Valve resurfacing device
AssigneeNeway Manufacturing, Inc.
InventorBoris R. Teper
Life of this patent
Estimating the term…
Abstract
A device for resurfacing the valve face of a poppet valve in which the pressure between a cutting surface and the valve face is controllable by the operator during the surfacing operation. A bearing case is rotatably attached to a base which is attached to a pair of gripping blocks. A cutting head is rotatably mounted on the bearing case. The cutting head, the bearing case, the base and the gripping blocks define a passage into which a valve stem is inserted. The gripping blocks are clamped in a vise which in turn clamps the valve stem in the device. When the bearing case is rotated, pressure between the cutting surface and the valve face is increased. When the cutting head is rotated, the valve face is resurfaced.
Claims20
A valve refacing device for refacing a truncated conical valve face on a head of a poppet valve having an elongate stem projecting coaxially from the valve face, comprising:
- a cutting head assembly for refacing a valve face on a poppet valve, and cutting head assembly including a housing having a passage extending axially therethrough, said passage at one end including a truncated conical recess which diverges outwardly toward said one end for accepting the head end of the valve therein with the stem projecting coaxially through said passage, said recess being defined by a surrounding truncated conical surface, and at least one cutting element mounted in said conical surface;
- gripping means including a pair of relatively movable gripping jaws for permitting stationary gripping of the valve stem between said jaws;
- support means disposed between said cutting head assembly and said gripping means for rotatably supporting said cutting head assembly for rotation relative to said gripping means about the longitudinally extending axis of said passage;
- a pressure generating arrangement cooperating with said cutting head assembly for imposing an axially directed force thereon in a direction axially away from said gripping means;
- and
- adjustable connecting means coacting between said support means and said gripping means for varying said force to adjust the contact pressure between the valve face and said cutting element when the stem is clamped between said gripping jaws.
A device for resurfacing a truncated conical valve face on a head of a poppet-type valve of a combustion engine, the valve having an elongate stem projecting coaxially from the valve face, comprising:
- a bearing case having a stepped bore extending axially therethrough, said stepped bore including a large-diameter bore portion which opens outwardly through one axial end of said case, said large-diameter bore portion defining an annular bottom wall on said case, said stepped bore also including a small-diameter bore portion which opens through the other end of said case and coaxially communicates with said bearing case large-diameter bore portion, said small-diameter bore portion defining a small-diameter bore inner wall, said inner wall having threads disposed thereon;
- a base having a stepped bore extending axially therethrough, said stepped bore including a large-diameter bore portion which opens outwardly through one axial end of said base, said large-diameter bore portion defining an inner annular top wall on said base, said stepped bore also including a small-diameter bore portion which opens through the other end of said base and coaxially communicates with said base large-diameter bore portion, said base having an outer wall with threads disposed thereon, said base threads engaged with said bearing case threads to urge said base toward and away from said bearing case as said bearing case is rotated;
- gripping means removably secured to said base and having a pair of relatively transversely movable gripping jaws for gripping the stem therein;
- and
- cutting means removably rotatably attached to said bearing case for surfacing the valve face, said cutting means having an aperture for insertion of the valve stem therethrough, said cutting means aperture, said bearing case stepped bore, said base stepped bore and said gripping means all coaxially communicating to allow a valve stem to pass therethrough and be secured by said gripping means such that as said bearing case is rotated, the contact pressure between the valve head and said cutting means is controllable.
Dependencies are inferred from the claim text.