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R. D. Werner Co., Inc. Patents
Assignee:
R. D. Werner Co., Inc.
Address:
Greenville, PA
No. of patents:
21
Patents:




Patent Number Title Of Patent Date Issued
D340773 Ladder top October 26, 1993
D340291 Ladder pail shelf October 12, 1993
D310884 Cover for tops of ladders September 25, 1990
5366051 Hollow plastic ladder November 22, 1994
The present invention pertains to a ladder. The ladder includes a first plastic side rail, at least a portion of which is hollow. The ladder also includes a second plastic side rail, at least a portion of which is hollow. The second side rail is in parallel with the first side rail.
5297889 Packaging clip March 29, 1994
A packaging clip for maintaining a first side rail of a ladder adjacent a second side rail of a ladder. The clip comprises a first portion for removably holding the first side rail and a second portion for removably holding the second side rail. The clip also is comprised of a support
5259480 Ladder top November 9, 1993
The present invention is a ladder top for a ladder. The ladder top has a top panel having a perimeter. The perimeter has at least a first edge, a second edge, a third edge and a fourth edge. The ladder top also has a first side wall extending in an integral fashion from the first edge, a
5161909 Packaging clip November 10, 1992
A packaging clip for maintaining a first side rail of a ladder adjacent a second side rail of a ladder. The clip comprises a first portion for removably holding the first side rail and a second portion for removably holding the second side rail. The clip also is comprised of a support
5154255 Ladder shoe and method of use October 13, 1992
A ladder shoe for providing enhanced stability between a ladder and a variety of surfaces. The ladder shoe is comprised of a shoe body having a first side plate, a second side plate and a base. The first side plate and the second side plate are attached to the base. The side plates inclu
5131495 Hollow plastic ladder July 21, 1992
The present invention pertains to a plastic ladder. The plastic ladder includes a front section which has a first hollow side rail and a second hollow side rail disposed essentially in parallel with the first side rail. The first and second side rails are made of plastic and have rei
5067589 Extendable support November 26, 1991
A support having two support sections slidably engaged with each other includes a lock that can be used to releasably fix the size of the support surface defined by the support sections. The lock is mounted to one of the support sections and includes a shaft that can be received by any o
5067588 Ladder lash November 26, 1991
A system for holding a ladder in a secure position relative to an object against which the ladder rests. The system comprises a strap that contacts the ladder and the object and secures the ladder to the object. The system is also comprised of a first buckle and a second buckle, with eac
5050706 Ceiling ladder September 24, 1991
A foldable ladder having a plurality of sections which align during use to form a continuous ladder and which are foldable upon themselves for storage in a ceiling frame. The ladder includes hinges for connecting the sections. Each hinge has a first load bearing surface and second load
5020757 Ladder jack clamping devices June 4, 1991
A ladder jack supported by an inclined ladder and adapted to securely support a work platform comprising a horizontal support member fitted with a longitudinally adjustable clamping means to securely clamp the work platform in locking engagement with the ladder jack and prevent movement
4972571 Method of making a ladder November 27, 1990
Ladder constructions and methods of forming the same wherein box-type or tubular rails are employed. The rung-to-rail connection or joint is formed by providing an opening in one of the rail side walls and an aligned clearance hole in the opposite rail side wall to afford an opening thro
4656721 Apparatus and methods for making rail-to-rung joints for ladders and joints for other structural April 14, 1987
A rung-to-rail ladder joint connection for box section or tubular side rails comprising a rung, a malleable ferrule disposed on an end of the rung, the ferrule and rung projected through an opening in the web of each of the walls of the side rails, a sleeve or sleeve-like reinforcing mem
4561165 Method and apparatus for making hook to rail connection for scaffolds or the like December 31, 1985
A method and apparatus for making hook-to-rail connections for scaffolds or the like, namely a method of securing an offset hook to a rail or beam of generally I-shape by inserting an arcuate plate of such ductility as to be deformable upon extension thereof to fill spacing between the f
4422613 Picture frame easels December 27, 1983
An easel for use with a back-loading picture frame, which easel is readily attachable and detachable therefrom and intended for use primarily with picture frames formed from metal in extruded channel shapes. The easel preferably is of resilient extruded material and has a flat land membe
4286353 Multi-element connection for structural members September 1, 1981
A multi-element connection for structural members adapted to connect the structural members in co-linear arrangement and to automatically lock these members in such position, which connection is adapted to be rotated or folded to bring such structural members into such co-linear or lappe
4240522 Extension trestle ladder December 23, 1980
A device for automatically locking the fly assembly of an extension trestle ladder in an extended or lowered adjustment position. The fly assembly is supported to prevent downward movement by a displaceable member which abuts a rung on the fly assembly along a portion of the length of th
4226302 Sectional ladder lock October 7, 1980
There is disclosed herein a sectional ladder having at least a pair of ladder sections adapted to be slideably moved relative to the other for extension or retraction, one section carrying means adapted to engage a latch mounted on the other section for automatically locking the separate
4216597 Picture frame retaining clip August 12, 1980
A picture retaining clip for use at the corners and along the sides of a back-loading picture frame, which clip also may serve as a means for hanging the frame. The clip is a strip of resilient material with a central web and bent ends. When the clip is mounted at the corners of the

 
 
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