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  Hand sanding toolRelated Patent Categories: Abrading, Tool Support For Flexible-member Tool, Including Resiliently Urged Tool Holding MemberHand sanding tool description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20060172670, Hand sanding tool. Brief Patent Description - Full Patent Description - Patent Application Claims
PRIOR ART [0001] The present invention is based on a hand grinder as generically defined by the preamble to claim 1. [0002] From British Patent Application GB 2 322 582, a motor-driven hand grinder is known which is provided with a system for clamping and tightening, i.e. making taut, a grinding sheet that can be mounted on the underside of its grinding disk. This system functions reliably and is easy to manipulate, but the effect of making the grinding sheet taut is relatively limited, and hence a perceptible relative motion between the grinding sheet and the grinding disk cannot be precluded. ADVANTAGES OF THE INVENTION [0003] The invention having the characteristics of claim 1 has the advantage that an inexpensive hand grinder is created that by simple means enables highly effective clamping and at the same time effectively making the grinding sheet taut on the grinding disk, in which a relative motion between the grinding sheet and the grinding disk is as good as precluded, and because the pivot shaft of the clamping body is located substantially vertically above the clamping point, on top of the grinding disk above the mounting face, and because the mounting face spaced apart from pivot shaft in a defined way is curved, an especially long slaving path is provided for making the grinding paper taut. [0004] Because the clamping body is equipped as a cylindrical roller, and the associated region of the top of the grinding disk is equipped as a concave hollow-cylindrical groove, upon pivoting of the clamping body what occurs first is a thrusting slaving of the grinding sheet on the top of the grinding disk, until it is made as taut as is maximally possible. Upon displacement of the grinding sheet, the contact pressure between the clamping body and the mounting face of the grinding disk simultaneously increases considerably, so that when the highest clamping and locking force is reached, while the end of the grinding sheet is firmly held, a maximum tightening effect prevails at the same time. [0005] Because the clamping body is provided with a plastic hose as its friction lining, and in particular one carried by a metal core, a clamping body of simple construction with a good grip is created. [0006] Because the metal core of the clamping body firmly holds one clamping lever each, particularly on both of its axial ends, in a way secured against relative rotation and in captive fashion, particularly by means of radial and axial bores into which the clamping lever can be inserted or placed, the clamping body is especially sturdy and is capable of transmitting strong tightening and clamping forces uniformly and gently and in a positionally secured way to the grinding sheet. [0007] Because the clamping lever can be locked in a spring-prestressed fashion in its clamping position, particularly by an end remote from the edge, the clamping force on the grinding sheet does not lessen. [0008] Because the metal core has axial grooves on its circumference, and to which the bent-over regions of the slaving levers can be placed and extend with flush contours with the core, the slaving levers are mounted especially securely by the plastic hose slipped over the core. [0009] Because the mounting face extends at an angle to the pivoting path of the clamping body that is close to self-locking, especially secure clamping of the grinding sheet, yet with easy release, is possible. [0010] Because in the release position of the clamping body, there is a slit between the clamping body and the mounting face, into which slit the end of the grinding sheet can be inserted beneath and/or onto the clamping body, the grinding sheet can be clamped especially securely. [0011] Because the mounting face is curved, in particular in concave fashion, and extends toward the outermost pivot circle, leading to the shaft, of the clamping body in the region near the edge of the grinding disk with a spacing amounting to several millimeters and intersects the pivot circle in the region remote from the edge, a stop for the clamping body is created with which secure clamping of the grinding sheet is possible. [0012] Because the clamping body has at least two eccentric cams, which in particular are on the order of round teeth and which extend parallel to its shaft and/or to the top of the grinding disk over the width of the clamping body, the radius of which eccentric cams relative to the pivot shaft is greater than the spacing between the pivot shaft and the mounting face, the latter in particular extending rectilinearly and smoothly, the grinding sheet can be tightened especially securely directly after being clamped. [0013] Because the clamping body, and in particular its eccentric cams and/or the mounting face--at least in part--comprise elastically deformable material--the clamping device is automatically adaptable to grinding sheets of different thickness that are to be clamped. [0014] Because a threshold, which in particular is rounded, is located on the front and rear edge of the grinding disk and by way of it the end of the grinding sheet can be guided such that this end is located in floating fashion between the threshold and the mounting face, and after being clamped it can be made taut by simply pressing down on the floating region. [0015] Because between the front and rear edges on the top of the grinding disk there is an indentation in the grinding disk, into which the grinding sheet guided over it can be pressed, and the indentation is elastically spanned, in particular by a leaf spring, the grinding sheet after being clamped can be made taut by pressing down on its region located in floating fashion. [0016] Because the leaf spring can be pressed jointly with the grinding sheet into the indentation by means of the second eccentric cam, it is not only made taut but also reliably clamped at a further point. [0017] Because the second eccentric cam has a greater diameter than the first, it forms a rotation stop, past which the clamping body cannot be rotated farther, and which defines the clamping position of the clamping body. [0018] Because the first eccentric cam, in the clamping position, is located at least 2 mm in front of and parallel to the vertical extending from the pivot shaft to the mounting face, and in the process the eccentric cams are braced, spreading away from one another, on the mounting face, the clamping position is adjustable in overlocking fashion in a markedly perceptible way and can be released in overlooking fashion only counter to a resistance, precluding an unintentional release. DRAWING [0019] The invention is described in further detail below in terms of an exemplary embodiment and in conjunction with the drawing. [0020] Shown are [0021] FIG. 1, a three-dimensional view of the hand grinder of the invention; Continue reading about Hand sanding tool... Full patent description for Hand sanding tool Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Hand sanding tool patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. Start now! - Receive info on patent apps like Hand sanding tool or other areas of interest. ### Previous Patent Application: Insertion tool for a machine tool Next Patent Application: Conductive polishing article for electrochemical mechanical polishing Industry Class: Abrading ### FreshPatents.com Support Thank you for viewing the Hand sanding tool patent info. 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