Abstract: A pulse dampener for fuel systems having a rotary fuel pump and a fuel flow passage. The pulse dampener includes a hollow torus-shaped body with a fluid disposed within the body and the hollow body defining two flat surfaces disposed in spaced parallel relation with respect to one another and perpendicular to the flow of fuel through the fuel system. The pulse dampener further includes a pair of sides disposed perpendicular to and interconnecting the spaced flat surfaces to define the torus shaped pulse dampener to dampen pressure pulses within the fuel.

Abstract: A molding apparatus for making a hollow pressurized pulse dampener including a fixed platen having a primary member extending from the fixed platen and a secondary member including a centrally disposed aperture and a second mold surface to define a mold cavity for molding an intermediate member. The primary member extends through the centrally disposed aperture of the secondary member and includes a distal terminal end which includes a first mold surface for molding a pulse dampener. The first mold surface is disposed recessed within the secondary member such that the secondary member is moveable with respect to the primary member to present the first mold surface in the mold cavity to define the pulse dampener from the intermediate member. The secondary member includes means for continuously, positively and precisely pressurizing the mold cavity and the intermediate member until the first mold surface is presented within the cavity to mold the pulse dampener.