Spin-on oil filter replacement element
First Claim
1. A spin-on oil filter kit for use with an engine having an oil inlet port with external threading and an oil outlet port adjacent the oil inlet port, the oil filter kit comprising:
- an annular adapter having internal threads extending therethrough and sized to mate with external threading on an oil inlet port of an engine, the adapter having an outer periphery and defining an oil entrance between the outer periphery and the internal threads;
a lock nut for securely retaining the annular adapter on the oil inlet port of the engine, the lock nut having a central opening defining an oil exit hole therethrough, at least a portion of the lock nut having internal threads of the same size as the internal threads of the adapter, the lock nut having a seal shoulder extending opposite the internal threads;
a canister removably attachable to the outer periphery of the adapter, the canister having a peripheral wall and an end wall attached to the peripheral wall; and
a filter element sized to fit within the canister and against the seal shoulder of the lock nut, the filter element comprising;
an annular front end cap defining an axis, adapted to seal against the seal shoulder of the lock nut;
a rear end cap opposing the front end cap; and
filtration material disposed between the front end cap and the rear end cap and having an elongated annular shape about the axis and defining a clean oil chamber along the axis within the filter element;
the filtration material having an outer periphery smaller than the peripheral wall of the canister so as to define a dirty oil chamber between the filtration material and the peripheral wall of the canister.
1 Assignment
0 Petitions
Accused Products
Abstract
A modular oil filter is used in an engine with a spin-on type oil inlet port. An adapter is screwed onto the inlet port, and secured thereon by a lock nut. A backflow valve may optionally be secured between the lock nut and the adapter to cover the oil entrance(s) in the adapter. A replaceable oil filter element is coaxially located against a seal shoulder of the lock nut. A housing or canister surrounds the filtration element and releasably secures to the adapter. The filter element may have outwardly extending tabs, an inner or outer diameter releasably connected to a spring coil, or other means to releasably secure the filter element within the canister prior to being placed on the adapter/lock nut.
161 Citations
16 Claims
-
1. A spin-on oil filter kit for use with an engine having an oil inlet port with external threading and an oil outlet port adjacent the oil inlet port, the oil filter kit comprising:
-
an annular adapter having internal threads extending therethrough and sized to mate with external threading on an oil inlet port of an engine, the adapter having an outer periphery and defining an oil entrance between the outer periphery and the internal threads; a lock nut for securely retaining the annular adapter on the oil inlet port of the engine, the lock nut having a central opening defining an oil exit hole therethrough, at least a portion of the lock nut having internal threads of the same size as the internal threads of the adapter, the lock nut having a seal shoulder extending opposite the internal threads; a canister removably attachable to the outer periphery of the adapter, the canister having a peripheral wall and an end wall attached to the peripheral wall; and a filter element sized to fit within the canister and against the seal shoulder of the lock nut, the filter element comprising; an annular front end cap defining an axis, adapted to seal against the seal shoulder of the lock nut; a rear end cap opposing the front end cap; and filtration material disposed between the front end cap and the rear end cap and having an elongated annular shape about the axis and defining a clean oil chamber along the axis within the filter element; the filtration material having an outer periphery smaller than the peripheral wall of the canister so as to define a dirty oil chamber between the filtration material and the peripheral wall of the canister. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
-
-
15. A method of attaching an oil filter element to an engine having an oil inlet port with external threading and an oil outlet port adjacent the oil inlet port, the method comprising:
-
screwing an annular adapter having internal threads extending therethrough onto an inner portion of external threading on the oil inlet port of the engine; screwing a lock nut onto an outer portion of external threading on the oil inlet port, thereby retaining the annular adapter on the oil inlet port, the lock nut having a seal shoulder extending opposite the annular adapter; placing an oil filter element within a canister, the oil filter element having an annular front end cap defining an axis, a rear end cap opposing the front end cap, and filtration material attached between the front end cap and the rear end cap and having an elongated annular shape about the axis and defining a clean oil chamber along the axis within the filter element, the canister having a peripheral wall and an end wall attached to the peripheral wall; removably attaching the canister to an outer periphery of the adapter, thereby sealing the oil filter element against the seal shoulder of the lock nut. - View Dependent Claims (16)
-
Specification