a century. The first patent for a screw-type band clamp was issued in 1896. They first saw use in everyday life by a former British navy commander, who manufactured them commercially with the Jubilee brand.
The clamps are embossed with a band versus the slotted band of the traditionally manufactured hose clamps.
The slotted band will extrude the hose out of the slots after being tightened over the tube. The cheese grater affect damages the hose’s material and prevents it from sliding down the pipe. The connection of the hose to the band slots causes a reactive torque moment that has to be eliminated with a higher installation torque. The high friction also is caused by the tiny contact area between the threads of the screw and the slot of the band. This implies that less torque will be transferred to tension. The trapezoidal shape of the embossed band allows for more contact with screw threads and, consequently, more torque gets transferred into band tension.
Rolled-formed edges on embossed clamps limit damage to material of the hose as well as the likelihood that the installer will be injured. zjlaliq2el.