Patent ID: 6427516
Filing Date: 2002-08-06
Classification: G01M,Y10T

Abstract:
A leak detector for use with a pump pumping product from a storage tank through said leak detector into a line having an outlet at a product dispenser, said leak detector comprising in combination;a) a poppet valve having a passageway and at least one cross-hole in fluid communication with said passageway; b) a metering pin cooperating with said poppet valve to meter flow through said at least one cross-hole into said passageway of said poppet valve as a function of the position of said poppet valve relative to said pin; c) a piston having an effective area less than the effective area of said poppet valve, said piston being axially translatable in response to return flow of product from the line to displace said poppet valve relative to said pin during flow of product into the line; and d) a spring for restraining displacement of said poppet valve in response to translation of said piston.