Bicycle shifter boss assembly

• US 4,684,281 A
• Filed: 08/26/1985
• Issued: 08/04/1987
• Est. Priority Date: 08/26/1985
• Status: Expired due to Fees

• Current Assignee: Cannondale Bicycle Corporation (Dorel Industries Incorporated)
• Original Assignee: Cannondale Bicycle Corporation (Dorel Industries Incorporated)
• Inventors: Patterson, Thomas C.
• Primary Examiner(s): Husar, Cornelius J.
• Assistant Examiner(s): Cuomo, Peter M.
• Application Number:
  US06/769,577
• Time in Patent Office: 708 Days
• Field of Search: 403/200, 403/197, 403/191, 403/237, 403/234, 280/236, 74/475, 74/491, 74/489, 474/82, 411/19, 411/20, 411/122-124, 411/129-131, 411/93-96
• US Class Current: 403/197
• CPC Class Codes: B62K 19/30 Frame parts shaped to receive other cycle parts or accessories axle suspensions B62K25/00
• CPC Class Codes: B62M 25/04 hand actuated
• CPC Class Codes: F16B 2/12 using sliding jaws
• CPC Class Codes: Y10T 74/20287 Flexible control element
• CPC Class Codes: Y10T 74/20612 Hand

Abstract

A shifter boss mounting assembly includes a member threaded at each end and extending diametrically at least partway through a bicycle frame downtube formed with openings therein, a pair of shifter boss bases with inward surfaces conforming to the downtube outer surface, and a pair of shifter studs that extend through the base and a respective opening in the downtube and thread onto the corresponding threaded ends of the member. A projection on each base cooperates with an opening or indentation in the downtube to restrain the base from rotational movement. A lock washer or a plate keyed to cooperate with the base and the stud restrain the stud against unthreading when the shift levers are pivoted. Once mounted, the boss assembly is standardized in its external configuration to bosses adapted to receive standard commercial shift lever assemblies.

Claims

1. A shifter boss assembly for mounting at least one shift lever assembly on a tube of a bicycle frame comprising a member having threads at each end, the member being adapted to extend substantially diametrically at least partway through the tube with the threaded ends disposed adjacent openings in the tube, a mounting base adjacent one tube opening including an inner face having a shape complementary to and adapted to engage the outside surface of the tube adjacent the opening, an opening therethrough for alignment with the opening in the tube and for reception of the threaded rod end, base rotation inhibiting means formed on the inner face for inhibiting rotation of the base with respect to the tube, a shifter stud having a threaded portion at one end threaded onto the threads on one end of the member, a shoulder engaging the mounting base to clamp the mounting base against the tube, and an inward projection fitting through the opening in the base, the internally threaded hole of the stud opening inwardly to receive the threaded rod end and the inward projection on the stud terminating outwardly at the shoulder, an internally threaded opening at the other end of the stud opening outwardly away from the tube and located to receive an adjusting bolt of the shift lever assembly, stud rotation inhibiting means interacting between the base and the stud including a locking plate fitting over the stud in a keyed relation to a surface thereof for preventing relative rotation between the stud and the plate, interfitting keying means on the base and the plate for preventing relative rotation between the base and the plate, whereby the plate, base and stud are interlocked against relative rotational movement, and means associated with the threads on the other end of the member and with the tube for securing said other end of the member to the tube.

2. The shifter boss assembly according to claim 1 wherein the member extends entirely through the tube, each end projecting through an opening in the tube.

3. The shifter boss assembly according to claim 1 wherein the member is a rod having external threads at each end, wherein the rod extends entirely through the tube and the ends project through the tube openings and the said threaded portion of the stud is internally threaded.

4. The shifter boss assembly according to claim 1 wherein the base rotation inhibiting means comprises a projection on the inner surface of the base adapted to be received in a recess in the tube.