Keyhole shutter structure

Details Keyhole shutter structure Keyhole shutter structure

1998-12-01

1999-09-07

Gall, Lloyd A.

Locks

Operating mechanism

Key

70427, 70455, E05B 1300

Patent

active

059469579

ABSTRACT:
A keyhole-shutter structure includes a cylindrical protector block. An upper portion of the protector block includes an approximately square housing portion. A shutter plate is fitted in the housing portion. A cap is placed on the protector block. The bottom of the housing portion has right and left receiving planes for receiving the shutter plate, and a recess formed between the right and left receiving planes in such a manner as to be curved downwardly. Since a recess is provided between right and left receiving planes for receiving a shutter plate, even if the shutter plate is somewhat deformed, the deformed portion interferes to a lesser extent with the recess. Accordingly, a key can be easily inserted into a keyhole even if the shutter plate is somewhat deformed.

REFERENCES:
patent: 1110963 (1914-09-01), Robinson
patent: 2491337 (1949-12-01), Segal
patent: 3142168 (1964-07-01), Wellekens
patent: 3882703 (1975-05-01), Hermann

Affiliated with

Also associated with

Rating

Keyhole shutter structure does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Keyhole shutter structure, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Keyhole shutter structure will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1792537