BRIEF DESCRIPTION OF THE DRAWINGS
The drawing show:
FIG. 1 a side view of an electrical hand-held saw according to the present invention with released suction device and released auxiliary guide;
FIG. 2 a side view of the inventive electrical hand-held saw similar to that of FIG. 1 with the suction device attached.
FIG. 3 a front view of the suction device taken alone in direction III in FIG. 1;
FIG. 4 a front view of the inventive electrical hand-held saw in direction IV in FIG. 2; and
FIG. 5 a longitudinal cross-sectional view along line V-V in FIG. 4.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
FIG. 1 shows a front portion of an electrical hand-held saw 2 according to the present invention which is formed as a saber saw. The saw 2 has a housing 4 that forms a neck 8 in the direction of an end surface 6 facing in an operational direction. The neck 8 serves as a handle and is provided to this end with a rubber layer 10 on its outer side. The rubber layer 10 forms at the end surface 6 a collar 12 that prevents slipping of a holding hand in the direction of the saw blade 14.
The saw blade 14 projects from the housing neck 8 at the housing end side 6 and reciprocates, along a stroke direction H, substantially parallel to the longitudinal extent of the housing neck 8 and the housing 4 in order to be able to perform a cut in a cutting direction S during the saw operation. For aspiration of the removable material, a suction device 16 is attached to the saw housing 4.
The suction device 16 has a hood section 18 that forms, on the saw side 20, a bearing region 22 that adjoins the end side 6 of the saw housing 4, as shown with a mounting arrow M1 in FIG. 2. The bearing region 22 is adapted to the profile of the end side 6 and surrounds the saw blade 14 when adjoining the end side 6. With reference to a substantially horizontal position of the electrical hand-held saw 2 which is shown in FIGS. 1-2 and which corresponds to a predetermined position during conventional operation, there is provided, beneath the bearing region 22, a connection union 24 to which a suction conduit 26, which connects the suction device 16 with a suction apparatus, e.g., in the form of an industrial dust collector (not shown). is connectable.
For guiding the electrical hand-held saw 2 during the cutting process, there is provided a removable guide 28. The guide 28 has plate-shaped guide means 30 pivotally supported on a connection device 32. The connection device 32 is securable on the housing neck 8, with the guide means 30 adjoining an outer side 34 of the hood section 18, as shown with a mounting arrow M2 in FIG. 2. In this way, the suction device 16 is releasably held on the saw neck 4 by the guide 28.
As shown in FIGS. 3-4, the suction device 16 has, on its outer side 34, a suction opening 36 through which the saw blade 14 projects in the completely assembled condition. On the outer opening 36, there is formed a relief-forming receptacle 38, which is adjoined by the guide means 30, as shown in FIGS. 4-5. Thereby the suction device 16 is held by the guide 28 on the housing neck 4 reliably and backlash-free to a most possible extent. Further, in this way, the outer opening 36 up to a through-opening 39 of the guide means 30, through which the saw blade 14 projects from the suction device 16, is closed to a most possible extent.
Two holding elements 42 project inward from an inner side 40 of the hood section 18. The holding elements 42 are provided, respectively, with recesses 44. The recesses 44 are adapted in shape and size to the connection rods 46 having a circular cross-section, as shown in FIG. 4. Thereby, during the assembly, the suction device 16 can first be positioned on the guide 28 to be secured on the housing neck 4 thereby.
As shown in FIG. 5, the two connection rods 46 of the connection device 32 are positioned in the corresponding recesses 48 of the saw housing 4 and are secured with locking means 50. In this position the guide 28, the bearing region 22 is pressed by the guide means 30, at least partially against the rubber layer 10 or the collar 12. In this way, the hood section 18 forms a suction chamber 52 that is sealed relatively well towards the outside. The suction chamber 52 is connected with the suction conduit 26 via a suction opening 54 of the connection union 24, which is located in the bearing region 22. In this way, during an operation, the non-shown dust suction apparatus creates underpressure in the suction chamber 52 via the suction conduit 26. Thereby, the dirt and dust which are carried in the suction chamber 52 by the saw blade 14 is delivered through the suction opening 54 to the suction conduit 26. in addition, the underpressure in the suction chamber 52 provides for suction of dirt and dust through the through-opening 39 from outside.
Though the present invention was shown and described with references to the preferred embodiment, such is merely illustrative of the present invention and is not to be construed as a limitation thereof and various modifications of the present invention will be apparent to those skilled in the art. It is therefore not intended that the present invention be limited to the disclosed embodiment or details thereof, and the present invention includes all variations and/or alternative embodiments within the spirit and scope of the present invention as defined by the appended claims.
Patent Application
20070251104
