4. Supports
  5. Stand
  6. Standard type

Dong Kwan Ma

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Device for controlling the height of a swivel chair

Supports – Stand – Standard type
Reexamination Certificate

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Gas cylinder

Motors: expansible chamber type – With motive fluid valve – Independent control of bypass between opposed working chambers
Reexamination Certificate

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Gas spring device

Brakes – Internal-resistance motion retarder – Having a thrust member with a variable volume chamber
Reexamination Certificate

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Spindle for a height regulating device

Chairs and seats – Movable bottom – Bottom and back movable as a unit
Reexamination Certificate

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Tube guide for a column unit

Supports – Resilient support – Including spring zone understructure
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2478495

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