter than the upper shank and an undercut shoulder between the shanks forms a recess opening in the direction toward the lower shank and forms a tooth which shears material of the valve plate as the pin is inserted into a hole in the valve plate.

REFERENCES:
patent: 2221141 (1940-11-01), Kindt
patent: 3621868 (1971-11-01), Wise
patent: 4146206 (1979-03-01), Malloy et al.
patent: 4182217 (1980-01-01), Runge
patent: 6267527 (2001-07-01), Miller
patent: 6435758 (2002-08-01), Hinkel
patent: 2003/0181560 (2003-09-01), Kawaguchi et al.
Applicant's Exhibit A—Typical pin “c” installation in soft material “b” based on interference fit between pin “c” and hole “d” (friction force Fr-Fig. 1), admitted prior art.

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