Patent ID: 7248163

Claim:
A knob assembly with a lock and a status indicator for being mounted in a door with an inside surface and an outside surface, and the knob assembly comprises a tubular lock having a body adapted to be mounted in the door and having an outer surface; an inner surface; an inner side; and an outer side; an inner doorknob mounted rotatably on the inner surface of the body and having a through hole formed through the inner doorknob; a latch mounted slidably on the outer side of the body; a shaft being hollow, mounted inside the body and having a side; an inner surface; and a slot formed longitudinally through the side of the shaft; a pushing rod mounted slidably in the shaft between the body and the inner knob and having an inner end; an outer end; and a button mounted on the outer end of the pushing rod and extending out of the through hole in the inner knob; a switch mounted on the body, activated by the pushing rod and having a trigger depressed selectively by the pushing rod to activate the switch; an indicator having a panel mounted on the outer surface of the body; and an illuminating device mounted on the panel; and a battery container mounted on the inside surface of the door and having at least one battery mounted in the battery container; and multiple electrical leads connected to the switch, the at least one battery and the illuminating device to control the illuminating device.