Patent ID: 7255539
Filing Date: 2007-08-14
Classification: F04D

Abstract:
1. A throttle control mechanism for an engine driven pump, said pump having a fluid intake port and a fluid discharge port, said throttle control mechanism comprising: a) an elongate cylinder having a first open end and a second closed end, said first end closed and fluidly sealed by an end block, b) a fluid chamber within said end block, said fluid chamber in fluid communication with said cylinder, c) a sliding piston within said cylinder, said piston including an axially extending throttle activation rod extending through said end block, said throttle activation rod connected to the throttle of said engine whereby movement of said piston, within said cylinder, causes movement of said throttle activation rod and said engine throttle, d) sealing means between said piston and said cylinder, e) biasing means between said piston and said closed end of said cylinder whereby said piston is biased against said end block, f) a first fluid communicating conduit between said fluid chamber, within said end block, and the discharge port of said pump, g) said first fluid communicating conduit having a pressure relief valve therein whereby fluid will flow from said pump discharge port to said fluid chamber within said end block, when the fluid pressure within said pump discharge port exceeds a predetermined pressure, h) a second fluid communicating conduit fluidly communicating with said first fluid communicating conduit between said relief valve and said fluid chamber within said end block, said second fluid communicating conduit fluidly communicating between said first fluid communicating conduit and the atmosphere, i) a fluid restricting orifice within said second fluid communicating conduit whereby said orifice creates a reduced fluid pressure within said first and second fluid communicating conduits and said fluid chamber, within said end block, as fluid passes therethrough.