A pneumatic system (10) is shown in its most preferred use in a spray gun (12) to remotely control a pressure washer. The system (10) generally includes an integrally formed, homogeneous squeeze box (40) including a location ear (52), a nose tube (46), a bellows (44) and a discharge tube (48). Bellows...http://www.google.es/patents/US4824340?utm_source=gb-gplus-sharePatente US4824340 - Bellows pneumatic system
