Tool driving or impacting – Processes
Reexamination Certificate
2008-09-26
2010-11-16
Smith, Scott A. (Department: 3721)
Tool driving or impacting
Processes
C173S029000, C173S128000, C173S132000, C279S019300, C279S093000
Reexamination Certificate
active
07832495
ABSTRACT:
A tool assembly provided with a housing defining a chamber, and a reciprocating work tool arranged in the chamber, is disclosed. A tool retention member has an aperture through which the work tool extends. Engaging structure including mutually engaging protrusions on the housing and the tool retention member is configured to permit engagement of the tool retention member with the housing by relative rotation of the tool retention member and the housing. Retention structure on the work tool is configured to prevent removal of the work tool from the housing when the tool retention member is engaged with the housing. A locking structure is configured to lock the tool retention member and housing against relative rotation. A prestressing structure is located between the protrusions on the housing and a portion of the tool retention member and is configured to urge the tool retention member away from the housing.
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Caterpillar Inc
Finnegan, Henderson, Farabow, Garrett & Dunner LLC
Smith Scott A.
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