Cycle seat backrest

Claim 1

In a backrest for use with a saddle-like seat for a cycle, such as a bicycle or motorcycle, said seat having a top face of a shape upon which a rider may be seated with legs of the rider straddling the forward end thereof, said face being symmetrical with respect to its central longitudinal axis, said seat havinG a downwardly turned flange at opposite sides thereof, comprising: a. said backrest having a lower edge adapted to rest on said top face at a locus forwardly from the rear end of the seat and transverse to said longitudinal axis to provide a fulcrum; b. a pair of downwardly extending side hooks secured to a lower portion of the backrest, one at each side of said axis, each side hook adapted to engage beneath a corresponding flange at the sides of the seat and at a locus forwardly from said lower edge, whereby a rearward force on the backrest produces a moment about said fulcrum which is resisted by upward forces applied by said hooks to the flanges; and c. other means affixed to the backrest for securing it to the seat at a locus rearwardly of said fulcrum and so constructed to resist a moment about said fulcrum produced by a forward force applied to the backrest, said other means also preventing forward movement of the backrest relative to the seat; d. the position of said fulcrum being sufficiently near the rear end of the seat to permit the rider to be seated directly thereon in substantially the same position as in the absence of the backrest, whereby the seat serves its original purpose and the backrest serves its added purpose; e. said side hooks being spaced in such manner that they engage beneath the corresponding flanges when the backrest is slid forwardly onto the seat to the position where said lower edge forms said fulcrum.