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US 2004/0016154 A1Published application
Bit striking apparatus for use in an excavator
OwnerByung Duk Liminventor
Life of this patent
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Abstract
Disclosed is a bit striking apparatus in an excavator capable of efficiently striking the entire area of the hammer bit under uniform pressure without exerting excessive load to the excavator so that the hammer bit may be free from damage owing to local concentration of striking force of the piston.
Claims4
A bit striking apparatus in an excavator comprising:
- a back head having a central inlet through which air is introduced under a predetermined value of pressure;
- a check valve located under the inlet of the back head) for preventing backflow of introduced air to the inlet (92) of the back head;
- a sleeve tube for being hermetically coupled by an upper inner periphery with a lower end of the back head) and slidably coupled by a lower inner periphery with a hammer bit (70) which is fixed by a chuck;
- a piston (50) located over the hammer bit (70) within the sleeve tube which is moved up and down within the sleeve tube owing to distribution of air pressure by an air distributor to strike down the hammer bit);
- and
- the air distributor located between the back head and the piston within the sleeve tube for adequately distributing air so that the piston can be vertically moved to strike the hammer bit,
3 more elements
Dependencies are inferred from the claim text.