Auxiliary handle

• US 8,621,719 B2
• Filed: 06/12/2009
• Issued: 01/07/2014
• Est. Priority Date: 06/17/2008
• Status: Expired due to Fees

• Current Assignee: Makita Corporation
• Original Assignee: Makita Corporation
• Inventors: Nakashima, Keiji, Arakawa, Takuo, Bito, Shinya
• Primary Examiner(s): MORGAN, EMILY M
• Application Number:
  US12/457,489
• Publication Number:
  US 20090307875A1
• Time in Patent Office: 1,670 Days
• Field of Search: 164/22, 164/26, 164/40, 164/46, 164/06, 164/36
• US Class Current: 16/426
• CPC Class Codes: B25F 5/006 Vibration damping means
• CPC Class Codes: B25F 5/026 in the form of an auxiliary handle B25F5/024 takes precedence

Abstract

It is an object of the invention to provide a technique for a reduction of vibration of an auxiliary handle for a hand-held power tool. The object can be achieved by a representative auxiliary handle. The auxiliary handle includes a ring-like mounting part, a pair of bases, a rod-like grip, one or arms and an elastic region. The bases are formed on a free end of the mounting part. The bases of the mounting part and extending end portions of the arms are arranged parallel to the longitudinal direction of the grip. The bases of the mounting part and the extending end portions of the arms are clamped by a bolt and a nut such that the mounting part holds the power tool body. The elastic region is provided in at least one of the mounting part, the bases and the extending end portions of the arms.

Claims

1. An auxiliary handle comprising:

a plurality of ring-like mounting components having projections and depressions formed discontinuously in the circumferential direction in an inner circular arc surface of each of the plurality of ring-like mounting components, the plurality of ring-like mounting components being capable of holding a power tool body of a hand-held power tool from outside,

a pair of bases formed on a free end of the plurality of mounting components,

a rod-like grip to be held by a user,

one or more arms provided with the grip, the arms extending in a direction transverse to a longitudinal direction of the grip, wherein the bases of the plurality of mounting components and extending end portions of the arms are arranged parallel to the longitudinal direction of the grip, and wherein the bases of the plurality of mounting components and the extending end portions of the arms are clamped by a bolt and a nut such that the plurality of mounting components hold the power tool body, and

a plurality of elastic regions having projections and depressions formed discontinuously in a circumferential direction of the plurality of ring-like mounting components to reduce vibration, the plurality of elastic regions being provided in at least one of the plurality of mounting components, the bases and the extending end portions of the arms, wherein

the plurality of elastic regions are provided on the inner circular arc surfaces of the plurality of mounting components which hold the power tool body, and

the projections of the plurality of ring-like mounting components are inserted within corresponding depressions of the plurality of elastic regions, and the projections of the plurality of elastic regions are inserted within corresponding depressions of the plurality of ring-like mounting components, thereby increasing a joint area and a joint strength between respective ring-like mounting components and elastic regions.