초록 ▼

A method and apparatus for transferring vibration of a motorized hand tool from a wrist to a forearm of a human operator is disclosed. The apparatus includes a connector that is coupled to the motorized hand tool and also includes a brace that is coupled to the forearm of the human operator and is a

A method and apparatus for transferring vibration of a motorized hand tool from a wrist to a forearm of a human operator is disclosed. The apparatus includes a connector that is coupled to the motorized hand tool and also includes a brace that is coupled to the forearm of the human operator and is also coupled to the connector.

대표청구항 ▼

1. A device (400) for transferring vibration of a motorized hand tool (S) from a hand and wrist to a forearm (FA) of a human operator when the hand grips the motorized hand tool (S) to process a surface of a workpiece (WP) with the motorized hand tool (S), the device (400) comprising: a brace (402),

1. A device (400) for transferring vibration of a motorized hand tool (S) from a hand and wrist to a forearm (FA) of a human operator when the hand grips the motorized hand tool (S) to process a surface of a workpiece (WP) with the motorized hand tool (S), the device (400) comprising: a brace (402), configured to be coupled to the forearm (FA) of the human operator and comprising: an arm wrap (406), configured to cover the forearm (FA) of the human operator; anda shell (408), made from a material more rigid than the arm wrap (406) and comprising two front legs (416) and an upper wall (414), wherein: the two front legs (416) of the shell (408) are unitary with the upper wall (414) of the shell (408);the shell (408) is coupled to the arm wrap (406); andwith the two front legs (416) positioned on opposite sides of the forearm (FA) of the human operator, the shell (408) is configured to straddle the forearm (FA) of the human operator; anda connector (404), comprising two links (422), each configured to be coupled to the motorized hand tool (S) and each pivotally connected with a respective one of the two front legs (416) of the shell (408). 2. The device (400) according to claim 1, wherein each of the front legs (416) of the shell (408) comprises a pivot joint (424), pivotally coupled to a respective one of the two links (422) of the connector (404). 3. The device (400) according to claim 2, wherein with the shell (408) straddling the forearm (FA) of the human operator, the pivot joints (424) of the front legs (416) of the shell (408) are aligned with a wrist of the human operator. 4. The device (400) according to claim 1, further comprising a damping bumper (426) mounted between the two links (422) of the connector (404) and the upper wall (414) of the shell (408). 5. The device (400) according to claim 4, further comprising a bumper-adjuster knob (428), mounted on the upper wall (414) of the shell (408) and selectively operable to adjust the position of the damping bumper (426) relative to the two links (422) of the connector (404) to change an intensity of vibrations transferred to the shell (408) from the motorized hand tool (S). 6. The device (400) according to claim 1, wherein the shell (408) further comprises two rear legs (418), unitary with the upper wall (414) of the shell (408) and configured to be positioned on opposite sides of the forearm (FA) of the human operator. 7. The device (400) according to claim 6, further comprising at least one strap (412), configured to overlay the two rear legs (418). 8. The device (400) according to claim 1, further comprising at least one strap (410) securing the shell (408) to the arm wrap (406) and securing the arm wrap (406) to the forearm (FA) of the human operator. 9. The device (400) according to claim 8, wherein the upper wall (414) of the shell (408) comprises at least one slot (420), through which one of the at least one strap (410) is received. 10. The device (400) according to claim 1, further comprising a rocker arm (520), pivotally coupling the connector (504) with the shell (506). 11. The device (400) according to claim 10, wherein: each of the front legs (512) of the shell (506) comprises a pivot joint (518);the rocker arm (520) comprises a first pivot point (524);the rocker arm (520) pivots about the pivot joints (518) of the front legs (512) of the shell (506); andthe connector (504) pivots about the first pivot point (524) of the rocker arm (520). 12. The device (400) according to claim 11, further comprising at least one shock absorber (526), biasing the rocker arm (520) relative to the shell (506). 13. The device (400) according to claim 12, wherein; the shell (506) further comprises at least one pivot support (516) unitary with and projecting from the upper wall (510) of the shell (506);the rocker arm (520) comprises a second pivot point (530); andthe at least one shock absorber (526) pivots about the pivot support (516) of the shell (506) and pivots about the second pivot point (530) of the rocker arm (520). 14. The device (400) according to claim 12, wherein the at least one shock absorber (526) comprises an oil spring piston-cylinder. 15. The device (400) according to claim 1, wherein the two links (622) of the connector (602) are co-rotatable relative to the shell (606). 16. The device (400) according to claim 1, wherein the two links (622) of the connector (602) are non-adjustably fixed relative to each other via a flange (620) coupled to and extending between the two links (622). 17. The device (400) according to claim 16, further comprising a damping bumper (626) mounted between the flange (620) and the shell (606). 18. The device (400) according to claim 17, wherein the shell (606) comprises an elongate slot (628) and the device (400) further comprises an adjusting knob (630), threadably coupled to the damping bumper (626) and selectively movable in the slot (628) to adjust a position of the damping bumper (626) relative to the shell (606) and the flange (620). 19. The device (400) according to claim 18, wherein the damping bumper (626) is wedge-shaped. 20. The device (400) according to claim 18, wherein selective movement of the damping bumper (626) adjusts a range of rotational motion of the connector (602) relative to the shell (606).