Back to results
US 5,553,351 AGranted
Hinge-lock security system
OwnerWilliam R. Starksinventor
Life of this patent
Estimating the term…
Abstract
A hinge-lock security system for preventing relative motion between a door and a door frame.
Claims15
Apparatus for preventing relative motion between a door and a door frame, comprising:
- a) a door having a chamber therein;
- b) a door frame;
- c) a hinge for attachment to and providing relative motion between said door and said door frame, said hinge comprising a first leaf for attachment to said door frame and a second leaf for attachment to said door, said first leaf comprising a latch and said second leaf comprising a slot for receiving said latch within said chamber, said first leaf and said second leaf each comprising at least one cylindrical knuckle having a bore extending therethrough, said cylindrical knuckles of said first leaf and said second leaf being axially aligned to define a cylindrical aperture extending therethrough, wherein a pin for preventing disengagement of said first leaf and said second leaf extends within said cylindrical aperture;
- d) locking means for preventing relative motion between said door and said door frame, said locking means being disposed within said door chamber adjacent said hinge, and being alternately movable between a first unlocked position, whereby relative motion between said door and said door frame is permitted, and a second locked position, wherein said locking means engages said latch and prevents relative motion between said door and said door frame.
1 more element
Apparatus for preventing relative motion between a door and a door frame, comprising:
- a) a door;
- b) a door frame having a chamber therein;
- c) a hinge for attachment to and providing relative motion between said door and said door frame, said hinge comprising a first leaf for attachment to said door and a second leaf for attachment to said door frame, said first leaf comprising a latch and said second leaf comprising a slot for receiving said latch within said chamber, said first leaf and said second leaf each comprising at least one cylindrical knuckle having a bore extending therethrough, said cylindrical knuckles of said first leaf and said second leaf being axially aligned to define a cylindrical aperture extending therethrough, wherein a pin for preventing disengagement of said first leaf and said second leaf extends within said cylindrical aperture;
- d) locking means for preventing relative motion between said door and said door frame, said locking means being disposed within said door frame chamber adjacent said hinge, and being alternately movable between a first unlocked position, whereby relative motion between said door and said door frame is permitted, and a second locked position, wherein said locking means engages said latch and prevents relative motion between said door and said door frame.
1 more element
Dependencies are inferred from the claim text.