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Patent Searching and Data


Title:
FAIL-SAFE DEVICE FOR QUICK COUPLER
Document Type and Number:
WIPO Patent Application WO/2018/034362
Kind Code:
A1
Abstract:
The present invention relates to a fail-safe device for a quick coupler, which, in a coupling process of a quick coupler for connecting a heavy equipment attachment and an excavator, automatically prevents unintentional separation between an attachment pin and a fixed hook, and enables a locking device to be automatically operated in association with a cylinder operation for slidably moving a hitch and elastic force of first and second compression springs. The fail-safe device for a quick coupler according to the present invention comprises: a quick coupler body mounted to an end of an excavator arm and a push link; a fixed hook disposed on one side of the quick coupler body and coupled to a first attachment pin; a hitch disposed on the other side of the quick coupler body and engaged with or disengaged from a second attachment pin according to an operation of a hydraulic cylinder; and a locking means which is operated in association with a cylinder operation for operating the hitch, and prevents unintentional release of a coupling state between the fixed hook and the first attachment pin by compressive elastic force of first and second compression springs.

Inventors:
JO, Young Hum (#111-2901, 85 Paldeung-ro,Nam-gu, Ulsan, 44682, KR)
Application Number:
KR2016/009084
Publication Date:
February 22, 2018
Filing Date:
August 18, 2016
Export Citation:
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Assignee:
DAEMO ENGINEERING CO., LTD. (15 Gunjacheon-ro, Siheung-si, Gyeonggi-do, 15102, KR)
International Classes:
E02F3/36; E02F9/24
Attorney, Agent or Firm:
IPS PATENT FIRM (5th Fl, 14 Banpo-daero 23gil,Seocho-gu, Seoul, 06656, KR)
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