Hose clamp

Hose clamps (also hose clips, mostly in Switzerland called hose clamps) attach a hose end to a fixed line or to a hose connector.

Construction

Hose clamps consist of a ring-shaped metal strip, wire or double wire, rarely also made ​​of plastic. To tighten the clamp has usually a set screw. This is mounted so that the inner diameter of the hose clamp is reduced by rotating the screw. Wherein the hose is pressed onto the underlying connector and seals this off.

Hose clamps are mainly used in sanitary area, used in automotive and mechanical engineering. They are usually manufactured to DIN 3017 and are made ​​of metal.

As the inventor of the classic worm-drive clamp (brand name Jubilee) applies Lumley Robinson, founder of L Robinson and Company, in 1921.

Types of hose clamps

• Worm-drive clamps have a metal band. This metal strip is perforated continuously, wherein the coil turns of the screw in each case engage in the individual oblique oval elongated holes of the perforation. Alternatively, are continuous depressions or elevations stamped into the band, serve their gently slant groove as a mating thread for the screw. This version is considerably stronger than the perforated design. Worm-drive clamps are used to secure smooth tubes. They have the disadvantage that the existing thread of notches is less reliable than, say, a normal full thread. Advantage is usually large adjustment range and the effective production.

• Double wire clamps have no metal band but instead two wires. To tension the wires here, a screw is used with a nut, the end of which usually acts in the pressing direction. Double wire clamps are used to secure wire-reinforced hoses.

• Hose belt is smooth metal strip, which is by a closure, which operates on the Spanngurtprinzip held together. So by rolling over a slotted core and a ratchet as a releasable backstop.

• Hinge bolt clamps are made of a metal band having two folded- in the hinge pin. A bolt has a transverse thread to the longitudinal axis, the other a through hole. The clamp clamped by a screw each other pulls the two bolts. These clamps have the advantage that they can be reused many times without having to wear funktionsbeeinträchtigend. The metal strip is slotted in the middle for the passage of the screws in the region of the belt covers, the strap ends are secured by welds.

• Spring hose clamps are designed as a spring. You will be pushed to the assembly using a pair of pliers by squeezing the tabs apart and close due to their spring automatically to the hose. Spring hose clamps can be designed as a metal band, single - wire or double wire. These clamps have the disadvantage that its tone is usually lower than with clamps with screw. Therefore, the hose can be solved relatively easily again. For tubes with high internal pressures ( eg compressed air hoses) these clamps are not practical.

• Nylon hose clamps at both ends have saw-toothed barbs that snap firmly into place when compressed.

• More rarely, cable ties are used as a hose clamp and accordingly called hose clamps.

• Multiple hose clamps are used to file movable sections of hose lines to avoid chafing and baffling, as return lines of hydraulic cylinders to backhoe joints, supply lines for fuel gas and oxidizing gas to gas burners for brazing and oxyacetylene White burner. Also for arranging power supply and control cables to articulated steering and gantry cranes.