The pneumatic hammer includes a hollow housing with handles for the user. A pneumatic driver is mounted inside the housing with an air tank for pressurized air. A reciprocating hammer assembly is slidably mounted inside the pneumatic driver and includes a hammer with a sharp hammer tip. The hammer i
The pneumatic hammer includes a hollow housing with handles for the user. A pneumatic driver is mounted inside the housing with an air tank for pressurized air. A reciprocating hammer assembly is slidably mounted inside the pneumatic driver and includes a hammer with a sharp hammer tip. The hammer is substantially hollow to efficiently capture released air from the air tank and drive the same. An alignment collar extends out of the housing and couples to the hammer assembly to set alignment of the hammer against an object to be impacted. The collar is normally locked in place. A control assembly is coupled to the housing, the pneumatic driver, and the collar to selectively release air driving the hammer out of the housing and unlock the collar for slidable movement into the housing.
대표청구항▼
1. A pneumatic hammer, comprising: an elongate, hollow housing, the housing having at least one handle extending outwardly therefrom;a pneumatic driver disposed inside said housing, the pneumatic driver having an air tank adapted to be filled with pressurized gas;a hammer assembly mounted inside the
1. A pneumatic hammer, comprising: an elongate, hollow housing, the housing having at least one handle extending outwardly therefrom;a pneumatic driver disposed inside said housing, the pneumatic driver having an air tank adapted to be filled with pressurized gas;a hammer assembly mounted inside the pneumatic driver, the hammer assembly having a hollow reciprocating hammer with a sharp hammer tip, the pneumatic driver having at least one pipe coupled to the hammer assembly to selectively drive the hammer, the hammer adapted to extend out of the housing to impact against an object and retract into the housing;a reciprocating alignment collar coupled to the hammer assembly at one end of the housing, the alignment collar aligning placement of the pneumatic hammer against the object to be impacted by the hammer; anda control assembly coupled to the housing to selectively drive the hammer;whereby selective release of the gas against the hammer builds back pressure to quickly drive the hammer against the object and break the same. 2. The pneumatic hammer according to claim 1, wherein said housing comprises: an elongate hollow cylinder having a gauge opening and a valve opening at one end, the valve opening being in communication with a relief valve;a pressure gauge mounted to said gauge opening; anda hammer opening formed at the opposite end, said hammer selectively extending through said hammer opening during activation by said control assembly, said collar being coupled to said hammer assembly through said hammer opening. 3. The pneumatic hammer according to claim 2, wherein said at least one handle comprises a pair of spaced, diametrically opposed handles. 4. The pneumatic hammer according to claim 2, wherein: said at least one pipe has an elongate connector pipe coupled to said pressure gauge and said hammer assembly and a pair of spaced elbow pipes extending from one end of said air tank, each elbow pipe being coupled to said connector pipe;a flapper valve is pivotally mounted inside said connector pipe, said flapper valve being selectively pivotable between a normally closed position and an open position by said control assembly; anda valve stem extending from one end of said air tank, the valve stem having a relief valve accessible through said valve opening for selective refilling of said air tank and relief of excess pressure. 5. The pneumatic hammer according to claim 4, wherein said control assembly comprises a selectively actuatable button disposed on said at least one handle, a valve control unit coupled to said flapper valve inside said connector pipe, and a control line extending from said button to said valve control unit; whereby selective actuation of said button opens said flapper valve to expel gas from said air tank into said hammer assembly to drive said hammer. 6. The pneumatic hammer according to claim 5, wherein said air tank comprises a hollow inner chamber for said hammer assembly. 7. The pneumatic hammer according to claim 4, wherein said hammer assembly comprises: a substantially circular endcap at one end of said air tank, said endcap having a connector hub coupled to said connector pipe, said connector hub having a bore extending completely through said endcap to form an air passage with said connector pipe;an elongate sleeve coupled to said endcap, said sleeve having outer threads at one end for mounting said sleeve to said endcap, at least one vent hole adjacent said outer threads to vent excess gas during operation, and an annular ledge at the opposite end of said sleeve, said annular ledge extending inwardly;a spring slidably mounted around said sleeve, said spring having one end abutting said endcap;said hammer slidably mounted inside said sleeve, said hammer being in communication with the air passage in said endcap to capture gas being expelled therethrough and propel said hammer during operation; anda hammer spring slidably mounted around said hammer, one end thereof abutting against a portion of said hammer, said hammer spring biasing said hammer to a normal ready position abutting said endcap. 8. The pneumatic hammer according to claim 7, wherein said hammer comprises an elongate hollow stem section having a diameter, a substantially dome-shaped hollow head section extending coaxially contiguous with said stem section, said head section having a diameter smaller than the diameter of the hollow stem to form an annular ledge, and said hammer tip extending coaxially from said head section. 9. The pneumatic hammer according to claim 8, wherein said control assembly comprises a selectively actuatable button disposed on said at least one handle, a lock control module coupled to said button, a lock release unit coupled to said alignment collar, said alignment collar having one end coupled to said sleeve and abutting the end of said hammer spring, and a control line extending from said lock control module to said lock release unit, wherein selective actuation of said button unlocks said alignment collar to facilitate slidable movement of said alignment collar into said housing against the bias of said hammer spring. 10. The pneumatic hammer according to claim 8, wherein said hammer tip is constructed from hardened steel. 11. The pneumatic hammer according to claim 1, wherein said hammer tip is constructed from hardened steel.
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이 특허에 인용된 특허 (8)
Shinma Yasutoshi,JPX, Hammer drill with an idling strike prevention mechanism.
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