US PATENT SUBCLASS 70 / 495
.~.~.~.~.~.~.~.~ Including sidebar

Current as of: June, 1999
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70 /   HD   LOCKS

266  DF  OPERATING MECHANISM {6}
336  DF  .~ Key {10}
344  DF  .~.~ Single key {4}
348  DF  .~.~.~ Tumbler type {5}
357  DF  .~.~.~.~ Cylinder type {9}
490  DF  .~.~.~.~.~ Rotary plug {2}
491  DF  .~.~.~.~.~.~ Sliding tumblers {2}
492  DF  .~.~.~.~.~.~.~ Transverse of plug {2}
495.~.~.~.~.~.~.~.~ Including sidebar

DEFINITION

Classification: 70/495

Including slidebar:

(under subclass 492) Device wherein structure, frequently in the nature of a shaft-like element, is included, and wherein the structure serves as an additional impediment to rotation of the plug relative to the cylinder by extending across, at one or more locations, the circular line of demarcation (i.e., the shear line) along which the plug turns relative to the cylinder.

(1) Note. The movement of the sidebar to a nonblocking position requires the repositioning of the tumblers to a location where a means (e.g., a recess) thereon can receive a portion of the sidebar, thus enabling the latter to move clear of the shear line.

(2) Note. In some instances, the tumblers do not move in such a manner as to block the shear line; therefore, the sidebar is not, in those instances, an additional impediment.