Patent Application
20200324382
The present invention generally relates to manual sharpening tools and in particular to curved clipper sharpeners having clipper cutting edge angle preservation and clearance for small jaw short clipper edges.
Conventional Handheld Sharpeners
A manicurist's nail clipping tool, like most cutting tools, will grow dull even quickly with some use. In many instances, the clipper, not unlike a chef's knife, may need sharpening after every use. The manicurist's nail clippers have notoriously short nose curved cutters, very necessary for the curved nails, but which make the clippers almost impossible to sharpened to a conforming cutting wedge angle.
Classic Sharpeners.
Sharpeners having a cutout recess formed in an end of the handle have come about, where a sharpener body has a whetting groove transversely formed in the sharpener body with a plate-shaped whetstones incline installed on opposing sidewalls of a whetting groove so that the whetstones form a V-shaped arrangement. However, the V-shaped wedge arrangement for the blade which is perfectly adaptable for a long straight knife edge does not accommodate short jawed clipper curved edge. Moreover the V-shaped arrangement is fixed and unchangeable whetting grove.
Other portable cutting-tool sharpeners disclose a compact housing of the box-type, having a central enlarged portion and two aligned, straight sections extending from the opposite sides of the enlarged portion. These have two parallel frame plates secured in one of the aligned straight housing sections, having motorized pulleys keyed to a driving roller journals between the parallel plates used as a driving “V-belt” of an endless abrasive band mounted around the roller and a driving roller and driven by the latter, arranged longitudinally between the parallel frame plates. These having the endless abrasive band exposed to allow sharpening of cutting tools by the moving endless abrasive band. As other sharpeners, this arrangement is adaptable for straight knife surfaces and does not accommodate short jawed clipper curved surfaces. In addition, the V-shaped arrangement is flexible but variably conformable and constantly changing the configuration around the cutting edge to be sharpened.
Other sharpeners have grinding cutting blades with a grinding wheels, having first and second grinding edges. These comprises rough grinding at least one surface of the cutting blade with the first grinding edge and finish grinding at least one surface of the cutting blade with the second grinding edge. These grinding edge guides controlling the abrasion provide respective angles of nominally 17 degrees and 20 degrees, and a reverse angle guide at nominally 22 degrees. These ranges exist because of the flexibility in the band and not suitable for strict stationary requisite angles which allow the user of a clipper to select only a range of angles for a given sharpening operation because the band will bend slightly as the blade is applied to the band abrasive.
The present invention discloses a hand-held sharpener device for sharpening short nose curved nail clippers having a whetting groove transversely formed in a sharpener supporting V-body block and the V-body block having two rectangular flat plate-shaped whetting surface assemblies inclinedly installed on two opposing sidewalls of a V-body block groove such that the whetting surface assemblies form specific preset and changeable angle V-shaped angles. The two rectangular plate-shaped whetting surface assemblies protruding beyond the v-block body and forming a cantilevered V-edge lip providing an extended sharpening surface beyond of the V-block body with a 1st flat plate-shaped whetting assembly having an rectangular frame with a frame held insert-removable flat plate having two flat sides, a side 1 fitting inside the frame and flush with the V-block, and a side 2 having an abrasive or whetting surface facing a 2nd flat plat-shaped whetting surface assembly. The 2nd flat plate-shaped whetting assembly having an installed rectangular frame with an insert-removable held fitting wedge cross-section rectangular perimeter piece having two sides with the insertable-removable 2nd frame held fitting wedge cross-section piece angle having numerical values in compliance with a pre-set total V abrasion wedge cross-section specific angles corresponding to sharpener cutting edge cross-section angles. A side 1 snuggly fitting held inside the 2nd assembly frame and flush with the 2nd assembly adjacent V-block surface, and a wedge piece side 2 having an abrasive or whetting surface facing the 1st rectangular flat plat-shaped assembly whetting surface such that a curved short head nail cutter with a specific angle wedge cross-section cutting edge can be sharpened to its specific angle edge sharpening with the same abrasion surface angle without being impeded by the sharpener block and handle.
Specific embodiments of the invention will be described in detail with reference to the following figures.
In the following detailed description of embodiments of the invention, numerous specific details are set forth in order to provide a more thorough understanding of the invention. However, it will be apparent to one of ordinary skill in the art that the invention may be practiced without these specific details. In other instances, well-known features have not been described in detail to avoid unnecessarily complicating the description.
The present invention discloses a compact portable sharpener for a curved jaw or nose short mouth nail clipper. The geometry of such clippers allows cutting edge preserving abrasion surface sharpeners sharpen a very limited number of times before the nail cutting edge wedge angle becomes too thick to sharpen.
An object of the invention is to provide a sharpening tool for short nosed curved clippers or cutters.
Another object of the invention is to provide a portable sharpener with holder.
Yet another object of the invention is to provide a sharpener which conforms even a slightly curved dull edge to a specific cutting edge cross-section.
A hand-held sharpener device showing V-body block 103 having two rectangular flat plate-shaped whetting surface assemblies 106107 inclinedly installed on two opposing sidewalls of a V-body block 103 groove. The whetting groove transversely formed in a sharpener supporting V-body block. The two rectangular plate-shaped whetting surface assemblies 106107 are protruding beyond the v-block body 103 and forming a cantilevered V-edge lip 105 establishing an extended sharpening surface beyond of the V-block body. Thus a curved short head nail cutter with a specific angle wedge cross-section cutting edge can be sharpened to its specific angle cutting edge sharpening with the same abrasion surface angle without being impeded by the sharpener block 103 and handle.
The sharpener device is specifically for sharpening short nose curved cutters and clippers has slidable lip 201 rigidly coupled to a V-block 203. The V-block 203 has rectangular flat plate-shaped whetting surface assemblies 207208 adjacent and rigidly coupled 209 to secure inward facing abrasive surfaces whetting groove. The wetting groove is formed in a sharpener surface supporting V-body block for back-and-forth sharpening of short nosed cutters. The two rectangular flat plate-shaped whetting surface assemblies 207207 are inclinedly installed on two opposing sidewalls of a V-body block groove such that the whetting surface assemblies form specific preset and changeable angle V-shaped angles. The two rectangular plate-shaped whetting surface assemblies protruding beyond the v-block body and forming a cantilevered V-edge lip 205 providing an extended sharpening surface beyond of the V-block body 203.
A 1st flat plate-shaped whetting assembly having an rectangular frame 303330317 with a frame held insert-removable flat plate 305332319 having two flat sides, a side 1 fitting inside the frame 303330317 and flush with a V-block, and a side 2 having an abrasive or whetting surface facing a 2nd flat plat-shaped whetting surface 310334323 assembly. The 2nd flat plate-shaped whetting assembly having an installed rectangular frame 311335325 with an insert-removable held fitting wedge cross-section rectangular component 313301327 having two sides. The insert-removable 2nd frame held fitting wedge cross-section piece 313301327 angle having numerical values in compliance with a pre-set total V abrasion angle 307329315 specific to standard hand held sharpener cutting edges angles. A side 1 309 333 321 snuggly fitting and held inside the 2nd assembly frame 311335325 respectively and flush with the 2nd assembly adjacent V-block surface, and a side 2 310 334 323 having an abrasive or whetting surface facing the 1st rectangular flat plat-shaped assembly whetting surface 305332319 respectively. The pre-set total V abrasion wedge cross-section specific angles 307327315 are 30°, 45°, or 60° respectively.
In an embodiment V-block grip handle 401 is shown. In addition a shaver-like handle 413 is shown rigidly coupled to a V-block 405 via an insert attaching arm 409 to a V-block base side coupler 407 rigidly attached to a V-block 405 which is coupled to at least two whetting surface assemblies 403 facing each other and forming a V-shaped groove 411 with block overhanging lip for sharpening small nose cutters to their full cutter nose length without sharpener block impediment. Thus a sharpener can be held steady via a grip handle or a shaver-like handle which allow the user sufficient lateral clearance for a short nose cutter to be sharpened along its total cutting length.
A handle 501513 is rotably coupled 503 to an extended V-block 505517 respectively with two V-block insert facing rectangular plate-shaped whetting surface assemblies 507511 each protruding 519 as shown in the crossection, extending beyond the v-block body 517 and forming a cantilevered V-edge lip 519 establishing an extended sharpening surface beyond of the V-block body.
Therefore, while the invention has been described with respect to a limited number of embodiments, those skilled in the art, having benefit of this invention, will appreciate that other embodiments can be devised which do not depart from the scope of the invention as disclosed herein. Other aspects of the invention will be apparent from the following description and the appended claims.
