The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 23, 2006
Filed:
Apr. 12, 2005
Takayuki Okunishi, Hiroshima, JP;
Shintaro Sakitani, Hiroshima, JP;
Takayuki Okunishi, Hiroshima, JP;
Shintaro Sakitani, Hiroshima, JP;
Kobelco Construction Machinery Co., Ltd., Hiroshima, JP;
Abstract
In an excavator, a blade surface for performing an earth removal operation while a blade is set in contact with the ground satisfies the following conditions: A) upward pushing force components Fu that push dirt upward along the blade surface are generated; B) an upper part of the blade surface has a release surface portion in which a forward-upward release force that rolls the dirt pushed upward by Fu forward is generated; C) when downward pressing force components Fd are generated in response to the generated release force, a total downward pressing force ΣFd> a total upward pushing force ΣFu; and D) if each Fu is given a positive value and if each Fd and a reduced amount of each Fu caused when the dirt hits the release surface portion are given negative values, a value of force at an endmost section of the release surface portion is positive.