Patent
Striking tool
| العنوان: | Striking tool |
|---|---|
| Patent Number: | 9,999,967 |
| تاريخ النشر: | June 19, 2018 |
| Appl. No: | 13/395569 |
| Application Filed: | October 22, 2010 |
| مستخلص: | A technique for making a handle vibration-proof while avoiding size increase is provided in an impact tool. The impact tool has a striking mechanism part for driving a tool bit in its axial direction, a motor for driving the striking mechanism part, a tool body housing the motor and striking mechanism part, an outer shell housing covering part of the tool body, a handle that is integrally formed with the outer shell housing and extends transversely to the axial direction, a first handle end portion formed on one extending end of the handle, a second handle end portion formed on the other extending end of the handle, a first elastic element that connects the first handle end portion and tool body for relative movement in the axial direction, and a second elastic element that connects the second handle end portion and tool body for relative movement in the axial direction. |
| Inventors: | Furusawa, Masanori (Anjo, JP); Kasuya, Yoshihiro (Anjo, JP); Takeuchi, Hajime (Anjo, JP) |
| Assignees: | MAKITA CORPORATION (Anjo-shi, JP) |
| Claim: | 1. An impact tool comprising: a striking mechanism part that strikes a tool bit in an axial direction of the tool bit, a motor that drives the striking mechanism part and is disposed such that a rotation axis of the motor runs transversely to the axial direction of the tool bit, a tool body having a first portion that houses the motor and a second portion that houses the striking mechanism part, the tool body having a front end region to which the tool bit is coupled and a rear end region, the front end region of the tool body being closer to the tool bit, in the axial direction, than the rear end region of the tool body, an outer shell housing that covers the second portion of the tool body, the outer shell housing having a front end region and a rear end region, the front end region of the outer shell housing being closer to the tool bit than the rear end region of the outer shell housing in the axial direction, the front end region of the outer shell housing having a bottom that is open other than at a front end of the bottom, the bottom being spaced from the rotation axis in a direction transverse to the axial direction and facing the first portion of the tool body, the first portion of the tool body extending from the bottom of the front end region of the outer shell housing in the transverse direction, a handle that is designed to be held by a user and integrally formed with the outer shell housing on a side opposite from the tool bit and extends transversely to the axial direction of the tool bit, a first handle end portion formed on a first extending end of the handle, a second handle end portion formed on a second extending end of the handle opposite to the first extending end, a first elastic element that is disposed between the first handle end portion and the tool body and connects the first handle end portion and the tool body such that the first handle end portion and the tool body can move in the axial direction of the tool bit with respect to each other, a second elastic element that is disposed between the second handle end portion and the tool body and connects the second handle end portion and the tool body such that the second handle end portion and the tool body can move in the axial direction of the tool bit with respect to each other, an auxiliary handle directly coupled with an outer surface of the outer shell housing front end region, and a third elastic element extending about an outer circumference of the tool body front end region between an inner peripheral surface of the outer shell housing front end region and the outer circumference of the tool body front end region such that the outer shell housing front end region and the tool body can move with respect to each other, thereby reducing vibration transmitted from the tool body front end region to the auxiliary handle, wherein the outer circumference defines a circumferential plane that is orthogonal to the axial direction of the tool bit, wherein the first portion of the tool body that houses the motor is exposed to an outside of the impact tool, wherein the outer shell housing, the handle, and the auxiliary handle are integrally formed, and wherein the integrally formed outer shell housing, handle, and auxiliary handle are elastically connected with and movable relative to the second portion of the tool body and the first portion of the tool body that houses the motor. |
| Claim: | 2. The impact tool as defined in claim 1 , wherein the third elastic element comprises a plurality of elastic receivers which are disposed at predetermined intervals in a circumferential direction and held in contact with the inner peripheral surface of the outer shell housing front end region and the outer circumference of the tool body front end region. |
| Claim: | 3. The impact tool as defined in claim 1 , wherein the outer shell housing covers only the second portion of the tool body entirely along the striking mechanism part in a longitudinal direction of the striking mechanism part. |
| Claim: | 4. The impact tool as defined in claim 1 , wherein the third elastic element includes one or more elastic members that extend about a circumference of the second portion of the tool body. |
| Claim: | 5. The impact tool as defined in claim 1 , wherein the auxiliary handle is coupled with the outer surface of the outer shell housing front end region by a side grip mounting part, the third elastic element being disposed between the auxiliary handle and the outer circumference of the tool body front end region in the circumferential plane. |
| Patent References Cited: | 4478293 October 1984 Weilenmann et al. 4749049 June 1988 Greppmair 5400860 March 1995 Best 5697456 December 1997 Radle et al. 6076616 June 2000 Kramp 6148930 November 2000 Berger et al. 7017680 March 2006 Arich 7331408 February 2008 Arich 7523790 April 2009 Arakawa 7591325 September 2009 Robieu 7705497 April 2010 Arich 8091651 January 2012 Kuhnle et al. 8403076 March 2013 Iwakami 8579043 November 2013 Hirayama 8939231 January 2015 Roberts et al. 2004/0124721 July 2004 Pfisterer 2004/0177981 September 2004 Berger 2004/0211575 October 2004 Soika 2006/0011365 January 2006 Stirm et al. 2006/0219418 October 2006 Arakawa et al. 2007/0034396 February 2007 Berger et al. 2007/0034397 February 2007 Fischer et al. 2007/0044984 March 2007 Fischer 2008/0047724 February 2008 Fischer et al. 2009/0148246 June 2009 Nishikawa et al. 2009/0266571 October 2009 Baumann et al. 2009/0314507 December 2009 Iwakami 2010/0018734 January 2010 Frauhammer et al. 1822925 August 2006 1 752 257 February 2007 2 415 563 February 2012 U-54-89699 June 1979 A-10-217065 August 1998 A-2003-165073 June 2003 A-2006-272511 October 2006 A-2007-44869 February 2007 2008161036 July 2008 A-2009-241158 October 2009 |
| Other References: | Aug. 14, 2012 International Preliminary Report on Patentability issued in Application No. PCT/JP2010/068749. cited by applicant Feb. 1, 2011 International Search Report issued in International Patent Application No. PCT/JP2010/068749 (with translation). cited by applicant Chinese Office Action issued in Chinese Patent Application No. 201080058098.6 dated Sep. 4, 2014 (with translation). cited by applicant Russian Office Action issued in Russian Patent Application No. 2012131749 dated Oct. 21, 2014 (with translation). cited by applicant Jan. 28, 2014 Extended European Search Report issued in European Patent Application No. 10839061.8. cited by applicant Feb. 19, 2015 Office Action issued in Russian Application No. 2012 131 749. cited by applicant Dec. 31, 2015 Office Action issued in U.S. Appl. No. 14/854,869. cited by applicant Sep. 2, 2013 Office Action issued in Japanese Patent Application No. 2009-295405. cited by applicant Aug. 26, 2016 Office Action Issued in U.S. Appl. No. 14/854,869. cited by applicant Feb. 8, 2017 Office Action issued in U.S. Appl. No. 14/854,869. cited by applicant Jun. 29, 2017 Office Action issued in U.S. Appl. No. 14/854,869. cited by applicant |
| Assistant Examiner: | Stinson, Chelsea |
| Primary Examiner: | Tecco, Andrew M |
| Attorney, Agent or Firm: | Oliff PLC |
| رقم الانضمام: | edspgr.09999967 |
| قاعدة البيانات: | USPTO Patent Grants |
| الوصف غير متاح. |