Patent ID: 7287967
Filing Date: 2007-10-30
Classification: F02M

Abstract:
1. A high pressure pump characterized by: a plunger; an intermediate member having a cylinder for accommodating the plunger and a pressurizing chamber communicated with the cylinder and including a cylinder body for pressurizing fluid in the pressurizing chamber by reciprocating the plunger; two clamping members arranged on two sides of the intermediate member, wherein each of the two clamping members has elasticity; a first clamping bolt extending from a first of the two clamping members to a second of the two clamping members to clamp the intermediate member with the two clamping members, the second clamping member having a side facing the first clamping member where the first clamping bolt meets the second clamping member, and the pressure of the fluid pressurized by the plunger being applied to the second clamping member; a member for receiving reaction force from the pressurizing chamber when the fluid in the pressurizing chamber is pressurized, wherein the member for receiving the reaction force is attached to the second clamping member at a position for reducing the clamping force applied to the intermediate member by the clamping bolt and at a side of the second clamping member opposite to the side facing the first clamping member, wherein the member for receiving the reaction force includes a base plate; and a second clamping bolt for fastening the base plate to the second clamping member, wherein the first and second clamping bolts are located at positions that are different from each other in a direction perpendicular to a longitudinal direction of the plunger and close to each other when clamping, wherein the first clamping member is a flange-like member and the second clamping member has a body portion and a protrusion portion that is protruded from the body portion, and wherein the peripheral portion of the flange-like member and the protrusion portion receive the clamping force produced by the first clamping bolt.