US3748959A - Breech block buffer - Google Patents

Breech block buffer Download PDF

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Publication number
US3748959A
US3748959A US00142609A US3748959DA US3748959A US 3748959 A US3748959 A US 3748959A US 00142609 A US00142609 A US 00142609A US 3748959D A US3748959D A US 3748959DA US 3748959 A US3748959 A US 3748959A
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US
United States
Prior art keywords
breech block
buffer
bore
striker pin
buffer member
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.)
Expired - Lifetime
Application number
US00142609A
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English (en)
Inventor
T Moller
D Ketterer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Heckler und Koch GmbH
Original Assignee
Heckler und Koch GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Heckler und Koch GmbH filed Critical Heckler und Koch GmbH
Application granted granted Critical
Publication of US3748959A publication Critical patent/US3748959A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F41A3/00—Breech mechanisms, e.g. locks
    • F41A3/64—Mounting of breech-blocks; Accessories for breech-blocks or breech-block mountings
    • F41A3/78—Bolt buffer or recuperator means
    • F41A3/82—Coil spring buffers

Definitions

  • the buffer spring encloses a stn'ker 1 0 l pin the end of which is exposed in the slot and adapted References Cited fwoeraggiratron by a hammer for Initiating firing of the UNITED STATES PATENTS 2,900,877 8/1959 McClenahan 89/198 3 Chin, 3 9mm! 8" t if /Z J m I 1;
  • the invention relates to automatic firearms, especially a breech block for automatic firearms such as an automatic rifle with a shock absorber device which comprises a buffer spring arranged in a bore of the breech block member and a buffer member guided and held in the bore, resting against the buffer spring and projecting out of the rear end of the breech block.
  • the invention is directed to the problem of avoiding this disadvantage of the known breech block with a buffer device and so to construct the buffer device that the length of the breech block need not be substantially increased for installation thereof.
  • the buffer member is held by a slider which is inserted in the breech block transversely to the direction of movement of the buffer member and traverses a slot in the buffer member.
  • Such slider has no greater space requirement in the longitudinal direction of the breech than the head at the end of the pin with the known breech block so that the additional space which is required with the known breech block for the screw thread for screwing in the pin is completely saved by the invention.
  • the invention permits the use of a buffer device in the breech block even if insufficient space is available for a buffer device such as is provided with the known breech block.
  • the buffer device is supported by a pin which substantially completely fills the space surrounded by the spring. It is therefore necessary to provide a special bore for this buffer device which must be provided parallel to the bore required for the striker pin. Therefore the known arrangement is only applicable where the crosssectional dimensions of the breech block are sufficiently great to permit such parallel bores.
  • the invention permits the buffer spring to be ar ranged in the same bore as the striker pin so that it surrounds the striker pin. The invention therefore permits a buffer device to be included in the breech block even if the cross-sectional dimensions thereof are relatively small and nevertheless a bore of substantial size is to be provided for the buffer device which permits the mounting of a powerful buffer spring.
  • the striker pin is loaded in known manner by a coil compression spring which tends to hold the striker pin in a rear position
  • the rear end of the striker pin engages a bore in the slider in this rear position and thereby retains the slider in a simple way in its position of use.
  • This embodiment of the invention is also particularly appropriate in cases in which the breech block is intended for firearms with hammer firing since then the rear end of the striker pin traverses the slider and can then be accessible for the hammer.
  • the slot in the buffer member can be open to the rear so that the end of the buffer member projecting from the breech block forms a notch surrounding the rear end of the striker pin.
  • the hammer can then engage in the open end of the fork on striking the rear end of the striker pin.
  • FIG. 1 is a longitudinal section through the breech block carrier and the rear portion of the breech block head of a breech block according to the invention
  • FIG. 2 is a section on the line II-ll through the rear portion of the breech according to FIG. 1,
  • FIG. 3 is a view of the breech according to FIG. 1 in the direction of the arrow III.
  • the breech shown in the drawing consists of a breech carrier 1 and a breech head 2, which are connected together by means of a control member 3 engaging in the breech block carrier l and in the breech block head 2. Moreover a pawl serves to secure the breech block carrier ii and the breech block head 2 together.
  • the breech block carrier 1 embodies a rearwardly open longitudinal bore 11 in which two coil compression springs 12 and 13 are inserted axially one behind the other and the turns of which bear on the inner wall of the bore Ill.
  • the forward coil compression spring 12 rests at one end face 14 at the end of the bore Ill while the end of the second coil compression spring 13 remote from the spring 12 bears on a buffer member 15 which is inserted in the outer end of the bore Ill and embodies a projection 16 engaging concentrically in the second coil spring 13.
  • the rear end of the buffer member 13 projecting out of the breech block carrier I is provided with a longitudinal slot 17 which extends nearly to the rear end of the rear coil compression spring 13 so that the rear end of the buffer member forms a fork 18.
  • the buffer member 15 is held in the breech block by a slider member 19 which is inserted perpendicularly to the axis of the ion gitudinal bore ill and thus perpendicularly to the direction of movement of the buffer member 15 in a corre sponding groove 20 of the breech block carrier l.
  • the striker pin 21 is arranged in the longitudinal bore ill as well as the coil compression springs I2 and i3 and the buffer member 115. Its forward end traverses a corresponding bore in the control member 3 while its rear end engages a corresponding bore in the buffer member 15 and also traverses a bore in the slider 19 by means of an extension pin 22 of reduced diameter.
  • the striker pin 21 is loaded by means of a coiled compression spring 23 arranged concentrically on it which bears on the one hand at the rear end of the control member 3 and on the other hand against a shoulder 24 which is arranged about the center of the striker pin 21 and therefore tends to press the striker pin 21 rearwardly and thereby to hold the extension pin 22 in the bore of the slider 19.
  • the slider member 19 is locked by means of the striker pin 21 in the groove 20 of the breech block carrier 1. Furthermore, the rear end 22 of the striker pin 21 is accessible to a hammer in the longitudinal slot 17 of the buffer member so that the breech block, shown as one constructional example, is suitable for automatic weapons with hammer firing.
  • a breech block with a built-in shock absorber device is provided in which practically no additional space is required for the buffer device and which is, moreover, particularly simple to produce and assemble.
  • the breech block is to be taken apart for servicing it is sufficient to depress the striker pin so far rearwardly into the breech block carrier 1 by means of a pin or the like until the slider member 19 is freed and then can be withdrawn from the breech block carrier.
  • the buffer device with the buffer member 15 the buffer springs 12 and 13 and the braking rings 25 released but also the striker pin 21 with the coil spring 23 loading it can be withdrawn from the breech block.
  • the invention is applicable to all types of breech-breech block arrangements especially also inertia breech blocks with closure firing.
  • Breech block for automatic firearms comprising a buffer spring arranged in a bore of the breech block, the buffer spring surrounding a striker pin, a buffer member guided and held in the bore, said buffer member being supported against the buffer spring and projecting from the rear end of the breech block, a slider member is inserted into the breech block transversely to the direction of movement of the buffer member and traversing a slot in the buffer member, said slider member being in bearing engagement with the breech block.
  • Breech block according to claim 1 characterised in that the striker pin is loaded by means of a coiled compression spring which tends to hold the striker pin in a rearward position and that the rear end of the striker pin engages in this rearward position in a bore of the slider member.
  • Breech block according to claim 1 characterised in that a longitudinal slot in the buffer member is rearwardly open so that the end of the buffer member projecting from the breech block forms a fork surrounding the rear end of the striker pin.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Vibration Dampers (AREA)
  • Binders And Loading Units For Sheaves (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Toys (AREA)
  • Branch Pipes, Bends, And The Like (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
US00142609A 1970-05-15 1971-05-12 Breech block buffer Expired - Lifetime US3748959A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2023816A DE2023816C3 (de) 1970-05-15 1970-05-15 Verschluß für automatische Feuerwaffen mit Hahnschlagzündung

Publications (1)

Publication Number Publication Date
US3748959A true US3748959A (en) 1973-07-31

Family

ID=5771203

Family Applications (1)

Application Number Title Priority Date Filing Date
US00142609A Expired - Lifetime US3748959A (en) 1970-05-15 1971-05-12 Breech block buffer

Country Status (10)

Country Link
US (1) US3748959A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AT (1) AT310616B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
BE (1) BE767150A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CH (1) CH525457A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE2023816C3 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
ES (1) ES195904Y (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR2091488A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB1334005A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
IL (1) IL36846A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
NO (1) NO129111B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4398448A (en) * 1981-07-31 1983-08-16 The United States Of America As Represented By The Secretary Of The Army Buffered bolt assembly
US5060555A (en) * 1990-03-30 1991-10-29 Smith & Wesson Corp. Slide decelerator for a firearm
US20080120887A1 (en) * 2004-10-12 2008-05-29 Vito De Gregorio Hunting and Sporting Firearm
US9103611B2 (en) 2012-08-08 2015-08-11 Nemo Arms, Inc. Compressible bolt carrier extension system
US10330407B2 (en) * 2015-10-16 2019-06-25 Tokyo Marui Co, Ltd. Bolt stop buffer device in gun

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4398448A (en) * 1981-07-31 1983-08-16 The United States Of America As Represented By The Secretary Of The Army Buffered bolt assembly
US5060555A (en) * 1990-03-30 1991-10-29 Smith & Wesson Corp. Slide decelerator for a firearm
US20080120887A1 (en) * 2004-10-12 2008-05-29 Vito De Gregorio Hunting and Sporting Firearm
US9103611B2 (en) 2012-08-08 2015-08-11 Nemo Arms, Inc. Compressible bolt carrier extension system
US9322604B2 (en) 2012-08-08 2016-04-26 Daniel R. Neitzling Bolt carrier system
US10458732B2 (en) 2012-08-08 2019-10-29 Nemo Arms, Inc. Bolt carrier system
US10563938B1 (en) 2012-08-08 2020-02-18 Nemo Arms, Inc. Bolt carrier system
US10928148B2 (en) 2012-08-08 2021-02-23 Nemo Arms, Inc. Bolt carrier system
US10330407B2 (en) * 2015-10-16 2019-06-25 Tokyo Marui Co, Ltd. Bolt stop buffer device in gun

Also Published As

Publication number Publication date
ES195904U (es) 1975-02-16
AT310616B (de) 1973-10-10
ES195904Y (es) 1975-07-16
FR2091488A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1972-01-14
DE2023816A1 (de) 1971-11-25
DE2023816C3 (de) 1975-10-02
GB1334005A (en) 1973-10-17
DE2023816B2 (de) 1975-02-13
NO129111B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1974-02-25
IL36846A (en) 1975-02-10
CH525457A (de) 1972-07-15
BE767150A (fr) 1971-10-01
IL36846A0 (en) 1971-07-28

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