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US Patent 7140072 Lockable ladder hinge

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Patent Citations Received
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US Patent 12091916 Ladder hinge and ladders incorporating same
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edited on 22 May, 2024
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Patent Citations Received
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US Patent 11988043 Ladders, ladder hinges and related methods
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Patent Citations Received
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US Patent 11788351 Ladders, ladder components and related methods
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Patent Inventor Names
Lu Hao Leng0
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Patent abstract

A lockable hinge includes a first and second hinge member, a lock, and an actuator. The lockable hinge is coupled to a pair of ladder-leg sections and is arranged to allow the ladder-leg sections to move among closed-ladder, trestle-ladder, and straight-ladder positions. The lock is used to lock the hinge members to cause the ladder-leg sections to lock in the closed-ladder, trestle-ladder and straight-ladder positions.

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Official Website
https://pdfpiw.uspto.gov/.piw?Docid=071400720
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US Patent 07140072 Lockable ladder hinge US Patent 7140072 Lockable ladder hinge

Infobox
Patent Number
071400720
Patent Number
71400720
Edits on 3 Apr, 2023
"Entity importer update"
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edited on 3 Apr, 2023
Infobox
Is a
Patent
Patent
0
Patent Jurisdiction
United States Patent and Trademark Office
United States Patent and Trademark Office
0
Patent Number
071400720
Date of Patent
November 28, 2006
0
Patent Application Number
109858180
Date Filed
November 10, 2004
0
Official Website
https://pdfpiw.uspto.gov/.piw?Docid=071400720
Patent Primary Examiner
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Chuck Y Mah
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Edits on 8 Jun, 2022
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edited on 8 Jun, 2022
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Website URL
https://pdfpiw.uspto.gov/.piw?Docid=07140072
Edits on 19 Nov, 2021
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created this topic on 19 Nov, 2021
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 US Patent 07140072 Lockable ladder hinge

Infobox
Is a
Patent
Patent
Patent jurisdiction
United States Patent and Trademark Office
United States Patent and Trademark Office
Patent number
07140072
Date of patent
November 28, 2006
Patent application number
10985818
Date Filed
November 10, 2004
Patent primary examiner
‌
Chuck Y Mah

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