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US 7,114,470 B2Granted
Safety-cap system for an engine cooling device and a method
AssigneeSundram Fasteners Limited
InventorsPremkumar Ramanathan, Giri Prasad Rajagopal, Kumaresan Narayanaswamy
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Abstract
The present invention provides a safety cap system with a pressure and temperature activated external locking cum unlocking means for an automotive cooling system to prevent accidental removal of the safety cap. The safety cap further uses a torque overriding mechanism to ensure an effective closure and removal torque.
Claims21
A safety cap system for engine cooling devices, said system comprising:
- (a) a removable safety cap with torque overriding means, coupled firmly to the neck of a reservoir container storing cooling material, said safety cap provided with a circumferential flange;
- (b) at least an external locking and unlocking element, disposed on the reservoir container, in close proximity with the flange to engage or disengage the flange of the safety cap, said locking and unlocking element having a sealing arrangement;
- and
- (c) a pressure and temperature sensitive metallic helical sensor housed in said locking and unlocking element to sense variations in pressure and temperature levels of the cooling material and to effect the locking or unlocking of the safety cap.
1 more element
A method of providing a fail-proof safety cap system for engine cooling devices, said method comprising the steps of:
- (a) coupling the safety cap to a reservoir container of a cooling device and tightening it effectively by torque overriding means;
- (b) locking the safety cap externally by directing the movable shaft of a plunger device towards a flange of the safety cap, to arrest the rotary movement of the safety cap, whenever pressure and temperature conditions in the reservoir container are above normal levels;
- and
- (c) unlocking the safety cap, to facilitate rotary movement after the pressure and temperature conditions return below the pre-determined limit.
1 more element
Dependencies are inferred from the claim text.