US20160209139A1 - Drive Mechanism for Launcher - Google Patents
Drive Mechanism for Launcher Download PDFInfo
- Publication number
- US20160209139A1 US20160209139A1 US14/996,369 US201614996369A US2016209139A1 US 20160209139 A1 US20160209139 A1 US 20160209139A1 US 201614996369 A US201614996369 A US 201614996369A US 2016209139 A1 US2016209139 A1 US 2016209139A1
- Authority
- US
- United States
- Prior art keywords
- drive shaft
- magazine
- groove
- grooves
- detent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
- F41A9/00—Feeding or loading of ammunition; Magazines; Guiding means for the extracting of cartridges
- F41A9/38—Loading arrangements, i.e. for bringing the ammunition into the firing position
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
- F41A9/00—Feeding or loading of ammunition; Magazines; Guiding means for the extracting of cartridges
- F41A9/61—Magazines
- F41A9/64—Magazines for unbelted ammunition
- F41A9/73—Drum magazines
- F41A9/74—Drum magazines with radially disposed cartridges
Definitions
- This invention relates to a launcher of the type used to launch less lethal projectiles such as tear gas and markers. Some launchers of this type have a rotary magazine that holds several projectiles. This invention relates to a drive mechanism for rotating the magazine between shots to bring the next projectile into firing position.
- FIG. 1 is a perspective view, partially cut away, of a launcher that is a first embodiment of the invention, including a drive mechanism in accordance with the present invention
- FIG. 2 is a sectional view through a portion of the drive mechanism of the launcher of FIG. 1 , taken generally along line 2 - 2 of FIG. 1 ;
- FIG. 3 is an elevational view of a portion of a drive shaft, showing sets of grooves on the exterior surface of the drive shaft;
- FIG. 4 is another elevational view of the portion of a drive shaft, rotated about its axis, and showing schematically a detent in several different operational positions with respect to the drive shaft;
- FIG. 5 is an illustration of a portion of a drive shaft that is part of a drive mechanism that is a second embodiment of the invention.
- FIG. 1 is a pictorial illustration of a launcher 10 including a drive mechanism 12 that is a first embodiment of the invention.
- the general configuration and structure of the launcher 10 other than the drive mechanism 12 of the invention, is known.
- the launcher 10 includes a stock 20 , a grip 22 , a trigger 24 , and a frame 26 that supports those parts. Together, those parts form what is herein referred to, for convenience, as a “base” 28 of the launcher 10 .
- the launcher 10 also includes a magazine 30 and a barrel 34 .
- the magazine 30 is supported on the base 28 for rotation relative to the base about an axis 32 .
- the magazine 30 has a plurality of chambers 33 .
- the number of chambers 33 may vary, depending on the particular launcher 10 .
- the magazine has four chambers 33 .
- Each chamber 33 is adapted to receive a cartridge (not shown) that includes a projectile.
- the magazine 30 is rotatable about the axis 32 to and through a number of index positions.
- the barrel 34 is supported on the base 28 and projects forward (to the left as viewed in FIG. 1 ) from the base and the magazine 30 .
- the barrel 34 is aligned with the uppermost chamber 33 in the magazine 30 when the magazine is in one of its index positions.
- the launcher 10 includes a known firing mechanism for actuating the particular cartridge that is in the uppermost chamber 33 , when the trigger 24 is pulled, to cause the projectile that is part of that cartridge to be propelled from the barrel 34 .
- the drive mechanism 12 is operable as described below to rotate the magazine 30 to and through its several index positions.
- the drive mechanism 12 includes as its two main components a drive shaft 40 and a detent or détente member 60 .
- the drive shaft 40 is an elongate, generally cylindrical element that is supported on the body for rotation about the axis 32 .
- the drive shaft 40 projects forward under the barrel 34 .
- the rearward or inner end portion of the drive shaft 40 is fixed for rotation with the magazine 30 .
- Two support shafts 62 extend parallel to the barrel 34 , on opposite sides of the drive shaft 40 .
- the support shafts 62 are fixed to the frame of the launcher 10 .
- the support shafts 62 support a saddle 66 for sliding movement along the support shafts 62 , in a direction parallel to the axis 32 .
- the saddle 66 encircles and helps to support the drive shaft 40 .
- the saddle 66 is slidable axially along the support shafts 62 and the drive shaft 40 .
- the saddle 66 carries the detent 60 in a manner and location so that the detent engages the drive shaft 40 .
- a spring or other biasing member 67 is located between the saddle 66 and the detent 60 , and biases the detent into engagement with the derive shaft 40 .
- the engagement of the detent 60 with the drive shaft 40 causes the drive shaft to rotate about the axis 32 , thus rotating (indexing) the magazine 30 as desired.
- the drive shaft 40 has a grooved portion 42 that extends for a portion of the length of the drive shaft 40 and that is engaged by the detent.
- the grooved portion 42 has a number of groove sets 44 on its outer surface.
- the number of groove sets 44 is equal to the number of chambers 33 in the magazine 30 .
- the drive shaft 40 has four groove sets 44 .
- Each groove set 44 includes a rotating groove 46 and a return groove 48 .
- the rotating groove 46 is helical in configuration, that is, it extends for the length of the grooved portion 42 but wraps partially (in this case, ninety degrees) around the circumference of the drive shaft 40 .
- the return groove 48 is straight, that is, it extends along the length of the grooved portion 42 of the drive shaft 40 , without wrapping around the circumference of the drive shaft.
- the rotating grooves 46 and the return grooves 48 intersect each other at their forward ends, and also intersect each other at their back ends (closer to the magazine 30 ). Specifically, at each forward intersection, the depth of the grooves 46 and 48 increases, to form a front indent 50 in the surface of the drive shaft 40 that is deeper than the depth of the grooves. Similarly, at each back intersection, the depth of the grooves 46 and 48 increases, to form a back indent 52 in the surface of the drive shaft 40 that is deeper than the depth of the grooves.
- FIG. 4 illustrates schematically illustrates the engagement of the detent 60 and the drive shaft 40 during operation of the drive mechanism 12 .
- the drive mechanism 12 is in what is referred to herein as a “start” position.
- the saddle 66 is all the way forward along the drive shaft 40 and the support shafts 62 .
- the detent 60 is located in one of the front indents 50 , at the forward end of both a rotating groove 46 and a return groove 48 .
- the engagement of the detent 60 in the front indent 50 is sufficient to hold the parts of the drive mechanism 12 in this position, with one of the chambers 33 of the magazine 30 thus being held in an index position.
- the detent 60 When the saddle 66 is moved (pulled) back toward the magazine 30 , the detent 60 is forced out of the front indent 50 , moving radially outward against the bias of the spring 67 , and into the rotating groove 46 as indicated by the circle 63 .
- the edge of the return groove 48 at the forward indent, and the edge of the rotating groove 46 at the forward indent, are configured to ensure that the detent 60 moves rearward into the rotating groove 46 and not into the return groove 48 .
- the saddle 66 As the saddle 66 continues to move rearward, it moves in a direction parallel to the axis 32 . Because the saddle 66 and the detent 60 are blocked from rotation by the support shafts 62 , the engagement of the detent 60 with the helical rotating groove 46 causes the detent 60 to exert a rotational force on the drive shaft 40 , rotating the drive shaft 40 as the saddle moves back. As the drive shaft 40 rotates, so also does the magazine 30 , which is fixed for rotation with the drive shaft 40 .
- the saddle 66 is then moved (pushed) forward, out of the back indent 52 , in a direction away from the magazine 30 .
- the detent 60 is forced out of the back indent 52 , radially outward against the bias of spring 67 , into the return groove 48 as indicated by the circle 65 .
- the edge of the return groove 48 at the back indent 52 , and the edge of the rotating groove 46 at the back intent, are configured to ensure that the detent 60 moves into the return groove and cannot back track into the rotating groove.
- Action of the drive mechanism 12 can be reversed if desired. That is, the groove sets 44 can be positioned and oriented on the drive shaft 40 so that a forward movement of the saddle 66 causes rotation of the drive shaft, with the detent 60 traveling along a rotating groove 46 , in which case a rearward movement of the saddle would result in the detent traveling along a return groove 48 .
- This configuration might be desired in some cases to deal with the effects of launcher recoil, or for other reasons.
- the drive shaft has two grooved portions, back to back.
- This embodiment is illustrated in FIG. 5 .
- a drive shaft 40 a has two grooved portions 42 a and 42 b.
- the grooved portions 42 a and 42 b are oriented the same as each other.
- the grooved portions 42 a and 42 b are engaged by two detents (not shown) on a saddle that may be longer to accommodate the spacing of the two detents, which may be in the range of, for example, three to four inches.
- the use of two detents and two grooved portions means that rotational (driving) force is spread over a larger surface area, thus reducing the possibility of skipping or other detrimental effects.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Toys (AREA)
Abstract
Description
- This invention relates to a launcher of the type used to launch less lethal projectiles such as tear gas and markers. Some launchers of this type have a rotary magazine that holds several projectiles. This invention relates to a drive mechanism for rotating the magazine between shots to bring the next projectile into firing position.
-
FIG. 1 is a perspective view, partially cut away, of a launcher that is a first embodiment of the invention, including a drive mechanism in accordance with the present invention; -
FIG. 2 is a sectional view through a portion of the drive mechanism of the launcher ofFIG. 1 , taken generally along line 2-2 ofFIG. 1 ; -
FIG. 3 is an elevational view of a portion of a drive shaft, showing sets of grooves on the exterior surface of the drive shaft; -
FIG. 4 is another elevational view of the portion of a drive shaft, rotated about its axis, and showing schematically a detent in several different operational positions with respect to the drive shaft; and -
FIG. 5 is an illustration of a portion of a drive shaft that is part of a drive mechanism that is a second embodiment of the invention. -
FIG. 1 is a pictorial illustration of alauncher 10 including adrive mechanism 12 that is a first embodiment of the invention. The general configuration and structure of thelauncher 10, other than thedrive mechanism 12 of the invention, is known. Thelauncher 10 includes astock 20, agrip 22, atrigger 24, and aframe 26 that supports those parts. Together, those parts form what is herein referred to, for convenience, as a “base” 28 of thelauncher 10. Thelauncher 10 also includes amagazine 30 and abarrel 34. - The
magazine 30 is supported on thebase 28 for rotation relative to the base about anaxis 32. Themagazine 30 has a plurality ofchambers 33. The number ofchambers 33 may vary, depending on theparticular launcher 10. In the illustrated embodiment, the magazine has fourchambers 33. Eachchamber 33 is adapted to receive a cartridge (not shown) that includes a projectile. Themagazine 30 is rotatable about theaxis 32 to and through a number of index positions. - The
barrel 34 is supported on thebase 28 and projects forward (to the left as viewed inFIG. 1 ) from the base and themagazine 30. Thebarrel 34 is aligned with theuppermost chamber 33 in themagazine 30 when the magazine is in one of its index positions. Thelauncher 10 includes a known firing mechanism for actuating the particular cartridge that is in theuppermost chamber 33, when thetrigger 24 is pulled, to cause the projectile that is part of that cartridge to be propelled from thebarrel 34. - The
drive mechanism 12 is operable as described below to rotate themagazine 30 to and through its several index positions. Thedrive mechanism 12 includes as its two main components adrive shaft 40 and a detent ordétente member 60. - The
drive shaft 40, decribed below in more detail, is an elongate, generally cylindrical element that is supported on the body for rotation about theaxis 32. Thedrive shaft 40 projects forward under thebarrel 34. The rearward or inner end portion of thedrive shaft 40 is fixed for rotation with themagazine 30. - Two
support shafts 62 extend parallel to thebarrel 34, on opposite sides of thedrive shaft 40. Thesupport shafts 62 are fixed to the frame of thelauncher 10. Thesupport shafts 62 support asaddle 66 for sliding movement along thesupport shafts 62, in a direction parallel to theaxis 32. Thesaddle 66 encircles and helps to support thedrive shaft 40. Thesaddle 66 is slidable axially along thesupport shafts 62 and thedrive shaft 40. - The
saddle 66 carries the detent 60 in a manner and location so that the detent engages thedrive shaft 40. A spring orother biasing member 67 is located between thesaddle 66 and the detent 60, and biases the detent into engagement with thederive shaft 40. As described below, when thesaddle 66 is moved (slid back and forth) along the length of thedrive shaft 40, the engagement of the detent 60 with thedrive shaft 40 causes the drive shaft to rotate about theaxis 32, thus rotating (indexing) themagazine 30 as desired. - The
drive shaft 40 has agrooved portion 42 that extends for a portion of the length of thedrive shaft 40 and that is engaged by the detent. Thegrooved portion 42 has a number ofgroove sets 44 on its outer surface. The number ofgroove sets 44 is equal to the number ofchambers 33 in themagazine 30. Thus, in the illustrated embodiment, thedrive shaft 40 has fourgroove sets 44. - Each groove set 44 includes a
rotating groove 46 and areturn groove 48. The rotatinggroove 46 is helical in configuration, that is, it extends for the length of thegrooved portion 42 but wraps partially (in this case, ninety degrees) around the circumference of thedrive shaft 40. Thereturn groove 48 is straight, that is, it extends along the length of thegrooved portion 42 of thedrive shaft 40, without wrapping around the circumference of the drive shaft. - The
rotating grooves 46 and thereturn grooves 48 intersect each other at their forward ends, and also intersect each other at their back ends (closer to the magazine 30). Specifically, at each forward intersection, the depth of thegrooves front indent 50 in the surface of thedrive shaft 40 that is deeper than the depth of the grooves. Similarly, at each back intersection, the depth of thegrooves back indent 52 in the surface of thedrive shaft 40 that is deeper than the depth of the grooves. -
FIG. 4 illustrates schematically illustrates the engagement of the detent 60 and thedrive shaft 40 during operation of thedrive mechanism 12. When the detent is in the position indicated by thecircle 61, thedrive mechanism 12 is in what is referred to herein as a “start” position. Thesaddle 66 is all the way forward along thedrive shaft 40 and thesupport shafts 62. The detent 60 is located in one of thefront indents 50, at the forward end of both a rotatinggroove 46 and areturn groove 48. The engagement of the detent 60 in thefront indent 50 is sufficient to hold the parts of thedrive mechanism 12 in this position, with one of thechambers 33 of themagazine 30 thus being held in an index position. - When the
saddle 66 is moved (pulled) back toward themagazine 30, the detent 60 is forced out of thefront indent 50, moving radially outward against the bias of thespring 67, and into therotating groove 46 as indicated by thecircle 63. The edge of thereturn groove 48 at the forward indent, and the edge of therotating groove 46 at the forward indent, are configured to ensure that the detent 60 moves rearward into therotating groove 46 and not into thereturn groove 48. - As the
saddle 66 continues to move rearward, it moves in a direction parallel to theaxis 32. Because thesaddle 66 and thedetent 60 are blocked from rotation by thesupport shafts 62, the engagement of the detent 60 with the helical rotatinggroove 46 causes the detent 60 to exert a rotational force on thedrive shaft 40, rotating thedrive shaft 40 as the saddle moves back. As thedrive shaft 40 rotates, so also does themagazine 30, which is fixed for rotation with thedrive shaft 40. - When the
saddle 66 reaches its full rearward position, the force of thespring 67 causes the detent 60 to move radially inward into theback indent 52 at the back end of therotating groove 46, as indicated by thecircle 64. Thedrive shaft 40 ceases rotation. Themagazine 30 also ceases rotation. Themagazine 30 is at its next index position. - The
saddle 66 is then moved (pushed) forward, out of the back indent 52, in a direction away from themagazine 30. The detent 60 is forced out of theback indent 52, radially outward against the bias ofspring 67, into thereturn groove 48 as indicated by thecircle 65. The edge of thereturn groove 48 at theback indent 52, and the edge of therotating groove 46 at the back intent, are configured to ensure that the detent 60 moves into the return groove and cannot back track into the rotating groove. - As the
saddle 66 continues to move forward, because thereturn groove 48 extends parallel to theaxis 32, no rotational force is exerted on thedrive shaft 40. Therefore, themagazine 30 does not rotate out of its previously attained index position. When thesaddle 66 reaches its full forward position, the force of thespring 67 causes thedetent 60 to move into thefront indent 50 at the front end of the return groove 48 (which is also front end of the next rotating groove 46). Thus, the cycle is complete and thedrive mechanism 12 is again in the start position, ready to rotate themagazine 30 again. - Action of the
drive mechanism 12 can be reversed if desired. That is, the groove sets 44 can be positioned and oriented on thedrive shaft 40 so that a forward movement of thesaddle 66 causes rotation of the drive shaft, with thedetent 60 traveling along a rotatinggroove 46, in which case a rearward movement of the saddle would result in the detent traveling along areturn groove 48. This configuration might be desired in some cases to deal with the effects of launcher recoil, or for other reasons. - In a second embodiment, the drive shaft has two grooved portions, back to back. This embodiment is illustrated in
FIG. 5 . Specifically, a drive shaft 40 a has two groovedportions 42 a and 42 b. Thegrooved portions 42 a and 42 b are oriented the same as each other. Thegrooved portions 42 a and 42 b are engaged by two detents (not shown) on a saddle that may be longer to accommodate the spacing of the two detents, which may be in the range of, for example, three to four inches. The use of two detents and two grooved portions means that rotational (driving) force is spread over a larger surface area, thus reducing the possibility of skipping or other detrimental effects. - From the foregoing description of the invention, those skilled in the art will perceive improvements, changes and modifications. For example, alternative electrical circuitry can be used so long as it provides the same result. Such improvements, changes and modifications within the skill of the art are intended to be covered by the appended claims.
Claims (8)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/996,369 US20160209139A1 (en) | 2015-01-16 | 2016-01-15 | Drive Mechanism for Launcher |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201562104301P | 2015-01-16 | 2015-01-16 | |
US14/996,369 US20160209139A1 (en) | 2015-01-16 | 2016-01-15 | Drive Mechanism for Launcher |
Publications (1)
Publication Number | Publication Date |
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US20160209139A1 true US20160209139A1 (en) | 2016-07-21 |
Family
ID=56406431
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14/996,369 Abandoned US20160209139A1 (en) | 2015-01-16 | 2016-01-15 | Drive Mechanism for Launcher |
Country Status (2)
Country | Link |
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US (1) | US20160209139A1 (en) |
WO (1) | WO2016115429A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115127388A (en) * | 2022-05-10 | 2022-09-30 | 北京机械设备研究所 | Automatic loading and throwing device and method based on linear motor |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0445397A (en) * | 1990-06-12 | 1992-02-14 | Shigeru Sendai | S, c type neumatic type bullet chamber |
US20040020093A1 (en) * | 2002-03-14 | 2004-02-05 | Jeffrey Hajjar | System and method for increased magazine capacity for a firearm |
US20060101692A1 (en) * | 2004-11-16 | 2006-05-18 | Patrick Falenwolfe | Firearm operating mechanism and cartridge cylinder assembly |
US20080121096A1 (en) * | 2002-03-14 | 2008-05-29 | Jeffrey Hajjar | System and method for loading and feeding a shotgun |
US20160169615A1 (en) * | 2013-07-09 | 2016-06-16 | Rory Berger | Projectile Delivery System With Variable Velocity Control |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1404040A (en) * | 1920-01-26 | 1922-01-17 | Harold H Luce | Repeating rifle |
US2155512A (en) * | 1937-09-09 | 1939-04-25 | Western Cartridge Co | Pump-action firearm |
US2832165A (en) * | 1955-08-25 | 1958-04-29 | Jessie T Ivy | Bolt turning attachment for rifle |
US5119575A (en) * | 1990-10-22 | 1992-06-09 | Gajdica Michael S | Rotary magazine for firearms |
US5416999A (en) * | 1993-09-24 | 1995-05-23 | Coury; William S. | Delta weapon system (DWS) |
US6481137B2 (en) * | 2000-12-26 | 2002-11-19 | Johann Franz Kornberger | Revolving firearm |
-
2016
- 2016-01-15 WO PCT/US2016/013543 patent/WO2016115429A1/en active Application Filing
- 2016-01-15 US US14/996,369 patent/US20160209139A1/en not_active Abandoned
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0445397A (en) * | 1990-06-12 | 1992-02-14 | Shigeru Sendai | S, c type neumatic type bullet chamber |
US20040020093A1 (en) * | 2002-03-14 | 2004-02-05 | Jeffrey Hajjar | System and method for increased magazine capacity for a firearm |
US20080121096A1 (en) * | 2002-03-14 | 2008-05-29 | Jeffrey Hajjar | System and method for loading and feeding a shotgun |
US20060101692A1 (en) * | 2004-11-16 | 2006-05-18 | Patrick Falenwolfe | Firearm operating mechanism and cartridge cylinder assembly |
US20160169615A1 (en) * | 2013-07-09 | 2016-06-16 | Rory Berger | Projectile Delivery System With Variable Velocity Control |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115127388A (en) * | 2022-05-10 | 2022-09-30 | 北京机械设备研究所 | Automatic loading and throwing device and method based on linear motor |
Also Published As
Publication number | Publication date |
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WO2016115429A1 (en) | 2016-07-21 |
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