Patent ID: 8763636
Filing Date: 2014-07-01
Classification: F04B,Y10T

Abstract:
1. A valve assembly for use in a fuel pump comprising: a rigid body member with a valve aperture; a valve member movable within the body member and adapted to close the valve aperture; a biasing arrangement having a first part fixed with respect to one of the body member and the valve member and a second part fixed with respect to the other of the body member and the valve member, the biasing arrangement being adapted to bias the valve member to close the valve aperture; wherein the biasing arrangement comprises a helical spring with a first diameter at the first part and a second diameter at the second part, wherein the first diameter and the second diameter are different from each other, and wherein the helical spring is at the first part thereof retained by an interference fit against a constant diameter portion of the one of the body member and the valve member with respect to which it is fixed.