Method for establishing o-ring seal grooves

Claim 1

THE METHOD OF ESTABLISHING AN UNINTERRUPTED O-RING RECEIVING GROOVE ENTERING THE TOP SURFACE OF A PIECE OF WORK AND HAVING A FLAT BOTTOM WALL AND LATERALLY INWARDLY AND UPWARDLY INCLINED SIDE WALLS, WHICH INVOLVES; FIRST, SELECTING THE FIRST FISHTAIL MILLING CUTTER HAVING AN ELONGATE VERTICAL STEM, THE RADIAL EXTENT OF WHICH IS LESS THAN THE DIFFERENCE BETWEEN THE MAJOR AND THE MINOR LATERAL EXTENT OF THE GROOVE TO BE ESTABLISHED, AND HAVING A HEAD WITH OUTWARDLY PROJECTING, CUTTER BLADES WITH UPWARDLY AND RADIALLY INWARDLY INCLINED CUTTING EDGES DISPOSED AT THE ANGLE OF THE SIDE WALLS OF SAID GROOVE, THE MAJOR DIAMETRIC EXTENT OF THE HEAD BEING EQUAL TO OR LESS THAN THE MINOR LATERAL EXTENT OF SAID GROOVE, THE AXIAL EXTENT OF THE HEAD BEING EQUAL TO OR GREATER THAN THE DEPTH OF SAID GROOVE; NEXT, ARRANGING THE FIRST MILLING CUTTER ABOVE THE WORK ON A VERTICAL AXIS INTERSECTING THE MEANS LONGITUDINAL AXIS LINE ON THE SURFACE OF THE WORK ALONG WHICH SAID GROOVE IS TO BE ESTABLISHED; NEXT, ROTATING SAID FIRST CUTTER AND RECIPROCATING IT LONGITUDINALLY ALONG SAID LINE A DISTANCE EQUAL TO OR GREATER THAN THE MAJOR LATERAL EXTENT OF SAID GROOVE AND LOWERING IT INTO THE WORK TO A DEPTH TO WHICH THE GROOVE WILL ENTER SAID WORK, TO ESTABLISH A PILOT GROOVE; NEXT, REMOVING SAID FIRST CUTTER FROM THE PILOT GROOVE; NEXT, SELECTING A SECOND FISHTAIL CUTTER HAVING AN ELONGATE, VERTICAL STEM THE DIAMETER OF WHICH IS LESS THAN THE MINOR LATERAL EXTENT OF SIAD GROOVE AND HAVING A HEAD WITH LATERALLY OUTWARDLY PROJECTING, CUTTING BLADES WITH UPWARDLY AND RADIALLY INWARDLY INCLINED CUTTING EDGES DISPOSED AT THE ANGLE OF THE SIDE WALLS OF SAID GROOVE, THE MAJOR DIAMETRIC EXTENT OF THE HEAD OF SAID SECOND CUTTER BEING EQUAL TO THE MAJOR LATERAL EXTENT OF SAID GROOVE AND THE MINOR DIAMETRIC EXTENT OF SAID HEAD BEING EQUAL TO OR LESS THAN THE MINOR LATERAL EXTENT OF SAID GROOVE; NEXT, POSITIONING SAID SECOND CUTTER STATICALLY ABOVE THE WORK WITH THE PLANE OF ITS BLADES PARALLEL WITH THE CENTRAL LONGITUDINAL AXIS OF THE PILOT GROOVE; NEXT, LOWERING SAID SECOND CUTTER INTO SAID PILOT GROOVE; NEXT, ROTATING SAID SECOND CUTTER; NEXT, ADVANCING SAID SECOND CUTTER LONGITUDINALLY ALONG AND ABOUT THE MEANS LONGITUDINAL AXIS LINE ON THE SURFACE OF THE WORK ALONG WHICH SAID GROOVE IS TO BE ESTABLISHED; NEXT, STOPPING SAID SECOND CUTTER WITH THE PLANE OF ITS BLADES PARALLEL WITH THE LONGITUDINAL AXIS OF THE GROOVE; AND, FINALLY, SHIFTING SAID SECOND CUTTER VERTICALLY FROM WITHIN THE GROOVE.

Claim 2

THE METHOD OF ESTABLISHING AN UNINTERRUPTED O-RING RECEIVING GROOVE ENTERING THE TOP SURFACE OF A PIECE OF WORK AND HAVING A FLAT BOTTOM WALL AND LATERALLY INWARDLY AND UPWARDLY INCLINED SIDE WALLS, WHICH INVOLVES; FIRST, SELECTING THE FIRST FISHTAIL MILLING CUTTER HAVING AN ELONGATE VERTICAL STEM, THE RADIAL EXTENT OF WHICH IS LESS THAN THE DIFFERENCE BETWEEN THE MAJOR AND THE MINOR LATERAL EXTENT OF THE GROOVE TO BE ESTABLISHED, AND HAVING A HEAD WITH OUTWARDLY PROJECTING, CUTTER BLADES WITH UPWARDLY AND RADIALLY INWARDLY INCLINED CUTTING EDGES DISPOSED AT THE ANGLE OF THE SIDE WALLS OF SAID GROOVE, THE MAJOR DIAMETRIC EXTENT OF THE HEAD BEING EQUAL TO OR LESS THAN THE MINOR LATERAL EXTENT OF SAID GROOVE, THE AXIAL EXTENT OF THE HEAD BEING EQUAL TO OR GREATER THAN THE DEPTH OF SAID GROOVE; NEXT, ARRANGING THE FIRST MILLING CUTTER ABOVE THE WORK ON A VERTICAL AXIS INTERSECTING THE MEANS LONGITUDINAL AXIS LINE ON THE SURFACE OF THE WORK ALONG WHICH SAID GROOVE IS TO BE ESTABLISHED; NEXT, ROTATING SAID FIRST CUTTER AND RECIPROCATING IT LONGITUDINALLY ALONG SAID LINE A DISTANCE EQUAL TO OR GREATER THAN THE MAJOR LATERAL EXTENT OF SAID GROOVE AND LOWERING IT INTO THE WORK TO A DEPTH TO WHICH THE GROOVE WILL ENTER SAID WORK, TO ESTABLISH A PILOT GROOVE; NEXT, REMOVING SAID FIRST CUTTER FROM THE PILOT GROOVE; NEXT, SELECTING A SECOND FISHTAIL CUTTER HAVING AN ELONGATE, VERTICAL STEM THE DIAMETER OF WHICH IS LESS THAN THE MINOR LATERAL EXTENT OF SIAD GROOVE AND HAVING A HEAD WITH LATERALLY OUTWARDLY PROJECTING, CUTTING BLADES WITH UPWARDLY AND RADIALLY INWARDLY INCLINED CUTTING EDGES DISPOSED AT THE ANGLE OF THE SIDE WALLS OF SAID GROOVE, THE MAJOR DIAMETRIC EXTENT OF THE HEAD OF SAID SECOND CUTTER BEING EQUAL TO THE MAJOR LATERAL EXTENT OF SAID GROOVE AND THE MINOR DIAMETRIC EXTENT OF SAID HEAD BEING EQUAL TO OR LESS THAN THE MINOR LATERAL EXTENT OF SAID GROOVE; NEXT, POSITIONING SAID SECOND CUTTER STATICALLY ABOVE THE WORK WITH THE PLANE OF ITS BLADES PARALLEL WITH THE CENTRAL LONGITUDINAL AXIS OF THE PILOT GROOVE; NEXT, LOWERING SAID SECOND CUTTER INTO SAID PILOT GROOVE; NEXT, ROTATING SAID SECOND CUTTER; NEXT, ADVANCING SAID SECOND CUTTER LONGITUDINALLY ALONG AND ABOUT THE MEANS LONGITUDINAL AXIS LINE ON THE SURFACE OF THE WORK ALONG WHICH SAID GROOVE IS TO BE ESTABLISHED; NEXT, STOPPING SAID SECOND CUTTER WITH THE PLANE OF ITS BLADES PARALLEL WITH THE LONGITUDINAL AXIS OF THE GROOVE; AND, FINALLY, SHIFTING SAID SECOND CUTTER VERTICALLY FROM WITHIN THE GROOVE.