Hydraulic hammer having a sealing bushing

Details Hydraulic hammer having a sealing bushing Hydraulic hammer having a sealing bushing

2006-12-26

2006-12-26

Rada, Rinaldi I. (Department: 3721)

Tool driving or impacting

Drive controlled by relative axial movement of tool

Drive motor controlled

C173S014000, C173S200000, C173S128000, C173S091000

Reexamination Certificate

active

07152692

ABSTRACT:
A hydraulic hammer having a sealing bushing includes a percussion piston that delivers strokes to a tool. A lower part of the percussion piston is sealed with respect to a frame by the sealing bushing, which includes one or more lower seals. The sealing bushing does not contribute to the bearing of the percussion piston and it is arranged in place through the lower end of the hydraulic hammer.

REFERENCES:
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patent: 6510904 (2003-01-01), Tyrrell
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patent: 2596681 (1987-10-01), None
Finnish Official Action for Finnish Priority Application No. 20040156.

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