DE9213406U1 - Coupling wrench for fire service fittings - Google Patents

Description

Rolf de Vries, Nachtigallenweg 42a, D-vtf 2070 Ahrensburg

Description

Title:

Coupling wrench for fire service fittings

Design of the subject matter of the application;

The invention relates to the new design of a coupling key so that it can be folded up and enables the coupling of couplings of sizes B, C and D (Storz system DIN 14 810, DIN 14 811 Part 1) and the opening and closing of foam containers.

State of the art:

According to DIN 14 822 Part 1, a coupling key is standardized that enables couplings of sizes B and C to be connected and foam containers to be opened and closed. This key measures 280 x 72 x 6 mm. No coupling key is provided for couplings of size D. German fire departments are required to only use standardized devices.

Criticism of the state of the art:

The aforementioned coupling key is too large for a firefighter to carry with him at all times, e.g. in a pocket of his emergency suit. Coupling keys are stored on the vehicles, but they are often located far away from the advancing crews.

Rolf de Vries, Nachtigallenweg 42^, D^W 2070 Ahrensburg

To connect suction and pressure hoses, a coupling key is required for sizes B and C, but also for size D (for proportioning hoses).

Task:

The above-mentioned problems are to be solved by the collapsible design of the coupling key which can also be used for coupling size D

Solution;

The solution takes the requirements of DIN 14 822 Part 1 into account as far as possible.

In particular, the design of the cam part is not changed except for the attachment of an additional cam (2).

Description of the embodiment; The drawing shows the coupling key once opened and once folded in a side view and once opened in section. The drawing shows how the sickle-shaped cam part (1) and the handle (5) are arranged and are connected to one another in an articulated manner by the axis (3).

It can be seen that the clutch key can be folded by turning the sickle-shaped claw part around the axis (3) in the handle and how its size is thereby reduced.

Rolf de Vries, Nachtigallenweg 42a, D->7 2070 Ahrensburg

When the clutch wrench is folded, the sickle-shaped cam part (1) rests between the sides of the handle (5) and on the axle (4), which prevents the cam part from slipping and thus prevents incorrect use of the clutch wrench.
A shackle can be attached to the axle (4).

Achievable benefits:

The aforementioned disadvantages of the currently common clutch key have been eliminated.

The new clutch key, with its dimensions of 155 x 70 x 12 mm, is almost reduced to the size of a pocket knife and can therefore be carried with you at all times.

Furthermore, its applicability has been expanded to include one coupling size.

Claims (3)

Rolf de Vries, Nachtigallenweg <t2a, D-W 2070 Ahrensburg Protection claims 1. Coupling wrench for fire service fittings characterized by that it has a sickle-shaped cam part (1) with several cams and a handle (5) attached to it in an articulated manner, which consists of two flat materials located at a certain, constant distance from each other. The sickle-shaped cam part (1) and the handle are matched in size to one another in such a way that the cam part (1) can be folded into the handle (5) by simply twisting it around the aforementioned joint (3). 2. Coupling bowl for fire service fittings according to claim 1, characterized, that it has a cam part (1) which is made of a flat material, is connected at one end in an articulated manner to the handle (5) and has one or more cams in the sickle-shaped part, which are arranged in such a way that all existing sizes of fire service couplings or similarly designed couplings or components equipped with similar couplings can be opened and closed by using a single coupling key. Rolf de Vries, Nachtioallenwec; 42a, D-W 2070 Ahrensburg 3. Coupling bowl for fire service fittings according to claim 1, characterized, that it has a handle (5) which consists of two flat materials located at a certain, constant distance from each other and is connected at one end to the sickle-shaped cam part (1)
and at its other end has a hinge pin (4) which can be used to attach a shackle, but at the same time is also used to prevent the sickle-shaped cam part (1) from slipping when it is folded into the handle.