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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
---|---|
국제특허분류(IPC7판) |
|
출원번호 | US-0044922 (1979-06-04) |
발명자 / 주소 |
|
출원인 / 주소 |
|
인용정보 | 피인용 횟수 : 10 인용 특허 : 5 |
A device for locking a boom to a boom support structure as used in earthworking implements is described. A lug having a camming surface is provided on the boom or on the boom support structure as the case may be. The opposite structure is provided with a pivoted arm joined to a lock pin. Motion of t
In an earth-working implement having a boom pivoted on a boom support about a horizontal axis, a member pivoted about a horizontal axis on the free end of the boom, a hydraulic ram pivoted at one of its ends to the boom and at its opposite end pivoted to said member so that extension and retraction
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