公开(公告)号：US5655421A

公开(公告)日：1997-08-12

申请号：US533280

申请日：1995-09-25

Applicant: Chett D. Haupt

Inventor： Chett D. Haupt

IPC: B25B15/02 ,  B25B23/14 ,  B25B23/142 ,  B25B23/157

CPC classification number: B25B23/1427 ,  B25B15/02 ,  B25B23/141

Abstract: A micro-torque limiting production tool comprises a hollow cylindrically shaped handle in which a combination bit retainer clutch mechanism is supported. The combination bit retainer-clutch mechanism includes a pair of cylindrical clutch plates of a plastic composite composed of teflon fluorocarbon and acetal resin, having bulbous regions of diameter D1 in axially broad contact with each other within the central cavity of the handle to define a primary braking surface of area .pi.(D1/2).sup.2. Reduced regions of the clutch plates face in opposite directions, from a shoulder region to a remote end segment, the remote end segment of one of the reduced regions, extending through a secondary braking plate also of a plastic composite as described above, to define a secondary annular braking surface equal to .pi.[(D1-D2)/2].sup.2 (where D1 and D2 are exterior and interior diameters of such plate). Such primary and secondary braking surfaces are provided with a highly accurate, longitudinally acting composite friction force that establishes a set point value for such braking surfaces, above which such surfaces do not act as cohesive unit but separate into individual elements that are not permitted to cohesively rotate. Result: only a torque value at or below the set point level can be applied to an exterior fastener by the bit retainer-clutch mechanism of the invention.

Abstract translation: 微扭矩限制生产工具包括中空圆柱形手柄，其中支撑组合钻头保持器离合器机构。 组合钻头保持器 - 离合器机构包括一对由特氟隆氟碳化合物和缩醛树脂组成的塑料复合材料的圆柱形离合器板，其具有直径为D1的球形区域，在手柄的中心腔内彼此轴向宽接触，以限定主要 面积pi（D + E，fra 1/2 + EE）的制动表面2。 离合器片的减少区域从肩部区域到远端部分的相反方向面对，其中一个缩小区域的远端部分也延伸穿过如上所述的塑料复合材料的二次制动板，以限定一个 次级环形制动表面等于pi [（D1-D2）/ 2] 2（其中D1和D2是这种板的外部和内部直径）。 这样的主制动表面和次级制动表面设置有高度精确的纵向作用的复合摩擦力，其为这种制动表面建立设定值，在这些表面之上，这些表面不作为内聚单元，而是分离成不允许内聚的单个元件 旋转。 结果：通过本发明的钻头保持器 - 离合器机构，只能将设定值以下的转矩值施加到外部紧固件。

公开(公告)号：US6128984A

公开(公告)日：2000-10-10

申请号：US909460

申请日：1997-08-11

Applicant: Chett D. Haupt

Inventor： Chett D. Haupt

IPC: B25B15/02 ,  B25B23/14 ,  B25B23/142 ,  B25B23/157

CPC classification number: B25B15/02 ,  B25B23/141 ,  B25B23/1427

Abstract: A micro-torque limiting production tool and subassembly comprises a hollow cylindrically shaped housing in which a combination bit retainer clutch mechanism is supported. The combination bit retainer-clutch mechanism includes a pair of cylindrical drive and driven clutch disks of a plastic composite composed of teflon fluorocarbon and acetal resin, each having a bulbous region and a region supported front to back relative to each other to define a primary braking surface of area .pi.(D5/2).sup.2 where D5 is the diameter of the bulbous region.

Abstract translation: 微扭矩限制生产工具和子组件包括中空圆柱形壳体，其中支撑组合钻头保持器离合器机构。 组合钻头保持器 - 离合器机构包括由特氟隆氟碳化合物和缩醛树脂组成的塑料复合材料的一对圆柱形驱动和从动离合器盘，每个圆柱形驱动和从动离合盘具有球形区域和从前到后相对于彼此支撑的区域，以限定主制动 面积pi（D5 / 2）2的表面，其中D5是球根区域的直径。