IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0608608
(2009-10-29)
|
등록번호 |
US-8118203
(2012-02-21)
|
우선권정보 |
TW-98207118 U (2009-04-28) |
발명자
/ 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
6 |
초록
▼
A hammer-drive powder-actuated tool includes a hollow tool body extending along a front-to-rear direction, and a firing device disposed within a rear end portion of the tool body. The firing device includes a pin holder having a through hole extending along the front-to-rear direction, and a firing
A hammer-drive powder-actuated tool includes a hollow tool body extending along a front-to-rear direction, and a firing device disposed within a rear end portion of the tool body. The firing device includes a pin holder having a through hole extending along the front-to-rear direction, and a firing pin movable forwardly and rearwardly relative to the pin holder. The pin has a firing end portion that is disposed at a front end thereof and that extends into the through hole in the pin holder, and a central axis aligned with that of a rimfire cartridge along the front-to-rear direction. A front end of the firing end portion of the firing pin has a diameter larger than the inner diameter of the annular primer and smaller than the outer diameter of the annular primer.
대표청구항
▼
1. A hammer-drive powder-actuated tool adapted for activating ignition of a rimfire cartridge, the rimfire cartridge having a rear end and an annular primer disposed at the rear end of the rimfire cartridge, said tool comprising: a hollow tool body extending along a front-to-rear direction; anda fir
1. A hammer-drive powder-actuated tool adapted for activating ignition of a rimfire cartridge, the rimfire cartridge having a rear end and an annular primer disposed at the rear end of the rimfire cartridge, said tool comprising: a hollow tool body extending along a front-to-rear direction; anda firing device disposed within a rear end portion of said tool body and including: a pin holder having a through hole extending along the front-to-rear direction,a firing pin movable forwardly and rearwardly relative to said pin holder and having a firing end portion that is disposed at a front end thereof and that extends into said through hold in said pin holder, and a central axis adapted to be aligned with that of said rimfire cartridge along the front-to-rear direction, a front end of said firing end portion of said firing pin having a diameter adapted to be larger than an inner diameter of the annular primer and smaller than an outer diameter of the annular primer, andwherein said through hole in said pin holder has a front hole section, said front hole section having a front distal end, a rear distal end, and a diameter that reduces gradually from said front distal end to said rear distal end so that said front hole section has a minimum diameter at said rear distal end, the minimum diameter of said front hole section being adapted to be smaller than the minimum diameter of the rear end of the rimfire cartridge. 2. The hammer-drive powder-actuated tool as claimed in claim 1, wherein said front hole section of said through hole in said pin holder further has a maximum diameter at said front distal end, which is adapted to be slightly larger than that of the rear end of the rimfire cartridge. 3. The hammer-drive powder-actuated tool as claimed in claim 2, wherein said firing end portion of said firing pin has a large-diameter section and a small-diameter section disposed in front of said large-diameter section, having a diameter smaller than that of said large-diameter section, and adapted to be movable into contact with the annular primer of the rimfire cartridge. 4. The hammer-drive powder-actuated tool as claimed in claim 3, wherein said through hole in said pin holder further has a small-diameter hole section disposed behind and connected to said front hole section and having a diameter the same as that of said rear distal end of said front hole section and smaller than the diameter of said large-diameter section of said firing end portion of said firing pin, and a large-diameter hole section disposed behind and connected to said small-diameter hole section and having a diameter larger than that of said small-diameter hole section, said large-diameter section of said firing pin being disposed within said large-diameter hole section of said through hole in said pin holder, said small-diameter section of said firing end portion of said firing pin being disposed within said large-diameter and small-diameter hole sections of said through hole in said pin holder. 5. The hammer-drive powder-actuated tool as claimed in claim 4, wherein: said firing pin further has a rod portion disposed behind and formed integrally with said firing end portion and extending along the front-to-rear direction, a head disposed behind and formed integrally with said rod portion and adapted to permit application of an external force thereto, and a shoulder defined between said firing end portion and said rod portion; andsaid firing device further includes: a retaining member sleeved on said rod portion of said firing pin, anda resilient member disposed between said retaining member and said head of said firing pin and adapted for biasing said firing pin to move rearwardly away from the rimfire cartridge to allow said firing end portion of said firing pin to be spaced apart from the rear end of the rimfire cartridge by a predetermined distance when no external force is applied to said firing pin. 6. The hammer-drive powder-actuated tool as claimed in claim 5, wherein said resilient member is configured as a coiled compression spring. 7. The hammer-drive powder-actuated tool as claimed in claim 5, wherein said firing device further includes a rigid washer sleeved on said rod portion of said firing pin between said retaining member and said resilient member. 8. The hammer-drive powder-actuated tool as claimed in claim 7, wherein: said tool body includes a tubular portion having a rear end portion, and a grip portion having a front end portion sleeved fixedly on said rear end portion of said tubular portion, said tubular portion having a first stop flange extending radially and inwardly from an intermediate portion of said tubular portion, and a second stop flange extending radially and inwardly from a rear end of said tubular portion;said pin holder has a small-diameter holder portion and a large-diameter holder portion disposed behind and connected to said small-diameter holder portion and having an outer diameter larger than that of said small-diameter holder portion, said large-diameter holder portion having a front end surface abutting against said first stop flange of said tool body, and a rear end surface abutting against said retaining member; andsaid washer has a front side surface abutting against said retaining member, and a rear side surface abutting against said second stop flange of said tool body;whereby, said pin holder, said washer, and said retaining member are fixed within said tool body. 9. The hammer-drive powder-actuated tool as claimed in claim 5, wherein said tool body has an annular inner wall surface, and said retaining member is generally U-shaped. 10. The hammer-drive powder-actuated tool as claimed in claim 9, wherein said retaining member is configured as a generally U-shaped plate. 11. The hammer-drive powder-actuated tool as claimed in claim 1, wherein said front hole section of said through hole in said pin holder further has a maximum diameter at said front distal end, which is adapted to be equal to that of the rear end of the rimfire cartridge.
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