Patent Application
20100221065
Implements, utensils, tools or hand instruments have a wooden handle which serves the purpose of joining the assembly of the implement-tool, for example, hammers, axes, hoes, etc.
Said union gradually deteriorates with use and continual knocks, causing wear and harmful looseness.
This Patent solves this problem by achieving a fitted and/or precise junction of the handle and the tool, which is maintained without looseness over time, through use and knocks, and is capable of adjusting the tightness of fit, achieving maximum safety and preventing a loose fit and the separation of the handle from the implement.
With the junction achieved with this invention, the life of the implement is prolonged and its features are maintained in time as in the first day of use.
The object of this invention distinguishes this junction between the handle and the implement where:
a) The implement contains a hole where the head of the handle is imbedded, the end surface of said handle head remaining free,
b) having a binding screw, with self-locking built into the screw itself; the body of the screw is indirectly joined by screwing to the handle head, and which consists of a head which abutts indirectly in the implement, using a washer: so that the handle head can move lengthways acting as a nut with respect to the binding screw.
According to a preferred procedure, the hole of the implement is blinded by a front wall, where the handle head is imbedded, the end surface of said handle head remaining free inside said blind hole.
According to another preferred procedure:
a) the hole of the implement is pass-through, consisting of an entry zone and an exit zone, at least the surface of the latter zone being convergent toward the interior of the hole.
b) the handle has its handle head, with an entry zone and a exit zone, the outer surface of the entry zone being in conjunction with the corresponding zone of the hole in the implement where it is imbedded, the end surface of said handle head being free, and the handle head having an inner hole in whose exit, in the salient zone, there is a wedge, which, when pressing on the salient zone, connects it with the corresponding zone of the hole in the implement where it is imbedded.
To better understand the object of this invention, a practical, preferred method of making it, subject to minor changes which will not fundamentally alter it, is illustrated in the drawings.
The following is an example of practical, non-limiting makeup of this invention.
As illustrated in
The implement (2) serves the female function and for this purpose has a hole (11) where the handle head (1) is imbedded, which serves the male function.
The surface of the hole (11) and the outer surface of the handle head (1) are connected, perfectly fitting each other, because both have received precision machining. The lock between both surfaces is perfect.
The surface of the hole(11) is convergent, that is to say, the surface of its section diminishes progressively along the length of the hole, said section presenting any shape, circular, elliptic, or polygonal.
The hole is (11) is blind, blinded with a front wall (20) which forms a unit with the implement itself (2).
Said front wall(20) carries a small hole (21) penetrated by the binding screw (7) which screws indirectly to the handle head (1) through a third element (3), which is fastened to said head handle (1).
Specifically, and in accordance with the makeup illustrated, said hole (21) which houses the screw (7) make up a countersink (22) where a washer is placed (6) so that the head (9) of the binding screw (7) abutts indirectly in the implement (2) and, on screwing, the handle head (1) can move lengthwise, acting as a nut with respect to the binding screw. (7).
The blind hole (11), the handle head (1), the third element (3) and the screw (7) that joins them are coaxial.
In addition, the handle head (1) is fitted by tightening in, at least, the mouth zone (a1) of the blind hole (11) of the handle (1)—zone (a1) in
In accordance with
the implement (2) serves the female function and for this purpose has a pass-through hole (11′) where the handle head (1) is imbedded, which serves the male function.
the surface of the pass-through hole (11′) and the outer surface of the handle head (1) are connected, perfectly fitting each other, because both have received precision machining. The lock between both surfaces is perfect.
The pass-through hole (11′) has an entry zone (111) and an exit zone (112) which have surfaces which are convergent toward the centre of the pass-through hole (11′), for example, two truncated cones, truncated-pyramid shaped, etc. and any one as a section, for example, circular, elliptic, polygonal.
The head handle (1) has an entry zone (Z1) and an exit zone (Z2) whose outer surfaces are connected with those which have their corresponding entry and exit zones in the pass-through hole (11′), once the wedge (5) has acted as follows.
The head handle (1) is imbedded in the pass-through hole (11′).
An inner hole is made (40) in the head handle (1), in whose exit (31) there is a wedge (5).
Preferably, the salient zone (Z2) has a slot or expansion zone which makes possible its penetration/entry through the zone of minimum radius (Z3) of the pass-through hole, the salient zone (Z2) being located in the exit zone (112) of the pass-through hole (11′) and fitting said exit surface (112) with a wedge (5), for example, in shape of truncated cone. The salient zone (Z2) is bendable and expandable.
There is a binding screw (7) to join the handle head (1) to the implement (2), having a third element for this purpose (3) which is fastened to the handle head (1), for example, by screwing (13) a pointed salient (12) which penetrates deeply into the handle head (1), or through any other conventional means.
The body section (14) of the third element (3) can be any existing one.
Specifically, and in accordance with the makeup illustrated in
The pass-through hole (11′), the handle head (1), the third element (3) and the screw (7) which join them are coaxial.
The binding screw (7) can be tightened more or less and the gaps appearing between the head handle (1) and the implement (2) in the pass-through hole (11′) can be progressively corrected, thus achieving a tight fit in the entire section of friction between the implement (2), the handle head (1) and the wedge (5).
In the makeup of
Between the implement (2) and the stop washer (19) there is an anti-turn pin (11).
In both cases:
The binding screw (7) has a self-blocking mechanism (4) built into the screw itself. More specifically, the self-blocking mechanism (4) is applied directly to the body (16) of the screw (7) so that, when knocked, vibrations cannot unscrew the screw (7).
The connection between said third element (3) and the handle head (1) is made in two ways:
a) making up, at the end of the element, (3) a salient (12) which is screwed from the outside (13);
b) having, radially, a pin (8) which serves an anti-turning function of said element (3) with respect to the handle head (1) and an axial stop function against said handle head (1), thus preventing the disconnection of said third element (3) and the handle head (1).
| Number | Date | Country | Kind |
|---|---|---|---|
| P-200600363 | Feb 2006 | ES | national |
| P-200600861 | Apr 2006 | ES | national |
| Filing Document | Filing Date | Country | Kind | 371c Date |
|---|---|---|---|---|
| PCT/ES07/00080 | 2/14/2007 | WO | 00 | 7/18/2008 |
