Pressure deactivated torque override coolant cap
First Claim
1. A cap apparatus adapted to be coupled to a threaded filler neck of a coolant reservoir, the cap comprising a cover;
- a main body, the main body including threads for engagement with threads of a filler neck; and
a means for transmitting torque applied to the cover to the main body that enabling the threads of main body to engage the threads of the filler neck, the torque override means limiting the maximum torque that can be transmitted from the cover to the main body;
a means for preventing torque from being transmitted from the cover to the main body to unscrew the main body from the filler neck while the coolant reservoir is pressurized;
a means for preventing the coolant pressure from exceeding an upper predetermined level; and
a means for preventing the coolant pressure from falling below a lower predetermined level.
3 Assignments
0 Petitions
Accused Products
Abstract
A cap for use on the threaded filler neck of a coolant reservoir, such as an automobile radiator, comprising a cover and main body and including: a means for transmitting torque from the cover to the main body to screw the cap onto the filler neck. The cap but for preventing excess torque from being transmitted. The cap includes a second torque transmission means for unscrewing the cap, which does not limit the torque that can be transmitted. The cap also includes a means for preventing the cap from being unscrewed when the coolant is under pressure; a pressure relief means to prevent the coolant pressure from exceeding a predetermined level; and a vacuum relief means for preventing the coolant pressure from falling below a second predetermined level.
47 Citations
12 Claims
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1. A cap apparatus adapted to be coupled to a threaded filler neck of a coolant reservoir, the cap comprising a cover;
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a main body, the main body including threads for engagement with threads of a filler neck; and
a means for transmitting torque applied to the cover to the main body that enabling the threads of main body to engage the threads of the filler neck, the torque override means limiting the maximum torque that can be transmitted from the cover to the main body;
a means for preventing torque from being transmitted from the cover to the main body to unscrew the main body from the filler neck while the coolant reservoir is pressurized;
a means for preventing the coolant pressure from exceeding an upper predetermined level; and
a means for preventing the coolant pressure from falling below a lower predetermined level.
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2. A cap apparatus adapted to be coupled to a threaded filler neck of a coolant reservoir, the cap comprising a cover;
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a main body, the main body including threads for engagement with threads of a filler neck; and
a means for transmitting torque applied to the cover to the main body that enables the threads of main body to engage the threads of the filler neck, the torque override means limiting the maximum torque that can be transmitted from the cover to the main body. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A cap apparatus adapted to be coupled to a threaded filler neck of a coolant system, the cap comprising a cover;
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a main body, the main body including threads for engagement with the threads of a filler neck;
a means for transmitting torque applied to the cover to the main body and enabling the threads of main body to engage the threads of a filler neck, the means for transmitting torque limiting the maximum torque that can be transmitted from the cover to the main body, the and including fingers extending from the top wall of the cover, teeth on the main body upper wall, and a drive spring, where each of the teeth includes a first and second flank, the first flank is raked; and
where the spring is disposed between the cover and main body, so as to push the cover and main body toward each other to engage teeth and fingers except when coolant is at or below a predetermined pressure.
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Specification