公开(公告)号：US06343891B1

公开(公告)日：2002-02-05

申请号：US09177728

申请日：1998-10-23

Applicant: Trevor L. Combs

Inventor： Trevor L. Combs

IPC: E04G700

CPC classification number: F16B2/10 ,  B62K21/12 ,  F16B2/065 ,  F16B7/0493 ,  Y10T74/2078 ,  Y10T403/7105 ,  Y10T403/7141

Abstract: A twisted bicycle stem includes first and second substantially identical helically twisted clamping members fastened together using four threaded fasteners received in four corresponding threaded apertures. The assembled twisted stem defines a vertical cylindrical receiving aperture and an opposing substantially horizontal cylindrical receiving aperture having a central axis offset by 90° with respect to the central axis of vertical receiving aperture. The two helically twisted clamping members each comprise one-half of the finished stem structure for receiving the substantially horizontal handlebar and the substantially vertical steerer tube. First and second helically twisted clamping members are preferably manufactured of an engineering plastic, preferably reinforced with a 50% glass fiber fill or carbon fiber fill using high tensile strength filaments. Each of the helically twisted clamping members preferably includes a twisted longitudinal external scoop or groove and functions as a twisted I-beam, thereby saving material and weight and providing a shape which permits the helically twisted clamping members to be molded in plastic and removed from the mold. A plurality of identical helically twisted clamping members are preferably fabricated in a single mold and two members are used to fabricate a twisted bicycle stem. The transverse extent of the scoop is bounded by first and second opposing ribs, also helically twisted in a 90° turn or quarter twist. In an alternative embodiment, the helically twisted clamping members are machined from titanium, aluminum, steel or the like.

Abstract translation: 扭转的自行车杆包括第一和第二基本相同的螺旋形扭转的夹紧构件，其使用四个螺纹紧固件紧固在一起，该螺纹紧固件被接收在四个对应的螺纹 组装的扭转杆限定垂直圆柱形接收孔和相对的基本水平的圆柱形接收孔，其具有相对于垂直接收孔的中心轴线偏移90°的中心轴。 两个螺旋扭转的夹紧构件各自包括成品杆结构的一半，用于接纳基本上水平的车把和基本垂直的转向管。 第一和第二螺旋扭转的夹紧构件优选地由工程塑料制成，优选用50％的玻璃纤维填充物或使用高拉伸强度的细丝的碳纤维填充物来增强。 每个螺旋形扭曲的夹紧构件优选地包括扭曲的纵向外部勺子或沟槽并且用作扭曲的I型梁，从而节省材料和重量并提供允许螺旋形扭曲的夹紧构件被模制成塑料并从其中移除的形状 模子。 多个相同的螺旋扭转的夹持构件优选地在单个模具中制造，并且两个构件用于制造扭曲的自行车杆。 铲斗的横向范围由第一和第二相对的肋条限定，也以90°转弯或四分之一扭转螺旋扭转。 在替代实施例中，螺旋扭转的夹持构件由钛，铝，钢等加工。

公开(公告)号：USD340972S

公开(公告)日：1993-11-02

申请号：US546796

申请日：1990-07-02

Applicant: Lawrence Johnson, III ,  Trevor L. Combs

Designer： Lawrence Johnson, III ,  Trevor L. Combs