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US 5,004,382 AGranted
Mist-spouting type drilling device
AssigneeYoshino Seiki Inc.
InventorYousuke Yoshino
Life of this patent
Estimating the term…
Abstract
Atomized water is produced by an atomizer mounted on a drilling device and introduced through a mist flow passage formed in a hollow drill. By applying the atomized water flowing from the atomizer to a cutting bit at the leading end of the drill through the mist flow passage, the cutting bit heated and reaching a high temperature in drilling is cooled. Thus, a rigid material of concrete or the like can be efficiently drilled without being stained with wetting.
Claims6
A portable drilling device comprising:
- (a) a rotary drill having:
- (i) a cutting bit at its distal end;
- (ii) a mist flow passage extending its axial length;
- (iii) at least one aperture in its distal end for the ejection of mist, said at least one aperture being in communication with said mist flow passage;
- and
- (iv) an aperture at its proximal end for the introduction of mist into said mist flow passage, said aperture being in fluid communication with said mist flow passage;
- (b) a drill driving means having:
- (i) first means for detachably gripping said rotary drill;
- (ii) second means for rotating said rotary drill;
- (iii) a mist chamber in fluid communication with said aperture in the proximal end of said rotary drill when said rotary drill is gripped by said first means;
- and
- (iv) a mist supplying hole leading from the exterior of said drill driving means to said mist chamber;
- (c) third means for atomizing water to create mist, said third means being;
- (i) in fluid communication with said mist supplying hole and
- (ii) integrally mounted on said drill driving means;
- (d) a throat nozzle received in said mist flow passage;
- and
- (e) an elastic sleeve disposed between said throat nozzle and said mist flow passage in tightly contacting engagement with each.
15 more elements
Dependencies are inferred from the claim text.