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Title:
DUSTPROOF STRUCTURE FOR MOVABLE SUPPORT SECTION IN CUTTING MACHINE
Document Type and Number:
WIPO Patent Application WO/2011/065214
Kind Code:
A1
Abstract:
For example, in the case of a portable cutting machine which performs a cutting operation in such a way that a user holds the same by hand and moves the same, the lower portion of a circular cutting blade protruding from the lower surface of a base which is placed on an article to be cut, is covered with a movable cover. In the past, bearings were used to secure dustproofness and smooth opening/closing operations. Therefore, there was a problem of high cost. In this regard, disclosed is a dustproof structure wherein a conventionally used bearing is omitted while securing dustproofness with regard to a bearing box for a movable cover, resulting in low cost being achieved. A ring spring (31) is interposed between a support circular ring section (25b) and an axial restriction section (19) in such a way that a necessary and sufficient clearance for smoothly opening and closing the movable cover (25) is set between the support circular ring (25b) for the movable cover (25) and a rotating boss section (17a) for the bearing box (17), with the result that the dustproofness of a movable cover support section is improved.

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Inventors:
OKUMURA MICHIO (JP)
Application Number:
PCT/JP2010/069809
Publication Date:
June 03, 2011
Filing Date:
November 08, 2010
Export Citation:
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Assignee:
MAKITA CORP (JP)
OKUMURA MICHIO (JP)
International Classes:
B23D47/00; B23D45/16; B27B9/00; B27G3/00
Foreign References:
JP2001047407A2001-02-20
JPH0711302U1995-02-21
JP2003251601A2003-09-09
JPH0727121Y21995-06-21
JP2501707Y21996-06-19
JPH0241901U1990-03-22
JP2005001896A2005-01-06
Other References:
See also references of EP 2508285A4
Attorney, Agent or Firm:
OKADA PATENT & TRADEMARK OFFICE, P. C. (JP)
Patent business corporation Okada international patent firm (JP)
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