FIELD OF THE INVENTION
The present invention relates to a handle for a tool.
SUMMARY OF THE INVENTION
More specifically, in accordance with the present invention, there is provided an assembly, comprising a handle, a tool head and a sleeve, wherein an end of the handle engages within the sleeve on a first end of the sleeve and the sleeve engages within a socket of the hand tool on a second end of the sleeve, the sleeve thereby securely connecting the handle and the tool hand.
There is further provided a method, comprising providing a handle, providing a sleeve, providing an implement head comprising a socket, inserting the handle, from an end thereof, within the sleeve by a first end of the sleeve, and inserting the sleeve, by a second end thereof, within the socket of the implement head.
Other objects, advantages and features of the present invention will become more apparent upon reading of the following non-restrictive description of specific embodiments thereof, given by way of example only with reference to the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
In the appended drawings:
FIG. 1 is a perspective view of a tool according to an embodiment of an aspect of the present invention;
FIG. 2 is a schematical view of an assembly according to an embodiment of an aspect of the present invention;
FIG. 3 is a schematical view of an assembly according to an embodiment of an aspect of the present invention;
FIG. 4 is a side schematical view of an assembly according to an embodiment of an aspect of the present invention
FIG. 5 is a schematical view of an assembly according to an embodiment of an aspect of the present invention;
FIG. 6 is a perspective view of a sleeve according to an embodiment of an aspect of the present invention;
FIG. 7 is a perspective view of a sleeve according to an embodiment of an aspect of the present invention;
FIG. 8 is a side view of a sleeve according to an embodiment of an aspect of the present invention;
FIG. 9 is a detail of FIG. 8;
FIG. 10 is a detail of FIG. 1;
FIG. 11A is a schematical view of a set-up used for testing an assembly according to an embodiment of an aspect of the present invention; and
FIG. 11B shows comparative resistance test results obtained with the setup of FIG. 11A.
DESCRIPTION OF EMBODIMENTS OF THE INVENTION
The present invention is illustrated by the following non-limiting examples.
As shown for example in FIG. 1, a tool 10 according to an embodiment of an aspect of the invention comprises a handle 12, a tool head 14 and a sleeve 16 connecting the handle 12 to the tool head 14.
Typically, the tool head 14 comprises a tool body 18, such as the scoop of a shovel as illustrated herein for example, and a socket 20 for connection with the handle 12.
In FIGS. 1-3, the handle 12 is shown with a cylindrical shape. The handle 12 may be a wood shaft, or it may be made of a composite material, engineering plastic, or metal such as steel or aluminum for example, or of a combination thereof.
The socket 20 may have a tubular shape of a generally constant diameter; or the socket 20 may have a conical shape, i.e. as a tube with a decreasing diameter from an open end 21 thereof to its connection to the too head 14, as illustrated in FIGS. 2 and 3 for example. The socket 20 may be made in a composite material, an engineering plastic, or a metal such as steel or aluminum for example.
In case of a hollow handle 12, an insert 23, in a composite material, steel, wood or plastic for example, may be inserted to extend within the handle 12 and the socket 20 for supporting the assembly of the handle 12 with the socket 20 and connecting the handle 12 with the socket 20, from the inside of the handle 12 and of the socket 20 as shown in FIG. 4.
FIG. 2 illustrates an embodiment of a wood handle for example, the handle 12 having a first diameter ∅1 up to a shoulder (J), and after the shoulder (J) a slowly decreasing diameter over a length L2 down to a diameter ∅3 at a free end 22 thereof (K), with ∅3<∅1. As best seen in FIG. 3, the sleeve 16 has a first diameter S1>∅1 over a length LS1, from a first end thereof 24 up to a shoulder (JS), and after the shoulder (JS) a slowly decreasing diameter over a length LS2, down to a diameter S3, at a second end 26 thereof, with ∅3<S3<∅1<S1. The handle 12 can thus be inserted, from its free end 22, inside the sleeve 16, by the first end 24 of the sleeve 16, over a length LS1, i.e. until the shoulder (J) of the handle 12 abuts the shoulder (JS) of the sleeve 16, then the length L2 of decreasing diameter of the handle 12 is within the length LS2 of decreasing diameter of the sleeve 16, while a length of the largest diameter ∅1 of the handle 12, corresponding to the length LS1 of the sleeve 16 is covered, on its outer surface, by the sleeve 16. The handle 12, with an end region thus covered with the sleeve 16 is then inserted within the socket 20, up to the shoulder (JS) of the sleeve 16.
As shown in an embodiment illustrated in FIG. 5, the shoulder (J) of the handle 12 and the shoulder (JS) of the sleeve 16 are optional.
The handle 12 is thus inserted within the sleeve 16 into a press-fit engagement at least along a distance, with at least a length thereof within the socket 20 covered by the sleeve 16. In FIG. 5, the handle 12 emerges out of the sleeve 16 within the socket 20 for example, whereas in FIG. 2, the handle end within the socket 20 is flush with the sleeve end within the socket 20. The handle 20 may also end short within the sleeve 16 within the socket 20. The sleeve 16 is inserted within the socket 20 into a press-fit engagement, thereby proving an overlap of the sleeve 16 over the handle 12 on a first end and an overlap of the socket 20 over the sleeve 16 on the opposite end of the junction between the handle 12 and the tool head 14, thereby securely connecting the handle 12 and the tool head 14 together.
Instead of a shoulder (JS), the sleeve 16 may have a length of continuously decreasing diameter followed by a length of constant diameter for example. Still alternatively, the sleeve 16 may have a constant diameter all over a length thereof, a longitudinal slot 17 ending at its end 26, as shown in FIGS. 5 and 6 for example, allowing its insertion within a reduced diameter of the socket 20 by closing of the edges of the slot 17 one against the other.
As shown in FIG. 5 for example, the handle 12 may also be deprived of shoulder (J) and instead have a conical shape over a length Lc thereof, i.e. a length Lc of decreasing diameter, so that the handle 12 is inserted, from its free end 22, inside the sleeve 16, by the first end 24 of the sleeve 16, over the length Lc, until its diameter reaches that of the sleeve 16.
Rivets 28 may be used to further secure the assembly together (see FIGS. 2, 5, 10). Alternatively, in case of an insert 23 extending between a hollow handle and the socket as discussed hereinabove in relation to FIG. 4, bending of the insert 23 within the socket 20 is found to create a gripping contact with the inner surface of the socket 230, thereby further securing the assembly together.
As illustrated in FIG. 4 for example, an outer ring 29 may be provided at the junction between the socket 20 and the sleeve 16 for preventing the socket 20 from opening, in case of a slotted socket for example, and further securing the assembly together.
Thus the sleeve 16 may have a constant or a decreasing diameter, it may comprise a shoulder or be deprived thereof, it may comprise a longitudinal slot 17, so as to adjust between the handle and the socket.
Embodiments of the sleeve 16 are shown in FIGS. 6-9.
As shown in FIGS. 6 and 7, a rubber sleeve ramp 30, 31 may be provided at the junction between the first end 24 of the sleeve 16 and the handle 12 to accommodate variations of the diameter of the handle 12 for example, as well as to cover the edge of the end 24 of the sleeve 16 for example (see FIGS. 2 and 3).
As shown for example in FIGS. 1, 8-10, the outer surface of the sleeve 16 may be provided with knurling (K) thereby providing a gripping area.
The handle 12 may be a hardwood handle or a composite such as in glass fibers for example. The sleeve may be in a metal such as iron, in a plastic or a composite material, or engineering plastic for example.
Depending on the tool head, the tool may be a shovel, a spade, a fork, a shingle remover, a pry bar, a nail puller, a loglifter, a log roller etc. . . .
Load tests were performed on different tools comprising a handle connected to a tool head by inserting the free end if the handle within the socket of the tool head and riveting as known in the art, each one characterized by its weight, and with an implement comprising an assembly of a handle and a tool head as described herein, by hanging an increasing load to the handle of the tools maintained generally horizontal by the tool head thereof (see FIG. 11A). Tools of the present invention could withstand larger loads and/or provide enhanced and safer grip and control, due to the sleeve which may be provided with knurling for example, as described hereinabove (see FIG. 11B).
The scope of the claims should not be limited by the embodiments set forth in the examples, but should be given the broadest interpretation consistent with the description as a whole.
Patent Application
20190045697
