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US 6,537,453 B2Granted
Acid-neutralizing filter
AssigneeBaldwin Filters, Inc.
InventorsJohn H. Beard, Allan Roush
Life of this patent
Estimating the term…
Abstract
The present invention provides a filter apparatus for use in removing impurities and acids contained in a fluid that includes a particulate filter and an acid-neutralizing filter. The particulate filter and the acid-neutralizing filter may be positioned within separate housings or they may be positioned within a common housing. The acid-neutralizing filter contains an acid-neutralizing compound such as crushed limestone, calcium carbonate or magnesium carbonate.
Claims30
An oil circulation system which enables extended intervals between oil changes comprising:
- a canister;
- an inner shell inside the canister, the inner shell comprising a substantially impervious body having an inlet port and an outlet port;
- an acid-neutralizing compound contained within the inner shell;
- an oil passageway through the acid-neutralizing compound in the shell from the inlet port to the outlet port, the substantially impervious shell imparting substantial radial and axial components to the oil passageway;
- a particulate filter downstream of the acid neutralizing compound;
- and
- wherein a portion or all of the oil in the oil circulation system passes first through the acid-neutralizing compound and then through the particulate filter.
4 more elements
An acid-neutralizing apparatus comprising:
- a shell having a closed end and an open end;
- an acid-neutralizing compound contained within the shell;
- a baffle contained within the shell;
- a combination flow baffle and end cap for engaging the open end of the shell,
- wherein the flow baffle of the combination flow baffle and end cap lengthens the flow path of fluid passing through the apparatus, and
- wherein the combination flow baffle and end cap includes inlet and outlet ports which are covered by a screen material to prevent acid-neutralizing compound from exiting the inner shell.
3 more elements
An acid-neutralizing canister for an oil circulation system, comprising:
- a base plate;
- a canister;
- an inner shell, the inner shell comprising a substantially impervious body having an inlet port and an outlet port;
- an acid-neutralizing compound in the inner shell for neutralizing acids in the oil circulated through the inner shell;
- and
- an oil passageway through the acid-neutralizing compound in the shell from the inlet port to the outlet port, the substantially impervious shell imparting substantial radial and axial components to the oil passageway.
3 more elements
A replaceable acid-neutralizing canister for an oil circulation system, comprising:
- a housing;
- an inner shell, the inner shell comprising a substantially impervious body having an inlet port and an outlet port;
- an acid-neutralizing compound contained within an inner shell positioned in the housing adapted to neutralize acids in the oil flowing through the compound;
- an oil passageway through the acid-neutralizing compound in the shell from the inlet port to the outlet port, the substantially impervious shell imparting substantial radial and axial components to the oil passageway;
- and
- a particulate filter through which the acid-neutralized oil passes prior to returning to the oil circulation system, the particulate filter being contained within the inner shell.
3 more elements
An acid-neutralizing canister for an oil circulation system, comprising:
- a housing including a canister and a base plate, the canister having an open end, a closed end, and a generally cylindrical sidewall therebetween, the base plate having a central threaded opening for mounting the acid-neutralizing canister to the oil circulation system about an axis, the base plate connected to the outer canister at the open end and defining inlet and outlet ports for communicating oil with the oil circulation system, one of the inlet or outlet ports being provided by the threaded opening;
- an internal acid-neutralizing compound inner shell in the canister;
- an acid-neutralizing compound substantially filling the inner shell, the inner shell adapted to receive oil and return oil;
- the inner shell further containing a baffle defining an oil passageway such that the oil entering the inner shell flows through the acid-neutralizing compound in a first axial direction, and then flows in a second axial direction.
1 more element
An acid-neutralizing canister for an oil circulation system, comprising:
- an outer canister having an open end, a closed end, and a generally cylindrical sidewall therebetween;
- base plate connected to the outer canister at the open end, the base plate defining a threaded central opening providing a central port and a plurality of peripheral ports;
- inner shell including a base and a tubular sidewall extending from the base, the inner shell having a base proximate the base plate, the base including apertures in communication with the central port, the tubular sidewall being substantially impervious without perforations throughout the sidewall;
- particulate acid-neutralizing compound substantially filling inner shell;
- baffle plate slidable in the inner shell container;
- spring positioned between the inner closed end of the outer canister and the outer closed end of the inner shell;
- and
- oil passageway through the inner shell such that the oil flowing through the inner shell contacts the acid-neutralizing compound.
5 more elements
Dependencies are inferred from the claim text.