Tilt control mechanism for a chair
First Claim
1. A control mechanism for a chair comprising first and second chair components which are movably interconnected so as to be movable relative to each other, said control mechanism including a stop mechanism mounted on said first chair component and a stop part on said second chair component which is engagable with said stop mechanism to selectively confine movement of said second chair component relative to said first chair component and thereby limit movement of said first and second chair components, said stop mechanism including a slide member which is slidable along first chair component and includes a respective engagement section engaged with said stop part such that relative movement of said first and second chair components effects sliding movement of said slide member in a slide direction, said stop mechanism further including a lock mechanism which is releasably engagable with said slide member to releasably prevent movement of said slide member and releasably confine movement of said second chair component relative to said first chair component, said lock member including a lock member which is engagable with said slide member in a locking direction transverse to said slide direction wherein said slide member and said lock member are movable one relative to the other between a locked position which prevents said sliding movement of said slide member and an unlocked position wherein said sliding movement of said slide member is permitted, said lock member including a manual actuator effecting said movement between said locked and unlocked positions.
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0 Petitions
Accused Products
Abstract
A tilt control mechanism for an office chair includes a spring assembly therein which controls the tilt tension on the back assembly. The tilt control mechanism includes a control plate mounted to the control shaft on which the uprights are mounted, wherein the control plate rotates in combination with the uprights. This control plate is located within the control body and cooperates with a front stop assembly and a back stop assembly to vary the limits of forward and rearward tilting of the seat and back assemblies. Also, the tilt control mechanism includes a pneumatic actuator assembly having fixed and rotatable cam blocks. The rotatable cam block rotates relative to the fixed block such that the rotatable cam block is driven downwardly to depress the control valve of the pneumatic cylinder and thereby vary the height of the seat assembly.
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Citations
27 Claims
- 1. A control mechanism for a chair comprising first and second chair components which are movably interconnected so as to be movable relative to each other, said control mechanism including a stop mechanism mounted on said first chair component and a stop part on said second chair component which is engagable with said stop mechanism to selectively confine movement of said second chair component relative to said first chair component and thereby limit movement of said first and second chair components, said stop mechanism including a slide member which is slidable along first chair component and includes a respective engagement section engaged with said stop part such that relative movement of said first and second chair components effects sliding movement of said slide member in a slide direction, said stop mechanism further including a lock mechanism which is releasably engagable with said slide member to releasably prevent movement of said slide member and releasably confine movement of said second chair component relative to said first chair component, said lock member including a lock member which is engagable with said slide member in a locking direction transverse to said slide direction wherein said slide member and said lock member are movable one relative to the other between a locked position which prevents said sliding movement of said slide member and an unlocked position wherein said sliding movement of said slide member is permitted, said lock member including a manual actuator effecting said movement between said locked and unlocked positions.
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12. A clustered handle assembly for a chair, said chair having a multi-function control mechanism comprising first, second and third mechanisms, said handle assembly comprising:
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a mounting body having an elongate guide shaft which defines a rotation axis extending axially therethrough, and first and second rotatable handles rotatably supported on an exterior surface of said guide shaft, said first rotatable handle being connected to said first mechanism and said second rotatable handle connected to said second mechanism, said guide shaft further including a bore extending coaxially therethrough wherein a third rotatable handle is disposed with a shaft thereof extending interiorly through said bore for rotation about said rotation axis, said third handle being connected to said third mechanism; said first and second handles respectively including circumferential first and second cam arrangements thereon which are each engaged by resiliently movable first and second biasing members, said first and second biasing members respectively cooperating with said first and second cam arrangements such that each of said first and second handles snap over center between first and second operative positions corresponding to plural operative conditions of said first and second mechanisms, said first cam arrangement being defined on said first rotatable handle, and said second cam arrangement being defined on said second rotatable handle. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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20. A clustered handle assembly for a chair, said chair having a multi-function control mechanism comprising first, second and third mechanisms, said handle assembly comprising:
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a mounting body having an elongate guide shaft which defines a rotation axis extending axially therethrough, and first and second rotatable handles rotatably supported on an exterior surface of said guide shaft, said first rotatable handle being connected to said first mechanism and said second rotatable handle connected to said second mechanism, said guide shaft further including a bore extending coaxially therethrough wherein a third rotatable handle is disposed with a shaft thereof extending interiorly through said bore for rotation about said rotation axis, said third handle being connected to said third mechanism; said first rotatable handle being rotatably supported for rotation about said exterior of said guide shaft, and said second rotatable handle being rotatably supported for rotation about an exterior of said first rotatable handle, said third rotatable handle being provided for reversible driving rotation of said shaft through multiple turns of said shaft. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27)
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Specification