| CPC E01C 23/088 (2013.01) [B28D 1/188 (2013.01); E01C 23/127 (2013.01); E21C 35/191 (2020.05); E21C 35/1933 (2013.01)] | 5 Claims |
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1. A method for milling a surface comprising the steps of:
a) providing a base comprising:
i) a base lower portion comprising a front, a rear, a length extending from the front to the rear, and a width extending perpendicular to the length; and
ii) a base upper portion extending from the base lower portion and comprising a front comprising a front face, a rear comprising a rear face, a length extending from the front to the rear and parallel to the base lower portion length, a width parallel to the base lower portion width, and an interior wall forming a base upper portion opening extending through the base upper portion from the front face to the rear face, the base upper portion opening comprising a front end adjacent the front face, a rear end adjacent the rear face, and an inner diameter extending across the base upper portion opening;
b) providing a sleeve comprising a forward direction and a rearward direction, the sleeve further comprising:
i) a head comprising a front end, a rear end located in a rearward direction from the front end, a length extending from the front end to the rear end, a head diameter, and an exterior surface;
ii) a shank extending in the rearward direction from the head rear end, the shank comprising a shank front end adjacent to the head rear end, a shank rear end located in the rearward direction from the shank front end, a length extending from the shank front end to the shank rear end, an outer diameter, an exterior surface, and a deflectable rear section located at the shank rear end, the deflectable rear section comprising one or more slots, the one or more slots having a slot front end, a slot rear end located at the shank rear end, and a length extending from the slot front end to the slot rear end;
iii) a sleeve hole passing through the head and shank of the sleeve to form a hollow sleeve interior, the hollow sleeve interior comprising a sleeve interior surface and a sleeve inner diameter;
wherein the sleeve shank is configured to be removably inserted into the base upper portion opening;
wherein the deflectable rear section is configured to deflect inwardly from a relaxed position to a constricted position as the rear end of the sleeve shank is inserted into the front end of the base upper portion opening;
wherein the deflectable rear section is configured to move outwardly and at least partially return to the relaxed position after the rear end of the sleeve shank exits the rear end of the base upper portion opening;
c) securing the sleeve shank to the base by inserting the rear end of the sleeve shank into the front end of the base upper portion opening and then out of the rear end of the base upper portion opening, wherein the deflectable rear section moves from the relaxed position to the constricted position as the rear end of the sleeve shank is inserted into the front end of the base upper portion opening, wherein the deflectable rear section partially but not fully returns to the relaxed position as the rear end of the sleeve shank exits the rear end of the base upper portion opening, and further wherein the sleeve is interference fit into the base upper portion opening;
d) securing a milling bit to the sleeve by inserting the milling bit into the sleeve hole; and
e) rotating the base (and the sleeve shank and the milling bit secured to the base), on a drum of a milling machine,
wherein the deflectable rear section comprises a flange, the flange protruding outwardly as compared to an indented section of the shank immediately in the forward direction as compared to the flange, the indented section comprising a recess engaging the rear end of the base upper portion opening, and further wherein when the deflectable rear section partially returns to the relaxed position, the flange is located in the rearward direction relative to the base upper portion opening.
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