Brake slack adjustment device

A slack adjuster for a vehicle drum brake, the slack adjuster comprising:

• a sleeve having a neck, a shoulder, and a body extending from the neck, the shoulder extending between the neck and the body;
• a threaded shaft rotatably engaging the neck such that rotation of the threaded shaft extends and retracts the threaded shaft out of and into the neck, the threaded shaft extending through the body;
• a housing being coupled to the sleeve proximate to the shoulder;
• a worm gear being rotatably coupled to the housing and engaging the threaded shaft wherein the threaded shaft is rotated by rotation of the worm gear;
• a head extending outwardly from the housing, the head being coupled to the worm gear, the head having a slot therein, the slot being configured for engagement by a screwdriver wherein the worm gear is configured to be rotated by the screwdriver when the slot engages the screwdriver;
• a first direction of rotation of the worm gear extending the threaded shaft outwardly from the sleeve, the first direction being clockwise;
• a second direction of rotation of the worm gear retracting the threaded shaft inwardly toward the sleeve, the second direction being counterclockwise;
• a first slotted head being affixed to the body, the first slotted head being configured for engagement by a first brake shoe;
• and
• a second slotted head being rotatably coupled to the threaded shaft, wherein the second slotted head remains in an engagement orientation while the threaded shaft rotates to extend or retract, the engagement orientation being configured for the second slotted head to be engaged by a second brake shoe, whereby extension or retraction of the threaded shaft from the neck adjusts a position of the first brake shoe relative to the second brake shoe.