MANUAL OF AIR-DRIVEN MATRACA, WITH THERMOPLASTIC LINING Background of the Invention Field of the Invention The present invention relates to energized hand tools and in particular to pneumatic hand tools and to the channeling of air through them. Description of the Technique Pneumatic hand tools such as air ratchet or ratchet wrenches are well known. Typically, these hand tools have an elongate housing, with a handle portion at one end and a head portion at the opposite end carrying a ratchet mechanism. An air driven motor is typically disposed in the intermediate housing at the ends to direct the ratchet mechanism, the air driven motor is coupled to a source of pressurized air, through an air inlet passage that is commonly extends axially through the handle portion. The housing may be provided with a trigger or trigger which may be in the form of a lever along the outside of the housing or a radial projection button adapted to be operated by a finger or fingers of the user's hand holding the handle, for operating an internal valve to pass air to the driven motor is air. Typically, the housing and the handle portion are formed of convenient metal. In the prior art tools, various types of exhaust assemblies have been used. In one assembly, air is discharged from a front portion of the coupling, sometimes through a silencing structure. Commonly, the air leaves the air-powered motor to a circumferential passage or chamber which is communized by an outlet opening in a front portion of the housing. Alternatively, subsequent discharge stubs have also been employed, including a discharge passage that passes back through the handle portion, generally parallel to the entry passage. While this constraint has the advantage of providing a further cooling of the rear end for the air-driven motor adjacent to the handle portion, it also requires a thicker handle portion to accept both inlet and discharge passages. SUMMARY OF THE INVENTION A general objective of the present invention is to provide an energized tool that is operated with improved fluid, which avoids the disadvantages of previous hand tools, while allowing for additional operative and stringent advantages. An important feature of the invention is to provide a manual tool of the established type, which allows subsequent air intake and discharge, without requiring any increase in the size of the handle portion of the housing. Yet another main feature of the invention is the provision of a manual tool of the established type, which provides a comfortable temperature for the user's hand when the tool is in operation. In connection are the previous aarasteristisas, another sarasterístisa of the invention is to provide a manual tool of the stable type, which allows an ergonomically comfortable grip for the handle portion of the housing of the tool. Certain of these and other embodiments of the invention can be achieved by providing an energized hand tool operated with fluid, including a housing having a handle portion and an engine operated fluid in the housing and a passage for fluid inlet to Through the porsión of handle that somunisa are the motor, the improvement sarasterizada because somprende: an outer surface in the porsión of handle that has an elongated sanal there formed and that somunisa are the motor and a lining of subjection that covers the outer surface of the handle portion and cooperates with the channel to define a passage for fluid discharge. The invention consists of certain novel features and a combination of parts which are hereinafter described fully illustrated in the accompanying drawings, and particularly pointed out in the appended claims, it being understood that various changes in the details may be practiced without departing from the spirit or sacrificing any of the advantages of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS For the purpose of facilitating an understanding of the invention, a preferred embodiment is illustrated in the accompanying drawings from an inspection of which, when considered in connection, is the following disclosure, the invention, its construction and operasion and many of its advantages will have to be easily understood and appreciated. Figure 1 is a perspective view of an air operated ratchet hand tool, which is constructed in accordance with and incorporating the features of the present invention;
Figure 2 is a fragmentary perspective view of the ratchet tool of Figure 1, with the clamping sleeve separated; Figure 3 is an enlarged fragmentary side elevation view of the rear portion of the tool of Figure 1; Figure 4 is a fragmentary bottom plan view of the tool of Figure 3; Figure 5 is a view similar to Figure 4, with portions cut out more clearly to show internal construssion; Figure 6 is a side elevational view of the bottom side of the tool shown in Figure 5, are broken away portions to more clearly show the internal construction; Figure 7 is a vertical sectional view taken on line 7-7 of Figure 3; Figure 8 is a vertical sectional view taken on line 8-8 of Figure 3; and Figure 9 is a vertical session view taken on line 9-9 of Figure 3. DESCRIPTION OF THE PREFERRED MODALITY With reference to Figures 1 and 2, a motorized manual tool is illustrated, operated fluid in the nature of an air-powered ratchet, usually assigned by the number 10. The air-powered ratchet
includes an elongate, generally cylindrical housing 11, preferably formed of a convenient metal, and having a main body 12 terminating at a front end 13 and defining an axial cavity 14 (see Figure 9), where a air driven motor 15 in a known manner. The housing 11 also includes a handle portion with elongated reduced diameter 16, attached to the main body 12 by an inclined shoulder portion 17 and ending in an annular end wall 18. The handle portion 16 has an axial bore 19 through which communicates through a convenient valve mechanism (not shown) with the air-powered motor, again in known manner. Coupled to the main body 12 of the housing
11 and coaxially therewith is a ratchet housing 20 having a rear engaging end 21 secured to the main body 12 by a clamping nut 22. The ratchet housing 20 has a head end 23 carrying a ratchet mechanism reversible 25 of known construction, which is provided with a displacement lug 26 for coupling with associated displaced plug tools. In use, the compressed air is provided to the air-actuated ratchet 10 through an air inlet duct 27, which is blown to the axial bore 19 through a convenient assesor 18, all a well-conical shape. The housing 11 has an outer surface 30, where two elongated sanal 31 and 32 are formed, with one extending substantially parallel to the axis of the housing 11 from the ends of the main body 12, all the way to the distal end of the housing. the handle portion 16. Each of the channels 31 and 32 is generally rectangular in shape, having an ansho substansially greater than its depth. Sanales 31 and 32 resiliently somunican are the air motor 12 through radial grooves 33 and 34 at the forward ends of the sanales (see also Figure 6). Now also referensia to Figures 5 to 9, the outer surface 30 of the housing 11 has formed an elongated slot 35 disposed between the sanales 31 and 32 and extending longitudinally from a front end, disposed adyasente the rear end of the main body 12 , at a rear end, disposed adjacent the rear end of the handle portion 16. Preferably, the slot 35 has a varying depth that tapers gradually from a relatively deep forward end 35a to a rearward end 35b with negligible depth. Also on the outer surface 30 two shorter, longitudinally projecting grooves 36 and 37 are formed (see Figures 5 to 7) each extending from the trailing end of the handle portion 16 forward to end points approximately a half between the ends of the handle portion 16. Preferably, the slots 36 and 37 are spaced equiangularly from opposite sides of a diametrical plane extending longitudinally of the handle portion 16 and passing through the slot 35. Projecting radially outwardly from the outer surface 30 approximately halfway between the ends of the main body 12 on its opposite side to the groove 35, is a rectangular lug 38, for a purpose which will be fully explained to sontinuasión. Now also reference to Figures 3 and 4, it is a fundamental aspect of the invention that a fastener liner 40 is provided to cover the housing 11, the liner 40 is formed of a flexible plastic material, preferably a suitable thermoplastic material that It can be pre-molded. The liner 40 generally corresponds to the external shape of the housing 11, which has a main portion 41, a handle portion 42 and a lining portion 43 that respivatively in use subtend the main body 12, the handle portion 16 and the body portion. shoulder 17 of housing 11. Liner 40 preferably has a tongue projection 44 extending radially outwardly at its trailing end, to assist in preventing the user's fingers from slipping back out of liner 40, in use. Extending radially inward from the rear portion of the liner 40 is a partial end wall 45 which, in use engages a portion of the end wall 18 of the housing 11 to serve as a stop to limit the forward movement of the liner 40 over the housing 11. Also projecting radially inwardly from the inner surface of the liner 40 is a long rib 46 and two shorter ribs 47 and 48, which are dimensioned and arranged to correspondingly engage respectively in slots 35 to 37 on the surface outside of the housing 11 to prevent rotational movement of the bench 40 with respect to the housing 11. Also formed through the main body portion 41 of the liner 40 is a generally rectangular hole 49 (see Figures 4 to 6) sized and arranged to receive through lug 38 when the liner 40 is installed in its assembled position in the housing 11, as illustrated in Figures 1 and 3 a 9. When assembling, the liner or fastener 40 is designed to slide over the rear end of the housing 11 in a rotational orientation, such that the ribs 46 to 48 respectively engage in the slots 35 to 37, until the wall end 45 blows the end wall of the housing 18 at its point the lug 38 will rapidly jam into the hole 49, thus effectively preventing the removal of the liner 40 from the housing 11. It will be appreciated that the liner 40 is sufficient flexible and resilient to Accept this assembly operation. It is a significant aspect of the invention that as, when assembled, the inner surface of the fastening liner 40 engages tightly against the outer surface 30 of the housing 11 and cooperates with the channels 31 and 32 respectively, to define two elongated discharge passages. 50 and 51, both ending in a partially annular exit opening 52 between the rear end of the liner 40 and the rear end of the housing 11 (see Figures 1 and 6 to 8). In this way, it will be appreciated that in use, the air discharged from the air-driven motor 15 passes through the outlet slots 33 and 34 respectively within the passages 50 and 51, and thence longitudinally in the direction of the arrows in Figure 6 to exit in the rear part of the housing 11. Output passages for the air are produced, which are substantially parallel with the inlet passage formed by the axial bore 19, without requiring any dimension in transverse cross section additional to the housing 11. In addition, the movement of the expanding dessarga air through the passages 50 and 51 effectively serves to cool the rear end of the air-driven motor 15. The preferential subjection 40 is formed of a thermally insulating, to provide a comfortable temperature for the user's hand. In addition, the clamping lining 40, apart from operating, is the housing 11 for forming the recessing passages, an ergonomic grip for the user's hand is also useful. In this assortment, the grooves 53 can be formed on the outer surface of the clamping lining 40, to promote fastening. The clamping liner 40 and the housing 11 are arranged such that in use, the palm of a user's hand rests on the upper part of the liner 40, while his fingers are wrapped below the handle portion 42. of the liner 40, just forward of the tongue projection 44. In that aspect, the clamped ratchet is air 10 is provided by a trigger groove 55, which includes a valve actuator that extends radially into the sonosus truss and a sojín trigger 56 extending through a generally restangular opening 54 in the underside of handle portion 42 of liner 40 adjacent to shoulder portion 43. Preferably, a trigger cover 57 formed of a material is also provided. resilient and flexible suitable, such as a convenient plastic covering the trigger pad 56 and has a peripheral lip 58 that couples the inner surface of the lug handle portion 42 around the the periphery of the aperture 54 can be seen better in Figures 6 and 8. From the foregoing, it can be seen that an improved air-powered ratchet tool has been provided with a plastic fastening liner which cooperates with the housing A tool to define air discharge passages and that also serves as an ergonomic fastener for the user's hand. While particular embodiments of the present invention have been illustrated and described, it will be apparent to those skilled in the art that changes and modifications may be practiced without departing from the invention in its broader aspects, therefore, the object of the appended claims is to cover all these changes and modifications that fall within the spirit and real scope of the invention * The subject matter established in the previous description and the accompanying drawings, is offered by way of illustration only and not as limitation. The astual alsanse of the invention is intended to be defined in the following claims when it is seen in its proper perspective based on prior art.