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US 5,772,265 AGranted
Door security lock
OwnerAnthony Odell Gilbertinventor
Life of this patent
Estimating the term…
Abstract
A drop bolt system provides a low profile, simplified arrangement of a central metal plate, a metal doorjamb restraint and a plate latch. This system prevents overriding the door security system from a position exterior to the protected door.
Claims11
A drop bolt system for door security comprising:
- a. a doorjamb restraint mounted to a doorjamb and a cripple underlying the doorjamb such that the restraint protrudes from the doorjamb;
- b. an elongate central metal plate having an upper edge and a mid-point along the length of the plate, rotatably mounted to a doorjamb frame, that releasably engages the doorjamb restraint at the mid-point of the plate;
- and
- c. a central plate latch that engages the upper edge of the central plate to releasably secure the central plate in engagement with the doorjamb restraint to prevent rotational movement of the central metal plate.
1 more element
A drop bolt system for door security comprising:
- a. a doorjamb restraint mounted to a doorjamb and a cripple underlying the doorjamb such that the restraint protrudes from the doorjamb;
- b. an elongate central metal plate having a mid-point on the length of the plate, an upper edge, and a hole therethrough, rotatably mounted to a doorjamb frame, that releasably engages the doorjamb restraint;
- and
- c. a pin insertable through the central plate hole to prevent rotation of the central plate.
1 more element
A method of securing a door against unauthorized entry comprising the steps of:
- a. securing a doorjamb restraint to a doorjamb and a cripple underlying the doorjamb, the restraint protruding into dwelling space between the doorjamb and a door;
- b. rotatably mounting a central plate to a door casing so that the central plate hangs free in an unlatched state and engages the doorjamb restraint in a latched state such that a portion of the central plate extends over the door casing and an equal portion of the central plate extends over the door;
- and
- c. movably mounting a plate latch to the doorjamb restraint to releasably secure the central plate in a latched state to prevent rotational movement of the central metal plate.
1 more element
Dependencies are inferred from the claim text.