Automatic gun receiver combination |
|||||||
| 申请号 | US3566744D | 申请日 | 1969-07-14 | 公开(公告)号 | US3566744A | 公开(公告)日 | 1971-03-02 |
| 申请人 | STONER EUGENE; | 发明人 | STONER EUGENE M; | ||||
| 摘要 | The automatic gun receiver combination includes a recoiling barrel, bolt and bolt carrier, two ammunition feeding means, recoil assembly and buffer assembly. The recoiling barrel reciprocates axially in the receiver forwardly of the ammunition feeding means. A bolt is reciprocated axially past the feeding means by a recoiling bolt carrier. The bolt is also rotated into and out of a position in which it is locked to the barrel. Two cams extend along the length of the bolt carrier to cooperate with cam followers on each of the two ammunition feeding means, either of which may be selected to feed ammunition into the receiver. The recoil assembly is coupled between the barrel and receiver both for buffering recoil and counterrecoil of the barrel and for accelerating the bolt carrier in recoil relative to the barrel. The buffer assembly at the rear of the receiver both buffers the recoil force of the bolt and bolt carrier and mounts a sear, selectively engageable with the bolt carrier, such that when the sear and bolt carrier are engaged, the resulting interruption of the counterrecoil of the bolt and bolt carrier is buffered. | ||||||
| 权利要求 | 1. An automatic gun comprising, in combination: a. a receiver having an ammunition feeding station therein; b. a barrel mounted for reciprocal axial movement in said receiver forward of the amMunition feeding station; c. a bolt disposed in axial alignment with the barrel; d. a bolt carrier adapted to reciprocate longitudinally in said receiver past the feeding station, the bolt carrier having a relatively short portion in line with the bolt and connected thereto and a relatively long portion offset from the bolt, the length of the longer portion exceeding the stroke of the bolt carrier; e. a cam extending along the length of the bolt carrier longer portion; f. ammunition-feeding means attached to the receiver, having a cam follower which cooperates with the cam on the bolt carrier for feeding ammunition to the feeding station; g. recoil means disposed alongside the barrel and operably coupled between the barrel and the receiver for buffering recoil and counterrecoil forces, said recoil means including an accelerator disposed forward of and in alignment with the bolt carrier longer portion and responsive to barrel recoil for engaging the forward end of the bolt carrier longer portion to accelerate the bolt carrier in recoil relative to the barrel; and h. a buffer assembly mounted at the rear of the receiver in alignment with the bolt, and engageable with the rear of the bolt carrier upper portion for buffering the recoil force of the bolt and bolt carrier. 2. An automatic gun in accordance with claim 1 wherein an elongate operating spring extends through the bolt carrier longer portion and is operably connected between a forward part of the bolt carrier longer portion and the rear of the receiver for urging said bolt carrier forward to the battery position. 3. An automatic gun in accordance with claim 2 including a charging system comprising: a. a block mounted for axial movement within the receiver, said block being disposed forward of the bolt carrier longer portion and in line therewith; b. means affixed to the block and extending from the block through the bolt carrier longer portion to the rear of the receiver for moving the block rearwardly to engage the forward end of the bolt carrier longer portion and move the bolt carrier to the rear of the receiver; and c. a charger return spring extending through the bolt carrier longer portion, and operably connected between the rear of the receiver and the block for returning the block to its forward position. 4. An automatic gun in accordance with claim 1 wherein said ammunition-feeding means includes: a. a feed pawl carrier disposed beside the bolt carrier longer portion at the feeding station, said feed pawl carrier being mounted for reciprocation on the receiver; b. feed pawls protruding on the outboard side of the feed pawl carrier for engaging rounds of ammunition to feed them to the feeding station; and c. means mounting the cam follower on the inboard side of the feed pawl carrier to reciprocate the feed pawl carrier responsive to longitudinal reciprocation of the bolt carrier. 5. An automatic gun comprising, in combination: a. a receiver having an ammunition-feeding station therein; b. a barrel mounted for reciprocal axial movement in said receiver forward of the ammunition feeding station; c. a bolt disposed in axial alignment with the barrel; d. a bolt carrier adapted to reciprocate longitudinally in said receiver past the feeding station, the bolt carrier having a relatively short portion in line with the bolt and connected thereto and a relatively long portion offset from the bolt and barrel, the length of the longer portion exceeding the stroke of the bolt carrier; e. a pair of cams on opposite sides of the bolt carrier, each extending along the length of the bolt carrier longer portion; f. ammunition-feeding means attached to the receiver and comprising a pair of ammunition guide trays disposed on opposite sides of the bolt carrier longer portion, an ammunition feed pawl means associated with each of the ammunition guide trays, each feed pawl means being engageable with rounds of ammunition in tHe associated guide trays to feed ammunition therethrough to the ammunition-feeding station, a pair of cam follower means each connected to one of the feed pawl means and cooperable with a respective one of the cams on the bolt carrier to operate the ammunition feed pawl means, and means for selectively feeding ammunition from either of the ammunition guide trays; g. recoil means disposed alongside the barrel and operably coupled between the barrel and the receiver for buffering recoil and counterrecoil forces, said recoil means including an accelerator disposed forward of and in alignment with the bolt carrier longer portion and responsive to barrel recoil for engaging the forward end of the bolt carrier longer portion to accelerate the bolt carrier in recoil relative to the barrel; and h. a buffer assembly mounted at the rear of the receiver in alignment with the bolt, and engageable with the rear of the bolt carrier shorter portion for buffering the recoil force of the bolt and bolt carrier. 6. An automatic gun comprising, in combination: a. a receiver having an ammunition-feeding station therein; b. a barrel mounted for reciprocal axial movement in said receiver forward of the ammunition feeding station; c. a bolt carrier adapted to reciprocate longitudinally in said receiver past the feeding station, the bolt carrier having a relatively short sleeve portion adapted to engage the barrel at the forward end of the bolt carrier stroke, and a relatively long body portion offset from the sleeve portion, said body portion having a sear notch near its rear end and a cam extending along its length; d. a bolt carried by said sleeve portion; e. ammunition-feeding means attached to the receiver, having a cam follower which cooperates with the cam on the bolt carrier to feed ammunition to the feeding station; f. recoil means disposed alongside the barrel and operably coupled between the barrel and the receiver for buffering recoil and counterrecoil forces of the barrel, said recoil means including accelerator means disposed forward of and in alignment with the bolt carrier body portion responsive to barrel recoil for engaging the forward end of the bolt carrier body portion to accelerate the bolt carrier in recoil relative to the barrel; g. a buffer assembly mounted at the rear of the receiver and engageable with the rear of the bolt carrier sleeve portion for buffering the recoil force of the bolt and bolt carrier; and h. a sear assembly at the rear of the receiver, selectively engageable with said sear notch on the bolt carrier body to interrupt the forward stroke of the bolt carrier. 7. An automatic gun in accordance with claim 6 wherein: a. said sear assembly is operably connected to the rear mounted recoil buffer assembly; and b. said buffer assembly includes spring means aligned with the bolt, said spring means being compressible rearwardly for buffering the recoil force of the bolt and bolt carrier, and compressible forwardly for buffering sear forces resulting from interrupting the counterrecoil of the bolt and bolt carrier. 8. An automatic gun in accordance with claim 6 wherein: a. the barrel has locking lugs at its rear end; b. the bolt is mounted for axial and rotative movement in the bolt carrier sleeve portion, and includes locking lugs which pass between the lugs on the barrel when the bolt is in an aligned position and cooperate with the barrel lugs for locking the bolt in battery when the bolt is axially rotated to a locking position; and c. a cam slot in the bolt carrier sleeve portion and a cam follower on the bolt cooperate to rotate the bolt to the aligned position responsive to rearward movement of the bolt carrier relative to the bolt, and to the locking position responsive to relative forward movement of the bolt carrier, said cam slot having a forward and a rearward portion each parallel to the bolt axis, the forward and rearward portions being joined by a centrAl portion oblique to the bolt axis so that the bolt moves axially a limited distance relative to the bolt carrier when the bolt cam follower is in the forward and rearward cam slot portions, and rotates relative to the sleeve portion when the cam follower passes through the central portion of the cam slot. 9. An automatic gun in accordance with claim 8 wherein: a. a crevice pin is mounted for radial movement in the bolt carrier sleeve portion and engageable in a notch in the bolt to fix the bolt in the forward position relative to the bolt carrier; b. an elongate cam within the receiver extends alongside the reciprocal path of the bolt carrier sleeve portion; and c. a cam follower on the crevice pin cooperates with the elongate cam to hold the crevice pin engaged when the bolt is out of battery. 10. An automatic gun in accordance with claim 6 wherein an ejection pin extends through the bolt and bolt carrier sleeve portion and is mounted for axial movement therein for ejecting a cartridge case from the bolt, the rear end of said ejecting pin protruding from the rear of the bolt carrier sleeve portion for engaging the rear recoil buffer assembly during recoil of the bolt carrier, thereby buffering ejection of the cartridge case. 11. An automatic gun comprising, in combination: a. a receiver having an ammunition feeding station therein; b. a barrel mounted for reciprocal axial movement in the receiver forward of the ammunition feeding station; c. a buffer assembly mounted in the receiver in alignment with the barrel and rearward of the ammunition feeding station; d. a bolt disposed in the receiver in axial alignment with the barrel; e. a bolt carrier adapted to reciprocate longitudinally in the receiver and being connected to the bolt for reciprocating the bolt past the ammunition feeding station, the bolt carrier having: a relatively short portion in line with the barrel engageable with the buffer assembly for buffering for the recoil force of the bolt and bolt carrier; a relatively long portion offset from the barrel and exceeding the stroke of the bolt carrier in length, the front part of the offset portion extending alongside the barrel when the bolt carrier is at the forward end of its reciprocation and the rear part of the offset portion extending alongside the buffer assembly when the bolt carrier is at the rear end of its reciprocation; and a cam extending along the length of the bolt carrier offset portion; f. ammunition-feeding means attached to the receiver having a cam follower which cooperates with the cam on the bolt carrier for feeding ammunition to the feeding station; and g. recoil means disposed alongside the barrel and forward of the bolt carrier, operably coupled between the barrel and the receiver for buffering recoil and counterrecoil forces, said recoil means including an accelerator aligned with the bolt carrier offset portion and responsive to barrel recoil for engaging the forward end of the bolt carrier offset portion to accelerate the bolt carrier in recoil relative to the barrel. |
||||||
| 说明书全文 | |||||||
QQ群二维码
意见反馈
意见反馈