Remanufactured machine component and remanufacturing process
AssigneeCaterpillar Inc.
InventorFrancis E. Erbes
Life of this patent
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Abstract
A process for remanufacturing valve bodies, such as fuel injector valve bodies, includes regrinding a valve seat of a salvaged valve body with a grinding apparatus, and linking a center axis of the valve seat with a center axis of a guide bore for a valve which contacts the valve seat. Linking the center axis of the valve seat with the center axis of the bore includes contacting a locating element of the grinding apparatus with a locating surface on an outer diameter of the valve body during regrinding the valve seat. Locating on the outer diameter enables run-out between the axes to be inhibited during regrinding the valve seat based on concentric congruity between the locating surface and the bore.
Claims20
A process for remanufacturing valve bodies comprising:
- receiving a salvaged valve body having a valve seat therein and defining a bore;
- grinding the valve body, including regrinding the valve seat with a grinding apparatus;
- and
- linking a center axis of the valve seat with a center axis of the bore;
- wherein linking the center axis of the valve seat with the center axis of the bore includes establishing congruity between a first locating surface on an inner diameter of the valve body which defines the bore and a second locating surface on an outer diameter of the valve body prior to regrinding the valve seat, and contacting a locating element of the grinding apparatus with the second locating surface during regrinding the valve seat.
A remanufactured machine component comprising:
- a remanufactured valve body having a first end, a second end and a valve seat, the valve body further defining a first bore terminating at a first side of the valve seat and a second bore terminating at a second side of the valve seat;
- the valve seat having a center axis and the first bore comprising a locating surface which includes a center axis having a link with the center axis of the valve seat;
- wherein the remanufactured valve body further comprises an outer diameter including a second locating surface having a concentric congruity with the first locating surface, and wherein the link between the center axis of the valve seat and the center axis of the first bore is based on the concentric congruity.
A valve body remanufactured according to a process comprising:
- receiving a salvaged valve body having a valve seat therein and defining a bore;
- grinding the valve body, including regrinding the valve seat with a grinding apparatus;
- and
- linking a center axis of the valve seat with a center axis of the bore;
- wherein linking the center axis of the valve seat with the center axis of the bore includes establishing congruity between a first locating surface on an inner diameter of the valve body which defines the bore and a second locating surface on an outer diameter of the valve body prior to regrinding the valve seat, and contacting a locating element of the grinding apparatus with the second locating surface during regrinding the valve seat.
Dependencies are inferred from the claim text.