Cutting by use of rotating axially moving tool – With work-engaging structure other than tool or tool-support – Centering means adapted to be replaced by tool
Patent
1992-04-14
1994-01-25
Howell, Daniel W.
Cutting by use of rotating axially moving tool
With work-engaging structure other than tool or tool-support
Centering means adapted to be replaced by tool
408 835, B23B 4100
Patent
active
052810577
ABSTRACT:
A fixture is provided for reworking valve guide bores in a cylinder head of an internal combustion engine, the engine including a valve seat corresponding to each valve guide bore. The fixture includes a frame with supports for holding the cylinder head, a carriage laterally movable on the fixture frame, an arm movably attached to the carriage and extending laterally over the supports, and an alignment member or valve seat bushing pivotally mounted on the arm. A biasing cylinder is operably attached to the carriage and positioned to bias the arm toward th.e cylinder head held on the supports. The alignment member is mounted to the arm in a ball and socket arrangement so that as the alignment member is biased against the valve seat of the cylinder head, the arm exerts a balanced force on the alignment member regardless of angular movement in any direction of the alignment member or flexing of the fixture. Optimally, the alignment member includes a bore that allows removal of the valve guide boring tool and insertion of the tool for inserting a valve guide liner without releasing the biasing force holding the arm and alignment member against the valve seat.
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Exhibit A is a catalog dated 1986 published by K-Line Industries, assignee of the present application, which on pp. 8-27 disclose various valve guide inserts, tools and fixtures for reworking valve guides and for installing valve guide inserts.
Exhibit B is a catalog dated 1991 published by K-Line Industries, assignee of the present application, which on pp. 7-8 and 16-43 disclose various valve guide inserts, tools and fixtures for reworking valve guides and for installing valve guide inserts.
Howell Daniel W.
K-Line Industries, Inc.
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