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|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||188/282 ; 16/51 ; 188/32215|
|발명자 / 주소||
|출원인 / 주소||
|인용정보||피인용 횟수 : 31 인용 특허 : 2|
A gas spring for a hatch type door is disclosed, which comprises a cylinder, a piston received in the cylinder to divide the same into first and second chambers, a piston rod connected to the piston, a first device for providing a passage between the first and second chambers only when the piston moves in a direction to contract the second chamber, a second device for providing a passage between these chambers only when the piston rod is pushed against the piston by a force greater than a predetermined degree, and a third device for providing a passage b...
A gas spring comprising: a cylinder; a free piston axially slidably and sealingly received in said cylinder to divide the interior of said cylinder into a gas chamber and a working liquid chamber; a piston axially slidably received in said working liquid chamber to divide the same into first and second working liquid chamber sections, the first section being located in the vicinity of said gas chamber; a piston rod connected at its one end to said piston and extending therefrom through said second working liquid chamber section to project axially outward...