FR2587263A1 - Two-part spanner - Google Patents

Abstract

The present invention relates to a two-part spanner. This spanner consists, in its first part, of a conventional spanner head, equipped on its periphery with one or more studs 3. The second part of this spanner consists of a bent handle fitted to the first part by a male/female coupling by means of the hollow part of the handle; and of the stud 3. The bent handle has a straight extension, which fits to the bent handle by a male/female coupling. This spanner according to the invention is particularly intended for grasping nuts to which access is almost impossible with an ordinary spanner.

Description

 The present invention relates to a flat key, making it possible to tighten or unscrew easily a nut located in a place qualified as inaccessible to an ordinary flat key.

 This flat key is made up of two metallic parts.

 A first part (fig 1) for gripping the nut, a second part (fig 2) forming a handle, fitting onto the first part.

 The first part (fig 1) looks like a classic flat head (1), fitted with parallel, simple or multi-sided jaws (hexagonal for example) coming to take the nut to unscrew.

 The outer part of this head has an ovalized periphery (2).

 At this periphery and substantially perpendicular thereto is fixed at least one lug (3) or projection intended to come to cooperate with the handle (fig 2) according to a male-female coupling (3) (4).

 These lugs have a pure cylindrical external shape, or cylindrical with asperities, or at least one flat, a shape with twelve, six or four sides is also suitable.

 The number of pins is preferably equal to five.

 The second part is presented as a handle (fig 2) elongated rectilinear, bent or of any longitudinal shape.

 One of its ends has a hollow part (4) whose hollow shape is complementary, to the external shape of the pins, so as to come to fit on one of said pins (3).

 When the hollow part is not circular but has at least one flat face or asperities such that a threaded element introduced transversely into the hollow part (4) the handle is thus prevented from turning around the lug.

 According to a variant of the invention, the first handle (fig 2) can be extended by a second handle (fig 3) which comes to adapt, so, as by a coupling, male-female or female-male (5) (6) at the end of the first handle opposite the end of the first handle fitting onto a lug.

 This male-female coupling piece may have flats or asperities preventing the first handle from rotating relative to the second.

 In conclusion, for the practice of this tool, and its rational use, several wrenches, of different diameters will be necessary, depending on the pitch of the nut to be screwed or deflected.

A single angled handle (fig 2) and its extension (fig 3)
will suffice for the use of one of the keys mentioned above.

 The pins or sailLies of the different keys, will all be of the same shape and mm'e -dimension.

Claims (10)

 1) flat wrench, for screwing or unscrewing a nut, characterized in that it consists of a first part (fig 1) for gripping the nut comprising on its outer periphery, at least one fixed lug substantially perpendicular to this periphery, on which a second part (fig 2) forming a handle fits.  2) flat key according to claim 1 characterized in that the adaptation between the first and the second part is effected by a female mtle coupling, the lug (3) being the male part.  3) flat key according to claim 2 characterized in that the second part has a hollow end (4)  4) Flat key according to claim 3 characterized in that the pin is round (3) and the hollow part of the poi gonze (fig 2) is also round.  5) flat key according to claim 4 characterized in that the lug (3) has at least one flat face, and that the hollow part of the handle (4) also has a flat face.  6) flat key according to claim 2 characterized in that the lug (3) has a polygonal outer shape, and the hollow part of the handle (4) is also polygonal in shape.  7) Flat key according to claim 1 characterized in that the handle (fig 2) is bent.  8) flat key according to claim 1 characterized in that the handle (fig 2) bent has a straight extension (fig 3) which adapts to this handle bent by a mtle-female coupling (5) and (6 ).  9) A flat wrench according to claim 1 by the fact that the number of pins (3) is preferably five.  10) A flat key according to claim 1 characterized in that the axes of the pins (3) form between them angles of the order of 45.