Abstract: An agricultural machine comprises a self-propelled chassis (1) and an arrangement for displacement of the working member (9) over the field surface, comprising a hermetic chamber (3) with a port (4), a source (2) of a fluid agent pumped into the chamber (3) under a pressure, and a flexible hose (7) wound onto a drum (5) and internally accommodating a tractive element (8). A section of the tractive element (8) projecting from a free end of the hose (7) mounts an attachment carrying the working member (9) and movably connected with the flexible hose (7). The free end of the hose (7) is passed through the chamber (3), turned inside out and hermetically secured in the port (4) of the chamber (3) so that it forms an annular space (A) communicating with the chamber (3) and by changing its volume under the action of the fluid agent moves the hose (7) over the field, which pushes in front of itself the attachment carrying the working member (9).

Abstract: A batch-action apparatus for filtering a fluid medium comprises a hermetically sealed housing (1) communicating with systems (9, 10 and 11) for feeding the fluid medium, discharging the clean medium, and evacuating filter cake.The housing (1) accommodates a flexible filter hose (2) one end (4) of which is turned inside out and attached to the housing (1), whereas the other end (7) thereof is connected to a hoisting mechanism (3) acting to move the hose (2) relative to the fixed end (4) of this hose. The end (4) of the hose (2) turned inside out forms an annular cavity (8) to which the fluid medium is fed and which varies in volume under the action of filter cake build-up or in response to the movement executed by the hoisting mechanism (3).

Abstract: An apparatus is used for both repair of operating pipelines and protection of newly built pipelines and comprises a cleaning tool (1) which is caused to move in the interior of the pipeline (5) under the action of a flow of fluid containing a dissolved inhibitor. The cleaning tool comprises a hub (3) on which blades (4) are secured in two rows to engage the pipeline surface. The blades (4) are displaced with respect to one another so that the angle between two adjacent blades is from 10.degree. to 25.degree. to define apertures along the periphery of the cleaning tool through which jets of fluid can flow to remove a part of deposits and to impregnate the remaining layer with the inhibitor dissolved in the fluid as so to form a protective coating. A support member (11) carrying an impact-type alarm member is mounted on the cleaning tool (1) so as to facilitate location of the apparatus in the pipeline and to maintain the apparatus in a desired position.

Abstract: A pump comprising a casing (1) having interior space in which there is provided a flexible hose (2) mounted for reciprocations having one end (5) thereof which is turned inside out and secured along the perimeter to the inner wall of the casing (1), and the other end thereof which is closed so as to sealingly divide the interior space of the casing (1) into two chambers (6,7) of which one chamber (7) communicates with a source (12) of fluid being pumped and with a delivery line. In order to move the flexible hose (2) in one direction, its closed end is secured to a drum (3) operatively connected to a motor and installed in one of the chambers (6,7), and movement in the opposite direction is effected under the action of working fluid pressure built-up in one of the chambers (6,7).

Abstract: A device for converting energy of a fluid medium into mechanical work comprises a hermetically sealed chamber (1) communicated through valves with systems for supply and discharge of a fluid medium. The chamber has an opening (4) in which a sleeve (5) of flexible material is secured through one end along the perimeter, the sleeve being mounted in the chamber (1) with a possibility of reciprocation relative to the secured end so that during the motion from the initial position to the extreme position a part of the sleeve (5) is turned inside out forming a space (9) communicating with the chamber (1). The sleeve (5) through its other end is connected to a drum (7) disposed in the chamber (1) and mounted on a shaft (6) coupled to a reverser (11) through an overrunning clutch (8). In the initial position the sleeve (5) is wound on the drum (7).

Abstract: An intermittent-action apparatus for filtering liquid has a sealed casing (1) in which a hollow cylinder (8) is mounted so as to define with the casing (1) an annular space (9) communicating with a system for removing precipitate. A driven drum (12) is provided in the upper part of the casing (1), and one end (11) of a filtering hose (10) is secured to the drum, the other end (13) of the hose being turned inside out and secured along the perimeter to the hollow cylinder (8) so as to define around the remaining part of the hose an annular space (14) for liquid being filtered, the annular space varying in volume during accumulation of precipitate therein and during movement of the hose under the action of the drum.

Abstract: A method of protecting the internal surface of a pipeline against corrosion resides in introducing into the pipeline a composition comprising 0.01 to 1 part of a phosphate and a silicate. The phosphate can be sodium polyphosphate or monosubstituted potassium phosphate. The silicate can be an alkaline metal silicate or silicon dioxide. The weight ratio of the phosphate to the silicate varies from 9-50:1, respectively, and the composition includes up to 100 parts of water. The composition is formed by fusing the phosphate and the silicate at a temperature of about 800 to 10000 degrees C. and cooling the fused composition until a vitreous structure is formed. The composition is then introduced into a pipeline containing water having a P.sub.2 O.sub.5 concentration of about 0.3 to 3.5 milligrams per liter.

Abstract: An apparatus for filtering a fluid medium has a sealed ring-shaped body in the interior of which is movably mounted a flexible filtering member having a toroidal shape. Slide valves divide the interior of the body into two portions, one of which receives the supply of fluid medium to be cleaned and removes the fluid medium cleaned by the filtering member, while the other cleans the filtering member by removing cake from it.

Abstract: An apparatus for transferring a fluid medium comprises a housing (1) having an interior (4) in the top portion (2) thereof communicating through selector valves (5,9) with the atmosphere and with an intake line (6), the bottom portion 3) of the housing (1) accommodating an actuator 13) capable of reciprocations relative this bottom portion of the housing and blocking its cross-section, the actuator (13) having a non-return valve to communicate a tank (12) containing the fluid medium with the interior of the housing 1) at the top portion (2) thereof.

Abstract: According to the invention, the device comprises a housing (1), two chambers (2, 3) interconnected through a pipeline (4) and disposed in the housing opposite to each other. Each chamber (2 or 3) has a piston made in the form of an elastic sleeve (10 and 11), whose one end is turned inside out and secured to the inner surface of the pipeline (4) at the point of its connection to the chamber (2 to 3). Each piston is kinematically connected to the working member (7) via a shaft (5 or 6) mounted in the chamber (2 to 3), one end of which is kinematically connected to the working member (7), and a drum (8 or 9) connected to the other end of the shaft (5 or 6) and provided with a reverser. Secured on the drums (8 and 9) are the other ends of the sleeves (10 and 11). The pressure space formed by the spaces of the chambers (2, 3) and the space of the pipeline (4) is communicated with a fluid medium supply system (14).