Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Da Costa Julio Antonio SalgadofiledCriticalDa Costa Julio Antonio Salgado
Priority to PT10200097ApriorityCriticalpatent/PT102000A/en
Publication of PT102000ApublicationCriticalpatent/PT102000A/en
The cutter 1 is applied to the grinder via its central hole. The support base 2 of the grinder is fixed to the latter by means of a bracket 5 and by an adjustable screw 6. The base 2 has a slot 3 for passage of the toothed wheel 1 and, further, rolling support points 4 for sliding more easily over the walls. This invention can be used to open apertures in walls for the installation of pipes. <IMAGE>
PT10200097A1997-04-281997-04-28System for opening apertures in walls for the passage of pipes
PT102000A
(en)