Pile-driving hammer
AssigneeVan Kooten B.V.
InventorHans Gunther Schnell
Life of this patent
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Abstract
A pile-driving hammer comprises a hammer cylinder, a piston accomodated in said hammer cylinder in sealing relationship with a sliding face of the hammer cylinder and means for supplying lubricant to said sliding face which consists of a lining of wear-resistant material. The pile driving hammer has a long lifetime, since cavities are provided in the lining distributed along the surface of the sliding face. In this hammer the lubricant is retained in the cavities.
Claims9
A pile-driving hammer comprising a hammer cylinder having an inner sliding face, a piston received within said hammer cylinder in sealing relationship with said sliding face of the hammer cylinder and means for supplying a lubricant to said sliding face comprising a lining formed of wear-resistant material on said sliding face of the hammer cylinder having a plurality of recessed cavities formed therein distributed along the surface of said sliding face.
The method of treating the sliding face of a hammer cylinder in a pile driving hammer which comprises the steps of placing a lining on said hammer cylinder;
- galvanically removing lining material from the lining of said cylinder to form cavities therein, and covering said lining with a cover layer having apertures therein located in alignment with the cavities in the lining whereby said cavities and holes will distribute lubricating fluid along said cylinder and a piston received therein.
Dependencies are inferred from the claim text.