Patent ID: 7918116
Filing Date: 2011-04-05
Classification: E05B,Y10T

Abstract:
1. A deadbolt knob restrictor used with a deadbolt lock on a door that includes an inside turn knob and an inside cover plate, comprising: a. a ring member located on the inside surface of a door and under the cover plate of a deadbolt lock and located on the inside surface on a door, said ring member includes a center opening and a laterally extending flange surface; b. two parallel support arms perpendicularly aligned on said flange surface of said ring member, said support arms being spaced apart forming a wide void area between them, when said ring member is located under the cover plate of the deadbolt lock each said support arm extends perpendicularly from and lateral to the cover plate, each said support arm includes a distal edge; c. a hinge transversely aligned and supported by said distal edges of said support arms, said hinge being parallel with said ring member; d. an L-shaped latch connected to said hinge and able to be rotated over said support arms in an 180 degree arc that extends from said center opening of said ring member and extending over said hinge, said latch includes a long leg and a middle leg said long leg and said middle leg being sufficient size so that when said latch is rotated on said support arms and extended transversely and inward over the cover plate on the deadbolt lock, said middle leg abuts the turn knob on the deadbolt lock when rotated to a locked position and prevents rotation of the turn knob; and, e. a spring loaded piston located between said hinge and said latch, said spring creates a biasing force against said latch to hold said latch in a transversely and inward position over the cover plate and to hold said middle section against the turn knob.