Ceiling ladder

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 5050706
SERIAL NO

07565813

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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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 bearing surface which contact each other for support a load when the ladder is extended. The ladder also includes an improved counter balance assembly which connects the ladder to the ceiling frame; and a continuous hinge which connects the ladder to the ceiling frame in a manner which eliminates air from passing between the hinge and the ceiling frame.

First Claim

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Patent Owner(s)

Patent OwnerAddress
WERNER TECHNOLOGIES INC1105 NORTH MARKET STREET SUITE 1300 WILMINGTON DE 19899

International Classification(s)

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  • 1990 Application Filing Year
  • E04F Class
  • 60 Applications Filed
  • 0 Patents Issued To-Date
  • 0 % Issued To-Date
Click to zoom InYear of Issuance% of Matters IssuedCumulative IssuancesYearly Issuances19900255075100

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Cole, Paul E Burghill, OH 8 111
Guy, Barry L Poland, OH 1 17
Wasser, Jay S Greenville, PA 1 17

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Patent Citation Ranking

  • 17 Citation Count
  • E04F Class
  • 0 % this patent is cited more than
  • 34 Age
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