Invention Grant
- Patent Title: Working machine with reduced upper mass vibrations
- Patent Title (中): 减轻上质量振动的工作机
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Application No.: US09508356Application Date: 1998-08-25
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Publication No.: US06848858B1Publication Date: 2005-02-01
- Inventor: Martin Greppmair
- Applicant: Martin Greppmair
- Applicant Address: DE Munich
- Assignee: Wacker Construction Equipment AG
- Current Assignee: Wacker Construction Equipment AG
- Current Assignee Address: DE Munich
- Agency: Boyle Fredrickson Newholm Stein & Gratz S.C.
- Priority: DE19739743 19970910
- International Application: PCTEP98/05392 WO 19980825
- International Announcement: WO9913166 WO 19990318
- Main IPC: E01C19/34
- IPC: E01C19/34 ; E02D3/046 ; E02D3/068 ; E01C19/32
Abstract:
According to the invention, a hammer or a ramming machine for compacting soil has a crank mechanism for producing a directed vibration. The crank mechanism is coupled to a spring assembly. The parts of the crank mechanism which move back and forth linearly are made from a material with a density less than that of steel. This construction prevents vibrations which are unpleasant for the person operating the working machine from occurring.
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