Importance

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Abstract

An improved lock guarded from being sabotaged by prying or cutting has a round latch rod and a lock assembly that are separably locked together by way of retaining balls housed and limited in holes in a rotary unit which is spring biased so as to retractably move back and forth in a sleeve. A limiting stopper having a flanged end which is provided with a pair of opposite cuts in correspondence to the retaining balls. The retaining balls are in general limited by the flanged end without being movable up and down so that a latch rod having a groove in which the retaining balls can be housed is locked in place once the latch head is forced into engagement with the retaining balls. The retaining balls can only be freed as long as the cuts of the flanged end of the limiting stopper are put in alignment with the retaining balls either by pushing the latch rod against the spring biased rotary unit, causing the rotary unit to separate from the retaining unit, or by spinning the rotary unit with a key to get the retaining balls aligned with the cuts of the retaining unit. The latch rod can only be released by a key which rotates the rotary unit into alignment with the cuts of the retaining unit so that the retaining balls housed in a groove of the latach head are movable up and down.

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First Claim