2results about "Pyrotechnical actuators" patented technology

In particular, it provides a tensioning device that can be more easily adapted to different requirements. [Solution] The present invention provides a tensioning device for a safety belt component, comprising a gas generator (1) for generating pressurized gas, a piston (2) that can be driven by the pressurized gas, a tensioning cable (3) connected to the piston (2) and that can be connected to a safety belt component (4) to cause a tightening movement, a tightening tube (5) for receiving and guiding the piston (2), and a receptacle (6) that houses the gas generator (1).

An exhaust port sealing device includes an internal piston whose outer peripheral surface matches the inner wall of the hull. The outer peripheral surface of the internal piston slides and seals against the inner wall of the hull at the exhaust port assembly. A barrel-shaped piston cylinder is fixedly installed on the hull. The bottom of the piston cylinder has a drive structure, and an internal piston is installed inside. The outer peripheral surface of the internal piston slides and seals against the inner wall of the piston cylinder. The movement direction of the internal piston is consistent with the axial direction of the hull. The internal piston is connected to the internal piston in the cavity via a connecting shaft. The drive structure drives the internal piston away from the bottom of the piston cylinder, thereby pushing the internal piston in the cavity to move and seal the exhaust port assembly via the connecting shaft. This device facilitates accurate measurement of the amount of water flowing into the exhaust port cavity during underwater movement of the hull with exhaust ports, and allows for detection of the water's morphology and quality, thus guiding hull design and predicting water ingress during actual hull operation.