Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
189 words
A bit and block assembly comprising: a. a block movable along a mine face, the block being provided with a substantially cylindrical bore, b. a sleeve rotatively mounted in the block bore, the sleeve being provided with a substantially cylindrical bore and including an enlarged head, c. a point-attack bit for removing material from the mine face including: 1. an elongate shank mounted in the sleeve bore, 2. an enlarged bit head integral and coaxial with the shank, the bit head having a leading end and a trailing end, and 3. a cutting tip on the leading end of the bit head penetrating the material being mined with a picking action upon travel of the bit along a mine face, and d. a plurality of protuberances on and extending outwardly from the periphery of the sleeve head, the protuberances extending generally longitudinally of and at an angle to the longitudinal axis of the sleeve, the protuberances providing frictional contact with the material being mined to effect positive turning of the sleeve, and hence of the bit in the sleeve, upon picking of the mine face by the bit head.
Claim 2
Dependent Claim
189 words
A bit and block assembly comprising: a. a block movable along a mine face, the block being provided with a substantially cylindrical bore, b. a sleeve rotatively mounted in the block bore, the sleeve being provided with a substantially cylindrical bore and including an enlarged head, c. a point-attack bit for removing material from the mine face including: 1. an elongate shank mounted in the sleeve bore, 2. an enlarged bit head integral and coaxial with the shank, the bit head having a leading end and a trailing end, and 3. a cutting tip on the leading end of the bit head penetrating the material being mined with a picking action upon travel of the bit along a mine face, and d. a plurality of protuberances on and extending outwardly from the periphery of the sleeve head, the protuberances extending generally longitudinally of and at an angle to the longitudinal axis of the sleeve, the protuberances providing frictional contact with the material being mined to effect positive turning of the sleeve, and hence of the bit in the sleeve, upon picking of the mine face by the bit head.
Claim 3
Dependent Claim
22 words
an enlarged bit head integral and coaxial with the shank, the bit head having a leading end and a trailing end, and
Claim 4
Dependent Claim
22 words
an enlarged bit head integral and coaxial with the shank, the bit head having a leading end and a trailing end, and
Claim 5
Dependent Claim
27 words
A bit and block assembly as defined in claim 1, in which: e. the protuberances consist of fins that are relatively circumferentially spaced on the sleeve head.
Claim 6
Dependent Claim
98 words
a cutting tip on the leading end of the bit head penetrating the material being mined with a picking action upon travel of the bit along a mine face, and d. a plurality of protuberances on and extending outwardly from the periphery of the sleeve head, the protuberances extending generally longitudinally of and at an angle to the longitudinal axis of the sleeve, the protuberances providing frictional contact with the material being mined to effect positive turning of the sleeve, and hence of the bit in the sleeve, upon picking of the mine face by the bit head.
Claim 7
Dependent Claim
98 words
a cutting tip on the leading end of the bit head penetrating the material being mined with a picking action upon travel of the bit along a mine face, and d. a plurality of protuberances on and extending outwardly from the periphery of the sleeve head, the protuberances extending generally longitudinally of and at an angle to the longitudinal axis of the sleeve, the protuberances providing frictional contact with the material being mined to effect positive turning of the sleeve, and hence of the bit in the sleeve, upon picking of the mine face by the bit head.
Claim 8
Dependent Claim
27 words
A bit and block assembly as defined in claim 1, in which: e. the protuberances consist of individual knobs in circumferentially spaced rows on the sleeve head.
Claim 9
Dependent Claim
73 words
A bit And block assembly as defined in claim 1, in which: e. the block has a front face and an adjacent outer face, the block bore extending through the block front face, f. the sleeve head with its protuberances, engages the block front face outwardly of the block bore to position the sleeve in the block, and g. the bit head engages the sleeve head to position the bit in the sleeve.
Claim 10
Dependent Claim
130 words
A bit and block assembly as defined in claim 1, in which: e. the protuberances are circumferentially spaced about the periphery of the sleeve head to provide longitudinal passages therebetween extending from its leading end to its trailing end, the material being mined being movable through the passages and engageable with the protuberances, f. the block has a front face and an adjacent outer face, the block bore extending through the block front face, and g. the sleeve head with its protuberances engages the block front face outwardly of the block bore to position the sleeve in the block, and extends laterally outwardly beyond the outer block face to enable discharge of the material being mined from the passages between the circumferentially spaced protuberances, and past the outer block face.