EP 0426928 A1 19910515 - Method to automatically adjust the functional parameters of a percussion apparatus.
Title (en)
Method to automatically adjust the functional parameters of a percussion apparatus.
Title (de)
Verfahren zum automatischen Anpassen der Funktionsparameter eines Schlagapparates.
Title (fr)
Procédé pour ajuster automatiquement des paramètres de fonction d'un appareil à percussion.
Publication
Application
Priority
EP 89830451 A 19891018
Abstract (en)
The device exploits the striking mass rebound energy, which depends on the hardness of the material on which the tool operates. It is based on the functioning of the device as in the European Patent No. 0085279, and in providing adequate means to vary the distributor stroke during the piston upward-moving phase, as to anticipate or to postpone the percussion phase when the tool operates respectively on a less or more hard material. In this first case, the anticipation of the percussion stroke causes a decrease in the volume of the cylindrical chamber where the pressurized oil works and therefore, under the same power, it causes an increase in the blows frequency, if the working oil flow mantains unaltered.
IPC 1-7
IPC 8 full level
B25D 9/26 (2006.01)
CPC (source: EP)
B25D 9/26 (2013.01)
Citation (search report)
- [AD] EP 0085279 A1 19830810 - VITULANO MAURO
- [A] EP 0256955 A1 19880224 - MONTABERT ETS [FR]
- [AD] FR 2509217 A1 19830114 - MONTABERT ETS [FR]
Designated contracting state (EPC)
AT BE CH DE ES FR GB GR IT LI LU NL SE
DOCDB simple family (publication)
EP 0426928 A1 19910515; EP 0426928 B1 19970625; AT E154774 T1 19970715; DE 68928143 D1 19970731; DE 68928143 T2 19971211; ES 2103711 T3 19971001
DOCDB simple family (application)
EP 89830451 A 19891018; AT 89830451 T 19891018; DE 68928143 T 19891018; ES 89830451 T 19891018