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Lawrence Brothers, Inc. Patents
Assignee:
Lawrence Brothers, Inc.
Address:
Sterling, IL
No. of patents:
26
Patents:












Patent Number Title Of Patent Date Issued
D305403 Combined rescue door stop and striker plate January 9, 1990
5713105 Adjustable hinge February 3, 1998
A vertically adjustable hinge which permits easy, small and precise vertical adjustments. The hinge includes a body, a first leaf and a second leaf. It should be noted that the hinge may be provided only as a body and a first leaf for retro-fitting on to an existing second leaf. The body
4552094 Horse stall construction November 12, 1985
There is disclosed a door or wall construction which comprises vertically spaced upper and lower horizontal frame members and horizontally spaced vertical side frame members coupled with the upper and lower frame members to define a rectangular frame. A panel is joined with the lower fra
4538323 Bearing supported truck assembly for sliding door September 3, 1985
There is disclosed a truck assembly which is movable along a track and adapted to support a door panel, or the like, for corresponding movement. The truck assembly comprises wheel members mounted to a pair of axles. The axle are in turn supported by a carriage assembly which includes bea
4513555 Barn door framing system April 30, 1985
There is disclosed a door framing system for a barn door or the like wherein a plurality of horizontal and vertical frame members are joined together to define a generally rectilinear frame structure. All of the frame members are fabricated from substantially U-shaped channel members
4513554 Barn door framing system April 30, 1985
There is disclosed a door framing system for a barn door or the like wherein a plurality of horizontal and vertical frame members are joined together to define a generally rectilinear frame structure. All of the frame members are fabricated from substantially U-shaped channel members
4513535 Barn door framing system April 30, 1985
There is disclosed a door framing system for a barn door or the like wherein a plurality of horizontal and vertical frame members are joined together to define a generally rectilinear frame structure. All of the frame members are fabricated from sustantially U-shaped channel members of
4359804 Load supporting hinge structure with concealed angular bearing November 23, 1982
There is disclosed an improved load supporting hinge structure which includes concealed bearing units, disposed within an intermediate knuckle of one of the hinge leaves and adjacent to the spaced end knuckles of the other one of the hinge leaves to afford both the desired support and
4340246 Latch assembly July 20, 1982
A latch assembly holds a free hanging door against a support frame. The assembly includes a base adapted to be mounted to the support frame which includes a latch recess. A handle is pivotally mounted to the base and has a latch projection at one end thereof. A hook is coupled to the oth
4339845 Spring hinge July 20, 1982
There is disclosed a spring hinge comprised of a pair of hinge leaves each having at least one tubular hinge knuckle, the knuckles being in axial alignment to define a bore, a torsion spring member extending axially through the knuckle bore and having its opposite ends affixed to a pair
4295514 Bifold door hinge assembly October 20, 1981
There is disclosed a hinge structure for a bifold door assembly or the like, which includes first and second leaf members, the first leaf member comprising a generally flat mounting or leaf portion and a knuckle portion. The knuckle portion includes one or more and preferably a pair of
4288887 Frame corner connector September 15, 1981
A corner connector arrangement is disclosed for use in joining like vertical and horizontal frame sections for use in framing panels in the assembly of sliding doors. The connector, comprised of two clamp sections and having protrusions bearing against the frame sections, is easily a
4216986 Releasable door stop assembly August 12, 1980
There is disclosed a releasable door stop assembly for a bidirectionally swinging door including a retractable stop member which normally permits opening of the door in one direction, thus acting as a stop against opening of said door in the opposite direction. The stop member is free
4193245 Door frame construction March 18, 1980
There is disclosed a door frame construction, preferably of metal, which comprises cross channel members assembled perpendicularly with a pair of parallel upright channel members to form a rectangular frame. The respective channel members are held in assembled squared relation by a n
4168409 Security hinge with sealed switch and operator concealed therein September 18, 1979
A security hinge construction includes a pair of hinge leaves each having at least one knuckle. An electric switch is fixedly mounted within one of the knuckles and a switch operating means is disposed within the other knuckle. The switch or electrical component is sealed within its
4141123 Method of manufacturing a spring hinge February 27, 1979
A plug is offered to make relatively easy and simple the assembly and pre-torquing of a spring-loaded hinge for doors and the like. These hinges comprise a pair of hinge leaves, each leaf defining at least one hollow hinge knuckle aligned with a hinge knuckle defined on the opposite leaf
4116514 Security hinge September 26, 1978
A security hinge is disclosed which includes a pair of leaves, having respectively, at least a pair of spaced end knuckles and at least one immediate knuckle disposed therebetween. Each knuckle includes a central axial bore, the bores being aligned co-axially. A pair of pins are prov
4109346 Pivot and support mounting assembly August 29, 1978
There is disclosed a pivot and support mounting arrangement for a pivotal door arrangement which permits the door to be adjusted quite easily with respect to the door frame. The arrangement includes a pintle assembly carried by the door and a support arrangement mounted proximate to a lo
4102013 Tamper-proof spring hinge July 25, 1978
A plug is offered to make relatively easy and simple the assembly and pre-torquing of a spring-loaded hinge for doors and the like. These hinges comprise a pair of hinge leaves, each leaf defining at least one hollow hinge knuckle aligned with a hinge knuckle defined on the opposite leaf
4097959 Load supporting hinge structure July 4, 1978
There is disclosed an improved load supporting hinge structure which includes bearing units disposed between adjacent knuckles of the leaves of the hinge to afford both the desired support and smooth operation thereof. Each of the knuckles of the hinge structure includes a central axial
4059162 Drilling unit for stadium seats November 22, 1977
A drilling machine is disclosed for use in providing bolt holes in concrete stadium riser steps and the like. The drilling machine includes a relatively stationary base plate, and a foot plate slideable upon the base plate along a predetermined path. The foot plate carries drill mounting
4049934 Security hinge having adjustable cam operator and reciprocable cam follower actuated switch September 20, 1977
There is disclosed a security hinge construction comprising a pair of hinge leafs adapted for attachment to a door or a door frame, or the like. Each leaf includes at least one knuckle which is disposed adjacent to and is moveable relative to the knuckle on the other of said leaves. An
4045065 Releasable door stop and strike plate assembly for a bidirectional swinging door August 30, 1977
The embodiment of the invention disclosed herein is directed to a door stop assembly for a bidirectional swinging door to permit opening the door in a first direction during normal use and to permit selective opening of the door in a second direction during an emergency. The stop is empl
4000540 Spring loaded, adjustable walking door hinge January 4, 1977
Two door pivot units are provided for causing radially outward or walking door motion when the door undergoes angular opening motion. In a first pivot unit, a cam follower is pushed with increasing force against a cam as the door opens by an adjustable biasing device. In a second unit, a
3946460 Releasable door stop and strike plate assembly for a bidirectional swinging door March 30, 1976
The embodiment of the invention disclosed herein is directed to a door stop assembly for a bidirectional swinging door to permit opening the door in a first direction during normal use and to permit selective opening of the door in a second direction during an emergency. The stop is empl
3932913 Pivot assembly January 20, 1976
The present invention relates generally to improvements in pivot assemblies for vertically hung doors and more particularly to novel practical pivot assemblies for use with door members of the type in which the pivoted vertical edge thereof is in substantial abutting relation with a

 
 
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