IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0489998
(2002-09-16)
|
우선권정보 |
GB-0123637.1(2001-09-24) |
국제출원번호 |
PCT/GB02/004176
(2002-09-16)
|
§371/§102 date |
20040318
(20040318)
|
국제공개번호 |
WO03/027603
(2003-04-03)
|
발명자
/ 주소 |
- Tilling,John
- Smith,Stephen George Gladwell
- Sutton,Peter
- Sutton,Stephen Richard
|
출원인 / 주소 |
|
대리인 / 주소 |
McDonnell Boehnen Hulbert &
|
인용정보 |
피인용 횟수 :
3 인용 특허 :
6 |
초록
▼
The invention provides a self-aligning device for aiding the engagement of a munition into a rifled gun barrel on loading of the munition, absent the use of a driving band, as, for example, in the case of a munition which is fitted with aerodynamic tail fins. The device comprises at least one annula
The invention provides a self-aligning device for aiding the engagement of a munition into a rifled gun barrel on loading of the munition, absent the use of a driving band, as, for example, in the case of a munition which is fitted with aerodynamic tail fins. The device comprises at least one annular ring to surround the munition, and which, if desired, can be seated on a surface of the munition which allows the ring(s) to rotate. One or more of the rings has a number of elements which are capable of lying within the outline of the ring or rings to allow the munition to be readily loaded into a gun barrel but which can take the form of projections extending radially outwards from the ring(s) when they become coincident with the internal rifling of the gun barrel on further movement of the munition along with barrel or when the munition is rotated. The projections then engage in the rifling grooves and provide a sealing effect. Advantageously, one or more rings is/are designed to override one of the other rings when pressure is applied to the device on gun firing so as to cause the device to engage more tightly with the inner surface of the gun barrel and so providing an obturating effect.
대표청구항
▼
The invention claimed is: 1. A self-aligning device for aiding the engagement of munition into a rifled gun barrel on loading of said munition, which device comprises at least one annular ring dimensioned for location on said munition and having an external diameter corresponding substantially to t
The invention claimed is: 1. A self-aligning device for aiding the engagement of munition into a rifled gun barrel on loading of said munition, which device comprises at least one annular ring dimensioned for location on said munition and having an external diameter corresponding substantially to the gun bore diameter, and a plurality of elements, dimensioned to be capable of providing a substantially close fit with the rifling grooves of the barrel, disposed on said ring or on at least one of said rings around the circumference thereof, wherein each of the said elements is able to adopt a non-extended position with respect to the said ring so as to permit ready loading of the munition into the barrel, but is biased towards a radially extended position in which it will engage with a corresponding rifling groove on further movement of the munition along the barrel wherein said elements are located within and are slidable between the radially extended and non-extended positions along inclined channels formed within the outer surface of said at least one annular ring. 2. A device as claimed in claim 1 wherein said channels are directed substantially axially with respect to said ring. 3. A device as claimed in claim 1 wherein said elements are each individually movable between the extended and non-extended position. 4. A device as claimed in claim 1 wherein there are two annular rings, a first ring carrying said elements and a second ring, co-operative with and biased towards the first, having channels into which respective elements of said first ring are located. 5. A device as claimed in claim 1 wherein the radially inner surface of each element is of larger dimension than its outer surface and the respective channel is correspondingly shaped so as positively to retain the element within said channel. 6. A device as claimed in claim 1 wherein the bias is provided by a spring, an elastic material or compressible material. 7. A device as claimed in claim 3 wherein the bias is provided by a length of elastic material which is anchored at each end in one of a pair of adjacently disposed elements and is otherwise attached to the ring. 8. A device as claimed in claim 1 wherein said elements are elongate and disposed at an angle to the axis of the ring which corresponds to the helical arrangement of the rifling grooves. 9. A device as claimed in claim 1 which is dimensioned to be accommodated at the front end of the munition. 10. A device as claimed in claim 1 which is dimensioned to be accommodated on the munition in the region of a parallel or tapered portion towards the rearward end thereof and to act as an obturating device. 11. A device for obturating a munition in a rifled gun barrel which device comprises at least one annular ring dimensioned for location on said munition in the region of a parallel or tapered portion towards the rearward end thereof, said at lest one annular ring having an external diameter corresponding substantially to the gun bore diameter, and disposed on said ring or on at least one of said rings around the circumference thereof, a plurality of elements dimensioned to be capable of providing a substantially close fit with the rifling grooves of the barrel, characterised in that each of said elements is able to adopt a non-extended position with respect to the said ring so as to permit ready loading of the munition into the barrel, but is biased towards a radially extended position in which it will engage with a corresponding rifling groove on further movement of the munition along the barrel wherein said elements are located within and are slidable between the radially extended and non-extended positions along inclined channels formed within the outer surface of said at least one annular ring. 12. A device for obturating a munition in a rifled gun barrel which comprises two annular rings dimensioned for location on said munition in the region of a parallel or tapered portion towards the rearward end thereof and biased towards each other, said annular rings both having an external diameter corresponding substantially to the gun bore diameter, one of said rings having disposed around its circumference a plurality of axially-extending projections and the second ring being provided with corresponding channels in which said projections are located, the surfaces of said channels being included outwardly along their length towards the front of said munition when said device is placed thereon, and the rings being arranged to move in use from a separated to a less separated relation such that, as the rings move into closer relationship, the projections on the second ring are forced radially outwardly by virtue of the inclination of the surfaces of the channels on the first ring, said projections being dimensioned so as to then engage closely with rifling grooves of the gun barrel. 13. A device as claimed in claim 10 and provided with at least one further ring over which, in use of the device, one at least of the at least one annular rings will override so as to provide a more effective seal between said device and said gun barrel. 14. A device as claimed in claim 13 wherein there are three rings in total. 15. A device as claimed in claim 1 wherein the at least one annular ring is rotatable on the munition. 16. A device as claimed in claim 1 wherein the at least one annular ring is fixed on the munition. 17. A munition fitted with the device of claim 1. 18. A munition as claimed in claim 17 wherein said munition comprises a low friction surface in the region of contact with said self-aligning device. 19. A munition as claimed in claim 18 wherein said low friction surface comprises at least one of steel, aluminium and polytetrafluorethylene (PTFE). 20. A munition as claimed in claim 17 and further provided with means to lubricate the surface of the munition in the region of contact with the device. 21. A method of loading a munition into a rifled gun barrel which comprises fitting the munition with a device according to claim 1 and then loading the munition by pushing it along the barrel until elements on the device become fully located into the rifling grooves of the barrel. 22. A method of loading a munition into a rifled gun barrel which comprises fitting the munition with a device according to claim 1 and then loading the munition into the gun by pushing it along the barrel until there is resistance to such motion, rotating the munition until elements on the device become located into the rifling grooves of the barrel and further pushing the munition until the said elements are fully located into said rifling grooves. 23. A device as claimed in claim 11 and provided with at least one further ring over which, in use of the device, one at least of the at least one annular rings will override so as to provide a more effective seal between said device and said gun barrel. 24. A device as claimed in claim 12 and provided with at least one further ring over which, in use of the device, one at least of the at least one annular rings will override so as to provide a more effective seal between said device and said gun barrel. 25. a device as claimed in claim 23 wherein there are three rings in total. 26. A device as claimed in claim 24 wherein there are three rings in total. 27. A device as claimed in claim 11 wherein the at least one annular ring is rotatable on the munition. 28. A device as claimed in claim 12 wherein the at least one annular ring is rotatable on the munition. 29. A device as claimed in claim 11 wherein the at least one annular ring is fixed on the munition. 30. A device as claimed in claim 12 wherein the at least one annular ring is fixed on the munition. 31. A munition fitted with the device of claim 11. 32. A munition as claimed in claim 31 wherein said munition comprises a low friction surface in the region of contact with said self-aligning device. 33. A munition as claimed in claim 32 wherein said low friction surface comprises at least one of steel, aluminium and polytetrafluorethylene (PTFE). 34. A munition as claimed in claim 31 and further provided with means to lubricate the surface of the munition in the region of contact with the device. 35. A munition fitted with the device of claim 12. 36. A munition as claimed in claim 35 wherein a low friction surface in the region of contact with the device. 37. A munition as claimed in claim 36 wherein the low friction surface comprises steel, aluminium, PTFE or Karon. 38. A munition as claimed in claim 35 and further provided with means to lubricate the surface of the munition in the region of contact with the device. 39. A method of loading a munition into a rifled gun barrel which comprises fitting the munition with a device according to claim 11 and then loading the munition by pushing it along the barrel until elements on the device become fully located into the rifling grooves of the barrel. 40. A method of loading a munition into a rifled gun barrel which comprises fitting the munition with a device according to claim 12 and then loading the munition by pushing it along the barrel until elements on the device become fully located into the rifling grooves of the barrel. 41. A method of loading a munition into a rifled gun barrel which comprises fitting the munition with a device according to claim 11 and then loading the munition into the gun by pushing it along the barrel until there is resistance to such motion, rotating the munition until elements on the device become located into the rifling grooves of the barrel and further pushing the munition until the said elements are fully located into said rifling grooves. 42. A method of loading a munition into a rifled gun barrel which comprises fitting the munition with a device according to claim 12 and then loading the munition into the gun by pushing it along the barrel until there is resistance to such motion, rotating the munition until elements on the device become located into the rifling grooves of the barrel and further pushing the munition until the said elements are fully located into said rifling grooves.
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