PNEUMATIC TOOL AND VIBRATION INSULATOR ASSEMBLIES FOR THE SAME DESCRIPTION OF THE INVENTION This invention relates generally to vibration isolating assemblies for pneumatic tools, particularly this invention relates to an assembly for vibration isolation of the pneumatic tool, adapted for the Mounting between the handle of a pneumatic tool and the tool housing so that vibration is reduced. Several problems associated with the arrival in the vibratory isolators for use with a power tool include where to place the vibratory isolator in the tool and how to manufacture it, in such a way that it can withstand the intense vibrations involved with such a tool. The insulator must separate the tool in two pieces, in such a way that one can move in relation to the other, thus minimizing the transfer of vibration. The difficulties arise in that the vibration isolating assembly must also be subsequently strong to hold two pieces together and, in the case of pneumatic tools, allow compressed air to pass through them. U.S. Patent 5,453,577 issued to Everett et al. On September 26, 1995, entitled "Pneumatic Tool and Vibration Isolator Mounts Therefor", it shows vibration mounting devices between the handle of the pneumatic tool and the housing of the tool. In particular, the patent teaches placing a vibration isolator, elastic between two support members and then passing a conduit of compressed air between them. To achieve reduced vibration, the openings of the support members remain sealed to the compressed air duct, while the vibration isolators themselves remain separate from the duct. Although the patent mentioned in the foregoing provides an improved system for locating the supports for vibration damping, it incorporates numerous parts. In this way, a vibration isolating system, simplified for mounting between a tool handle and housing is advantageous, which will produce the same or better results of vibration damping. The important technique mentioned in the above is hereby incorporated by reference. The present invention provides a pneumatic tool with vibration isolating assemblies, for mounting between a sleeve of the pneumatic tool and the tool housing to reduce the amount of vibration. The vibration support in particular uses first and second support members each having an opening with a compressed air line running through them. The second support member uses a sleeve opening that does not come into contact with the compressed air line. Positioned between the two support members is a vibration isolator. The vibration isolator covers the inside surface of the recessed opening and makes contact directly with the compressed air duct. The vibration isolator also includes a space that divides the vibration isolator into an inner portion and an outer portion such that the inner portion is secured to the compressed air conduit and the outer portion separates the two support members into an integral portion. spatial relationship. The space also separates the recessed opening of the compressed air duct. This simplified system reduces the number of parts by approximately 75% and therefore substantially reduces the assembly cost. Accordingly, it is an advantage of the present invention to provide a vibration-isolating holder for mounting between the handle of the pneumatic tool and the tool housing, thereby reducing the vibrations transferred to the user. According to the above, it is another advantage of the present invention to provide a vibration isolating support, which reduces the number of parts required.
In accordance with the foregoing, it is another advantage of the present invention to provide a vibration isolating carrier that is inexpensive to manufacture. According to the above, it is another advantage of the present invention to provide a vibration isolator assembly, through which an air duct can pass. The above features and other features and advantages of the invention will be apparent from the following more particular description of a preferred embodiment of the invention, as illustrated in the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS The preferred exemplary embodiment of the present invention, hereinafter will be described together with the accompanying drawings, where similar designations represent similar elements, and: FIGURE 1 is a top view of the pneumatic tool illustrating a plurality of vibration isolating supports of a preferred embodiment of the present invention, for isolating a handle of a plurality of handles from a vibrating source in a pneumatic tool; FIGURE 2 is a side view of a pneumatic tool illustrating a plurality of vibration isolating supports of a preferred embodiment of the present invention for mounting handles to a pneumatic tool;
FIGURE 3 is a side view of a vibration isolating assembly of a preferred embodiment of the present invention; FIGURE 4 is a front view of a vibration isolator holder of a preferred embodiment of the present invention; FIGURE 5 is a side sectional view of a vibration isolator holder, regulator of a preferred embodiment of the present invention, as taken through section 5-5 of FIGURE 4; and FIGURE 6 is a sectional view of the vibration isolator holder of a preferred embodiment of the present invention as taken through section 6-6 of FIGURE 4. FIGURE 1 illustrates a top view of a pneumatic tool 10 such as a grinding machine, a sander or polisher. The tool 10 includes a housing 12, a regulating handle 20 and a support handle 30. Optionally, the support handle 30 can be replaced by a support handle 35 with a silencer extending therefrom. The regulating handle 20 is attached to the housing body 12 by a vibration-isolating support of the regulating handle 22 and the support handle 30 is attached to the housing 12 by the vibration-isolating holder of the support handle 32.
An air hose (not shown) is engaged at the end of the regulating handle 20 in an inlet bushing 27. The inlet bushing 27 includes a mating surface 26 of the tool, such as a hexagonal surface. The engaging surface 26 of the tool is proximate to the male threads (on the inside of the handle 20 in FIGURE 1) for coupling the inlet bushing 27 to the handle 20. Concentrically internal to the inlet bushing 27 are the female threads for coupling with an air hose for the handle 20. During operation, the air passes through the handle 20 by means of the air duct 24 and then through the vibration-isolating holder of the regulating handle 22 in an air motor Within the housing 12. The air is expelled from the motor into the housing 12 in the air duct 34 in the support handle 30 by means of the vibration-isolating support of the support handle 32. The air in the air duct 34 then returns inside the housing 12, where it is eventually expelled through an outlet (not shown) in the housing 12. Optionally, a support handle 35 with a silencer 36 may be attached to the housing 12. The a The shaped openings 38 in the muffler 36 eject the air that has passed through the air duct 34. FIGURE 2 represents a side view of the pneumatic tool 10 of the present invention. The pneumatic tool 10 includes a regulating lever 28 having a fastener 29 thereon. The fastener acts as a safety feature to prevent unintentional operation of the tool 10 the support handle 30 also includes a handle holder 33 made of material, such as rubber foam to increase the friction grip of the user during use of the pneumatic tool 10. FIGURE 3 shows a side view of the vibration-isolating holder of the handle 32. The support 32 includes the following: a sleeve 70 Duct extension, suitable for joining to a tool handle; a widened, tubular opening 46 suitable for joining to a tool housing; and a vibration isolating body 72, suitable for reducing vibration of the tool housing to the tool handle. In the preferred embodiment, the connection of the insulating support 32 to the housing of the tool is made with screws or the like (see FIGURE 6), and the connection of the support 32 to the handle of the tool is made with bolts that are mounted, for example in the cavity 74. The tubular widened opening 46 can include a hole 76 and a U-shaped spacing slot 78 suitable for holding a roller pin to be used as a backrest of the safety mechanism. Preferably, the complete support is manufactured in an individual self-contained unit for ease of installation or replacement. FIGURE 4 shows a front view of the vibration isolating holder 32 of the support handle. The support 32 includes a mounting plate or a support member 60 having a conduit for compressed air 56 and mounting holes 42 thereon. On the opposite side of the support member 60, a vibration isolator is attached to it (see FIGURE 5). Located centrally on the support member 60 is the enlarged opening 46, which projects orthogonally towards the observer of the mounting plate (see FIGURE 5). An outer portion 48 of the vibration isolator and an inner portion 50 of the vibration isolator also extends orthogonally toward the observer inside the enlarged opening 46. The outer and inner portions 48 and 50 of the vibration isolator are separated by a space 52 placed between them. The inner portion of the vibration isolator 50 is secured to the outer surface of the compressed air duct 54. Preferably, the inner portion of the vibration isolator 50 will be sealed in a fixed manner to the compressed air duct and the isolator the outer vibration 48 will be sealed in a fixed manner to the enlarged opening 46. The mounting holes 42 provide a conduit means for a screw or the like for passing through and securing the assembly 32 to the tool housing (see FIGURE 6). Now with reference to FIGURE 5, a side sectional view of the vibration isolator holder of the support handle 32 is shown as taken through the line in section 5-5 of FIGURE 4. The sectional view shows first and second mounting plates or support members 58 and 60 with the vibration isolator 62 having first and second side surfaces secured therethrough. The support members 58 and 60 and the vibration isolator 62 are located around the circumference of the compressed air duct 54. The compressed air duct 54 has a compressed air duct 56, which includes in it a substantially uniform opening for the passage of compressed air. In the preferred embodiment, the vibration isolating material uses injection molding or some other similar process to "fuse" the vibration isolator to the support members and the compressed air conduit. It is recognized, however, that any other means of maintaining the placement of these parts (e.g., grooves, notches, sealing fittings, glue, etc.) would be adequate. Furthermore, it is also contemplated that the compressed air duct 54 and the first support member 58 can be forged or integrated from a single piece of material. The second support member 60 includes a widened opening 46, which projects orthogonally away from the first support member 58. In the preferred embodiment, the enlarged opening 46 is tubular in shape and is forged from the same piece of material as the second. support member 60. However, it was recognized that the enlarged opening 46 may have some other cross section (e.g., oval, rectangular, etc.) and can be forged from a piece of completely separate material than that of the support member 60. As previously noted, the vibration isolator 62 includes an inner portion 50 and a separate outer portion 48 by space 52. The first support member 58 and the interior vibration isolator 50, provides exclusive securing of the support 32 around the compressed air conduit 54. To improve the securing, the compressed air conduit 54 may include a grooved edge. within which the first support member can be mounted. In this preferred embodiment, the second support member 60 and its enlarged opening 46, do not directly contact the compressed air duct 54. On the contrary, the space 52 separates the second support member and its enlarged opening from the air duct compressed 54. However, the inner surface of the enlarged opening 46 may have the outer portion of the vibration isolating material 48 fixed in a seal or a shape fused thereto (see FIGURE 6). Additionally, the inner portion of the vibration isolator 50 may be sealed or fused to the compressed air conduit within the enlarged opening portion of the vibration support 32 (see FIGURE 6). Now with reference to FIGURE 6, a second side section view of the insulator and the vibration of the support handle of the present invention is shown taken through section 6-6 of FIGURE 4. FIGURE 6 shows a first opening 41 through the first support member 58 and a second opening 42 through the second support member 60. The vibration isolator 62 includes a conduit 43 connecting the first opening 41 and the second opening 42. These orifices and conduits they provide a means for securing vibration support to a pneumatic tool housing. In particular, the screw 80 can be inserted through the hole 41, in the duct 43 and extends through the hole 42, such that the head of the screw 82 attaches to the inner surface of the second support member 60. Although this preferred embodiment describes the use of screws and bolts as securing means, any combination of bolts, rods, pins, screws, fastening devices or the like can be used. It is further recognized that although the above description was drafted closely for a vibration isolator holder for a support handle, it is understood that it is generic for all types of supports including a vibration isolator for the regulating handle. Furthermore, it is further contemplated that this invention may be used in other locations within power tools. Although a grinder, sander or polisher 10 is illustrated, other types of rotary or alternating tools may be used with the vibration insulators themselves, such as a rotary handle, a punch, a drill or the like. The embodiments described herein have been discussed with the purpose of familiarizing the reader with the novel aspects of the invention. Although the preferred embodiments of the invention have been shown, many changes, modifications and substitutions may be made by one of ordinary skill in the art, without necessarily departing from the spirit and scope of the invention as described in the following claims.