Abstract: A device for sealing the detachable joints of tubing elements in pneumatic transport facilities comprises two flanges one of which is rigidly affixed on one of the tubing elements, while the other flange (2) is mounted with a clearance (a) on the other tubing element (4), is kinematically coupled with a mechanical actuator (5) so as to be traversed lengthwise the other tubing element (4) and has a contrivance to hermetically seal up the joint between said other flange (2) and said other tubing element. The kinematic coupling of the other flange (2) with the mechanical actuator (5) is effected through a frame (6) mounted with a possibility of oscillating within the amount of the aforementioned clearance about pivot pins (11) located outside the outline of the other flange (2). The other flange (2) is mounted on the frame (6) through two hinge joints whose pivot pins (14) are situated on the opposite sides of the flange in a plane passing through the geometric axis of the tubing element (4).

Abstract: A gate comprising a body (1) hermetically connected to inlet and outlet branch pipes (2,3) that are arranged coaxially relative to each other and connected to the pipe-line of the pneumatic conveyer. The body (1) accommodates a branch pipe (4) having a cross-section corresponding to the cross-sections of the inlet (2) and outlet (3) branch pipe and kinematically connected to a drive (5) turning it. Rigidly secured to the outer wall of the branch pipe (4) disposed in the body (1) is a damper (6) used to overlap one of the branch pipes (2) connected to the body (1). The damper (6) mounts a ring-like member (7) made from a resilient material. The shape of the member (7) corresponds to the cross-section of the inlet branch pipe (2) to be overlapped. The branch pipe (4) is mounted in the body (1) so that it can swing to a certain extent in a plane perpendicular to the plane of the damper (6) and relative to an axis (8) passing below the longitudinal axis (9) of the inlet (2) and outlet (3) branch pipes.

Abstract: The gate comprises a damper /1/ overlapping the cross-section of a pipe-line /2/ and kinematically connected with a movable link /3/ of a drive /4/ turning it about an axle /5/ disposed on the pipe-line /2/, and a driven pin trip /12/ entering a hole made in the pipe-line and meant to hold the damper /1/ in the closed position. Secured on the damper /1/ is a bracket /8/, and in the kinematic chain connecting the damper /1/ with the drive /4/ there is an angular lever /9/ which is mounted so that it can turn through a limited angle and whose axle /10/ of turning is secured on the bracket /8/ parallelly to the axle /5/ of turning of the damper /1/. One arm of the angular lever /9/ is connected to the movable link /3/ of the drive /4/, and the damper /1/ has guides /13/ made thereon and accommodating a pin trip /12/ which is kinematically connected with the other arm of the angular lever /9/.