Rotation restricted barrel lock and key
AssigneeDeWalch Technologies, Inc.
InventorNorman Binz DeWalch
Life of this patent
Estimating the term…
Abstract
A rotation restricted barrel lock and key includes a rotationally actuated barrel lock and a key for opening the lock. The key comprises a lock engaging portion rigidly attached to a handle, and a sleeve rotatably mounted on the handle shaft. The sleeve may slide axially along the shaft within preset limits. Lock actuation is characterized by rotation of the lock engaging portion of the key relative to the lock. During actuation of the lock, a set of prongs on the sleeve engages a complementary set of notches on the barrel lock, thereby non-rotatably coupling the barrel lock to the sleeve. By grasping the sleeve, the user can prevent rotation of the lock while turning the key handle, and thus actuate the lock.
Claims10
A key for operating a lock,
- said key comprising:
- a sleeve having a first end, a second end, a central axis, an interlocking surface at said first end, and an axial bore extending therethrough,
- a shaft mounted in said bore in said sleeve, said shaft having first and second ends, said shaft being always rotatable relative to said sleeve, and
- a lock actuating portion rigidly attached to said first end of said shaft,
- said shaft being oriented in said bore such that sad lock actuating portion extends from said first end of said sleeve, said lock actuating portion being configured to actuate a barrel type lock upon rotation of said lock actuating portion about said central axis.
A lock comprising:
- an external case comprising a generally cylindrical head portion and a smaller diameter shank portion disposed at one end of said head portion, said head portion defining a central axis;
- a key receiving face comprising a key receiving hole, an intermediate surface extending from said key receiving hole to the outermost extent of said key receiving face, and shaped means extending axially from said intermediate surface for receiving complementary shaped means on a key, said key receiving face defining the end of said head portion opposite said shank portion;
- and
- retaining means extensible from said shank portion of said external case upon rotation of said lock relative to a key about said central axis.
Dependencies are inferred from the claim text.