US Patent 11751691 Seat connecting device with adjustable backrest
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US Patent 11751691 Seat connecting device with adjustable backrest
Article
Embodiments provide a seat connecting device with an adjustable backrest, belonging to the technical field of swivel chairs. In the embodiments, the seat connecting device includes a seat back tightness control assembly including a control handle, a universal joint, a transmission rod, a first bevel gear, a second bevel gear, a lifting part, a mounting seat of the lifting part, and a tightness adjust rod.
Infobox
Is a
Patent Jurisdiction
Patent Number
11751691
Patent Inventor Names
Bin Zheng
Chiachi Shu
Kun Yang
Wenyuan Pan
Zhenlin Meng
Date of Patent
September 12, 2023
Patent Application Number
17623044
Date Filed
June 12, 2020
Patent Citations
Patent Primary Examiner
CPC Code
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