|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||60/413 ; 60/418 ; 91/5 ; 91/275|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 4 인용 특허 : 12|
A double-acting accelerated forging hammer and method of operation are disclosed. The hammer is of the type having a vertically oriented cylinder, a piston slidably mounted within the cylinder having a downwardly depending piston rod extending along the cylinder and attached to a hammer. A gas accumulator communicates with the cylinder above the piston for supplying gas under pressure thereto during a forging stroke, and a fluid accumulator communicating with the cylinder below the piston for supplying fluid thereto at a higher pressure than the gas to d...
A double-acting accelerated forging hammer in which a vertically movable hammer ram is mounted on a hammer frame, for imparting a predetermined and controlled amount of blow energy in said ram, comprising: a cylinder having a rod and piston therein defining a closed end above said piston and an annulus region between the cylinder and said piston rod, means connecting said rod to said ram, a source of hydraulic fluid, a high pressure hydraulic pump connected to draw hydraulic fluid from said source, a hydraulic accumulator connected to receive hydraulic f...