Foldable stroller

Abstract

A foldable stroller comprises a folding mechanism to assist in folding of the stroller. Such a folding mechanism may be used to convert a stroller from an in-use configuration to a storage configuration. More specifically, the stroller comprises a stroller folding assembly that biases the stroller from the in-use configuration to the storage configuration by the force of gravity exerted on the handle. The stroller folding assembly has linkages that drive folding of the front wheel assembly and rear wheel assembly in response to rotation of the handle into the storage configuration from the in-use configuration.

1 .- 19 . (canceled) 
     
     
         20 . A stroller, comprising:
 a handle assembly,
 a front wheel assembly; wherein the front wheel assembly comprises at least one front wheel; 
 a rear wheel assembly; wherein the rear wheel assembly comprises at least one rear wheel; 
 an articulated stroller seat comprising a seat backrest and a stroller seat rotatably connected at a stroller seat pivot axis; 
 a stroller pivot assembly, wherein the stroller pivot assembly rotatably connects the handle assembly, the front wheel assembly, rear wheel assembly, the front wheel assembly and the rear wheel assembly may rotate from an stroller in-use position to a stroller storage position; and 
 a folding pivot assembly, wherein the folding pivot assembly comprises a handle assembly linkage rotatably connected to the handle assembly, a front wheel assembly linkage, a rear wheel assembly linkage, and a stroller seat assembly linkage rotatably connected to the stroller seat pivot axis, wherein rotation of the handle assembly by the force of gravity drives the handle assembly linkage to rotate the front wheel linkage and the rear wheel linkage to rotate the front wheel assembly toward the rear wheel assembly. 
   
     
     
         21 . The stroller of claim  1 , wherein the handle assembly linkage is rotatably connected to the rear wheel assembly linkage and the rear wheel assembly and the rear wheel assemble linkage is pivotally connected to the rear wheel assembly. 
     
     
         22 . The stroller of  claim 21 , wherein the rear wheel assembly linkage is rotatably connected to front wheel assembly linkage. 
     
     
         23 . The stroller of  claim 22 , wherein the rear wheel assembly linkage has an L-shaped portion. 
     
     
         24 . The stroller of  claim 23 , wherein the rear wheel assembly linkage is an L-shaped linkage. 
     
     
         25 . The stroller of  claim 22 , wherein the stroller seat assembly linkage is rotatably connected to at least one of the front wheel assembly linkage and the rear wheel assembly linkage. 
     
     
         26 . The stroller of  claim 25 , wherein the stroller seat assembly linkage comprises an L-shaped portion. 
     
     
         26 . The stroller of  claim 20 , wherein the stroller is biased from the in-use position to the storage position by the force of gravity on the handle assembly. 
     
     
         27 . The stroller of  claim 26 , wherein the force of gravity is not assisted or enhanced by mechanical biasing force.