Impact tool

B - Operations – Transporting – 23 – B

Patent

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Details

B23B 45/16 (2006.01) B25D 9/12 (2006.01) B25D 9/14 (2006.01) B25D 9/20 (2006.01)

Patent

CA 2379291

A hammer (90) is supported in a valving sleeve (82) fixed in an internal passageway (27) of a body (25). The sleeve has a cross wall (81) with an orifice (120) closed and opened by the hammer (90) on one side and a tubular reciprocable valve (60). An annular chamber (58) is formed around the reciprocable valve (60). A piston (51) is mounted in the annular chamber forming a pressurized gas chamber (58) on one side and a high pressure hydraulic oil chamber (75) on the other side. When hydraulic oil is introduced into the oil chamber (75), the reciprocable valve (60) will close the orifice (120) and as the piston (51) moves to compress the gas in the gas chamber (58), it moves the reciprocable valve (60) away from the orifice (120). The high pressure oil discharges against the hammer (90), which strikes a striking tool (102).

Un marteau (90) est soutenu dans un manche (82) de piston fixé sur une voie de passage (27) interne d'un corps (25). Le manche a une paroi transversale (81) dotée d'un orifice (120) fermé et ouvert par le marteau (90) sur un côté et une soupape tubulaire à mouvement alternatif (60). Une chambre annulaire (58) est formée autour de la soupape à mouvement alternatif (60). Un piston (51) est fixé sur la chambre annulaire constituant une chambre à gaz pressurisée (58) sur un côté et une chambre à huile hydraulique à haute pression (75) sur l'autre côté. Lorsque de l'huile hydraulique est introduite dans la chambre à huile (75), la soupape à mouvement alternatif (60) ferme l'orifice (120) et tandis que le piston (51) se déplace pour comprimer le gaz dans la chambre à gaz (58), il déplace la soupape à mouvement alternatif (60) en l'éloignant de l'orifice (120). L'huile à haute pression se décharge contre le marteau (90) qui frappe un outil de frappe (102).

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