The cleaning device is for cleaning the inner surface of pipes. The method is for manufacturing the cleaning device and the use is of a vehicle anti-skid chain for cleaning the inner surface of a pipe. The cleaning device has a sleeve, to which are attached studded chains composed of steel links and surface hardened.

A unidirectionally bendable transmission chain. At a first side thereof, an inner stop plate is fixed between a pair of inner chain plates at both ends of pin shafts, and an outer stop plate is fixed between a pair of outer chain plates at both ends of the pin shafts. Both ends of the inner stop plate are flush with axes of pin holes provided at both ends of the inner chain plates, and both ends of the outer stop plate are respectively provided with extensions beyond the outer chain plates; the extensions of the outer stop plate form a one-sided support for the inner stop plate to prevent the transmission chain from bending toward the first side, thus the transmission chain bends unidirectionally toward a second side opposite to the first side. A hoisting mechanism and a liftable roadblock having the above transmission chain.

A unidirectionally bendable transmission chain. At a first side thereof, an inner stop plate is fixed between a pair of inner chain plates at both ends of pin shafts, and an outer stop plate is fixed between a pair of outer chain plates at both ends of the pin shafts. Both ends of the inner stop plate are flush with axes of pin holes provided at both ends of the inner chain plates, and both ends of the outer stop plate are respectively provided with extensions beyond the outer chain plates; the extensions of the outer stop plate form a one-sided support for the inner stop plate to prevent the transmission chain from bending toward the first side, thus the transmission chain bends unidirectionally toward a second side opposite to the first side. A hoisting mechanism and a liftable roadblock having the above transmission chain.

A camera mount, assembly, and method for supporting a number of cameras side-by-side along a linear or curvilinear path. The camera mount includes a rigid body having a tab and a coupling flange extending from opposite ends thereof. Tabs and flanges of adjacent mounts are overlapped and coupled via a fastener installed therethrough. A spring washer is installed on the fastener to preload the joint against relative movements, but the mounts are pivotable by hand about an axis formed by the fastener. Angular orientation between adjacent mounts can be defined using a gauge inserted between opposing faces of the mounts. Cameras are disposable on each mount and retained thereon by an elastic band extending over the camera and retained on catches provided on each side of the mount. The assembly of camera mounts is substantially rigid thus requiring few support devices.

A method for maintaining a chain or chain link comprises inspecting the chain or chain link for signs of wear without using tools and changing the orientation of the chain or chain link or replacing the chain or chain link if signs of wear are detected.

A method for maintaining a chain or chain link comprises inspecting the chain or chain link for signs of wear without using tools and changing the orientation of the chain or chain link or replacing the chain or chain link if signs of wear are detected.

A belt actuator system includes at least a drive unit, a belt zipper system configured to form a third belt element in a zip-fastening manner of a first belt element and a second belt element comprising: a guiding arrangement configured to move the first belt element and the second belt element in a synchronous manner; a first zip-fastening arrangement, wherein the first zip-fastening arrangement is configured to connect a first part of the first belt element with a second part of the second belt element in a zip-like manner to obtain the third zip-fastened belt element, and wherein the drive unit is connected to the first zip-fastening arrangement configured to drive the first zip-fastening arrangement.

A belt actuator system includes at least a drive unit, a belt zipper system configured to form a third belt element in a zip-fastening manner of a first belt element and a second belt element comprising: a guiding arrangement configured to move the first belt element and the second belt element in a synchronous manner; a first zip-fastening arrangement, wherein the first zip-fastening arrangement is configured to connect a first part of the first belt element with a second part of the second belt element in a zip-like manner to obtain the third zip-fastened belt element, and wherein the drive unit is connected to the first zip-fastening arrangement configured to drive the first zip-fastening arrangement.

A forming device for forming links in the shape of a Mbius strip includes a rotation module with an inner path. The forming device has a widening for 180 rotation of a strip introduced into the rotation module. The rotation module has an inlet suitable for one end of a strip, an outlet suitable for the strip and the inner path extends from the inlet to the outlet. The widening is adapted for rotation of the end of the strip 180 about its longitudinal axis. The device also includes a gas injector positioned at the inlet of the rotation module intended to drive the strip through the inner path of the rotation module.

A forming device for forming links in the shape of a Mbius strip includes a rotation module with an inner path. The forming device has a widening for 180 rotation of a strip introduced into the rotation module. The rotation module has an inlet suitable for one end of a strip, an outlet suitable for the strip and the inner path extends from the inlet to the outlet. The widening is adapted for rotation of the end of the strip 180 about its longitudinal axis. The device also includes a gas injector positioned at the inlet of the rotation module intended to drive the strip through the inner path of the rotation module.