Anchoring device for use in masonry and like structures and having protection against deleterious influences

An anchoring device for use in masonry and like structures, comprising a first element adapted to be received and anchored in a hole of a structure, said first element including an expander member having a threaded shaft portion and operative for expanding at least a leading end of said first element;

• a second element having a first turnably-actuated portion located in said hole and being formed with a tapped bore which is threadedly connected with said shaft for moving said expander member in direction generally outwardly of the hole, and a second portion having a part extending outwardly from said hole and having means adapted to carry an object to be mounted on said structure;
• and means for preventing access of corrosion-producing media to said elements, said preventing means being of synthetic plastic material and including an axially-yieldable tubular sleeve portion sealingly surrounding said part of said second element intermediate said expander member and said object, an annular section having a pair of end faces in respective engagement with said first and second elements, said annular section frictionally engaging said shaft portion so as to prevent undesired turning of said first element during movement of said expander member, a tubular extension section sealingly surrounding another part of said second element, and a cap-shaped section sealingly surrounding said first element, all of said sections being of one-piece with each other and preventing access of corrosion-producing media to said elements.