Abstract: A process for building recumbent bicycles to fit their riders. The first step is to build an adjustable recumbent bicycle frame designed for adjustability in the location of all the major elements of the bicycle; including position and angle of seat, position of wheels and pedals or other foot power means, position and caster angle of steering axis and position of handlebars or other steering means. Then individual riders or classes of riders test the adjustable frame model, and work out configurations that fit their body build and style of riding. Finally, lighter weight less adjustable or non-adjustable bicycle frames are built, copying the measurements between the elements of the adjustable frame bicycle, as configured when tested. One unique aspect of the present invention is that the adjustable frame utilized provides for both vertical and longitudinal adjustment between the bicycle seat and the rear wheel. Thus this parameter can be ergonomically optimized.

Abstract: A recumbent bicycle designed to be flexible in its geometry, adjustable in wheel base, position of seat, position and angle of front fork steering head tube mechanism, lead of front wheel bearing position on front fork, and/or position of foot pedal crank mechanism, allowing ergometric optimization for riding ease, comfort, stability, safety, etc.The unique aspect of the present invention is that the relationship between the bicycle seat and the rear wheel can be ergonomically optimized, and then the positioning of other elements can be optimized for the individual rider without altering the rear wheel to rider relationship.

Abstract: The present invention comprises a vacuum cup having a concave undersurface on which is mounted a doppler flow transducer. A vacuum tube is in communication with the undersurface of the cup and is capable of removing the air from beneath the suction cup so as to permit the suction cup to be clamped over an artery or other vessel. The device is used by activating the transducer to cause it to transmit a sound signal into the artery. The secondary or echo sounds created by this sound signal are sensed by the transducer and the transducer converts these secondary sound signals into electrical signals which are transmitted to means for analyzing the signals so as to determine the velocity of fluid flow within the vessel.