Abstract: A sliding device with a base ring and a sliding ring. The sliding ring can be brought onto the base ring by way of a sliding movement which runs along a sliding axis, so that a sliding surface of the sliding ring which faces the base ring at least partly overlaps a base surface of the base ring which faces the sliding ring. The base ring in a base venting section on the base surface includes several base deepenings and base support segments which are each arranged in an alternating manner, in which the sliding ring in a sliding venting section on the sliding surface includes several sliding deepenings and sliding support segments which are each arranged in an alternating manner.

Abstract: A cylinder with a housing arrangement which including a cylinder housing in which a working recess for receiving a piston arrangement, the piston arrangement being linearly movable along a movement axis by way of subjecting the working recess to working fluid. The housing arrangement includes a first end cap which is fixed to the cylinder housing at the end side, the cylinder including a first base ring which is fixed to the first end cap and a first sliding ring which is fixed to the piston arrangement, the housing arrangement including a main movement region, a first damping region and a first venting region. The piston arrangement is movable into a first end position which corresponds to the first venting region, the first sliding ring can be brought onto the first base ring by way of a first sliding moment which runs along a sliding axis.

Abstract: A method for the detection of a position of an actuator element of a pneumatic actuator amid the use of a detection device with a control unit and with a first pressure sensor. The pneumatic actuator includes a venting device and an actuator housing in which a working recess with a first pressure chamber is formed. The actuator element is received in the working recess and by way of the subjection of the working recess to working fluid is movable in the working recess from a main movement section of the working recess through a first damping section of the working recess which is arranged adjacently to the main movement section, towards a first position, in which the venting device is configured to vent the working recess when the actuator element is situated in the first damping section, and the first pressure sensor is assigned to the first pressure chamber.

Abstract: A plug which fits into the top aperture of an air vent to be mounted on an air flow pipe or flume prevents cement flowing into the vent when a concrete floor is laid. The vent has a peripheral protrusion and a top flange. The plug protrusion snap fits into a in the top of the vent aperture and can be pulled out when the concrete is set. The plug has sides which extend upward an outward from the vent top so the laid concrete floor has a slot communicating with the vent and the vent top is installed below the floor and thus cannot be easily damaged by storing and removal of produce. The vent is inserted into a plate covering a flume where the plate has ribs and protrusions locating the required rebar and end tabs holding the plates end to end.

Abstract: A plug which fits into the top aperture of an air vent to be mounted on an air flow pipe or flume prevents cement flowing into the vent when a concrete floor is laid. The vent has a peripheral protrusion and a top flange. The plug protrusion snap fits into a in the top of the vent aperture and can be pulled out when the concrete is set. The plug has sides which extend upward an outward from the vent top so the laid concrete floor has a slot communicating with the vent and the vent top is installed below the floor and thus cannot be easily damaged by storing and removal of produce. The vent is inserted into a plate covering a flume where the plate has ribs and protrusions locating the required rebar and end tabs holding the plates end to end.

Abstract: Two slab bolster elements having rails supported on legs for carrying rebar during casting are connected end to end by a blade for sliding longitudinally of the rail into a female receptacle and a releasable locking mechanism which acts to lock the blade in the female receptacle. The locking mechanism comprises a notch on one side surface of the blade and a projecting portion of the female receptacle engaged into the notch. The projecting portion is carried on the female receptacle by a portion which can flex to cause the projecting portion to move away from the side surface of the blade. The female receptacle includes a manually depressible member on a side of the female receptacle opposite the projecting portion which when depressed provides motion toward the female receptacle which causes the projecting portion to move out of the notch.