Roda livre e piston pump: o que têm em comum

1. Passo 1. Roda livre — utiliza — Torque. It transmits torque in one direction only.
2. Passo 2. Torque — é utilizado em — Rack and pinion. The rotation of the pinion becomes the travel of the rack.
3. Passo 3. Rack and pinion — faz parte de — Bomba de ar de Boyle. A rack and pinion moves the piston.
4. Passo 4. Bomba de ar de Boyle — evoluiu de — Vacuum pump. An improved version of Guericke’s pump.
5. Passo 5. Vacuum pump — evoluiu de — Piston pump. Guericke adapted the piston pump to pump out air.

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