Input apparatus

An input apparatus comprising:

• a control section,
• a body formed with a pump passage and an output port,
• push rods arranged in said body and operatively connected to said control section,
• elastic means arranged in said body and operatively connected to each of said push rods,
• a shuttle arranged in said body and operatively connected to an individual one of said push rods,
• said shuttle having a pressure receiving surface and being formed with a passage,
• pressing operation of said control section causing said shuttle to be moved through said individual one of said push rods in a one direction against said elastic means to communicate said shuttle passage with said pump passage of said body, resulting in feeding hydraulic oil from a hydraulic pump through said shuttle to said output port of said body and balancing a back pressure acting on said pressure receiving surface of said shuttle through said output port with elastic force of said elastic means to determine a position of said shuttle and a hydraulic pressure output through said output port depending on the amount of operation of said control section, and
• said body including a pilot section having a hydraulic signal passage communicating with said shuttle pressure receiving surface through which an external hydraulic signal can be fed to exert a force on said shuttle pressure receiving surface to move said shuttle in a second direction opposing said one direction against said elastic means and therewith provide a control of a hydraulic pressure output through said output port counteractive to that otherwise determined by a position of said individual one of said push rods.