Rotating pin tumbler side bar lock with side bar control
First Claim
Patent Images
1. A cylinder lock of the type having a rotatable cylinder with an axis and a keyway, the lock being controlled by rotatable reciprocating tumblers which are selectively contacted by a side bar under control of a key, with the improvements comprising;
- a moveable member separate from the tumblers and operable by contact with the key and cooperating with the side bar to control locking movement of the side bar and control operation of the lock, wherein the moveable member is a slider which slides in the cylinder parallel to the axis of the cylinder.
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Accused Products
Abstract
A twisting tumbler lock with a side bar is provided with additional levels of security by a axially reciprocable slider which is normally positioned to block operation of the side bar but is moved by a specially configured key to free operation of the side bar. This provides a third level of locking security, it also allows master keying. The unique key has a portion of a rib formed to cooperate with the slider to further allow key control.
105 Citations
15 Claims
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1. A cylinder lock of the type having a rotatable cylinder with an axis and a keyway, the lock being controlled by rotatable reciprocating tumblers which are selectively contacted by a side bar under control of a key, with the improvements comprising;
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a moveable member separate from the tumblers and operable by contact with the key and cooperating with the side bar to control locking movement of the side bar and control operation of the lock, wherein the moveable member is a slider which slides in the cylinder parallel to the axis of the cylinder. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A cylinder lock combination, including a rotatable cylinder with an axis and a keyway therein, the cylinder being controlled by rotatable reciprocating tumblers which contact and further control a side bar with the improvements comprising,
a slider carried by the cylinder, a spring for biasing the slider to a position toward entrance of the keyway, the slider having spaced tangs, the side bar having spaced projections, the tangs on the slider and the projections on the side bar interfering with each other to prevent operation of the side bar unless the slider is moved against the bias of the spring until the tangs of the slider are within spaces between the side bar projections, the slider having a projection with a contact surface which extends into the keyway, and a key configured for insertion into the keyway, the key having a contact surface for contacting the contact surface of the projection on the slider and moving the slider against the bias of the spring to a position where the tangs on the slider clear the projections on the side bar.
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13. A key and a cylinder lock having a rotatable cylinder with an axis and a keyway, rotatable reciprocating tumblers, a movable side bar for contacting the tumblers and a slider for controlling operation of the side bar, a projection on the slider extending into the keyway;
- the key comprising a key bow, a key blade with a profile complementary to the configuration of the profile of the keyway, at least one rib on the key, and a contact surface on the rib for cooperating with the projection and moving the slider in the cylinder parallel to the axis of the cylinder to unblock the side bar.
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14. A cylinder lock having a rotatable cylinder with an axis and a keyway therein, the lock being controlled by rotatable reciprocating tumblers which contact and control a side bar, with the improvement comprising,
a slider carried by the cylinder, a spring for biasing the slider toward the entrance to the keyway, the slider having spaced tangs, the side bar having spaced projections, the tangs on the slider and the projections on the side bar interfering with each other to prevent operation of the side bar unless the slider is moved against the bias of the spring until the tangs of the slider are within spaces between the side bar projections, and the slider having a projection with a contact surface which extends into the keyway for cooperation and activation by a proper key insertable into the keyway.
Specification