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US 4,147,462 AGranted
Machine for finishing valve seats
AssigneeNeway Manufacturing, Inc.
InventorsJ. Robert Appleby, Frank P. Horvath, William J. Morris, deceased
Life of this patent
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AssigneeNeway Manufacturing, Inc.
InventorsJ. Robert Appleby, Frank P. Horvath, William J. Morris, deceased
Estimating the term…
A valve-seat cutting machine having a vertically movable support structure with a vertically elongated spindle assembly mounted thereon. The spindle assembly includes an elongated pilot adapted to be axially inserted into a bore formed in an engine block. A cutting tool is rotatably positioned in surrounding relationship to the pilot rod and is driven from a substantially coaxially aligned driving sleeve, which sleeve is connected to the tool by an intermediate coupling which permits substantially universal movement so that the tool can undergo angular and/or lateral misalignment relative to the rotational axis of the driving sleeve. The pilot rod, which moves angularly or laterally with the cutting tool, is also connected by a similar joint structure to an actuator which permits the pilot rod to be slidably moved relative to the cutting tool. A compression transmitting structure extends through the latter-mentioned joint structure to permit a pushing force to be imposed on the pilot rod. The support structure has a locking plate horizontally slidably mounted thereon, which locking plate has a swivel connection with the cutting tool. When the pilot rod has been inserted into the valve bore and the tool has assumed an aligned position relative thereto, in which position the tool may be angularly and/or laterally misaligned relative to the driving sleeve, then a locking actuator is energized to fixedly hold the locking plate in its adjusted position, thereby holding the cutting tool in its adjusted position during the valve-seat cutting operation.
In a valve-seat finishing machine, including a frame, a head structure slidably supported on said frame for linear reciprocating movement along a selected direction, and at least one spindle assembly mounted on said head structure and extending substantially parallel to said selected direction for permitting finishing of a valve seat, said spindle assembly including a driving member supported for rotation about a driving axis which is substantially parallel with said selected direction, a tool which is substantially aligned with said driving member and is rotatable about a tool axis which is approximately aligned with said driving axis, and coupling means drivingly connecting said driving member to said tool (1) for permitting driving of said tool and (2) for permitting said tool axis to move into an adjusted position wherein it is angularly and laterally misaligned with respect to said driving axis, the improvement comprising releasable locking means for selectively holding said tool in said adjusted position, whereby rotation of said tool effects finishing of the valve seat.
A spindle assembly, particularly for finishing a valve seat, comprising in combination:
Dependencies are inferred from the claim text.