Machine tool for dressing the end face of an engine cylinder liner

Claim 2

A machine tool for dressing the end face of an upright engine cylinder liner, comprising: (a) a machine base stationarily positioned within the end portion of the liner, contiguous to the end face to be dressed, (b) an upright stub shaft mounted on said base with its longitudinal axis coincident with that of the liner, and whereof an upper end portion extends above said base, (c) a diametrically disposed beam on the upper end of said shaft so that the beam is rotatable about said axis above said end face. (d) means for rotating said beam about said axis, (e) metal-dressing tool devices mounted on said beam for presentation to said end face, (f) a plurality of guide rollers on said beam, and (g) said base having a circumferential runway groove within which said guide rollers ride free to rotate but engage with said base.

Claim 3

A machine tool according to claim 1 wherein said beam consists of a pair of parallel spaced-apart twin members and the means for rotating said beam comprise a motor driven key emplaced between said twin members.

Claim 4

A machine tool according to claim 2 wherein said metal-dressing tool devices comprise a tool-carrier block mounted between said twin members and movable longitudinally therebetween.

Claim 5

A machine tool according to claim 3 wherein said tool devices include feed means for moving said block relative to said twin members, and said feed means comprise a nut on said block, a lead screw which threads through said nut and is borne by its ends on said beam and means to rotate said lead screw.

Claim 6

A machine tool according to claim 1 wherein said metal-dressing tool devices include a grinding mechanism movably mounted on said beam.

Claim 7

A machine tool according to claim 1 wherein said base includes at least one clamping screw threaded within said base and adapted to be tightened against the interior of the liner.

Claim 8

A machine tool for dressing the end face of an upright engine cylinder liner having an interior polished cylindrical surface adapted to reciprocably receive a piston comprising: (a) a machine base stationarily positioned within the end portion of the liner, contiguous to the end face to be dressed, said base including a wheel adapted to be entered into the liner and held upon a circumferential step therein co-axially therewith by releaseably mounting means not engaging the polished cylindrical surface to secure the machine in operable position relative to the liner, (b) an upright stub mounted on said base with its longitudinal axis coincident with that of the liner, and whereof an upper end portion extends above said base, (c) a diametrically disposed beam mounted substantially mid length on the upper end of said shaft for rotation relative to said base so that the beam is rotatable about said axis above said end face, (d) means for rotating said beam about said axis and said means carried on a mounting separate from said base, (e) metal-dressing tool devices mounted on said beam for presentation to said end face. (f) a plurality of downwardly depending frusto-conical guide rollers carried on said beam at a location spaced laterally from said upright stub, and (g) said base having a circumferential frusto-conical runway groove within which said guide rollers ride free to rotate but engaged with said base.

Claim 9

A machine tool for dressing the end face of an upright engine cylinder liner having an interior polished cylindrical surface adapted to reciprocably receive a piston comprising: (a) a machine base stationarily positioned within the end portion of the liner, contiguous to the end face to be dressed, said base including a wheel adapted to be entered into the liner and held upon a circumferential step therein co-axially therewith by releaseably mounting means not engaging the polished cylindrical surface to secure the machine in operable position relative to the liner, (b) an upright stub mounted on said base with its longitudinal axis coincident with that of the liner, and whereof an upper end portion extends above said base, (c) a diametrically disposed beam mounted substantially mid length on the upper end of said shaft for rotation relative to said base so that the beam is rotatable about said axis above said end face, (d) means for rotating said beam about said axis and said means carried on a mounting separate from said base, (e) metal-dressing tool devices mounted on said beam for presentation to said end face. (f) a plurality of downwardly depending frusto-conical guide rollers carried on said beam at a location spaced laterally from said upright stub, and (g) said base having a circumferential frusto-conical runway groove within which said guide rollers ride free to rotate but engaged with said base.