초록 ▼

A safety dead-bolt lock adapted to be mounted on a door. The safety dead-bolt lock has a bolt and a rotatable bolt activator. A safety knob is adapted to rotate the bolt activator and thus extend and withdraw the bolt. The safety knob has a rotatable member engaged with the bolt activator and a stat

A safety dead-bolt lock adapted to be mounted on a door. The safety dead-bolt lock has a bolt and a rotatable bolt activator. A safety knob is adapted to rotate the bolt activator and thus extend and withdraw the bolt. The safety knob has a rotatable member engaged with the bolt activator and a stationary member adapted to be fixed to the door. A disengageable interlocking mechanism is adapted to prevent rotation of the rotatable member relative to the stationary member. Depressable tabs mounted in the rotatable member disengage the interlocking mechanism when depressed, allowing the rotatable member to be turned to withdraw and extend the bolt. The tabs are in such an arrangement and are so oriented that they are conveniently presented toward the hand of a user located on the side of the door on which the stationary member is mounted, but the hand of a person reaching from the other side of the door cannot readily assume the position necessary to depress the tabs.

대표청구항 ▼

A safety dead-bolt lock adapted to be mounted on a door comprising: (a) a dead-bolt including a bolt adapted to extend to move longitudinally within the door and a rotatable bolt activator operatively connected to the bolt to extend and withdraw the bolt upon selective rotation of the bolt activator

A safety dead-bolt lock adapted to be mounted on a door comprising: (a) a dead-bolt including a bolt adapted to extend to move longitudinally within the door and a rotatable bolt activator operatively connected to the bolt to extend and withdraw the bolt upon selective rotation of the bolt activator; and (b) a safety knob adapted to be mounted to the door having: (1) a stationary member adapted to be affixed to the door; (2) a rotatable member mounted for rotation to the stationary member and exposed to allow it to be grasped and rotated by the hand of the user, the rotatable member engaged with the bolt activator to rotate it as the rotatable member rotates; (3) interlocking means, having engaged and disengaged positions, for preventing rotation of the rotatable member relative to the stationary member when in its engaged position and permitting rotation of the rotatable member when in its disengaged position; (4) a plurality of depressable tabs mounted to the rotatable member for movement inwardly toward the door when pressed by the fingers of a user and biased to return outwardly toward the user when the user\s fingers release the tabs, the tabs being operatively connected to the interlocking means such that depression of the tabs by the user moves the interlocking means from its engaged position to its disengaged position thereby allowing the user to turn the rotatable member, and wherein release of the tabs by the fingers of a user such that the tabs return to their undepressed position causes the interlocking means to move to its engaged position preventing rotation of the rotatable member with respect to the stationary member.