초록 ▼

A lock employing a lock cylinder protected by an outer escutcheon and positioned coaxially with a lock control mechanism and an inner doorknob. An outer doorknob is supported by the outer escutcheon and mounted on an axis which is offset with respect to the axis of the lock cylinder and inner doorkn

A lock employing a lock cylinder protected by an outer escutcheon and positioned coaxially with a lock control mechanism and an inner doorknob. An outer doorknob is supported by the outer escutcheon and mounted on an axis which is offset with respect to the axis of the lock cylinder and inner doorknob. A cam and pushrod arrangement is utilized to transfer rotation of the outer knob to the lock mechanism. The encasing of the lock cylinder within the outer escutcheon instead of the outer knob increases the security of the device by making it more difficult to tamper with the lock cylinder. In addition, slight modifications prevent the application of excess torque to the outer knob from releasing the lock mechanism.

대표청구항 ▼

An offset knob security assembly for use with a cylindrical bored lock of the type having a lock cylinder which cooperates with a cylinder spindle to retract a latch bolt and an outer spindle surrounding the cylinder spindle, said outer spindle cooperating with an inner knob to also retract said lat

An offset knob security assembly for use with a cylindrical bored lock of the type having a lock cylinder which cooperates with a cylinder spindle to retract a latch bolt and an outer spindle surrounding the cylinder spindle, said outer spindle cooperating with an inner knob to also retract said latch bolt, wherein said lock cylinder, cylinder spindle, outer spindle and inner knob are located on a first axis, said security assembly comprising: an outer knob located on a second axis which is offset from said first axis; a first cam connected to the outer spindle; a second cam connected to the outer knob; and a pair of parallel pushrods coupling the second cam to the first cam, whereby rotation of said outer knob will rotate said second cam and impart rotation to first cam and outer spindle through one of said pushrods, wherein the offset arrangement between the outer knob and the lock cylinder and cylinder spindles isolates the lock cylinder and spindles from outside manipulation despite removal of the outer knob.