# US 5,699,759 A · Free-flow buoyancy check valve for controlling flow of temperature control fluid from an overflow bottle > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,699,759 A - Document ID: US5699759A - Status: Granted - Kind: A - Application number: 08/576,713 - Filed: 1995-12-21 - Granted: 1997-12-23 - Earliest claimed: 1995-12-21 - Assignees: Thomas J. Hollis - Inventors: Thomas J. Hollis - Web page: https://patentgrep.com/patent/US5699759A ## CPC - F01P 3/20: Cooling circuits not specific to a single part of engine or machine (F01P3/22 takes precedence) - F01P 2007/146: {using valves} - F01P 2023/08: Microprocessor; Microcomputer - F01P 2025/08: Temperature - F01P 2025/13: Ambient temperature - F01P 2025/40: Oil temperature - F01P 2037/02: starting - F01P 2060/04: Lubricant cooler - F01P 2060/08: Cabin heater - F01P 2060/10: Fuel manifold - F01P 2060/16: Outlet manifold - F01P 2070/08: Using lubricant pressure as actuating fluid - F01P: COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES (arrangements in connection with cooling of propulsion units in vehicles B60K11/00; heat-transfer, heat-exchange or heat-storage materials C09K5/00; {cooling of gas-turbine engines F02C7/12}; heat exchange in general, radiators F28) ## Abstract A valve for controlling flow of temperature control fluid between a radiator fluid overflow container and a water pump. The valve includes a housing which is in communication with the fluid overflow container and adapted to receive a flow of temperature control fluid therefrom. The housing has a chamber formed in it for channeling a flow of temperature control fluid. The housing is also in communication with the water pump and adapted to channel a flow of temperature control fluid between the chamber and the water pump. In one embodiment, the valve includes a cap attached to the housing and having a channel formed in it which conducts fluid between the fluid overflow container and the valve chamber. A ball is slidably disposed within the valve chamber and is adapted to seal the channel in the cap to prevent fluid flow when the valve housing receives a flow of pressurized fluid from the water pump. The ball is also adapted to seal the housing to prevent flow to the water pump when the fluid overflow container has a low level of fluid contained therein. A spring is located between the ball and the cap and biases the ball away from sealing the channel. ## Claims ### Claim 1 A valve for controlling flow of temperature control fluid between a radiator fluid overflow container and a water pump in an internal combustion engine, the valve comprising a housing in communication with the fluid overflow container and adapted to receive a flow of temperature control fluid therefrom, the housing having a valve chamber formed therein for channeling a flow of temperature control fluid, the housing also being in communication with the water pump and adapted to channel a flow of temperature control fluid between the valve chamber and the water pump; and means disposed within the valve housing for controlling flow of temperature control fluid between the fluid overflow container and the water pump, wherein the means for controlling flow of temperature control fluid includes a cap attached to the valve housing and having a channel formed therein which is adapted to conduct fluid flow between the fluid overflow container and the valve chamber. ### Claim 2 (depends on 1) A valve according to claim 1 wherein communication between the water pump and the valve chamber is provided by an outlet tube which has one end attached to the water pump and another end attached to a check valve outlet formed on the valve housing and in communication with the valve chamber. ### Claim 3 (depends on 1) A valve according to claim 1 wherein the valve housing is formed integral with the fluid overflow container. ### Claim 4 (depends on 1) A valve according to claim 1 wherein the means for controlling flow of temperature control fluid further includes a ball slidably disposed within the valve chamber and adapted to seal the channel in the cap to prevent fluid flow therethrough when the valve housing receives a flow of pressurized fluid from the water pump, the ball furthermore being adapted to seal the check valve outlet to prevent flow therethrough when the fluid overflow container has a low level of fluid contained therein. ### Claim 5 (depends on 4) A valve according to claim 4 wherein the means for controlling flow of temperature control fluid further includes a biasing means disposed between the ball and the cap for biasing the ball away from sealing the channel. ### Claim 6 A valve for controlling flow of temperature control fluid between a radiator fluid overflow container and a water pump in an internal combustion engine, the valve comprising: a housing in communication with the fluid overflow container and adapted to receive a flow of temperature control fluid therefrom, the housing having a valve chamber formed therein for channeling a flow of temperature control fluid, the housing also being in communication with the water pump and adapted to channel a flow of temperature control fluid between the valve chamber and the water pump, a cap attached to the valve housing and having a channel formed therein which is adapted to conduct fluid flow between the fluid overflow container and the valve chamber; a ball slidably disposed within the valve chamber and adapted to seal the channel in the cap to prevent fluid flow therethrough when the housing receives a flow of pressurized fluid from the water pump, the ball furthermore being adapted to seal the check valve outlet to prevent flow therethrough when the fluid overflow container has a low level of fluid contained therein; and a spring disposed between the ball and the cap for biasing the ball away from sealing the channel. ### Claim 7 A system for controlling flow of temperature control fluid comprising: an fluid overflow container; a water pump; and a valve in communication with the fluid overflow container and the water pump and adapted to control flow of temperature control fluid between the fluid overflow container and the water pump, the valve includes a housing, and a chamber formed within the housing for conducting a flow of temperature control fluid between a cap and a check valve outlet, the cap being in communication with the fluid overflow container, and the check valve outlet being in communication with the water pump. ### Claim 8 (depends on 9) A system for controlling flow of temperature control fluid according to claim 9 wherein the cap is attached to the housing and has a channel formed therein which is adapted to conduct fluid flow between the fluid overflow container and the chamber; the valve further comprising a ball slidably disposed within the chamber and adapted to seal the cap channel to prevent fluid flow therethrough when the housing receives a flow of pressurized fluid from the water pump, the ball furthermore being adapted to seal the check valve outlet to prevent flow therethrough when the fluid overflow container has a low level of fluid contained therein; and a spring disposed between the ball and the cap for biasing the ball away from sealing the cap channel. ### Claim 9 (depends on 7) A system for controlling flow of temperature control fluid according to claim 7 wherein communication between the water pump and the valve is provided by an outlet tube which has one end attached to the water pump and another end attached to a check valve outlet formed on the valve. ### Claim 10 (depends on 7) A system for controlling flow of temperature control fluid according to claim 7 wherein the valve is formed integral with the fluid overflow container. ### Claim 11 (depends on 7) A system for controlling flow of temperature control fluid according to claim 7 wherein the valve is a solenoid valve. ### Claim 12 A system for controlling flow of temperature control fluid comprising: an fluid overflow container; a water pump; a valve in communication with the fluid overflow container and the water pump and adapted to control flow of temperature control fluid between the fluid overflow container and the water pump; and an air bleed tube disposed between and attached to the water pump and the fluid overflow container, the air bleed tube adapted to vent air from within the water pump. ### Claim 13 (depends on 12) A system for controlling flow of temperature control fluid according to claim 12 wherein the air bleed tube is mounted on the water pump at a point where the fluid transitions between vacuum and pressure. ### Claim 14 (depends on 12) A system for controlling flow of temperature control fluid according to claim 12 wherein the valve includes: a housing; a chamber formed within the housing for conducting a flow of temperature control fluid between a cap and an check valve outlet, the cap being in communication with the fluid overflow container, and the check valve outlet being in communication with the water pump. ### Claim 15 (depends on 12) A system for controlling flow of temperature control fluid according to claim 12 wherein the valve includes a chamber; and a means disposed within the chamber for controlling flow of temperature control fluid between the fluid overflow container and the water pump. ### Claim 16 (depends on 12) A system for controlling flow of temperature control fluid according to claim 12 wherein communication between the water pump and the valve is provided by an outlet tube which has one end attached to the water pump and another end attached to a check valve outlet formed on the valve. ### Claim 17 (depends on 12) A system for controlling flow of temperature control fluid according to claim 12 wherein the valve is formed integral with the fluid overflow container. ### Claim 18 A system for controlling flow of temperature control fluid comprising: an fluid overflow container; a water pump; and a solenoid valve in communication with the fluid overflow container and the water pump, the solenoid valve adapted to receive signals for controlling flow between the fluid overflow container and the water pump, the solenoid valve inhibiting flow of temperature control fluid into the fluid overflow container from the water pump, and preventing flow of air from the fluid overflow container to the water pump.