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    Height adjusting mechanism
    1.
    发明授权
    Height adjusting mechanism 有权
    高度调节机构

    公开(公告)号：US06422652B1

    公开(公告)日：2002-07-23

    申请号：US09726135

    申请日：2000-11-29

    Applicant: Richard N. Roslund, Jr. ,  Troy Roark

    Inventor： Richard N. Roslund, Jr. ,  Troy Roark

    IPC: B60N202

    CPC classification number: A47C7/402

    Abstract: A height adjusting mechanism is connected between a rigid upright extending upwardly from the seat assembly and an inner shell of the back assembly. The height adjusting mechanism includes a ratcheting latch which engages a vertically elongate rack to maintain the back assembly at a selected elevation and a release lever or cam which is connected to the catch and automatically disengages the catch from the rack at the upper limit of travel of the back assembly. The release cam continuously contacts the inner shell of the back assembly and is deactivated merely by a short upward shifting of the back assembly which thereby permits the pawl to reengage the rack at any desired elevation. Accordingly, reengagement of the pawl with the rack can be accomplished at any point between the upper and lower limits of travel of the back assembly.

    Abstract translation: 高度调节机构连接在从座椅组件向上延伸的刚性立柱和后组件的内壳之间。 高度调节机构包括棘轮闩锁，其接合垂直细长的齿条以将后组件保持在选定的高度;以及释放杆或凸轮，该释放杆或凸轮连接到所述卡扣并且在所述卡盘的行进上限处自动地从所述齿条脱离 后组装。 释放凸轮连续地接触后组件的内壳，并且仅通过后组件的短暂的向上移动来停用，从而允许棘爪以任何期望的高度重新接合齿条。 因此，可以在背部组件的行进的上限和下限之间的任何点处实现具有齿条的棘爪的重新接合。

    Tilt control for chair
    2.
    发明授权
    Tilt control for chair 有权
    倾斜控制椅子

    公开(公告)号：US06286900B1

    公开(公告)日：2001-09-11

    申请号：US09434431

    申请日：1999-11-04

    Applicant: Troy Roark

    Inventor： Troy Roark

    IPC: A47C760

    CPC classification number: A47C1/03255 ,  A47C1/03266 ,  A47C1/03272

    Abstract: A tilt control mechanism for an office chair includes a spring arrangement which permits forward and rearward tilting of the chair while also urging the chair to a normal upright position. The spring arrangement includes front and rear springs which act in combination such that the upward acting forces acting on the chair can be varied during use. The forces being applied by the front spring are adjusted by a side-actuated tension adjustment mechanism which incorporates a wedge block for adjusting the spring forces. Further, the rear springs provide a variable spring force such that the spring force is maximized when in the normal position but is decreased substantially once the chair is fully reclined. This reduction in spring force allows a user to maintain the chair in the fully reclined position with significantly less force than was required to tilt the chair rearwardly while a sufficient spring force continues to be applied by the front spring to urge the chair to the normal position.

    Abstract translation: 用于办公椅的倾斜控制机构包括弹簧装置，其允许椅子的前后倾斜，同时还将椅子推向正常的直立位置。 弹簧装置包括组合的前后弹簧，使得作用在椅子上的向上作用力可在使用期间变化。 由前弹簧施加的力由侧向致动的张力调节机构调节，该机构包括用于调节弹簧力的楔形块。 此外，后弹簧提供可变的弹簧力，使得当处于正常位置时弹簧力最大化，但是一旦椅子完全倾斜，则弹簧力被大大减小。 弹簧力的这种减小允许使用者将椅子保持在完全倾斜的位置，其力显着小于将椅子向后倾斜所需的力，同时由前弹簧继续施加足够的弹簧力以将椅子推到正常位置 。

    Tilt control for chair
    6.
    发明授权
    Tilt control for chair 有权

    公开(公告)号：US06361110B1

    公开(公告)日：2002-03-26

    申请号：US09746180

    申请日：2000-12-21

    Applicant: Richard N. Roslund, Jr. ,  Patrick Nelson ,  Larry Allen Wilkerson ,  Troy Roark ,  Joel Dral ,  Steve Simpson ,  John Clark

    Inventor： Richard N. Roslund, Jr. ,  Patrick Nelson ,  Larry Allen Wilkerson ,  Troy Roark ,  Joel Dral ,  Steve Simpson ,  John Clark

    IPC: A47C320

    Abstract: A tilt control mechanism for an office chair includes a spring arrangement which permits forward and rearward tilting of the chair while also urging the chair to a normal upright position. The spring arrangement includes front and rear springs which act in combination such that the upward acting forces acting on the chair can be varied during use. The forces being applied by the front spring are adjusted by a side-actuated tension adjustment mechanism which incorporates a wedge block for adjusting the spring forces. Further, the rear springs provide a variable spring force such that the spring force is maximized when in the normal position but is decreased substantially once the chair is fully reclined. This reduction in spring force allows a user to maintain the chair in the fully reclined position with significantly less force than was required to tilt the chair rearwardly while a sufficient spring force continues to be applied by the front spring to urge the chair to the normal position.

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