Injection means
AssigneeSundsvalls Manchetten AB
InventorKnut Nordvall
Life of this patent
Estimating the term…
Abstract
A device for injecting concrete, plastic or the like into cracks in a concrete structure, a rock face or the like comprises an elastic, radially expandable and substantially tubular body adapted to be securely and sealingly engaged within a bore hole in communication with the cracks. The body has a first end portion with a non-return valve to be introduced deepest into the bore hole and a second end portion adapted to be connected to a feed pipe for the material to be injected. The elastic body is formed as an integral unit and is adapted to expand into engagement with the bore hole before the non-return valve opens at a predetermined pressure to inject the material into the bore hole.
Claims9
A device for injecting a material, such as concrete and plastic, in a flowable state into cracks in a concrete structure, a rock face, and the like, said device comprising a substantially tubular, integral, elastic body adapted to be secured within a bore hole in communication with the cracks, said body having an inlet end portion adapted to be connected to a feed pipe for the material to be injected, an outlet end portion having non-return valve means associated therewith which opens at a predetermined pressure, and a radially expandable intermediate portion joining said inlet end portion and said outlet end portion, said intermediate portion defining an internal flow path from said inlet end portion to said outlet end portion such that fluid flowing from said inlet end portion to said outlet end portion flows in contact with an inner wall of said intermediate portion, said intermediate portion being constructed to expand under pressure of said material and thereby secure said body within the bore hole before said non-return valve means opens to inject said material into the bore hole.
Dependencies are inferred from the claim text.