US 2007/0183911 A1 · Filter, piston pump using the filter, and method of mounting the filter in a valve seat member of the piston pump

Abstract

A filter to be mounted in a valve seat member for filtering liquid is proposed which can be manufactured without a drawing step, thereby improving productivity and cost performance of a piston pump in which such a filter is mounted. The filter is a flat metal plate including a main body formed with a plurality of filter holes in a central portion thereof, and a plurality of projections integrally and radially outwardly extending from a perimeter of the main body so as to be circumferentially spaced apart from each other. The filter is pushed into a filter mounting hole formed in a valve seat member of a discharge valve in a piston pump with the projections bent toward the opening of the filter mounting hole while being pressed against the inner surface of the filter mounting hole under an elastic restoring force and fixed to the valve seat member.

Claims20

Dependent claims

A filter for filtering a liquid in the form of a flat metal plate comprising a main body formed with a plurality of filter holes in a central portion thereof, and a plurality of projections integrally and radially outwardly extending from a perimeter of said main body so as to be circumferentially spaced apart from each other.

A method of mounting a filter for filtering a liquid in a filter mounting hole formed in a tubular valve seat member of a discharge valve in a piston pump, using a press punch, said filter mounting hole having an opening and a bottom at opposed ends thereof, respectively, said filter being in the form of a flat metal plate comprising a main body formed with a plurality of filter holes in a central portion thereof, and a plurality of projections integrally and radially outwardly extending from a perimeter of said main body so as to be circumferentially spaced apart from each other, said method comprising:

pushing said filter into said filter mounting hole, using said filter mounting hole and said press punch as forming dies to bend said projections toward the opening of said filter mounting hole by pressing tips of said projections against an inner surface of said filter mounting hole, while pushing said main body with said press punch;
and
bringing the thus bent projections into contact with the inner surface of said filter mounting hole near the bottom thereof, thereby fixing said filter to said valve seat member.

Dependencies are inferred from the claim text.

Facts

Application

11/653,391Filed 16 Jan 2007

Priority

JP 2006-0296927 Feb 2006

Published

9 Aug 2007

Term ends

Not estimatedThe source records don’t support an estimate.

Classification7 codes

F04B 53/20
Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00:…
B60T 8/4031
Comprising an additional fluid circuit including fluid pressurising means for modifying the pressure of the braking fluid, e.g. including wheel…:…
F04B 1/0421
Details or component parts: cylinders
F04B 1/0452
Details or component parts: distribution members, e.g. valves

Filter, piston pump using the filter, and method of mounting the filter in a valve seat member of the piston pump

Life of this patent

Filter, piston pump using the filter, and method of mounting the filter in a valve seat member of the piston pump

Life of this patent

Abstract

Claims20