Abstract: A precision hair clipper for cutting the hair to a predetermined length, energized solely by a vacuum source. A flow chamber having an inlet and an outlet which connected to an inlet of a turbine. The stator of the turbine is the handle of the hair clipper. The outlet of the turbine is connected to a vacuum source through a hose. In the inlet opening of the flow chamber the sucked in hair is cut by a wobbling-reciprocating narrow, double edged blade under a stationary blade opening to provide a pair of scissors action. The cutting mechanism is driven by the turbine through a speed reduction transmission. The length of hair after a cut depends on a selected spacer, connected to the inlet of the flow chamber.

Abstract: In a two-stroke cycle internal combustion engine a noncompression type pump formed by placing a plate-like secondary piston within a primary piston, between the top and the wrist pin. The reciprocating movements of primary and secondary piston in conjunction with the intake port and transfer port, provide a pump with a longer intake time and less power need, relative to prior art.