초록 ▼

A free-wheeling lock mechanism for a cylindrical door lock includes inner and outer spindles directly and non-rotatably connected to corresponding inner and outer lever handles. A latch retractor is located between the spindles and a cylindrical outer cam is located within the outer spindle. The out

A free-wheeling lock mechanism for a cylindrical door lock includes inner and outer spindles directly and non-rotatably connected to corresponding inner and outer lever handles. A latch retractor is located between the spindles and a cylindrical outer cam is located within the outer spindle. The outer cam can slide axially in the outer spindle and includes an approximately T-shaped cam slot having longitudinal and circumferential portions forming the T-shape. A cam scoop is located on the perimeter of the outer cam which extends into the latch retractor and operates the latch retractor to open the door when the outer cam is rotated. The outer spindle has an inwardly projecting finger that cooperates with the cam slot to unlock and lock the mechanism as the outer cam slides axially to align the finger with the longitudinal or circumferential portions of the cam slot. In the unlocked position the finger projects into the longitudinal portion of the cam slot so that rotation of the lever handle turns the outer cam and opens the door. In the locked position the finger projects into the circumferential portion of the cam slot so that the finger does not engage the outer cam and rotation of the lever handle does not open the door.

대표청구항 ▼

1. A lock mechanism comprising:a latch retractor; a spindle adapted for non-rotatable connection to a handle, the spindle having an inwardly projecting finger; and a cam rotatably held within the spindle, the cam having a cam scoop and a cam slot, the cam slot having a longitudinal portion and a cir

1. A lock mechanism comprising:a latch retractor; a spindle adapted for non-rotatable connection to a handle, the spindle having an inwardly projecting finger; and a cam rotatably held within the spindle, the cam having a cam scoop and a cam slot, the cam slot having a longitudinal portion and a circumferential portion and the cam scoop retracting the latch retractor when the cam is rotated, the cam being axially slidable relative to the spindle from an unlocked position to a locked position, in the unlocked position the finger projecting inwardly from the spindle into the longitudinal portion of the cam slot to couple the spindle to the cam and in the locked position the finger projecting inwardly from the spindle into the circumferential portion of the cam slot allowing the spindle to free-wheel relative to the cam.