Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
88 words
A tube (10) for pneumatic transport of wearing material, for example crushed glass, sand, dolomite or basalt, said tube consisting of an outer casing (12) which at the inside is covered with a wearing layer (14), characterized in that the wearing layer (14) includes a cast composition comprising crush glass and binder, in which composition one or more electrical lines (16) are moulded said lines being connectable to a corresponding signal line having indicating means to enable indication of breaks of electrical lines at a predetermined tube wearing.
Claim 2
Dependent Claim
88 words
A tube (10) for pneumatic transport of wearing material, for example crushed glass, sand, dolomite or basalt, said tube consisting of an outer casing (12) which at the inside is covered with a wearing layer (14), characterized in that the wearing layer (14) includes a cast composition comprising crush glass and binder, in which composition one or more electrical lines (16) are moulded said lines being connectable to a corresponding signal line having indicating means to enable indication of breaks of electrical lines at a predetermined tube wearing.
Claim 3
Dependent Claim
25 words
A tube according to claim 1, characterized in that said electrical line or lines (16) extend essentially in the longitudinal direction of the tube (10).
Claim 4
Dependent Claim
33 words
A tube according to claim 1 or 2, characterized in that said electrical line or lines (16) are moulded in the wearing layer (14) closer to the outside thereof and to the inside.
Claim 5
Dependent Claim
33 words
A tube according to any of claims 1 - 3, characterized in that the fractional size in respect to the crush glass of the wearing layer (14) preferably amounts 2 - 10 mm.
Claim 6
Dependent Claim
32 words
A tube according to any of claims 1 - 4, characterized in that the proportion of volume between the crush glass of the wearing layer (14) and the binder is approximately 2:1.
Claim 7
Dependent Claim
96 words
A tube system intended for pneumatic transport of wearing material, for example crushed glass, sand, dolomite or basalt, in which system is included several tubes (20, 22, 24, 26, 28, 30, 32) according to any of claims 1 - 5, characterized in that the electrical lines of all tubes are connected to a common indicating means (18) including indicators (20', 22', 24', 26', 28', 30', 32') corresponding to the separate tubes a.nd having the form of light diodes or the like for indicating and identifying breaks of electrcial line or lines in corresponding tube or tubes.