초록 ▼

A handlebar stem assembly is provided for securing the handlebars to the frame of a motocross bicycle consisting of top and bottom plates formed with arcuate grooves to receive and secure the handlebars therebetween. The bottom plate is welded to a stem which attaches to the bicycle frame, and at le

A handlebar stem assembly is provided for securing the handlebars to the frame of a motocross bicycle consisting of top and bottom plates formed with arcuate grooves to receive and secure the handlebars therebetween. The bottom plate is welded to a stem which attaches to the bicycle frame, and at least one generally arcuate shaped relief opening is formed in the bottom plate adjacent its welded connection to the stem for reducing the stress concentration at such connection.

대표청구항 ▼

A handlebar stem assembly for securing the handlebar of a bicycle to the frame thereof comprising a top plate and a bottom plate each formed to receive said handlebar, said top and bottom plates each having a top surface and a bottom surface, means for connecting said top and bottom plates together,

A handlebar stem assembly for securing the handlebar of a bicycle to the frame thereof comprising a top plate and a bottom plate each formed to receive said handlebar, said top and bottom plates each having a top surface and a bottom surface, means for connecting said top and bottom plates together, stem means connected by a welded connection at one end to said bottom plate and adapted to be connected at the other end to said bicycle frame, means for reducing stress concentration in said bottom plate, said stress concentration reducing means comprising an aperture formed in said bottom plate adjacent said welded connection with said stem means, said handlebar being adapted to be secured between said plates on one side of said bottom plate offset from said welded connection, said one side of said bottom plate having a side edge extending between said top and bottom surface of said bottom plate, and said aperture being located between said welded connection and said side edge on said one side of said bottom plate and being spaced from said side edge.