초록

A strap assembly including at least one strap configured to removably mount on a handle portion of a drill, to removably twist 180° and mount on a rear end portion of the drill, and to removably mount on a rear body portion of the drill.

대표청구항 ▼

A strap assembly including at least one strap configured to removably mount on a handle portion of a drill, to removably twist 180° and mount on a rear end portion of the drill, and to removably mount on a rear body portion of the drill. e hydraulic shock absorber according to claim 4, further compr

A strap assembly including at least one strap configured to removably mount on a handle portion of a drill, to removably twist 180° and mount on a rear end portion of the drill, and to removably mount on a rear body portion of the drill. e hydraulic shock absorber according to claim 4, further comprising an extension side pilot operated type damping valve and a compression side pilot operated type damping valve, each damping valve being disposed in said hydraulic fluid passage on the respective upstream side of the associated upstream port of the piston bolt portion and including a disk valve which opens depending on the pressure of the hydraulic fluid applied thereto thereby generating a damping force and including a pilot chamber formed on the respective downstream side of said disk valve and communicating with said upstream port.6. A damping force control type hydraulic shock absorber according to claim 1, further comprising: a first bearing situated in said tubular member so that said plunger is slidably guided by the first bearing; and a second bearing situated in said attracting member, wherein said solenoid-operated driving mechanism includes an actuating rod having opposite end portions, a first end portion of the actuating rod being connected to an end portion of the plunger on the side of said attracting member, and a second end portion of said actuating rod extending through said attracting member and slidably guided by said second bearing. 7. A solenoid-operated driving apparatus comprising: a coil provided in a casing; a tubular member provided in said coil at a first end portion of said coil to form a portion of a magnetic path for the magnetic flux created when said coil is energized, said tubular member having a bottom wall; a plunger slidably guided in said tubular member so that a space filled with a hydraulic fluid is defined between said plunger and said bottom wall of said tubular member, said plunger having a passage axially extending therethrough, and said passage having an orifice; and an attracting member provided in said coil at a second end portion of said coil opposite said first end portion to form another portion of the magnetic path when said coil is energized so as to attract said plunger, said plunger having a small-diameter main body portion slidably guided in said tubular member, and having a large-diameter attracted portion located within said coil and between said small-diameter main body portion and said attracting member with respect to a longitudinal axis of said tubular member, and said large-diameter attracted portion having a surface facing said attracting member, and said attracting member having a tubular projection provided on a surface thereof that faces said attracted portion of said plunger so that said attracted portion enters or withdraws from said tubular projection. 8. A solenoid-operated driving apparatus according to claim 7, further comprising: a first bearing situated in said tubular member so that said plunger is slidably guided by the first bearing; and a second bearing situated in said attracting member, wherein said solenoid-operated driving apparatus further includes an actuating rod having opposite end portions, a first end portion of the actuating rod being connected to an end portion of the plunger on the side of said attracting member, and a second end portion of said actuating rod extending through said attracting member and slidably guided by said second bearing. 9. A damping force control type hydraulic shock absorber according to claim 2, said piston being connected to said piston rod through a piston bolt, said piston bolt having a cylindrical portion extending through said piston and said piston bolt having a larger-diameter portion, said casing being connected to both said piston bolt and said piston rod.10. A damping force control type hydraulic shock absorber according to claim 1, wherein said attracted portion has an attracted surface facing said attracting member, and said attracting member has an attracting surface facing said attracted surface of said attracted portion, said attracted surface and said attracting surface being substantially parallel and