An automatic faucet apparatus comprises a drive control means wherein an intermediate drive section coupled to a motor as normally resiliently biased toward the original position is interlocked to a driving shaft coupled to a valve member with a play involved in the interlocking, so that, when the motor...http://www.google.es/patents/US4688277?utm_source=gb-gplus-sharePatente US4688277 - Automatic faucet apparatus
