Adapter assembly for impact tool units with rotatable or oscillatable bits
OwnerVernon L. Priceinventor
Life of this patent
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Abstract
An adapter assembly incorporating the lower chuck end of a rotary impact tool unit, the support means thereof, and the tool bit extending from the lower end thereof. The impact tool unit is of the general type in which the impact motor is not connected directly to the outer support housing but is mounted for upward axial movement in the housing, as a result of recoil forces, to substantially reduce shock and vibration transmitted to the operator who holds the unit by means of a handle carried by the housing. The adapter assembly cooperates with the tool bit to hold it down against the work but permits the tool bit to rotate or oscillate about its axis or to remain in a stationary position angularly relative to the axis.
Claims6
In combination a two-body adaptation of an impact tool device having a first body comprising a main support, a tool bit having a shaft and a workhead, means for mounting said tool bit for rotational and axial movement, said tool bit having a shoulder disposed at a location along its shaft before its workhead, and a second body comprising separate means cooperating with the tool bit for imparting both axial impact and rotational forces thereto including
- an adapter assembly mounted on said main support body and comprising:
- a bearing support on said main support in a fixed axial position and carrying a bearing through which said tool bit axially extends with its shoulder below the bearing,
- said bearing including means for preventing rotation of said bit relative thereto while allowing the bit to slide axially therein;
- said bearing including thrust bearing means for engaging said tool bit shoulder so as to hold the tool bit down against the work under impact but permit turning of the bit about its axis and
- an elongated, slotted chuck forming a part of said second body which extends through said fixed main bearing support of said first body for axial movement relative thereto to prevent transmission of impact forces to the support.
Dependencies are inferred from the claim text.