Device for controlling the height of a swivel chair
August 5, 2018. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 430648 D32360 3847456 Variable-throttle valve Resilient column of adjustable length Seat support column Lockable elevating mechanism for the continuous adjustment of furniture and guide sleeve for such an elevating mechanism Downhole motor and bearing assembly Column unit Longitudinally adjustable gas spring and elevating mechanism with such gas spring InventorsApplicationNo. 129093 filed on 08/05/1998US Classes:248/161, Adjustable vertically188/300, With means for locking parts together temporarily248/622, Resilient vertical standard384/609, Ball bearing384/620Resilient feature; adjustment or self-alignment means; assembling meansExaminersPrimary: King, Anita M.Attorney, Agent or FirmInternational ClassF16M 011/00Foreign Application Priority Data1997-08-23 KRAbstractThe present invention relates to a height-controlling device of a swivel chair. An objective of this invention is to prevent the detachment of components which are fitted to the end of a piston rod of a cylinder, resulting in the improvement of work conditions.The height-controlling device of the present invention is comprised of an elastic body 620, bearing supports 42 and 44, and a ball bearing 50 which are fitted to the end of a piston rod 610 of a cylinder 12; and a retaining washer 1 which is fixed to the piston rod and prevents the detachment of the elastic body, the bearing supports and the ball bearing component from the piston rod.Alternatively, the height-controlling device of the present invention is comprised of an elastic body 620 and a bearing support 42 which are fitted to the end of a piston rod 610 of a cylinder 12; and a thrust bearing 500 which is fixed to the piston rod and functions as both the bearing support 44 and the ball bearing component 50. In order to prevent the detachment of the elastic body, the bearing support and the thrust bearing, the thrust bearing 500 includes extending portions 7 on the inner circumference thereof. The thrust bearing is fixed to the piston rod by the extending portions.Field of SearchAdjustable verticallyAdjustable vertically Including additional energy absorbing means, e.g., fluid or friction damping, etc. Variable or adjustable energy absorbing means Solid friction members Linear motion Including load sustaining bearing or guide Resiliently supported leg or standard For movement along a linear axis Elastomeric Resilient vertical standard Fluid spring INCLUDING ENERGY ABSORBING MEANS, E.G., FLUID OR FRICTION DAMPING WASHER STRUCTURE Washer having a deformable portion engageable with a threaded element Washer adjacent head and having a particular shape (e.g., dished) or composition Resiliently deformable portion Elastic gripping action Including means for retaining washer to fastener Thrust bearing Plural rows balls or tandem thrust Ball bearing Race structure Assembling means Resilient feature; adjustment or self-alignment means; assembling means With means for locking parts together temporarily | |
