Patent ID: 7124738
Filing Date: 2006-10-24
Classification: F02M,F04B

Abstract:
1. A damper mechanism which is provided at a low pressure-side passage leading to the pressure chamber of a pump for pressurizing fuel and reduces fuel pressure pulsation, wherein at least one set of metal diaphragm assembly each comprising two metal diaphragms welded together over the entire circumference is provided and gas is sealed therein, said diaphragm assembly is housed in a housing portion leading to said low pressure-side passage, the housing portion is sealed from the outside air with a lid, said damper mechanism further comprises a pair of retaining members which clamp the diaphragm assembly from above and below inside the weld of said metal diaphragms, and part of force which secures said lid on said housing portion is exerted on said diaphragm assembly through said retaining members and said diaphragm assembly is thereby secured in said housing portion.