EP0130253B1 - Boîte de culasse et son procédé de fabrication - Google Patents

Boîte de culasse et son procédé de fabrication Download PDF

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Publication number
EP0130253B1
EP0130253B1 EP83304997A EP83304997A EP0130253B1 EP 0130253 B1 EP0130253 B1 EP 0130253B1 EP 83304997 A EP83304997 A EP 83304997A EP 83304997 A EP83304997 A EP 83304997A EP 0130253 B1 EP0130253 B1 EP 0130253B1
Authority
EP
European Patent Office
Prior art keywords
receiver
bolt
rearward
broach
rearward portion
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
Application number
EP83304997A
Other languages
German (de)
English (en)
Other versions
EP0130253A2 (fr
EP0130253A3 (en
Inventor
William Batterman Ruger
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.)
Sturm Ruger and Co Inc
Original Assignee
Sturm Ruger and Co Inc
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 Sturm Ruger and Co Inc filed Critical Sturm Ruger and Co Inc
Publication of EP0130253A2 publication Critical patent/EP0130253A2/fr
Publication of EP0130253A3 publication Critical patent/EP0130253A3/en
Application granted granted Critical
Publication of EP0130253B1 publication Critical patent/EP0130253B1/fr
Expired 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
    • F41A3/66—Breech housings or frames; Receivers

Definitions

  • This invention relates to receivers used in rifles which receivers have seating surfaces against which bolt lugs are positioned and to the method of manufacture of the receiver with such seating surfaces wherein the preamble of claims 1 and 3 is based on US-A-1924692.
  • the present invention overcomes weaknesses of the prior art by providing an improved receiver and method of manufacture.
  • a receiver for a bolt action firearm having a barrel, a bolt with lugs a stock, a receiver housing having a forward portion adapted to engage the barrel, a rearward portion adapted to engage the stock and hollow breech portion between said forward and rearward portions characterised in that there is provided; two seat surfaces on the rearward receiver portions for mating with spaced lugs on the bolt, said seat surfaces being formed by a single stroke of a broach cutting means.
  • a method of manufacture of a receiver for a bolt action firearm comprising a rearward position with a breech opening adjacent thereto characterised in that the method includes the steps of:-
  • the invention concerns the formation of a receiver having forward, breech opening and rearward portions with two spaced bolt lugs seats positioned on the rearward portion so that they can be readily formed by the simple broaching operation.
  • the broach is passed through the breech opening to machine the lug seats.
  • the lug seats may afterforming g lie in a plane perpendicular to the bore of the rifle barrel.
  • the receiver blank can be cast with a controlled amount of metal material in the areas adjacent the seats to be formed such that the seats can be formed in a single stroke of a broaching tool.
  • rifle 10 includes barrel 11, receiver 12, breech bolt assembly 13, bolt 14, bolt handle 16, bolt head sleeve 17 and cocking piece 19. Also shown are stock 21 and tang 22.
  • Receiver 12 includes forward portion 23, rearward portion 24 and a hollow breech portion 26.
  • Bolt 14 carries upper bolt lug 27 and lower bolt lug 28.
  • Forward receiver portion 24 has upper lug seat 27a and lower lug seat 28a.
  • Bolt lugs 27 and 28 engage receiver lug seats 27a and 28a when the bolt is in its closed position (Fig. 1).
  • Figs. 3 and 4 the method of manufacture of receiver lug seats 27a and 28a is shown in which a broach 35 is positioned in breech opening 30.
  • the receiver blank is formed by investment casting, forging or other method. Portions of the receiver blank are then finished by machining, grinding or otherwise as known in the art.
  • the forward areas 31, 32 of the rearward portion 24 are partially removed by machining to provide the desired location of surfaces 27a and 28a.
  • the receiver blank includes metal material in the forward areas 31, 32 of the rearward receiver portion 24 so that metal removed from area 31, 32 by machining provides surface seats 27a, 28a of proper area and location within acceptable tolerances.
  • the method of manufacture provides that the volume of metal material in areas 31,32 preferably does not exceed that which can be machined by one stroke of a broach tool. By controlling the amount of metal in areas 31, 32 seats 27a, 28a can be formed in one broach stroke.
  • broach tool 35 has broach teeth 36 which machine metal from the forward areas 31, 32 as broach 35 is moved downwardly (see arrow in Fig. 4).
  • Broach 35 carries sufficient teeth of selected size, length and angle such that the machining of forward areas 31, 32 to form seat surfaces 27a and 28a is accomplished in one downward stroke.
  • Broach 35 is preferably positioned to move perpendicularly to the axis of the barrel or a line parallel thereto (see centre line C/L of Fig. 4). With broach 35 so oriented during its machining stroke, seat surfaces 27a and 28a will be in the same plane and each seat surface equidistant from the end of the barrel 11.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Milling, Broaching, Filing, Reaming, And Others (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Confectionery (AREA)
  • Forging (AREA)
  • Cutting Tools, Boring Holders, And Turrets (AREA)
  • Dowels (AREA)

Claims (4)

1. Boîte de culasse pour une arme à feu à culasse mobile comportant un canon (11), une culasse (14) avec des bossages de référence (27, 28), un fût (21), une boîte de culasse présontant une partie avant (23) conçue pour venir en prise avec le canon (11), une partie arrière (24) conçue pour venir en prise avec le fût (21) et une partie creuse (26), formant ouverture de la boîte de culasse, entre ladite partie avant et ladite partie arrière, caractérisé en ce qu'il y est prévu: deux surfaces formant siège (27a, 28a) sur la partie arrière (23) de la boîte de culasse pour correspondre avec les bossages (27, 28), situés à une certaine distance l'un de l'autre, sur la culasse (14), lesdites surfaces formant siège étant formées par une unique course d'un moyen de brochage (35).
2. Boîte de culasse selon la revendication 1 caractérisée en ce que les deux dites surfaces (27a, 28a), formant siège et espacées l'une de l'autre, sont situées dans un plan unique.
3. Procédé de fabricaion d'une boîte de culasse pour une arme à feu à culasse mobile, la boîte de culasse présentant une partie arrière (24) avec une ouverture (30) de boîte de culasse qui lui est adjacente, caractérisé en ce que le procédé comporte les étapes de:
(a) former une ébauche métallique de boîte de culasse présentant la partie arrière (24) et l'ouverture (30) de boîte de culasse;
(b) faire en sorte que la quantité de métal en surépaisseur dans ladite partie arrière soit une quantité qui ne dépasse pas celle qui peut être enlevée par usinage en une unique course d'un outil de brochage et
(c) passer un moyen de brochage (35) dans l'ouverture (30), de la boîte de culasse pour enlever du métal sur la partie arrière (24) pour former sur cette partie au moins deux surfaces (27a, 28a), espacées l'une de l'autre, formant siège des bossages de référence de la culasse.
4. Procédé selon la revendication 3, dans lequel on fait passer le moyen de brochage (35) dans un plan perpendiculaire à l'axe d'un canon de l'arme à feu.
EP83304997A 1983-05-02 1983-08-30 Boîte de culasse et son procédé de fabrication Expired EP0130253B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US49050483A 1983-05-02 1983-05-02
US490504 1983-05-02

Publications (3)

Publication Number Publication Date
EP0130253A2 EP0130253A2 (fr) 1985-01-09
EP0130253A3 EP0130253A3 (en) 1985-10-09
EP0130253B1 true EP0130253B1 (fr) 1988-11-30

Family

ID=23948343

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83304997A Expired EP0130253B1 (fr) 1983-05-02 1983-08-30 Boîte de culasse et son procédé de fabrication

Country Status (10)

Country Link
EP (1) EP0130253B1 (fr)
JP (1) JPS59202400A (fr)
KR (1) KR860000045B1 (fr)
AR (1) AR231353A1 (fr)
AU (1) AU562369B2 (fr)
BR (1) BR8304628A (fr)
DE (1) DE3378593D1 (fr)
ES (2) ES8406256A1 (fr)
MX (1) MX156730A (fr)
PT (1) PT77236B (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4719714A (en) * 1986-06-19 1988-01-19 Louis Palmisano Locking lug insert for a firearm receiver

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1924692A (en) * 1931-05-28 1933-08-29 Remington Arms Co Inc Firearm
FR794614A (fr) * 1935-09-06 1936-02-21 Procédé de fabrication des boîtes de culasses, culasses mobiles ou pièces similaires de carabines
US2606382A (en) * 1948-11-29 1952-08-12 Wilbur A Schaich Two-piece firearm bolt
AT281637B (de) * 1968-06-04 1970-05-25 Furtschegger W Schloß einer Heerenbüchse

Also Published As

Publication number Publication date
EP0130253A2 (fr) 1985-01-09
JPS59202400A (ja) 1984-11-16
AU1738783A (en) 1984-11-08
ES277149Y (es) 1986-10-01
BR8304628A (pt) 1985-02-20
AR231353A1 (es) 1984-10-31
ES525211A0 (es) 1984-08-01
ES8406256A1 (es) 1984-08-01
KR850001999A (ko) 1985-04-10
MX156730A (es) 1988-09-28
KR860000045B1 (ko) 1986-01-30
PT77236B (en) 1986-02-17
EP0130253A3 (en) 1985-10-09
DE3378593D1 (en) 1989-01-05
JPH0366600B2 (fr) 1991-10-17
PT77236A (en) 1983-09-01
ES277149U (es) 1986-02-01
AU562369B2 (en) 1987-06-11

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