FR2777821A1 - Device for the operation of portable hand tools - Google Patents

Abstract

The device consists of two rollers (11), which are free in rotation, but limited in translation, on two symmetrical rods. The rods are linked to the rest of the portable manual tool. The rollers are formed with relevant shape for finger grips and are configured according to the needs of the tool, pincers, screwdriver or various others.

Description

-1- The present invention relates to a device for actuating by

  multiple and continuous rotations, by the fingers of the carrying hand, of

  many tools, utensils or portable instruments.

  The handles of these objects are traditionally taken after each

  half-rotation, which increases time, effort, and sometimes poses problems.

  In the exemplary case of common screwdrivers (like clamps, even corkscrews etc.) the hand pushes and tightens the handle, turns partially, then loosens slightly to return in the other direction and so

  after. It is tedious, and often the other hand is unavailable (security etc.).

  Some utensils have mechanisms allowing quick and one-handed work, but they are rarely as simple, robust, light, without games,

  independent (no electricity, no compressed air) and above all also economical.

  Also with pliers, by twisting metallic wire (with sometimes back

  elastic), for example, or when screwing, we encounter the same problems.

  The device according to the invention overcomes these drawbacks. According to a first characteristic, it indeed comprises multiple rollers or better, two rollers which roll in the hand. Adapted to pliers, they will preferably rotate on their two symmetrical lever handles, and in a similar way, adapted to the handles (or handles) of screwdrivers, clamps, corkscrews (etc.), they will preferably rotate on two pins symmetrical attached to utensils. The portable utensils concerned will be actuated by the continuous and rapid main rotation induced by the thumb on the one hand and the other fingers on the other hand (one hand is enough) on these rollers or rollers (preferably two symmetrical rows, but others variants are possible) simultaneously with the tightening of the handles, the carrying and the axial forces to direct the utensil. As will be seen below, in particular with the drawings: the fingers essentially bear on these rollers or rollers which should cover the handles as much as possible, with large diameters, shapes and arrangements specific to each utensil, in particular so that the hand can stay in position during rapid rotations (the handles of existing pliers have shapes suitable for the efforts of the hand for the intended uses: some, as well

  that some other utensils are therefore interesting and easily adaptable).

  -stems (but also screws, tubes, wires ...), even straight, can in the closed hand, cross or go along the device without hindering the continuous rotation, which

does not allow the crank.

And it is obvious that: -2-

  -wheels and rollers roll freely, but are stopped in translation.

  -without mechanism, the main rotation can be reversed, or split for significant efforts by wrist movements (with reduction

  corresponding to the symmetrical spacing).

  -wheels and rollers preferably have flexible surfaces which deform under

  the support of the fingers, allowing that intense uses and efforts do not damage them.

  -the device allows a continuous movement, without problems of repetitive backlash (pawls, mechanical connections) and elastic resistance, one hand would be enough (safety etc.), it can constitute an insulation (electrical and

  thermal), be wear-resistant and guaranteed for life.

  According to particular embodiments: -in all cases, the best would be a roller threaded directly on a

  straight rod, or, failing that, multiple and short casters on a curved rod.

  -for clamps, multiple casters can even be threaded (with diametral play) on handles-levers curved and imperfectly section

  round (but possibly a fully flexible roller could rotate).

  advantageous, the classic looped steel wire handle (fitted with a wood spin, corkscrew, etc.) can also be fitted with eight to forty

  multiple casters similar to the previous ones (preferably about fifteen).

  -solidated with a screw, the handle will move relative to an element

  threaded (case of the clamp, the bearing extractor ...).

  -solid with a nut, the handle will be crossed by a screw that will not interfere with the hand (case of the tensioner called lantern or cage ...). Other passages or guides, in the axis or laterally, would allow the hand to rotate a

  utensil continuously around passers-by (rod, screw, tube, wire ...).

  The accompanying drawings illustrate the invention:

  Figures 1 and 2 show the action of the hand according to the invention.

  Figure 3 shows, from the side, a pincer fitted according to the invention.

  Figure 4 shows, from the side, a clamp equipped according to the invention.

  Figure 5 shows, from the side, a screwdriver, handle according to the invention.

  Figure 6 shows, from the side, a lantern tensioner according to the invention.

  With reference to these drawings, FIGS. 1 and 2 represent two instants of the rotation of a handle: the fingers (the thumb on the one hand and the opposite fingers on the other hand) force the rods (2) to turn in the arrow direction (f) with -3-

  thrusts (p) on rollers (1) turning on themselves in opposite directions (i).

  In the embodiment according to Figure 3, recommended for pliers, two straight lever handles (12) of the pincers carry free rollers (11), limited in translation with washers (14) by shoulders (15) and nuts (16 ) hidden by the caps (17) with collar preferable for wedging the hand. In addition to other uses, the user will train the pincers (one hand is enough), in rapid and continuous rotation, by movements of the fingers, without friction, while tightening, (without requiring locking of the lever handles) to twist the metallic wires. In the embodiment according to FIG. 4, the curved lever handles (22) of the pliers, each equipped with nine casters (21) (preferably three to fifteen contiguous casters 1 to 4 cm long, depending on the curve) profile triangular or trapezoidal not pinching the skin offer a good grip as much in traction (twisting of wire, unscrewing ...) as in pressure (screwing). In the embodiment according to FIG. 5, the two straight pins (32) of the tapered rollers (31) preferably form a neighboring angle 20 open towards the front (which can be up to 40), for better grip when the thrust. The pins are fixed in "bridges": the "bridge" (38) is reduced and rounded (it must not touch the hand when turning), and the "bridge" (39) serves as the basis for the rod (cut) of the screwdriver (it could be a chuck holder, or other utensil to push). The hand is propped up by the flanges (33) and a taper of the surrounding rollers 10 (possible up to). In the embodiment according to Figure 6, it is desirable that simple cylindrical rollers (41) are threaded on parallel tie rods (42) fixed in the threaded "bridges" (the bridge (48) on the right, the bridge (49 ) on the left) for the hooks whose screws pass in the axis of this tensioner, turning without pushing

nor traction.

  All the utensils according to the invention are actuated similarly by the same movement of the fingers. The rollers can be obtained by injection molding, in a flexible and resistant plastic (elastomer.

  ). The rolls can be overmolded on rigid tubes. Fully rigid casters (or rollers) (plastic, wood, etc.) would nevertheless be suitable for moderate use. A wide variety of utensils, the rest of the structure is metallic..DTD: generally, can be modified (or created) with this invention.

  By way of nonlimiting example, a hand must be able to surround the device, rollers and rollers preferably having average diameters of the order of 20 mm (the possibilities are between 10 and 35mm) and

  covering a maximum of stems which would generally measure from 5 to 18cm.

  The device according to the invention is particularly intended for rotation

  continuous hand-held mechanical clamping tools.

-4-

Claims (1)

  l) Device for manually operating portable utensils (by continuous rotations), characterized in that it comprises for this purpose multiple rollers or, better, rollers (1, 11, 21, 31, 41) (free in rotation but limited in translation on two preferably symmetrical rods, connected to the rest of the utensil), constituting the essential support of the fingers and configured according to whether the invention applies to pliers, screwdrivers or to various other tools, useful utensils, portable instruments to be equipped in this way (even by simple modification of the existing one).   2) Device according to claim 1 characterized in that rollers or rollers preferably have flexible surfaces deforming under the support of the fingers, and average diameters between 10 and 35mm and preferably around 20mm, each rod which measures usually 5 to 18cm to be covered to the maximum.   3) Device according to claim 1 or claim 2 characterized in that, in particular when it comes to clamps, rollers or rollers (11, 21) are   preferably threaded directly onto the two symmetrical handles (12, 22).   4) Device according to any one of the preceding claims, characterized   in that the straight lever handles (12) (fig. 3) of pliers (or pincers) are preferably fitted with rollers (l 1) at the ends of which wedges   (17) (in the form of flanges) of the hand are recommended.   ) Device according to claim 1, claim 2 or claim 3, characterized in that the lever handles (22) curves (fig.4) of pliers are preferably and according to the curve, each equipped with three to fifteen rollers contiguous (21) (between 1 and 4 cm long) with span profile triangular or trapezoidal.   6) Device according to claim 1 or claim 2 characterized in that, when it comes to utensil structures other than tongs, rollers (31,41 ...) (preferably in the form of rollers) are strung on pins (32, 42 ...) (preferably two pins, straight, symmetrical and fixed in the remainder handle). -5-   7) Device according to claim 1, claim 2 or claim 6 characterized in that, when it is a utensil working in thrust, the straight pins (32) (fig.5) preferably form an open angle forward, close to 20 but up to 40, preferably with rollers (31) with a taper close to 10 but up to 25 and flanges (33).   8) Device according to claim 1, claim 2 or claim 6 characterized in that for a utensil also to be pulled in rotation, it is advantageous to use a wire ring handle, which will share multiple rollers ( 21) (between fortnight and quarantine, the fortnight approximately having to be better suited), contiguous, with profile of the   triangular or trapezoidal scope.   9) Device according to claim 1, claim 2 or claim 6 characterized in that, for a utensil to be rotated without pushing or pulling, it is desirable that simple cylindrical rollers   (41) are threaded on parallel straight pins (42).   ) Device according to any one of the preceding claims, characterized   in that the structure (or a part) of the utensils can provide a passage in their axis or laterally for rods, screws (fig. 6), tubes, wires (possible lateral guidance).