Locks – Operating mechanism – Key
Reexamination Certificate
2006-09-05
2006-09-05
Gall, Lloyd A. (Department: 3676)
Locks
Operating mechanism
Key
C070S358000, C070S375000, C070S399000, C070S407000, C070S409000, C070S419000
Reexamination Certificate
active
07100409
ABSTRACT:
The present invention provides a burglarproof lock core structure which forms a curved passage between a key slot of a plug and a lower pin chamber, such that at least a bending concave surface offsetting the center of the key slot is formed at one side, and cone apexes of a plurality of lower pins are extended out of the lower pin chamber and aligned in the wall edge of the key slot. Moreover, a control valve with a cone apex is located at the other end corresponding to the bending surface inside the key slot, such that a key with curvature corresponding to the passage and notches corresponding to the cone apexes is required to open the lock, thereby having the effect of high security of burglarproof.
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Gall Lloyd A.
Troxell Law Office PLLC
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