RELIEF VALVE FOR HIGH-PRESSURE FUEL PUMP

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United States of America Patent

APP PUB NO 20130306033A1
SERIAL NO

13896867

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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A relief valve includes a valving element, a movable holder, a housing having a guide hole and a valve seat, and a resilient member. The valving element is lifted from its seated state, in which the valving element is engaged with the valve seat, toward a pressurizing chamber in a lift period. The lift period includes a lift first period and a lift second period. An amount of the lift of the valving element reaches a set distance in the lift first period. The lift second period is after the amount of the lift of the valving element has reached the set distance. The movable holder slides inside the guide hole both in the lift first period and in the lift second period. A minimum clearance area between the movable holder and the guide hole is larger in the lift second period than in the lift first period.

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Patent Owner(s)

Patent OwnerAddress
DENSO CORPORATION1-1 SHOWA-CHO KARIYA-CITY AICHI-PREF 448-8661
NIPPON SOKEN INC14 IWAYA SHIMOHASUMI-CHO NISHIO-CITY AICHI-PREF 445-0012

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kato, Takehiko Nukata-gun, JP 30 228
Miyamoto, Yutaka Takahama-city, JP 117 995
Nishiwaki, Toyoji Anjo-city, JP 13 86
Oguri, Tatsumi Okazaki-city, JP 13 135
Ohata, Koichi Kariya-city, JP 7 54
Tsuge, Shigeto Okazaki-city, JP 11 299

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