Abstract: Disclosed is a lead-free glass, which is characterized by comprising 5-55 weight % of V2O5, 5-75 weight % of TeO2, 6-20 weight % of a total of RO (at least one selected from the group consisting of MgO, CaO, SrO and BaO) and 0.1-6 weight % of ZnO in a glass component, V2O5+TeO2+RO+ZnO being 70 weight % or greater. From this lead-free glass, a sealing material having fluidity which is capable of sealing at 400° C. or lower can be obtained.

Abstract: A power tool is provided with a prime mover which causes the tool to rotate and a housing which houses the prime mover. In a back-end face that is positioned on an opposite side on the housing from a tool side, a back-end groove, into which a user can position his/her web between his/her thumb and forefinger, is formed. A pair of side-face grooves, into which the user can place the thumb and forefinger, are formed in both side faces of the housing. A depth changing portion is formed in at least one of the side-face grooves, such that the depth is reduced toward the back-end face of the housing. According to this structure, even when the housing is gripped directly from the back-end face, the user can easily draw up or raise the power tool.

Abstract: Disclosed is a lead-free glass, which is characterized by comprising 5-55 weight % of V2O5, 5-75 weight % of TeO2, 6-20 weight % of a total of RO (at least one selected from the group consisting of MgO, CaO, SrO and BaO) and 0.1-6 weight % of ZnO in a glass component, V2O5+TeO2+RO+ZnO being 70 weight % or greater. From this lead-free glass, a sealing material having fluidity which is capable of sealing at 400° C. or lower can be obtained.

Abstract: A handheld electrical power tool may include a plurality of grasping portions, and at least one manipulating member to actuate and deactuate a drive source of the electrical power tool. The at least one manipulating member is positioned to correspond to all of the grasping portions.

Abstract: In a rechargeable impact driver, a light unit provided in an extension portion of a housing is provided with a substrate, an LED disposed on the substrate so as to face forward, and a lens provided in front of the LED. The LED is used for an illumination function to irradiate ahead of a bit by lighting and for a notification function to notify a decrease in a battery level of a battery pack by flashing.

Abstract: A power tool is provided with a prime mover which causes the tool to rotate and a housing which houses the prime mover. In a back-end face that is positioned on an opposite side on the housing from a tool side, a back-end groove, into which a user can position his/her web between his/her thumb and forefinger, is formed. A pair of side-face grooves, into which the user can place the thumb and forefinger, are formed in both side faces of the housing. A depth changing portion is formed in at least one of the side-face grooves, such that the depth is reduced toward the back-end face of the housing. According to this structure, even when the housing is gripped directly from the back-end face, the user can easily draw up or raise the power tool.

Abstract: A power tool is provided with a prime mover which causes the tool to rotate and a housing which houses the prime mover. In a back-end face that is positioned on an opposite side on the housing from a tool side, a back-end groove, into which a user can position his/her web between his/her thumb and forefinger, is formed. A pair of side-face grooves, into which the user can place the thumb and forefinger, are formed in both side faces of the housing. A depth changing portion is formed in at least one of the side-face grooves, such that the depth is reduced toward the back-end face of the housing. According to this structure, even when the housing is gripped directly from the back-end face, the user can easily draw up or raise the power tool.

Abstract: In a rechargeable impact driver, a light unit provided in an extension portion of a housing is provided with a substrate, an LED disposed on the substrate so as to face forward, and a lens provided in front of the LED. The LED is used for an illumination function to irradiate ahead of a bit by lighting and for a notification function to notify a decrease in a battery level of a battery pack by flashing.

Abstract: The suspension device includes a ring for hanging the power tool and a ring retaining member provided at an upper part of a housing of the power tool. The housing has a grip at a lower part thereof. The ring retaining member is configured such that the ring is movable between a standing position and a lying position and that the ring is retainable in the standing position.

Abstract: A power tool is provided with a prime mover which causes the tool to rotate and a housing which houses the prime mover. In a back-end face that is positioned on an opposite side on the housing from a tool side, a back-end groove, into which a user can position his/her web between his/her thumb and forefinger, is formed. A pair of side-face grooves, into which the user can place the thumb and forefinger, are formed in both side faces of the housing. A depth changing portion is formed in at least one of the side-face grooves, such that the depth is reduced toward the back-end face of the housing. According to this structure, even when the housing is gripped directly from the back-end face, the user can easily draw up or raise the power tool.

Abstract: A power tool is provided with a prime mover which causes the tool to rotate and a housing which houses the prime mover. In a back-end face that is positioned on an opposite side on the housing from a tool side, a back-end groove, into which a user can position his/her web between his/her thumb and forefinger, is formed. A pair of side-face grooves, into which the user can place the thumb and forefinger, are formed in both side faces of the housing. A depth changing portion is formed in at least one of the side-face grooves, such that the depth is reduced toward the back-end face of the housing. According to this structure, even when the housing is gripped directly from the back-end face, the user can easily draw up or raise the power tool.

Abstract: In a gear chamber 10, a sealing member 21 is attached to a rotary shaft 12 of an electric motor 11, and a grease return part 21a is provided on this sealing member 21. Thus, grease raked by a helical gear 12a is blown off diagonally forward with respect to a radial direction as a result of a centrifugal force, and it is possible to prevent the grease from leaking out of a ball bearing 20.

Abstract: A handheld electrical power tool may include a plurality of grasping portions, and at least one manipulating member to actuate and deactuate a drive source of the electrical power tool. The at least one manipulating member is positioned to correspond to all of the grasping portions.

Abstract: It is an object of the invention to provide an effective technique for preventing loss of a screw fastening depth regulating member removed from a machine body in a screw fastening machine. A representative screw fastening machine includes a machine body, a motor, an input shaft, an output shaft, a first clutch element, a second clutch element, a biasing member for first and second clutch elements, a screw fastening depth regulating member. The machine body has a holding part formed in an area other than the tip end region of the machine body to removably hold the screw fastening depth regulating member. The holding part is provided such that the screw fastening depth regulating member can be attached to and removed from the holding part by utilizing elastic deformation of the holding part.

Abstract: In a gear chamber 10, a sealing member 21 is attached to a rotary shaft 12 of an electric motor 11, and a grease return part 21a is provided on this sealing member 21. Thus, grease raked by a helical gear 12a is blown off diagonally forward with respect to a radial direction as a result of a centrifugal force, and it is possible to prevent the grease from leaking out of a ball bearing 20.

Abstract: A power tool is provided with a prime mover which causes the tool to rotate and a housing which houses the prime mover. In a back-end face that is positioned on an opposite side on the housing from a tool side, a back-end groove, into which a user can position his/her web between his/her thumb and forefinger, is formed. A pair of side-face grooves, into which the user can place the thumb and forefinger, are formed in both side faces of the housing. A depth changing portion is formed in at least one of the side-face grooves, such that the depth is reduced toward the back-end face of the housing. According to this structure, even when the housing is gripped directly from the back-end face, the user can easily draw up or raise the power tool.

Abstract: It is an object of the invention to provide an effective technique for preventing loss of a screw fastening depth regulating member removed from a machine body in a screw fastening machine. A representative screw fastening machine includes a machine body, a motor, an input shaft, an output shaft, a first clutch element, a second clutch element, a biasing member for first and second clutch elements, a screw fastening depth regulating member. The machine body has a holding part formed in an area other than the tip end region of the machine body to removably hold the screw fastening depth regulating member. The holding part is provided such that the screw fastening depth regulating member can be attached to and removed from the holding part by utilizing elastic deformation of the holding part.

Abstract: A cutting tool is provided for preventing dust intrusion into a guide member effectively as well as cooling a housing, thereby maintaining an excellent operability. A cutting tool has a body housing including an upper housing and a lower housing. In front of a flange portion of the lower housing, right-and-left air outlets are provided. At the front end of the lower housing, right-and-left second guiding ports are provided. Further, between an insulating cover and the lower housing, clearances which allow the outlets and the second guiding ports to communicate with each other are provided. Therefore, when the insulating cover is placed, an air passage is formed in which cooling air discharged from the air outlets moves to the front passing through the clearances, and flows into a space as the junction through the second guiding ports to be discharged to the front.

Abstract: A cutting tool is provided for preventing dust intrusion into a guide member effectively as well as cooling a housing, thereby maintaining an excellent operability. A cutting tool has a body housing including an upper housing and a lower housing. In front of a flange portion of the lower housing, right-and-left air outlets are provided. At the front end of the lower housing, right-and-left second guiding ports are provided. Further, between an insulating cover and the lower housing, clearances which allow the outlets and the second guiding ports to communicate with each other are provided. Therefore, when the insulating cover is placed, an air passage is formed in which cooling air discharged from the air outlets moves to the front passing through the clearances, and flows into a space as the junction through the second guiding ports to be discharged to the front.