Abstract: An apparatus for aerating water or other liquid is provided, and includes a flexible hose of rubber or other elastomeric material for disposal in the water or other liquid. The wall of the hose has a perforation, fine slits, openings or the like via which gas can escape into the liquid. A tubular connector is introduced into one end of the hose via which air can be supplied to the hose. That end of the tubular connector facing the interior of the hose has a flattened configuration and extends in the direction of the longitudinal axis of the hose. The wall of the tubular connector is provided with apertures for the passage of air.

Abstract: The invention relates to an apparatus for the introduction of gas into a liquid, especially for the aeration of water, and includes an elastic hose or tube that is disposed on a rigid profiled support member, whereby the tube has elastically expandable slits and whereby the air can escape into the water, in the form of small bubbles, through the expanded slits. The diameter of the tube is greater than the outer periphery of the profiled support member without recessed area or areas.

Abstract: An apparatus is provided for the gasification or aeration of liquids. Elongated aeration elements are connected to a distribution conduit and have an essentially rigid support tube about which is disposed a membrane of elastomeric material. Compressed gas introduced between the support tube and membrane escapes via slits in the membrane. An elastically deformable fitting is disposed between the distribution conduit and one of the aeration elements, and is disposed in a bore in the conduit. The fitting has an essentially flat portion, one side of which rests against the outer surface of the conduit, and the other side of which rests against an end of the aeration element. A hollow bolt is securely connected to the aeration element and is guided through a bore in the fitting into the interior of the conduit, where it is provided with apertures.

Abstract: An apparatus is provided for the gasification or aeration of liquids. Elongated aeration elements are connected to a distribution conduit and have an essentially rigid support tube about which is disposed a membrane of elastomeric material. Compressed gas introduced between the support tube and membrane escapes via slits in the membrane. An elastically deformable fitting is disposed between the distribution conduit and one of the aeration elements, and is disposed in a bore in the conduit. The fitting has an essentially flat portion, one side of which rests against the outer surface of the conduit, and the other side of which rests against an end of the aeration element. A hollow bolt is securely connected to the aeration element and is guided through a bore in the fitting into the interior of the conduit, where it is provided with apertures.

Abstract: A pin for playing ninepins or for bowling is provided. The base portion of the pin is detachable from the pin body and is replaceable. The base portion comprises a material that is more robust, wear resistant and/or has a higher resistance to scoring than does the remainder of the pin. The base portion can be provided with a reinforcement. The base portion has an annular support surface with at least one radially extending notch, a sharp inner edge, and high static friction to effect an improved ground adhesion.

Abstract: An apparatus for aerating water or other liquid is provided, and includes a flexible hose of rubber or other elastomeric material for disposal in the water or other liquid. The wall of the hose has a perforation, fine slits, openings or the like via which gas can escape into the liquid. A tubular connector is introduced into one end of the hose via which air can be supplied to the hose. That end of the tubular connector facing the interior of the hose has a flattened configuration and extends in the direction of the longitudinal axis of the hose. The wall of the tubular connector is provided with apertures for the passage of air.

Abstract: An apparatus for aerating water is provided, and includes a support body and disposed thereon a slitted sleeve of rubber or similar elastomeric material. The support body has sides of greatly different lengths, with the longer sides being essentially vertical. The support body is preferably a board-like, flat, rectangular upright support body.

Abstract: A holder is provided for an aeration system for introducing air or gas into a liquid. The aeration elements of the system include an elongated support body on which is disposed a sleeve-like cover of elastomeric material that envelops a support body and is provided with a plurality of slits that open under the influence of compressed gas. At least one fastening element is provided and has a component that extends at least partially about the aeration element and rests against the upper edge thereof and is spaced from a central portion of the aeration element. The fastening element also has a guide element for securement to a base or carrier member. The guide element has a groove for receiving the lower edge of the aeration element.

Abstract: An apparatus for aerating water with fine bubbles is provided. At least one strip-like, inextensible aerating element is provided that has an air supply channel and there above a portion that is provided with slits which elastically widen under the effect of a supply of air. At least one holding element is secured to the base of a water reservoir that is to be aerated, wherein the aerating element is longitudinally displaceably held by the holding element such that with the reservoir filled, a pulling action on one end of the aerating element results in withdrawal thereof from the holding element.

Abstract: An elongated apparatus is provided for aerating water, and includes a tubular support body and a sleeve of elastomeric material that surrounds the support body and is provided with slits that open to allow fine bubbles to pass into the water. To achieve a uniform supply of the sleeve with little loss for long apparatus, the inner side of the sleeve is provided with one or more groove-like channels that extend lengthwise relative to the sleeve.

Abstract: A water aerating device is provided and includes a rigid, round, support plate that in an operating position is disposed essentially horizontally. An elastic plate rests on the support plate and is provided with a plurality of fine slits such that by at least one opening of the support plate, air can be introduced between the support plate and the elastic plate for expanding the slits. The elastic plate has an annular rim that rests against an outer surface of the support plate. A fastening ring surrounds the support plate and is axially displaceable relative thereto. A radially inwardly directed projection of the fastening ring acts upon a rim of the elastic plate such that displacement of the fastening ring in a fastening direction results in an increase of the distance of the rim from the upper surface of the support plate.

Abstract: A screen conveyor belt for farming equipment has a plurality of flat belt members having a longitudinal extension in the direction of travel of the screen conveyor belt and being arranged parallel to one another. Rod members extend perpendicular to the direction of travel and are spaced from one another in the direction of travel so as to form therebetween openings of the screen conveyor belt. The rod members have a first and a second flat end section and a central operative portion located between the first and second flat end sections. The first and second flat end sections of each one of the rod members are positioned on adjacent ones of the belt members, respectively. Fasteners for connecting the flat end sections to the flat belt members are provided and the fasteners penetrate the flat end sections. A thickness of the flat end sections is greater adjacent to the central operative portion than at the free end of the flat end sections.

Abstract: A conveyor belt for a conveying device has pull-resistant, flexible belt loops extending in a direction of movement of the conveyor belt. Rods having opposed, flat ends are provided with bores. The rods extend perpendicularly to the belt loops and rest with the opposed flat ends on the belt loops. Fasteners for securing the flat ends to the belt loops by penetrating the bores of the flat ends and the belt loops are provided. The flat ends have a leading edge and a following edge in the direction of movement. The leading and the following edges have rounded projections in the area of the bores.

Abstract: A method of producing elastomeric stators for eccentric helical pumps, with the elastomer shrinking after the stator has been produced. To increase the precision of the pump cavity, this cavity is first made larger than desired. The closed metallic annular casing that surrounds the stator on the outside is then reduced in diameter, for example via a die. In so doing, the elastomer is radially compressed to thereby bring the pump cavity to a precise inner dimension that is a function of the reduction of the casing diameter and is hence independent of the shrinkage.