Drilling and/or percussive hammer with no-load operation control
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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Aug 7, 2012
Grant Date -
Jul 1, 2010
app pub date -
Jun 21, 2006
filing date -
Jun 22, 2005
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A drilling and/or percussive hammer comprises a handle and a hammer housing, which can move relative to the handle and inside of which, among other things, a pneumatic spring percussive mechanism is housed. The pneumatic spring of the pneumatic spring percussive mechanism can be ventilated via a no-load operation duct that is opened and closed by a valve. The valve can be opened and closed according to a pressing force acting upon the handle. A delay device controls the valve during closing so that the valve reaches the position corresponding to the detected pressing force only with a time delay. This causes a smooth transition from the no-load operation to the percussive operation.
First Claim
Family

- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
Patent Owner | Address | |
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WACKER NEUSON PRODUKTION GMBH & CO KG | 85084 REICHERTSHOFEN |
International Classification(s)
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
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Berger, Rudolf | Grunwald, DE | 85 | 942 |
# of filed Patents : 85 Total Citations : 942 | |||
Schmid, Wolfgang | Filderstadt, DE | 173 | 1936 |
# of filed Patents : 173 Total Citations : 1936 |
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Maintenance Fees
Fee | Large entity fee | small entity fee | micro entity fee | due date |
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Fee | Large entity fee | small entity fee | micro entity fee |
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Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
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