Pneumatic impact breaker

B - Operations – Transporting – 25 – D

Patent

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Details

B25D 17/04 (2006.01) B25D 9/16 (2006.01) B25F 5/02 (2006.01) F01L 25/04 (2006.01)

Patent

CA 2184265

A pneumatic impact breaker which comprises a housing (11) with a rear cylinder head (12), one or two handles (18, 19) and a longitudinal cylinder bore (20), a hammer piston (28) reciprocably guided in the cylinder bore (20), a front portion (55) of the housing (11) including socket means (13, 17) for receiving the rear impact receiving end (15) of a working implement (16), an air distributing valve (26, 27) located in the rear part of the cylinder bore (20) and arranged to direct motive pressure air alternatingly to the opposite ends of the hammer piston (28) to make the latter reciprocate in the cylinder bore (20), and the rear cylinder head (12) comprises a plug extending into the rear end of the cylinder bore (20) and forming an axial support for the air distributing valve (26, 27), whereby two parallel wall portions (29, 30) extend rearwardly from the housing (11) and which together with a transverse wedge bolt (32) form a mounting means for said cylinder head (12) and said handles (18, 19).

Concasseur à percussion pneumatique comprenant un logement (11) accueillant une culasse arrière (12), une ou deux poignées (18, 19) et un alésage de cylindre (20) longitudinal, un piston-marteau (28) à mouvement alternatif guidé à l'intérieur de l'alésage (20), une partie avant (55) du logement (11) comportant des parties femelles d'emboîtement (13, 17) pour accueillir l'extrémité arrière de réception d'impact (15) d'un outil (16), un clapet de distribution d'air (26, 27) situé dans la partie arrière de l'alésage (20) et disposé de façon à diriger l'air comprimé moteur alternativement vers les extrémités opposées du piston-marteau (28) pour donner à celui-ci un mouvement alternatif à l'intérieur de l'alésage (20), la culasse arrière (12) comportant un bouchon qui s'étend dans la partie arrière de l'alésage (20) et qui forme un support axial pour le clapet de distribution d'air (26, 27), au moyen duquel deux parties parois parallèles (29, 30) s'étendent vers l'arrière depuis le logement (11) et forment ensemble, avec un boulon de serrage transversal (32), un organe de montage pour ladite culasse (12) et lesdites poignées (18, 19).

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