Patent Number: 052992438
Section: description

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As illustrated in FIG. 1, the glove holder unit according to the invention equips a confinement enclosure 1 having walls 2 separating the enclosure exterior 3 from the interior 4. In conventional manner, said enclosure 1 also has a filter 5, a pump 6 ensuring a vacuum within said enclosure and a transfer box 7 making it possible to insert or remove tools or products with respect to the interior of the enclosure 1. One of the enclosure walls 2 also has a transparent window 8 enabling the user to look into the interior of the enclosure 1. As illustrated in FIG. 4, the wall 2 has at least one access opening 9 (generally there are two for the user's two arms), said opening preferably being circular. A glove disk or ring 10 is fixed at said wall opening 9. A sleeve 11 for protecting the arm and the forearm, as well as a glove protecting the hand are fixed in detachable manner to said glove disk 10. The protective sleeve 11 comprises a first part 12 equipped with bellows and a second part 13 made from a flexible material. In addition, a working glove 15 is fixed by detachable assembly means 17 to the second part 13 of the protective sleeve. More specifically, the first part 12 equipped with bellows makes it possible to protect the arm, while the flexible part 13 protects the forearm and the elbow. This facilitates the movements of the user. The respective lengths of said two parts 12, 13 correspond to the average dimensions of the arm of a user. Advantageously, the rigid, bellows-equipped part 12 is made from semi rigid synthetic rubber and the flexible part 13 is made from vinyl. However, it is also possible to choose other materials provided that they comply with the requisite rigidity and flexibility criteria and have a resistance to oxidation and/or radiolysis phenomena and/or strong aciss. The assembly means 17 of the glove 15 and the sleeve 11 comprises a glove holder bracelet fixed to the end of the flexible part 13 of the sleeve and able to receive the glove 15. The glove holder bracelet 17 is constituted by a ring or a cylindrical tube portion having on its outer surface two substantially, annular grooves 19 and 21, the groove 19 being located substantially parallel in the center of said bracelet. These grooves 19, 21 make it possible to receive an O-ring 22 integral with the end of the glove 15. Moreover, said glove holder bracelet 17 has at its end opposite to that with the groove 21, a truncated coneshaped part 23 to which is fixed the end of the sleeve part 13. Said fixing can take place by bonding or heat sealing. The fixing is such that the glove holder bracelet 17 is located within the flexible part 13 of the sleeve. The glove disk 10 also has a cylindrical tubular shape. It has a peripheral, annular rib 25 defined by two annular ledges or rims 27, 29. The rim 27 is placed in the interior 4 of the confinement enclosure 1, while the rim 29 is placed on the exterior 3 of the enclosure. The rib 25 receives the edges of the wall 2 forming the opening 9. The glove disk 10 also has a lateral flange 31 extending towards the outside of the enclosure perpendicular to the wall 2. This annular, lateral flange 31 also has on its outer periphery two annular grooves 33, 35 respectively. The groove 33 is located between the groove 35 and the rib 25. The groove 35 receives the O-ring 37 forming the end of the bellows-equipped sleeve 12 and thus ensures the detachable fixing of said sleeve. Means 39 for sealing the first sleeve part 12 is provided and positioned at the junction between the two protective sleeve parts 12 and 13. More specifically, said sealing means 39 comprises a ring which is threaded on its outer surface and fixed by bonding or heat sealing respectively to the free end of the bellows-equipped sleeve 12 and the free end of the flexible part 13. The thread is designated 40. This ring 39 is able to cooperate with a sealing or closing plug 41 shown in FIG. 7 and which will now be described in greater detail. This plug 41 is constituted by a disk or base 42 made from a plastic material and having a tapped, peripheral, annular rim 43 so that it can be screwed onto the thread 40 of the ring 39. The tap of the plug 41 constitutes an example of fixing means to the ring 39. However, it is obvious that other fixing means such as bayonet fixing means, a catch or force assembly can be used without passing outside the scope of the invention. In addition, said plug 41 is provided substantially in its center with an aerating grid or grating 45. It also has a gripping handle 47 fixed to the plug base 42 on either side of the grid 45. When the plug 41 is in place on the ring 39, said grid 45 ensures the vacuum within the bellows 12. The glove holder unit according to the invention also has means for locking the assembly means 17 of the glove 15 and the sleeve 11. These locking means is more particularly illustrated in FIGS. 5 and 6 and carries the general reference numeral 49. The locking means 49 preferably has two substantially identical, symmetrical elements, but there can also be more than two elements. The upper element (relative to FIG. 6 and the normal use direction), carries the reference numeral 51 and the lower element the reference numeral 53. The elements 51, 53 are placed on the lateral flange 31 of the glove disk 10 so as to cover the latter. More specifically, each element 51, 53 is shaped like a semicircularly curved channel with a substantially C-shaped section, as can best be gathered from FIG. 5. This channel is positioned "astride" on at least one part of the lateral flange 31 of the glove disk. Therefore each element 51, 53 comprises a lateral, peripheral edge 55 terminated by an element forming a gasket 57 for engaging in the groove 33 of the glove disk 10. This edge or rim 55 is extended towards its center by a front face 59 and by a slightly oblique portion 63. The latter is internally extended by a circular arc-shaped shoulder 65 for receiving the truncated cone-shaped part 23 of the glove holder bracelet 17. Moreover, said two elements 51, 53 are provided internally, level with their central opening 67, with four return-preventing strips 69 made from a thick, flexible plastic material (cf. FIG. 6). These strips 69 prevent the glove 15 from being sucked into the interior of the bellows-equipped protective part 12. The locking means 49 can occupy two positions, a first locked position in which the two elements 51, 53 are locked by means 71 and a second unlocked position, in which these two elements are spaced apart from one another and permit the passage of the glove disk 17 and the glove 15. The locking means 71 constituted by two spring hooks provided on either side of the two elements 51 and 53. In the locked position, the two elements 51 and 53 are engaged against one another (left-hand part of FIG. 6) and in the unlocked position, the lower element 53 is slightly spaced from the upper element 51 (right-hand part of FIG. 6). The operation of the device will now be described in greater detail relative to FIGS. 2A to 3C. FIG. 2A illustrates the glove holder unit in the inoperative position, i.e. when the user's hand and arm are not in the interior. It should be noted that the locking means 49 is only partly shown. When the user wishes to change the glove 15, whose O-ring 22 is positioned in the annular groove 21, he introduces his hand and arm into the glove holder unit in the manner shown in FIG. 2B and seizes the sealing plug 41 by means of its gripping handle 47. He withdraws his hand and arm into the protective sleeve 11 until the plug 41 is level with the ring 39 and then screws the plug onto said ring by a quarter turn rotation. He is then in the position illustrated in FIG. 2C. Then, he continues to withdraw his hand and the glove 15 until the latter is outside the enclosure and turns over the glove 15 in the manner illustrated in FIG. 3A. In order to do this, it is obviously necessary for the locking means 49 to be unlocked (bottom position of the element 53 illustrated in FIG. 2C). Then, using his other hand, he locks the locking means 49 and the ring 17 consequently rests on the shoulder 65 of the locking means 49. He is then able to slip over the worn glove 15, which is inside out, a new glove 15', which is also inside out and whose O-ring 22' is located in the annular groove 19 FIG. 3A. He then inserts his hand in the new glove 15' and seizes the worn glove 15, removes the O-ring 22 of the glove 15 from the annular groove 21 and drops the worn glove 15 into the glove holder unit. The O-ring 22' of the new glove 15' is then moved from the annular groove 19 into the annular groove 21, while maintaining maximum contact with the glove holder bracelet 17. In order to bring about maximum sealing and security, at least one turn of the not shown adhesive tape is placed at the annular groove 21 in which is placed the O-ring 22'. Then, as illustrated in FIG. 3B, he again inserts his hand in the glove 15', so as to put it into place within the bellows 11. He can then unlock the plug 41 by rotating the latter and place it within the enclosure. He is then in the situation shown in FIG. 3C, where his hand is protected by the glove 15'.