Collapsible bicycle

A collapsible wheeled vehicle comprising,

• a bottom bracket,
• a head tube interconnected with the bottom bracket,
• a fork carrying a front wheel and mounted on the head tube,
• a seat tube pivotally mounted on the bottom bracket and pivotable from an erect first position wherein the center lines of the head tube, fork and seat tube are coplanar in a first plane to a collapsed position wherein the seat tube extends toward the head tube at an angle to the first plane,
• a chain stay pivotally mounted on the bottom bracket and carrying a rear wheel,
• said chain stay being pivotable from a first erect position wherein the rear wheel lies rearwardly of the bottom bracket and in said first plane to a collapsed position wherein the wheel lies forward of the bottom bracket and is displaced from the first plane to a second plane beside the front wheel,
• and cable means for releasably retaining the seat tube and chain stay in an erect position.

A collapsible wheeled vehicle comprising

• a frame having a head tube and bottom bracket interconnected by a down tube,
• a seat tube and a chain stay pivotally mounted on the bottom bracket,
• and a strut pivotally mounted on the bottom bracket,
• a first cable connected between the head tube
• and chain stay and joining the seat tube intermediate the ends of the first cable,
• and a second cable connected between the head tube and chain stay and joined to the strut intermediate the ends of the second cable,
• each of said cables comprising a pair of coextensive halves disposed on opposite sides of the frame.

A wheeled vehicle comprising:

• a head tube and a down tube connected together,
• a bottom bracket assembly connected to the down tube,
• a seat tube having its lower end mounted on the bottom bracket assembly,
• a chain stay having its forward end mounted on the bottom bracket assembly,
• and means including a cable assembly interconnecting the upper portion of the seat tube, the forward portion of the head tube and the rear portion of the chain stay.

A head tube and handle bar assembly for wheeled vehicles comprising:

• a head tube having a fork and stem mounted thereon,
• a bracket interconnected to the stem,
• a handle bar post pivotally connected at one end to the bracket and carrying a handle bar at the other end,
• and locking means including a tube generally parallel to and exterior of the head tube, interconnected to the post and releasably engaging the fork at a point remote from the bracket for releasably locking the post in the erect position.

A handle bar assembly for use on a wheeled vehicle having a head tube and a fork and stem mounted on the head tube for carrying the front wheel comprising:

• a handle bar post and a bracket pivotally mounting the post at its lower end on the fork, and movable between an erect position wherein it extends upwardly from the bracket and a collapsed position wherein it extends generally horizontally from the bracket,
• and a clamp assembly connected to the post and releasably locking onto the stem to hold the post in the erect position,
• said clamping assembly comprising a cable connected to the handle bar post and carrying a toggle handle,
• and a yoke mounted on the stem and having a groove to engage the toggle whereby the post is held erect when the toggle engages the groove.

In a wheeled vehicle frame having a down tube and a bracket mounted thereon,

• a seat post assembly comprising:
• a lower post section pivotally mounted at its lower end on the bracket about a horizontal axis permitting said lower section to move from an erect position extending upwardly from the bracket to a collapsed position wherein it lies generally parallel to the down tube,
• an upper post section pivotally mounted at its lower end on the lower post section above the bracket and pivotable about a horizontal axis permitting said upper section to fold down upon the lower section and lie along the down tube,
• and locking means for immobilizing the pivotal connection between the lower and upper post sections.

A wheeled vehicle frame comprising:

• a main frame member,
• a seat tube pivotally connected to the main frame member,
• a cable interconnecting the main frame member and the upper portion of the seat tube.
• and a hinge interrupting the seat tube between the cable and the main frame member enabling the seat tube to move between an erect position wherein the seat tube is straight and held erect by the cable and a collapsed position wherein the tube is straight and lies along the main frame member,
• said hinge enabling the tube to fold as it collapses to relieve tension on the cable and passing over center to rigidify the post when the tube is erected.