IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0993550
(2009-05-20)
|
등록번호 |
US-8550321
(2013-10-08)
|
우선권정보 |
AU-2008902501 (2008-05-21); AU-2008903770 (2008-07-23) |
국제출원번호 |
PCT/AU2009/000629
(2009-05-20)
|
§371/§102 date |
20101119
(20101119)
|
국제공개번호 |
WO2009/140728
(2009-11-26)
|
발명자
/ 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
Winthrop & Weinstine, P.A.
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
5 |
초록
▼
A hand-held power tool powered by a gas combustion mechanism comprising a first combustion chamber, a second chamber within a driving cylinder having aft and fore ends. The first combustion chamber in fluid communication with the second chamber via the aft end, a fan assembly, a driver assembly havi
A hand-held power tool powered by a gas combustion mechanism comprising a first combustion chamber, a second chamber within a driving cylinder having aft and fore ends. The first combustion chamber in fluid communication with the second chamber via the aft end, a fan assembly, a driver assembly having a piston and driver movable therewithin between the aft and fore end, and a drive motor operably connected to the driver assembly. In use, whilst the piston is at or near the fore end of the driving cylinder, the fan assembly introduces air into the chambers thereby at least partially pressuring the air there within, fuel gas is introduced into the combustion chamber to form an air/fuel gas mixture therein, the drive motor operably moves the piston to a position at or near the aft end thereby compressing the air/fuel gas mixture within the combustion chamber so that the air/fuel mixture is ignited to impart motion onto the and to facilitate the operation of the tool.
대표청구항
▼
1. A hand-held power tool, the operational power of which is provided by a gas combustion mechanism, said gas combustion mechanism comprising a first combustion chamber, a second chamber within a driving cylinder having an aft end and a fore end, said first combustion chamber in fluid communication
1. A hand-held power tool, the operational power of which is provided by a gas combustion mechanism, said gas combustion mechanism comprising a first combustion chamber, a second chamber within a driving cylinder having an aft end and a fore end, said first combustion chamber in fluid communication with said second chamber via said aft end, at least one fan assembly, a driver assembly having a piston and driver movable within said driving cylinder between said aft end and said fore end, and a drive motor operably connected to said driver assembly, wherein in use, whilst said piston is at or near said fore end of said driving cylinder, said fan assembly introduces air into said first combustion chamber and said second chamber thereby at least partially pressuring the air there within, fuel gas is introduced into said combustion chamber from a fuel supply port, the air and fuel gas being mixed to form an air/fuel gas mixture therein, said drive motor operably moves said piston to a position at or near said aft end thereby compressing said air/fuel gas mixture within said first combustion chamber so that said air/fuel mixture is ignited within the combustion chamber to impart motion onto said piston and to facilitate the operation of the tool. 2. A hand-held power tool as claimed in claim 1, wherein said fan assembly has an external induction fan for introducing air into said first combustion chamber. 3. A hand-held power tool as claimed in claim 1, wherein said fan assembly has an internal circulation fan disposed within said first combustion chamber. 4. A hand-held power tool as claimed in claim 3, wherein said internal circulation fan is shrouded by a shroud having a free end portion that is frusto-conical in shape. 5. A hand-held power tool as claimed in claim 1, wherein said first combustion chamber is frusto-conically shaped in a region near where it adjoins said driving cylinder. 6. A hand-held power tool as claimed in claim 1, wherein said piston has an aft surface having a concave toroidal shape therein for redirecting air centrally forced thereon by said fan assembly. 7. A hand-held power tool as claimed in claim 1, wherein a separate exhaust cavity is at least partially disposed externally around said first combustion chamber and said driving cylinder, said exhaust cavity having an exhaust vent located near the fore end of said driving cylinder. 8. A hand-held power tool as claimed in claim 7, wherein a plurality of apertures interconnect said exhaust cavity with said first combustion chamber, and an air ducting shroud disposed near said apertures prevents air from passing there through when air is being introduced into said combustion chamber by said fan assembly. 9. A hand-held power tool as claimed in claim 7, wherein at least one exhaust port in communication with said exhaust cavity is located in said driving cylinder near its aft end, said exhaust port being closed by said piston when said piston has travelled to said aft end of said driving cylinder. 10. A hand-held power tool as claimed in claim 9, wherein said exhaust port closes to allow supercharged air to be introduced into said combustion chamber. 11. A hand-held power tool as claimed in claim 1, wherein said tool further comprises a movable tool nose assembly and a trigger assembly both operably connected to an electronic control module for the control and actuation of the fan assembly, drive motor and fuel supply port. 12. A hand-held power tool as claimed in claim 1, wherein said fan assembly and said drive motor are operably powered by a battery. 13. A hand-held power tool as claimed in claim 12, wherein said drive motor is adapted to act as a generator operably connected to an electronic control module for charging of said battery. 14. A hand-held power tool as claimed in claim 1, wherein said air/fuel mixture is ignited by an ignition process initiated by multiple high tension sparks. 15. A hand-held power tool as claimed in claim 14, wherein said multiple high tension sparks are emitted from a plurality of igniters. 16. A hand held power tool as in claim 1, wherein the air is introduced into the combustion chamber and driver by a turbine/fan compressor. 17. A hand held power tool as in claim 1, wherein the air is introduced into the combustion chamber and driver by a positive displacement rotary vane compressor. 18. A hand held power tool as in claim 1, wherein the air introduced into the combustion chamber and driver is super-charged and a holding mechanism holds the driver assembly against super-charged air until ignition takes place. 19. A hand held power tool as in claim 1 wherein an increase in tool energy is a result of supercharging. 20. A hand-held power tool, the operational power of which is provided by a gas combustion mechanism, said gas combustion mechanism comprising a first combustion chamber, and a second chamber within a driving cylinder having an aft end and a fore end, said first combustion chamber in fluid communication with said second chamber via said aft end, and a driver assembly having a piston and driver movable within said driving cylinder between said aft end and said fore end, and a drive motor operably connected to said driver assembly, wherein in use the volume of said first combustion chamber and said second chamber is fluidally pressurized in first and second stages, where said first stage comprises introducing supercharged air into said first combustion chamber and said second chamber via a fan whilst said piston is at or near said fore end of said driving cylinder and subsequently a fuel gas is introduced into said combustion chamber from a fuel supply port, the air and fuel gas being mixed to form an air/fuel gas mixture therein, and in said second stage said drive motor moves said piston to said aft end thereby compressing said fuel/gas mixture in said first combustion chamber so that said air/fuel mixture is ignited within the combustion chamber to impart motion onto said piston and to facilitate the operation of the tool.
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