Engine cooling system

Claim 2

A cooling system for an internal combustion engine comprising a radiator core assembly, a pump for circulating coolant through the engine and the radiator core assembly, a coolant tank and a coolant treatment system comprising: a. a degassing conduit between said engine and said tank; b. a coolant filter unit comprising a filter base connected to said tank and said conduit and a filter body detachably connected to said filter base, said base having a filter inlet port communicating said conduit with said filter body and an outlet port communicating said filter body with said tank; c. a valve in saId base between said filter inlet port and said conduit for terminating coolant flow through said filter inlet porT when said filter body is detached from said base to prevent leakage of coolant from said cooling system through said filter inlet; d. structure defining a controlled flow passageway from said conduit to said tank in parallel with said valve and said filter body for venting said conduit when coolant flow through said filter inlet passage is impeded; and, e. passageway means between said filter outlet port and said tank, said passageway meanS opening into said tank above the normal level of coolant therein for preventing the flow of coolant from said tank through said filter outlet port when said filter body is detached from said base.

Claim 3

A cooling system as claimed in claim 1 wherein said valve comprises a valve chamber defined by said base and a valve member in said chamber, said controlled flow passageway defined in part by a flow restricting orifice communicating said valve chamber with said tank and further including a tube connected to said base adjacent said orifice and extending into said tank to a location above the coolant level in said tank whereby fluid vented through said orifice and said tube enters said tank above the level of coolant therein.

Claim 4

a filter outlet port communicating said filter body with said tank; d. valve means in said filter base for blocking coolant flow through said filter inlet port when said filter body is detached from said base; and, e. a tube member between said filter outlet port and said tank, said tube member opening into said tank above the normal level of coolant therein and effective to prevent flow from said tank through said filter outlet port when said filter body is detached from said base.

Claim 5

a filter outlet port communicating said filter body with said tank; d. valve means in said filter base for blocking coolant flow through said filter inlet port when said filter body is detached from said base; and, e. a tube member between said filter outlet port and said tank, said tube member opening into said tank above the normal level of coolant therein and effective to prevent flow from said tank through said filter outlet port when said filter body is detached from said base.

Claim 6

A cooling system as claimed in claim 1 wherein said controlled flow passageway supports a check valve which normally closes said passageway, said check valve opening to provide for flow through said passageway when pressure in said conduit increases a predetermined amount above the pressure in said tank.

Claim 7

A cooling system as claimed in claim 1 wherein said valve comprises a valve chamber defined by said base and a valve member movable in said chamber to open and close said filter inlet port, said valve member including a projection extending through said inlet port, said filter body engaging said projection when connected to said base and maintaining said valve member in its open position.

Claim 8

A cooling system as claimed in claim 4 wherein said valve further includes a biasing spring in said chamber for urging said valve member toward its closed position, and a spring seat against which said spring reacts, said spring seat defining a chamber wall through which said controlled flow passageway extends.

Claim 9

A cooling system for an internal combustion engine comprising a radiator core assembly, a pump for circulating coolant through the engine and the radiator core assembly, a coolant tank and a coolant treatment system comprising: a. a degassing conduit between said engine and said tank b. a coolant filter unit comprising a filter base connected to said tank and said conduit and a filter body detachably connected to said filter base, said base having a filter inlet port communicating said conduit with said filter body and an outlet port communicating said filter body with said tank; c. a valve in said base between said filter inlet port and said conduit for terminating coolant flow through said filter inlet port when said filter body is detached from said base to prevent leakage of coolant from said cooling system through said filter inlet; d. said valve comprising a valve member movable to open and close said filter inlet port and a valve stem extending from said Valve member into a guide hole, said controlled flow passageway defined in part by an annular space between said valve stem and the surrounding guide hole; and, e. structure defining a controlled flow passageway from said conduit to said tank in parallel with said valve and said filter body for venting said conduit when coolant flOw through said filter inlet passage is impeded.

Claim 10

A cooling system for an internal combustion engine comprising a radiator core assembly, a pump for circulating coolant through the engine and the radiator core assembly, a coolant tank and a coolant treatment system comprising: a. a degassing conduit between said engine and said tank b. a coolant filter unit comprising a filter base connected to said tank and said conduit and a filter body detachably connected to said filter base, said base having a filter inlet port communicating said conduit with said filter body and an outlet port communicating said filter body with said tank; c. a valve in said base between said filter inlet port and said conduit for terminating coolant flow through said filter inlet port when said filter body is detached from said base to prevent leakage of coolant from said cooling system through said filter inlet; d. said valve comprising a valve member movable to open and close said filter inlet port and a valve stem extending from said Valve member into a guide hole, said controlled flow passageway defined in part by an annular space between said valve stem and the surrounding guide hole; and, e. structure defining a controlled flow passageway from said conduit to said tank in parallel with said valve and said filter body for venting said conduit when coolant flOw through said filter inlet passage is impeded.

Claim 11

A cooling system for an internal combustion engine comprising a radiator core assembly, a pump for circulating coolant through the engine and the radiator core assembly, a coolant tank and a coolant treatment system comprising: a. a degassing conduit between said engine and said tank; b. a coolant filter unit comprising a filter base connected to said tank and said conduit and a filter body detachably connected to said filtEr base, said base having a filter inlet port communicating said conduit with said filter body and an outlet port communicating said filter body with said tank; c. a valve in said base between said filter inlet port and said conduit for terminating coolant floW through said filter inlet port when said filter body is detached from said base to prevent leakage of coolant from said cooling system through said filter inlet; d. structure defining a controlled flow passageway from said conduit to said tank in parallel with said valve and said filter body for venting said conduit when coolant flow through said filter inlet passage is impeded; and, e. said valve comprising: i. a valve chamber defined by said base; ii. a valve member movably disposed in said chamber to open and close said filter inlet port; iii. a biasing spring in said chamber for urging said valve member toward its closed position; iv. a spring seat member attached to said base and against which said spring reacts; v. said spring seat member defining a chamber wall through which said controlled flow passageway extends, said controlled flow passageway extending through said spring seat member and an adjacent wall of said tank; and, vi. said member including a projection extending through said inlet port, said filter body engaging said projection when connected to said base and maintaining said valve member in its open position.

Claim 12

A cooling system for an internal combustion engine comprising a radiator core assembly, a pump for circulating coolant through the engine and the radiator core assembly, a coolant tank and a coolant treatment system comprising: a. a degassing conduit between said engine and said tank; b. a coolant filter unit comprising a filter base connected to said tank and said conduit and a filter body detachably connected to said filtEr base, said base having a filter inlet port communicating said conduit with said filter body and an outlet port communicating said filter body with said tank; c. a valve in said base between said filter inlet port and said conduit for terminating coolant floW through said filter inlet port when said filter body is detached from said base to prevent leakage of coolant from said cooling system through said filter inlet; d. structure defining a controlled flow passageway from said conduit to said tank in parallel with said valve and said filter body for venting said conduit when coolant flow through said filter inlet passage is impeded; and, e. said valve comprising: i. a valve chamber defined by said base; ii. a valve member movably disposed in said chamber to open and close said filter inlet port; iii. a biasing spring in said chamber for urging said valve member toward its closed position; iv. a spring seat member attached to said base and against which said spring reacts; v. said spring seat member defining a chamber wall through which said controlled flow passageway extends, said controlled flow passageway extending through said spring seat member and an adjacent wall of said tank; and, vi. said member including a projection extending through said inlet port, said filter body engaging said projection when connected to said base and maintaining said valve member in its open position.

Claim 13

The system of claim 7 wherein said valve member further includes a stem projecting through a guide opening in said spring seat member, said flow passageway defined by the space between said valve stem and said guide opening.

Claim 14

The system claimed in claim 7 and further including a check valve disposed in said spring seat member for closing said flow passageway when pressure in said valve chamber is less than pressure in said tank.

Claim 15

A coolant filter for an internal combustion engine cooling system comprising a coolant tank and a conduit connected between the engine and said tank, said filter comprising: a. a filter base attached to said tank on an exterior wall thereof; b. a filter body detachably connected to said filter base and projecting from said filter base exteriorly of said tank; c. said filter base attached to said conduit and comprising:

Claim 16

A coolant filter for an internal combustion engine cooling system comprising a coolant tank and a conduit connected between the engine and said tank, said filter comprising: a. a filter base attached to said tank on an exterior wall thereof; b. a filter body detachably connected to said filter base and projecting from said filter base exteriorly of said tank; c. said filter base attached to said conduit and comprising:

Claim 17

The filter claimed in claim 10 wherein said filter body is a discardable unit.

Claim 18

The filter claimed in claim 10 further including a flow passageway in said base between said conduit and said tank around said filter and said valve, said flow passageway impeding coolant flow around said filter.

Claim 19

The filter claimed In claim 10 wherein one of said filter ports is defined by a threaded tubular projection on said filter base, said filter body threaded onto said projection into fluid tight contact with said base.