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US 5,052,202 AGranted
Dead bolt locking device
OwnerJerry A. Murphyinventor
Life of this patent
Estimating the term…
Abstract
A locking device for the knob of a reciprocating dead bolt latch for a door having a head portion and downwardly extending spaced apart leg members. The head portion has an aperture adapted to engage the dead bolt latch knob in locking fashion. The leg members define a slot which engages the door knob shank or the door handle.
Claims13
A locking device for locking a dead bolt latch knob in a fixed position, comprising:
- a substantially planar, integrally formed member, having a continuous outer wall substantially perpendicular to the plane of said member, said member comprising a fixed head portion having an aperture passing therethrough, wherein said aperture is defined by a continuous inner wall substantially perpendicular to the plane of said substantially planar head portion, formed within said substantially planar head portion and is adapted to receive and engage the dead bolt latch knob therein;
- and a pair of downwardly projecting co-planar leg members defining an opening therebetween, for engaging opposing sides of a door knob shaft;
- a bore passing laterally through said continuous outer wall and communicating with said continuous inner wall of said aperture in said head portion;
- and
- locking means operably disposed in said bore for frictionally locking the dead bolt knob against said continuous inner wall of said aperture in said head portion.
2 more elements
An apparatus for locking a reciprocating latch bolt of a door in combination with a latch bolt knob, comprising:
- a fixed head member having a cruciform-shaped opening passing therethrough adapted to engage the latch bolt knob in either a vertical or horizontal orientation and in a substantially locked condition, said head member further having a bore passing diagonally through said head member and communicating between said cruciform-shaped opening and an exterior peripheral surface of said head member;
- a pair of co-planar downwardly projecting leg members, said leg members being co-planar with said head member and forming a longitudinal slot therebetween for engaging a door knob shank therein, said leg members each having a lower end inwardly tapered toward said longitudinal slot, thereby narrowing said longitudinal slot between said lower ends, wherein said head member and said pair of co-planar downwardly projecting leg members are formed of a single integral piece of material;
- and
- locking means for resisting movement of said head member when the latch bolt knob is turned, said locking means being operably coupled to said bore passing through said head member and laterally projecting into said cruciform opening.
1 more element
Dependencies are inferred from the claim text.