140results about How to "Guaranteed freedom of movement" patented technology

A disposable mask for dust protection is provided for maintaining contact with the wearer's face even when moving one's mouth, in which the strap is fixed to maintain tension, and to enable easy adjustment of the length of the strap. The disposable dust protective mask includes a filter body having a front filter, upper and lower sealing wings coupled to the front filter such that they can fold which closely contact the ridge of the nose and the jaw of the wearer, first spread-guiding lines, formed at respective sides corresponding to the front filter, for guiding the upper and lower sealing wings to be spread, second spread-guiding lines for guiding the upper and lower sealing wings to be spread, strap adjusting devices coupled to both sides of the filter body, and a strap connected to the strap adjusting devices and hung on the wearer. The upper and lower sealing wings spread apart along the first and second spread-guiding lines depending on movement of the wearer's mouth and jaw.

The invention relates to an engineering machine and an engineering method, in particular to a flexible filler inlaying machine for inlaying flexible filler into concrete panel seams of concrete face rockfill dams, as well as a concrete panel seaming method. The construction quality of flexible filler water-stopping layers of surface layers of the concrete face rockfill dams relates to dam safety and stability. Low efficiency and low quality of filler inlaying are always difficult problems perplexing engineers and technicians. The design of the invention seeks to be simple in equipment and concise in process, so as to achieve the effects of easy equipment maintenance and simple operation in practical construction, and to achieve high-speed high-quality construction. The inlaying machine is characterized in that: the inlaying machine has a machine body; a power machine is arranged inside the machine body; the power machine is connected with an extrusion screw of a filler chamber through a speed governor; the filler chamber is provided with a feed port; the machine body is provided with a traveling device; and an outlet of the filler chamber is provided with a die head and / or a mouth piece for controlling the shape of an filler extruding cross section. The concrete panel seaming method is characterized in that: filler in the filler chamber of the filler inlaying machine is heated through the extruding effect of the extrusion screw and / or through a heater; and the heated filler passes through the die head and / or the mouth piece which is arranged in the outlet of the filler chamber to control the shape of the filler extruding cross section, and then the extruded and shaped filler enters into concrete panel seams through inlaying.