Key controlled latch
AssigneeLockwood Australia Pty Ltd.
InventorDavid Garfield Blanch
Life of this patent
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Abstract
Latch assemblies are disclosed including a latch bolt mounted on a casing for relative movement between an extended latching position and a retracted release position, a first actuator operable from the inner side of the assembly to cause movement of the latch bolt to the release position, a lock operable from the inner side of the assembly to adopt an active condition thus render the first actuator inoperable, a second actuator operable from an outer side of the assembly to cause movement of the latch bolt to the release position, and a lock release responsive to operation of the second actuator to render the lock inactive.
Claims32
A latch assembly including, a casing, a latch bolt mounted on the casing so as to be movable relative thereto between an extended latching position and a retracted release position, a first actuator operable from an inner side of the assembly to cause movement of the latch bolt to said release position, locking means operable from said inner side of the assembly to adopt an active condition and thereby render said first actuator inoperable, a second actuator operable from an outer side of the assembly to cause movement of the latch bolt to the release position, lock release means which is responsive to said operation of the second actuator so as to thereby render said locking means inactive, said locking means including a cam member which is movable between first and second positions at which said locking means is inactive and active respectively, cam biasing means urging said cam member towards said first position, and a retaining member engageable with said cam member to thereby prevent movement of said call member out of said second position when said locking means is in the active condition.
Dependencies are inferred from the claim text.