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|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||303/10 ; 188/181R ; 188/344 ; 188/345|
|우선권정보||JP-0064539 (1980-05-15); JP-0064538 (1980-05-15); JP-0133314 (1980-09-25)|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 18 인용 특허 : 2|
A hydraulic pump with an unloading function which comprises a pump body, a spring chamber formed in the pump body and communicating with a fluid reservoir, a pump chamber formed in the pump body and communicating with the spring chamber and an accumulator through a suction valve and a delivery valve, respectively. An operation chamber is also formed in the pump body and accommodates a drive member such as a pump drive shaft. A plunger slidably extending through a first partition between the spring chamber and the pump chamber, and a tappet having a small...
A hydraulic pump comprising a pump body including first and second partitions dividing said pump body into a spring chamber, a pump chamber and an operation chamber, said first partition being between said spring chamber and said pump chamber, said second partition being between said pump chamber and operation chamber, said spring chamber having a fluid inlet, suction valve means connecting said pump chamber and spring chamber for providing communication therebetween when said pump chamber is at a reduced pressure, delivery valve means connected to said ...