A bicycle frame set comprising a main frame and a rear wheel suspension system including a swing-arm, a first link member and an intermediate lower link member. The swing arm has a forward end pivotally connected to the main frame. The swing-arm pivots such that a rear wheel axle on the swing-arm pivots about the lower pivot point on the frame with a constant radius of rotation. The first link member is pivotally connected to the main frame at a link pivot point, and has a displaceable lower end pivotable about the link pivot point. The intermediate lower link member is pivotally connected between the first link member and the swing-arm. The first link member rotates in a direction opposite to the rotation of the swing-arm as the suspension system compresses. A shock absorber is disposed between the first link member and the main frame.
CROSS-REFERENCE TO RELATED APPLICATIONS
This is a continuation application of U.S. patent application Ser. No. 11/069,568 filed on Mar. 2, 2005, now U.S. Pat. No. 7,216,883 the entire contents of which is incorporated herein by reference.
USPTO Field of Search
280/284
280/275
280/283
Related Patents
7494146 - Bicycle frame - Owned by Merida Industry Co., Ltd. (Meikang Village, Tatsun Hsiang, Changhua Hsien,TW)
A bicycle frame has a front frame, a mounting bracket assembly, a rear frame and a shock absorbing device. The front frame has a head tube, a down tube, a top tube, a bottom bracket shell and a seat tube. The seat tube is connected to bottom bracket shell, is connected to the rear end of the top tube and has an upper bracket seat, a connecting bracket and a lower bracket seat. The mounting bracket assembly is connected pivotally to the front frame and has two front mounting brackets and a rear mounting bracket. The rear frame is connected pivotally to the mounting bracket assembly and the front frame and has an upper fork, a lower fork and two dropouts. The shock absorbing device is connected to the front frame, the rear frame and the mounting bracket assembly and has a first shock absorber and a second shock absorber.
