Apparatus for feeding and compressing gases and liquids

Claim 1

An apparatus for feeding and compressing gases and liquids, comprising a cylindrical casing having plane shaft mounted walls, a tubular multilayered strip having at least one layer of spring sheet metal and mounted within said casing along an axial surface line on the inner surface of the casing, means to attach said strip to said casing along said axial surface line comprising two attachment blocks each mounted in axial direction adjacent the lateral edges on the inner surface of the strip, the circumference of said strip being smaller than the inner circumference of the casing and its width being so dimensioned that its lateral edges are at a minimum distance from the end walls, a driving shaft mounted coaxially and rotatably in the end walls, and having arms extending radially outwardly, means secured on said arms of said driving shaft and disposed within said strip, which means force said strip against the inner wall of the casing substantially linearly, said means comprising a rotatably mounted cylindrical roller butting against the inner surface of said strip, the roller being of a width which is somewhat smaller than the distance between the attachment blocks, inlet and outlet openings provided in side-by-side arrangement in the cylindrical casing, between which openings the strip is secured to the casing along the surface line thereof, the outlet opening being provided with a check valve.

Claim 2

An apparatus for feeding and compressing gases and liquids, comprising a cylindrical casing having plane shaft mounted walls, a tubular multilayered strip having at least one layer of spring sheet metal and mounted within said casing along an axial surface line on the inner surface of the casing, means to attach said strip to said casing along said axial surface line comprising two attachment blocks each mounted in axial direction adjacent the lateral edges on the inner surface of the strip, the circumference of said strip being smaller than the inner circumference of the casing and its width being so dimensioned that its lateral edges are at a minimum distance from the end walls, a driving shaft mounted coaxially and rotatably in the end walls, and having arms extending radially outwardly, means secured on said arms of said driving shaft and disposed within said strip, which means force said strip against the inner wall of the casing substantially linearly, said means comprising a rotatably mounted cylindrical roller butting against the inner surface of said strip, the roller being of a width which is somewhat smaller than the distance between the attachment blocks, inlet and outlet openings provided in side-by-side arrangement in the cylindrical casing, between which openings the strip is secured to the casing along the surface line thereof, the outlet opening being provided with a check valve.