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US 7,118,181 B2Granted
Cutting tool wear sleeves and retention apparatuses
OwnerJoseph K. Frearinventor
Life of this patent
Estimating the term…
Abstract
Cutting tool assemblies and wear and retention sleeves. The assemblies may include a support block that has a sleeve-receiving hole therethrough and a cutting tool that has an elongated shank. Various configurations of sleeves are disclosed for supporting the elongated shank of the cutting bit in the support block. Such sleeve embodiments may be provided with a plurality of axially extending overlapping notches to establish segments of various degrees of interference fit between the sleeve and the support block when seated in the sleeve-receiving hole of the support block. Some sleeve embodiments are configured to permit the shank of a cutting bit to freely rotate therein. Other sleeve embodiments are configured to prevent rotation of the cutting bit shank when inserted therein.
Claims56
A cutting tool assembly, comprising:
- a support block having a sleeve-receiving hole therein;
- a cutting tool having an elongated shank;
- and
- an annular sleeve having a leading end and a trailing end, said annular sleeve comprising:
- at least one first notches in said annular sleeve, each said first notch extending axially from a corresponding first notch opening at the leading end and extending towards said trailing end;
- at least one second opposing notch adjacent at least one said first notch, each said second notch extending from a corresponding second notch opening at said trailing end and extending axially towards said leading end of said annular sleeve, said annular sleeve forming a circumferentially extending area of interference fit with said support block when said annular sleeve is seated within said sleeve-receiving hole, said circumferentially extending area of interference fit being only interrupted by said first and second notches;
- and
- a shank-receiving passage extending through said annular sleeve for receiving said elongated shank therethrough, said annular sleeve retaining said elongated shank therein while permitting rotation of said elongated shank within said shank-receiving passage.
5 more elements
A cutting tool assembly, comprising:
- a support block having a sleeve-receiving hole therein;
- a cutting tool having an elongated shank comprising a first shank portion having a first diameter, a second shank portion having a second diameter that is less than the first diameter of the first shank portion, and an end portion having the first diameter and oriented such that said second shank portion is between said first shank portion and said end portion;
- and
- an annular sleeve sized to be received on said second shank portion between said first shank portion and said end portion of said cutting tool, said annular sleeve further having a plurality of axially extending notches therein for establishing a circumferentially extending area of interference fit between said sleeve and said support block when said annular sleeve is seated within said sleeve-receiving hole, said circumferentially extending area of interference fit being interrupted only by said plurality of axially extending notches, said annular sleeve defining a shank-receiving passage for receiving said second shank portion therethrough sized to permit said second shank portion to rotate therein while retaining said elongated shank within said shank-receiving passage.
1 more element
A cutting tool assembly, comprising:
- a support block having a sleeve-receiving hole therein;
- a cutting tool having an elongated shank and an end portion;
- and
- a sleeve comprising:
- a flange;
- a body portion protruding from said flange, said body portion having a plurality of axially extending notches therein for establishing a circumferentially extending area of interference fit between said body portion and said support block when said body portion is seated within said sleeve-receiving hole, said circumferentially extending area of interference fit being interrupted only by said plurality of axially extending notches, said sleeve having a shank-receiving passage for receiving said elongated shank therethrough, said body portion having a tapered retaining end for retainingly engaging said end portion of said elongated shank while permitting rotation of said elongated shank within said shank-receiving passage.
3 more elements
A cutting tool assembly, comprising:
- a support block having a sleeve-receiving hole therethrough;
- a cutting tool having an elongated shank that has a reduced diameter portion therein;
- and
- an annular sleeve having a leading end and a trailing end, said annular sleeve comprising:
- at least two first notches in said annular sleeve, each said first notch extending axially from a corresponding first notch opening at the leading end and extending towards said trailing end;
- a second opposing notch between each said first notches, each said second notch extending from a corresponding second notch opening at said trailing end and extending axially towards said leading end of said annular sleeve, said first and second notches axially overlapping each other to form an area of overlap to establish at least two discrete partially arcuate segments of interference fit between said sleeve and said support block when said annular sleeve is seated within said sleeve-receiving hole and wherein;
- and
- a shank-receiving passage extending through said annular sleeve for receiving said elongated shank therethrough, said annular sleeve retaining said elongated shank therein while permitting rotation of said elongated shank within said shank-receiving passage and wherein said reduced diameter portion of said elongated shank coincides with said area of overlap to permit passage of debris from the shank-receiving passage through at least one of said first and second notches.
5 more elements
Dependencies are inferred from the claim text.