Improvements in the gas-powered guns of the revolver type

Abstract: The gun includes a barrel (10), a revolving projectile loader (11) by way of a revolver drum tiltable to one side into a loading position, a rearsight holder (14) bearing a sight (15) which is adjustably positioned by a screw (16), a striking hammer (17) rotationally actuated by a trigger (18) and a grip frame (19) housing a compressed-gas cartridge (20) whose nozzle leans against a seal means (21). According to the improvements: a casing (24) moulded on the barrel (10) has an upper expansion (24a) which positionally secures a portion of the rear sight holder (14) ; the revolving projectile loader (11) is constituted by two pieces obtained by moulding, a first piece (29) comprising a series of tubular elements (30) provided to accommodate the projectiles and to transfer them to the barrel (10), and a second piece (32) constituting a casing and receiving in its inside the former one in a plug-in engagement ; the rearsight holder (14) is provided with means for a quick assembly thereof ; a hammer (17) is formed by two halves (17a, 17b) detachably attached to each other.

Description: The present invention refers to improvements in the gas-powered guns of the revolver type, through the application of which important advantages of constructional, operational and practical character are obtained over the guns of this type which are known so far. The gun as per the invention proposes in particular the construction of a series of mouldings advantageously made of plastics material, as well as of some of its pieces comprising metal inserts in the mouldings, and of some other compound pieces comprising two parts of different characteristics, all this in order to reduce the manufacturing costs. Known gas-powered guns of the type to which the present invention relates are described in US-A-4,422,433 and US-A-5,160,795, GB-A-2,179,429 and EP-A-0367,676 a gun according to the preamble of claim 1 is known by practice. FR-A- 2 631 557 refers to a gas-powered toy-gun comprising a revolving projectile loader 2 having a cylindrical configuration wherein the length predominates over the diameter as illustrated in Fig. 1 of drawings, said projectile loader having a plurality of chambers for receiving the projectiles and a rear part with a toothed configuration intended ro help in driving said loader, the patent proposing a new air compression mechanism. This invention as defined a claim 1 concerns in the first place the revolving part of the gun or revolving projectile loader which, instead of being a simple disc, as for example in the gas-powered gun described in cited U.S Patent No. 4,442,433, consists in a cylindrical body in which the length predominates over the diameter, which gives the article a more realistic look. For this purpose and taking into account that said loader is according to the invention supposed to be obtained by moulding and advantageously of plastics material, in order to facilitate the manufacture, save material, make the process more economical and guarantee the required accuracy in the finished piece a structure is proposed for said loader consisting of a first piece bearing a series of tubular elements which are distributed in a circle, equispaced, parallel to the rotation axis and perfectly adjustable in coaxiality facing the barrel hole through rotation of the assembly, and a second piece engaged on the former one by way of casing and attached to it, with an outside look like that of the drum of a conventional gun. This invention concerns as well the characteristics of the rearsight, and more precisely some means for the quick assembly of said rearsight on a setscrew to notably simplify and lower the cost of said assembly. For this purpose said rearsight, instead of being integral with a block with a threaded through hole through which a setscrew is arranged for the positioning by shifting when turning said screw, as per a conventional structure, is now integral with a piece in the shape of a channel-shaped clamp which is capable of fitting into a complementary channel-shaped hollow provided in the rearsight holder, said channel-shape, which is obtained by moulding, presenting a threaded sector which is engageable, by simple insertion into the cavity between its flanks, with a setscrew for the shifting and fixing of said rearsight. The rearsight/screw subassembly is in this way assembled in a very quick manner, and its association with the rearsight holder is as well very simple. A characteristic of these improvements is as well the assembly of the rear sight holder on the revolver, which is very simple, said rear sight holder comprising for such a purpose an end portion which is distal from the rearsight, is situated at a lower level (said end portion presenting for such a purpose an offset) and has lateral tabs which fit into opposed throats situated directly above a hole for the assembly of the barrel, which in its turn presents an upper expansion formed from a casing of plastics material moulded on said barrel, said expansion blocking said tabs in the assembly position of the barrel. Moreover, said end portion of the rear sight holder has a through hole provided to receive through it a screw for the clamping of the barrel and which in its turn fastens the rear sight holder, which is thus directly attached to the gun body thereby extending on its upper part. These improvements concern as well the construction of the hammer, which consists here of two pieces which are namely a heavier one provided for the purpose of striking, and a second one provided to serve as a support and hinged connection means and made out of a plate with several bendings, and they also concern a particular structure and assembly of an appendage by way of nose associated with the trigger of the gun and provided to rotationally actuate said hammer. A protuberant configuration has been as well provided including a flat and a ramp ending the upper part of the hammer, so as to allow to insert the transversal bolt which acts as a safety bolt and has a complementary flat and ramp, with no need to raise said hammer to carry out said operation. Also characteristic of the improvements to which the invention refers is the way to attach the handle plates of the gun to the grip frame, at least one of said handle plates being removable in order to facilitate the replacement of a compressed-gas cartridge such as a CO 2 cartridge equipping the assembly. The revolving projectile loader can be tilted to the loading position as per a structure known in itself, but in the proposed gun the support and tilting member comprises a main portion of moulded plastics material in which are inserted the ends of two pins extending to the outside and parallel to each other, one of them serving as a hinged connection with the gun body, and the second one serving for the mounting of said loader in a rotatable condition. Lastly and according to the improvements proposed by the invention one or more holes have been lastly provided in the gun described herein underneath the seal applied against the nozzle of the CO 2 cartridge, so that if said CO 2 cartridge were removed while still containing a given volume of gas the latter can flow to the outside without unfavourably affecting said seal. The above and other objects, advantages and features of the present invention will become apparent from the following description of certain preferred embodiments thereof. The invention will now be described in detail with reference to the accompanying drawings wherein: Fig. 1 is a longitudinally sectional view of a gas-powered revolver incorporating the described improvements. Fig. 2 is a perspective view of the diametrically sectioned revolving loader or drum including the support or hinge for its lateral tilting. Fig. 3 is an elevational view of the back of said revolving loader showing the ratchet mechanism for its rotational indexing. Fig. 4 is a conventional perspective view of the rear sight holder with the detail of the assembled rearsight and also showing the upper front part of the gun body into which an end of said rear sight holder is to be fitted. Fig. 5 is a perspective view detailing the rearsight quick assembly means. Fig. 6 is a perspective view of the assembly formed by the striking hammer and its support. Fig. 7 is a cross-sectional view of the grip frame of the gun detailing the means for the removable assembly of one of the handle plates. Figs. 8a and 8b illustrate in plan-view the particular configuration of the operative portion of a transversal bolt acting as a safety bolt as proposed, as well as the way in which said bolt acts on the striking hammer in two operative positions, in the second one blocking said hammer. Fig. 9 lastly shows a partial section of the leaning on the gun of the end of the compressed-gas cartridge, where in accordance with the related improvements holes have been provided for the derivation of residual pressures in case of disassembly of said CO 2 cartridge. The gas-powered gun to which these improvements are applied, which is shown in said Fig. 1, comprises a barrel 10, a revolving projectile loader 11 by way of a revolver drum tiltable to one side into loading position because of being associated with a support 12 which is tiltable around a pin 13, a holder 14 bearing a sight 15 which is adjustably positioned by a screw 16, a striking hammer 17 rotationally actuated by a trigger 18 and a grip frame 19 housing a CO 2 cartridge 20 whose nozzle leans against a seal means 21 and whose bottom rests on a cup-shaped rest 22 linked to a stem 23 which is threadingly engaged in the body of said grip frame 19 and ends in a (partially illustrated) grip 23a, all this as per a structure which is in itself conventional in this kind of guns. The revolving loader 11 is maintained in its firing position (Fig. 1) through the actuation of a catch 61 housed in the barrel casing 24 and loaded by a spring 62 to lock the tiltable member 12 which supports said loader 11. Said catch 61 has an appendage (not shown) which is accessible from the outside for its retraction by compressing the spring 62. In accordance with the improvements of this invention, gun barrel 10 has a casing 24 made of plastics material which presents an upper expansion 24a which positionally secures the rear sight holder 14, and more precisely blocks an end portion 14a thereof which is distal from the rearsight 15 and ends in lateral tabs or flanges 25 (see Fig. 4) which fit into a seat defined by two opposed throats 26 flanking a central recess 27 of a width equivalent to that of body 14 whose portion 14a is inserted in said seat 26, 27 whereby body 14 is attached to the top or back of gun body 28 thereby longitudinally extending thereon, as can be seen in Fig. 1. The rear sight holder 14, advantageously made of plastics material, has in the area of portion 14a a through hole 46 through which a screw 43 is arranged to threadingly engage in a boring provided in gun body 28 and to press on casing 24 made of plastics material and moulded on barrel 10 thus firmly attaching it to the gun. As it can also be seen in Fig. 1, a second screw 44 threads its way into a prismatic hole 45 which is provided in the rear sight holder 14 and whose shape facilitates the self-tapping penetration of said screw 44 whose end rests on the top of gun body 28 thus allowing to lift body 14 to a bigger or lesser extent with respect to said top part of the gun. A lug 59 limits the lift of said body 14 as it is arranged in a rear pocket 60. According to these improvements the projectile loader 11 revolving around pin 34 adopts a cylindrical configuration with a length sensibly bigger than the diameter, and is formed by two pieces which are both obtained by moulding advantageously of plastics material and which are namely a first piece 29 comprising a series of tubular elements 30 to receive the projectiles (which are not shown) and to transfer them to barrel 10, said tubular elements 30 being integral with a discoidal portion 31, and a second piece 32 which constitutes a casing and receives in its inside the former one in a plug-in engagement. Tubular elements 30 are parallel to each other and to swivel pin 34 and the axis of barrel 10, in order to allow an indexed and coaxial adjustment with respect to the hole of said barrel by revolving the assembly. Said tubular elements 30 are integral with a discoidal portion 31 in which they end through a plurality of circular holes 33 distributed in an equispaced way next to its periphery to admit the ammunition which is retained in its seat in the initial part of said tubular elements 30 directly close to hole 33 with the aid of longitudinal ribs 63 which can be seen in Fig. 2 and of which 3 are advantageously provided. The discoidal portion has on its circular outer surface a central toothing 35 provided to be driven by engagement with a ratchet 36, and a second peripheral toothing 37 determining a rotation end stop configuration with respect to one of the faces 38a of a portion 38 of ratchet 36 ending in a ratchet pawl 38b. The attachment of cylindrical casing or shell 32 is carried out in the embodiment shown in Fig. 2 by fitting and locking an engaging mouth portion 32a by elastic deformation and locking with an anchoring profile 31a constituted by the bearing edge of discoidal portion 31. The mutual attachment of pieces 29 and 32 could be achieved in an alternative way by simply arranging an adhesive on the correspondent profile between both pieces. As can be seen in said Figs. 1 and 2, in a central hole of the bottom 32b of the casing 32, for the passage of pin 34 rotatably supporting the revolving loader 11 there is a ring-shaped recess 64 housing a seal means 39 determining a friction on said pin in order to brake the loader to thus immobilize it during the back motion of ratchet 36 thus preventing its motion by friction with part 38 of said ratchet in its return travel. In these same Figs. can also be seen that the support member 12 is carried out as a moulded block out of plastics material in which said pins 13 for the hinged connection and 34 for the revolving of loader 11 are inserted. The attachment of revolving loader 11 to its swivel pin 34 is carried out by means of a screw 65 housed in a central recess 66 of said discoidal portion 31. In Figs. 4 and 5 can be seen the rearsight 15 quick assembly means consisting of a moulding advantageously made of plastics material in the shape of a channel-shaped clamp 40 integral with said rearsight 15 and having an inner curved sector 40a with a thread capable of riding on setscrew 16 ending in driving head 16a, in such a way that the assembly formed by channel-shaped clamp 40 and screw 16 is obtained by simple insertion of the latter into portion 40a of the former whose flexion allows said insertion, and both are thereupon introduced into a hollow 41 of the rear sight holder 14 and the screw is axially immobilized, for example, by a snap ring 42 or by another suitable retaining means or configuration. The striking hammer 17 of the gun is formed (see Fig. 6) by two pieces 17a and 17b which are advantageously attached to each other by a screw 47. The first 17a of said pieces is provided to strike on a valve 67 provided to open the passage of gas through the intermediation of an element 68 (shown in Fig. 1) in the shape of a rod linked to the trigger 18, in such a way that the striking action of portion 17a of hammer 17 on said valve 67 is only possible through the action of the trigger 18 and cannot take place because of an accidental blow on the hammer, the use of said rod 68 and its constructional structure being conventional in these gas-powered guns. Hammer 17 ends at the top in a protuberance 48 presenting a flat portion 48a followed by a ramp 48b, and an equivalent configuration formed by a flat 49a and a ramp 49b appears at the end of a transversal bolt 49 acting as a firing safety bolt (see Figs. 6 and 8a, 8b). Such a configuration allows that by arranging said bolt 49 in a hammer blocking position said hammer 17 can be moved away and kept at a sufficient distance "d" from its striking plane without the user having to previously raise said hammer or to load the spring 50 which is associated with the swivel pin 51 of said hammer 17. The second 17b of said pieces forming the hammer 17 and shown in Fig. 6 is an actual support and has been obtained from a piece of plate and by means of several bendings, and said piece is associated with said swivel pin 51 and is raised by a driving nose 52 associated with trigger 18 with the interposition of a return spring 53 (see Fig. 1) which allows said nose 52 to pivotally bend thus passing edge 69 of portion 17b of the hammer 17 in its return travel, thus facilitating the return of trigger 18 to a rest position. As shown in Fig. 7, the handle plates 55 of grip frame 19 are attached to said grip frame by means of appendages 56, and said appendages are engaged by snug insertion and elastic deformation in pockets 57 of the grip frame 19, in at least the appendages 56 of one of the handle plates their end configuration being such that it allows to remove them from their pockets. A second handle plate 55 is generally provided with appendages ending in a harpoon-like configuration and which are not removable (these latter appendages not having been illustrated. Fig. 9 shows that surrounding the seal 21 against which the end of the nozzle 20a of the CO 2 cartridge 20 is applied there is a hole 58 for the derivation therethrough of any flow of residual compressed-gas eventually remaining in the CO 2 cartridge 20 when carrying out its replacement. An eventual deterioration or loss of said seal 21 is in this way prevented. The seal 21 is penetrated by punctured pin 60 including an axial passage 60a communicating with chamber 61 and channel 62. In Fig. 1 is also lastly shown a piece 71 known in itself which serves to block hammer 17 in the simple-action firing modality, according to which, as is well known, said hammer 17 is cocked without operating the trigger 18, and when acting on the latter thereby slightly shifting it backwards when going to fire the loader 11 completes its revolving motion and said hammer 17 is released, this allowing a better control of the gun by minimizing the necessary effort to be exerted on the trigger 18. As opposite to this, in the double-action way of operation when actuating the trigger 18 the loader 11 revolves up to the firing position, the hammer 17 is cocked and is then finally released to strike on the valve 67, but this entails a bigger effort on the trigger 18, which is the member that conducts the whole operation. In the case of the single-action modality, when raising the hammer its portion 70 of support 17b drives rod 68 which shifts trigger 18 backwards, and the latter in its turn and by means of portion 38 of ratchet 36 and its pawl 38b engages toothing 35 and revolves the revolving loader up to a position close to that wherein a tubular element 30 is facing barrel 10. To block hammer 17 in said position said piece 71 is employed which pivots on pin 72 and is provided with a bending 73 provided to lock piece 17b once it has turned passing said bending 73. Piece 71 has besides an ear 74 which will be directly actuated by a lateral protuberance 75 of trigger 18, and which when thus actuated moves said piece 71 overcoming the action of its spring 76, hammer 17 being then thus released while the final backward shifting of trigger 18 produces a final turning of loader 11 and thus the alignment of tubular element 30 with barrel 10, whereupon the firing takes place. The closing of valve 67 is assured by a spring 77 pressing it against its seal 78, all this also according to a conventional structure.

Claims: A gas-powered gun of the revolver type, including a barrel (10), a revolving projectile loader (11) wherein the length predominates over the diameter by way of a revolver drum tiltable to one side into loading position associated with a support (12) which is tiltable around a pin (13), a rearsight holder (14) bearing a rearsight (15) which is adjustably positioned by a setscrew (16), a striking hammer (17) rotationally actuated by a trigger (18) and a grip frame (19) with handle plates (55) housing a compressed gas cartridge (20) having a nozzle (20a) which leans against a seal (21) means characterized in that it comprises: a casing (24) of plastics material moulded on said barrel (10) said casing having an upper expansion (24a) which positionally secures said rearsight holder (14) at an end portion thereof which is distal from said rearsight (15); the revolving projectile loader (11) having a cylindrical configuration constituted by two pieces obtained by moulding, a first piece (29) comprising a series of tubular elements (30) provided to accommodate projectiles and to transfer them to said barrel (10), said tubular elements (30) being integral with a circular wall (31), and a second piece (32) constituting a casing and receiving in its inside the former one in a plug-in engagement; the rearsight holder (14) being provided with a hollow 41 for a quick assembly of said rearsight (15) coupled to said setscrew (16) a hammer (17) being formed by two halves (17a, 17b) detachably attached to each other, one of them being provided for striking purposes, and the other one acting as a support and hinged connection means; grip frame handle plates (55) having legs (56) moulded integrally therewith. A gas-powered gun as claimed in claim 1, characterized in that: said first piece (29) forming said revolving projectile loader consists of said circular wall (31) which has a plurality of through holes (33) distributed in a circle and equispaced next to its periphery and continued in said tubular elements (30) which are parallel to a swivel pin axis (34) of said revolving projectile loader and also parallel to a bore axis of said barrel (10) in firing position; said tubular elements (30) are coaxially adjustable with respect to said bore of said barrel (10) by revolving said projectile loader; said circular wall (31) integrating in a surface which is opposed to said tubular elements (30) a toothing (35) provided to be driven by engagement with a ratchet (36); a second peripheral toothing (37) on said circular wall (31) determining a rotation end stop configuration, said second piece (32) provided by way of casing is formed by a cylindrical shell which is adequately dimensioned to receive by plug-in insertion the former one to which it is attached through its engaging mouth portion; and both said first and second pieces (29, 32) comprising corresponding central holes for their association with said swivel pin (34). A gas-powered gun as per claim 2, characterized in that said two pieces (29, 32) forming said revolving projectile loader (11) are locked together by fitting and locking an engaging mouth portion of said casing (32) by elastic deformation and locking with an anchoring profile constituted by a bearing edge of said circular wall (31). A gas-powered gun as per claim 2, characterized in that said two pieces (29, 32) forming said revolving projectile loader (11) are locked together by insertion and arrangement of an adhesive on the mutually contacting parts of both pieces. A gas-powered gun as per claim 1, characterized in that a ring-shaped (39) recess is provided bordering said central hole of said second piece for the passage of said swivel pin (34) rotatably supporting said revolving projectile loader (11), said ring-shaped recess housing a seal means determining a friction on said swivel pin in order to brake said revolving projectile loader to thus immobilize it during a back motion of said ratchet (36). A gas-powered gun as per claim 1, characterized in that said means for a quick assembly of said rearsight (15), comprise: a piece (40) which is integral with said rearsight and has a shape like a channel-shaped clamp having an inner curved sector with a moulded thread (40a); said clamp being shiftable through a hollow (41) of said rearsight holder (14) through the association with said clamp of a screw (16) which is inserted between the flanks of said channel-shape clamp, extends throughout said hollow (41) and is axially immobilized at one of its ends by an element (42) for securing it to said rearsight holder (14). A gas-powered gun as per claim 1, characterized in that: said rearsight holder (14) is attached to said gun body by means of a front end portion thereof which is distal from said rearsight (15), is at a lower level and has lateral tabs (25) which fit into opposed throats (26, 27) situated directly above a hole for the assembly of said barrel (10); said upper expansion (24a) of said casing blocking said tabs in an assembly position; and said front end portion of said rearsight holder having a through hole provided to receive through it a screw for the clamping of said barrel (10) and of said rearsight holder (14), which is thus attached to the top of the gun thereby extending thereon. A gas-powered gun as claimed in claim 1, characterized in that said hammer (17) consists of two pieces (17a, 17b) which are integral, a heavier one provided for the purpose of striking, and a second one provided to serve as a support and hinged connection means. A gas-powered gun as claimed in claim 8, characterized in that said second piece (17b) is made out of a plate with several bendings one of said bendings (70) forming a protruding part which can contact with a driving nose associated with said trigger (18) of the gun and provided to rotationally actuate on a portion of said hammer. A gas-powered gun as claimed in claim 9, characterized in that said driving nose (52) is assembled in such a way that it can pivot in only one sense around a pin in order to allow the return of the trigger to its rest position, said driving nose being provided with a return spring. A gas-powered gun as claimed in claim 1, characterized in that said handle plates (55) of said grip frame are attached to said grip frame by means of legs (56), and said appendages are engaged by snug insertion and elastic deformation in pockets of said the grip frame (19), and the appendages of at least one of said handle plates (53), have an end configuration being such that it allows to remove them from said pockets. A gas-powered gun as claimed in claim 1, characterized in that said support (12) of said revolving projectile loader allowing to tilt it laterally consists of a first part which is obtained by moulding and in which are inserted the ends of two metal pins, one of them (13) serving as a hinged connection with a gun body, and the second (34) one extending through an assembly formed by the two pieces (29, 32) defining said revolving projectile loader (11). A gas-powered gun as claimed in claim 1, characterized in that at last one hole (58) has been arranged surrounding a seal (21) against which the end of said nozzle (20a) of said compressed-gas cartridge (20) is applied, said hole providing a derivation therethrough of any flow of residual compressed-gas eventually remaining in said cartridge (20) when carrying out its replacement. A gas-powered gun as claimed in claim 1, characterized in that said hammer ends at the top in a protuberance (48) presenting a flat portion (48a) followed by a ramp (48b), and there is an equivalent configuration formed by a flat and a ramp at the end of a transversal bolt (49) acting as a firing safety bolt, such a configuration allowing arranging of said bolt in a hammer (17) blocking position without an user having to previously raise said hammer.

Inventors: CASAS SALVA FRANCISCO, CASAS SALVA, FRANCISCO
Applicants: GAMO IND SA, INDUSTRIAS EL GAMO, S.A.
Application year: 1995
Main classification: F41B11
IPC codes: F41G1, F41B11