Abstract: A sealed accumulator is positioned at a location remote from the conventional pressurized liquid cooling system of an internal combustion engine. An overflow conduit communicates between a high point in the system and the accumulator. A make-up conduit communicates between the accumulator and a low point in the system. A normally closed pressure valve, opening in response to system pressure exceeding a predetermined value, is in series with the overflow conduit. In series with the make-up conduit, is a normally closed one-way check valve. Minimum and maximum pressures within the accumulator are regulated respective relief valves. Optionally, a vent valve is installed at a high point for escape of air as coolant is introduced into the system.

Abstract: A sealed accumulator is positioned at a location remote from the conventional pressurized liquid cooling system of an internal combustion engine. An overflow conduit communicates between a high point in the system and the accumulator. A make-up conduit communicates between the accumulator and a low point in the system. A normally closed pressure valve, opening in response to system pressure exceeding a predetermined value, is in series with the overflow conduit. In series with the make-up conduit, is a normally closed one-way check valve. Minimum and maximum pressures within the accumulator are regulated respective relief valves. Optionally, a vent valve is installed at a high point for escape of air as coolant is introduced into the system.

Abstract: A sealed accumulator is positioned at a location remote from the conventional pressurized liquid cooling system of an internal combustion engine. An overflow conduit communicates between a high point in the system and the accumulator. A make-up conduit communicates between the accumulator and a low point in the system. A normally closed pressure valve, opening in response to system pressure exceeding a predetermined value, is in series with the overflow conduit. In series with the make-up conduit, is a normally closed one-way check valve. Minimum and maximum pressures within the accumulator are regulated respective relief valves. Optionally, a vent valve is installed at a high point for escape of air as coolant is introduced into the system.

Abstract: A sealed accumulator is positioned at a location remote from the conventional pressurized liquid cooling system of an internal combustion engine. An overflow conduit communicates between a high point in the system and the accumulator. A make-up conduit communicates between the accumulator and a low point in the system. A normally closed pressure valve, opening in response to system pressure exceeding a predetermined value, is in series with the overflow conduit. In series with the make-up conduit, is a normally closed one-way check valve. Minimum and maximum pressures within the accumulator are regulated respective relief valves. Optionally, a vent valve is installed at a high point for escape of air as coolant is introduced into the system.

Abstract: A sealing and valving assembly includes an upper carrier and a lower carrier sized to be received within the filler neck of the radiator of a pressurized liquid cooling system. The upper carrier, an inverted generally cup-like member, carries an atmospheric seal for closing the open end of the filler neck. The atmospheric seal may seal against the inner side wall or the free end of the filler neck. Both types of atmospheric seals may be incorporated in a single embodiment. A pressure seal, carried by the lower carrier, is normally urged against a seat proximate the fixed end of the filler neck by a cylindrical spring bearing against the upper and lower carriers. Preferably, the lower end of the spring is congruent with the pressure valve seat. The upper carrier is secured by swivel connection to a cap which is detachably securable to the free end of the filler neck. The upper carrier may also be detachably connected to the cap.

Abstract: A coolant reservoir is physically spaced apart from and elevated above the lower surface of an engine cooling system radiator. A coolant transfer conduit permits excess coolant to be transferred from the radiator into the coolant reservoir. A first one way check valve prevents fluid flow from the radiator into the reservoir unless the pressure within the cooling system exceeds a predetermined maximum value. A coolant refill conduit provides a coolant flow path between the reservoir and the radiator. A second one way check valve is coupled in series with the coolant refill conduit and permits coolant to flow from the reservoir into the radiator when the engine cooling system pressure drops below a predetermined value.

Abstract: A pivotally mounted coupling guard, extending over a ball engaging socket of a trailer hitch to preclude disengagement of the socket from the ball, is locked in place to deter unauthorized disengagement of the socket from the ball and theft of the attached trailer. A lock module penetrably receives and locks therein essentially all of the extending ends of both the pivot pin and the retaining pin of the coupling guard to preclude unauthorized pivotal movement of the coupling guard.

Abstract: An attachment bolt extends upwardly through a support member and threadedly engages the ball component of a coupling apparatus. A locking member extends downwardly through the ball component and cammingly engages the attachment bolt with the pitch different than the threaded engagement between the ball component and the attachment bolt. Engagement of the ball component within a complemental coupler component prevents access to and removal of the locking member.

Abstract: A monolithic radiator cap comprising a minimal number of inexpensive constituent parts engages the filler neck of an automotive cooling system. A valving gasket is normally held against the sealing surface of the filler neck by a spring which is responsive to thermal expansion of the cooling medium for controlled fluid flow out of the system. A seal is carried by the cap to engage the interior wall of the filler neck and hermetically seal the filler neck. The seal is maintained during the working and vent positions of the cap. Alternately, the cap includes auxiliary valving means for controlling fluid flow into the system in response to thermal contraction of the cooling medium.

Abstract: A monolithic radiator cap comprising a minimal number of inexpensive constituent parts engages the filler neck of an automotive cooling system. A valving gasket is normally held against the sealing surface of the filler neck by a spring which is responsive to thermal expansion of the cooling medium for controlled fluid flow out of the system. A seal is carried by the cap to engage the interior wall of the filler neck and hermetically seal the filler neck. The seal is maintained during the working and vent positions of the cap. Alternately, the cap includes auxiliary valving means for controlling fluid flow into the system in response to thermal contraction of the cooling medium.

Abstract: An automatic, positive anti-aeration system is assembled to function cooperatively with an engine cooling system radiator as an integral unit. An accumulator, vented to the atmosphere and containing a substantial amount of coolant liquid, is positioned adjacent to the radiator. Two separate fluid passages communicate respectively between the upper portion of one of the header tanks and the accumulator and between the lower portion of one of the header tanks and the accumulator. Valves control fluid flow in the two passages. When the pressure in the header tank rises above the preselected system operating pressure due to heating and expansion of the coolant liquid, the valve in the upper fluid passage opens, allowing coolant liquid and any gases trapped in the top of the header tank to flow into the accumulator. The gases are vented from the accumulator to the atmosphere and the coolant liquid is stored in the accumulator.

Abstract: A coolant reservoir is physically spaced apart from and elevated above the lower surface of an engine cooling system radiator. A coolant transfer conduit permits excess coolant to be transferred from the radiator into the coolant reservoir. A first one way check valve prevents fluid flow from the radiator into the reservoir unless the pressure within the cooling system exceeds a predetermined maximum value. A coolant refill conduit provides a coolant flow path between the reservoir and the radiator. A second one way check valve is coupled in series with the coolant refill conduit and permits coolant to flow from the reservoir into the radiator when the engine cooling system pressure drops below a predetermined value.