Back to results
US 5,002,134 AGranted
Rotary impacting apparatus
AssigneeYamada Juki Co., Ltd.
InventorSakuji Yamada
Life of this patent
Estimating the term…
Abstract
A rotary impacting apparatus comprises rotary member drivingly rotated about a rotational axis within a casing. An impact member is loosely held by the rotary member so as to be movable toward and away from the rotational axis within a limited range. A holder mounted to the casing slidably supports a reciprocative member to allow movement thereof toward and away from the rotational axis within a limited range. The reciprocative member has a contact surface which interferes with the impact member rotating about the rotational axis when the reciprocative member is positioned closest to the rotational axis.
Claims13
A rotary impacting apparatus comprising:
- a casing;
- a rotary member drivingly rotated within said casing about a rotational axis and provided with arresting means at a position spaced from said rotational axis;
- at least one impact member loosely held by said arresting means for rotation with said rotary member about said rotational axis, said arresting means allowing said impact member to move toward and away from said rotational axis within a limited range but always holding all portions of said impact member spaced from said casing radially of said rotary member;
- and
- a reciprocative member supported to move toward and away from said rotational axis within a limited range, said reciprocative member having a contact surface which interferes with said impact member rotating about said rotational axis when said reciprocative member is positioned closest to said rotational axis, wherein
- said impact member is circularly columnar and rotatable about a self-rotational axis;
- said rotary member comprises a pair of side flanges joined by an intermediate portion;
- and
- said arresting means comprises a pair of identical holes formed in said side flanges and elongated toward said rotational axis for loosely receiving said impact member, each of said holes having a width substantially corresponding to the diameter of said impact member, each said hole having a first arcuate portion for limiting the movement of said impact member away from said rotational axis and a second arcuate portion for limiting the movement of said impact member toward said rotational axis.
6 more elements
A rotary impacting apparatus comprising:
- a casing;
- a rotary member drivingly rotated within said casing about a rotational axis and provided with arresting means at a positions spaced from said rotational axis;
- at least one impact member loosely held by said arresting means for rotation with said rotary member about said rotational axis, said arresting means allowing said impact member to move toward and away from said rotational axis within a limited range but always holding all portions of said impact member spaced from said casing radially of said rotary member;
- and
- a reciprocative member supported to move toward and away from said rotational axis within a limited range, said reciprocative member having a contact surface which interferes with said impact member rotating about said rotational axis when said reciprocative member is positioned closest to said rotational axis, wherein
- said impact member is circularly columnar and rotatable about a self-rotational axis;
- said rotary member comprises a pair of side flanges joined by an intermediate portion;
- and
- said arresting means is in the form of a circular reception bore which is larger in diameter than said impact member, said reception bore being provided by a pair of completely circular holes formed in said side flanges as well as by an incompletely circular hole formed in said intermediate portion, said incompletely circular hole having an opening which is directed radially outwardly of said rotary member and has a width smaller than the diameter of said impact member so that said impact member projects out of said opening radially outwardly of said rotary member for interference with said contact surface of said reciprocative member.
6 more elements
Dependencies are inferred from the claim text.