Abstract: An improved human-powered air pump allowing rapid low pressure and high pressure inflation has an expandable/collapsible first and second chamber featuring and airflow path via a one-way valve. Said first chamber features an air intake. Said one-way valve allows air to flow in a downstream direction. Said pump features an outlet configured to receive air from said second chamber and connectable to an inlet of an inflatable object to feed air thereto from said pump.

Abstract: An inflatable object has a curved section, and an improved valve featuring a flexible chute that has an inner edge connected to said inflatable object and is rollable and unrollable between a rolled-up closed position and an unrolled open position. The inner edge is connected to said inflatable object along said curved section at a location and orientation operable to use pressure inside said inflatable object to resist unrolling of said flexible chute from the rolled-up closed position, thereby imparting a self-locking functionality to the valve.