US3612196A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rock-boring cutter
Assignee: Smith International Inc
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Filing: 1970-05-01
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Granted: 1971-10-12
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Expires: 1990-05-01
Abstract
Abstract A cutter assembly particularly adapted for use on headplates of rock-boring tools wherein a plurality of cutters are closely positioned end-to-end, the cutters being supported by journals having restricted endwise movement in their mounts, and the mounts including journal end receiving saddles and clamping means releasably overlying the journal ends to permit removal of the journals and the cutters mounted thereon away from the headplate in a direction transversely of the journals.
Inventors
- 👤 Robert L Dixon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:47
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/08; E21B10/22; E21B10/10
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
154 words
A cutter assembly including a rotary headplate having a rotational axis and a cutter mounting face normal to said rotational axis, and a plurality of rotary cutters having axes of rotation on lines extending inwardly from peripheral portions of said rotary headplate, journals supporting said cutters, certain of said cutters being in groups in closely spaced end-to-end relationship restricting axial movement of said journals, wherein the improvement comprises: said cutters comprising sleevelike members, said journals extending through and beyond the ends of and rotationally supporting said sleevelike cutter members, journal-mounting means comprising mounting posts secured to said cutter-mounting face and having upwardly open saddles, said journal ends being supported in said saddles, and clamping means removably secured to said mount posts and releasably securing said journals in said saddles, whereby said journals can be removed from said mount means in a direction normal to their longitudinal axes and without interference from adjacent cutter assemblies.
Claim 2
Dependent Claim
154 words
A cutter assembly including a rotary headplate having a rotational axis and a cutter mounting face normal to said rotational axis, and a plurality of rotary cutters having axes of rotation on lines extending inwardly from peripheral portions of said rotary headplate, journals supporting said cutters, certain of said cutters being in groups in closely spaced end-to-end relationship restricting axial movement of said journals, wherein the improvement comprises: said cutters comprising sleevelike members, said journals extending through and beyond the ends of and rotationally supporting said sleevelike cutter members, journal-mounting means comprising mounting posts secured to said cutter-mounting face and having upwardly open saddles, said journal ends being supported in said saddles, and clamping means removably secured to said mount posts and releasably securing said journals in said saddles, whereby said journals can be removed from said mount means in a direction normal to their longitudinal axes and without interference from adjacent cutter assemblies.
Claim 3
Dependent Claim
18 words
The structure in claim 1, and said mount posts being permanently secured to said cutter-mounting face by welding.
Claim 4
Dependent Claim
25 words
The structure in claim 1, and said journals having noncircular end portions positioned above said saddles, and said clamping means engaging said noncircular end portions.
Claim 5
Dependent Claim
48 words
The structure in claim 1, and each journal having on at least one end portion noncircular portions located above its saddle, and said clamping means engaging said noncircular portions at opposite sides of the longitudinal axis of the journal and above said saddle with a wedging clamping action.
Claim 6
Dependent Claim
41 words
The structure in claim 1, and said clamping means comprising means engaging said journals at opposite sides of the longitudinal axes of the journals above said saddles and exerting diagonally downward and inward pressure at each side of the journal end.
Claim 7
Dependent Claim
56 words
The structure in claim 1, and said journal mount posts having cam surfaces at opposite sides of said journal ends in spaced relation thereto above said saddles, mount blocks having wedge surfaces engaging said cam surfaces, and means for drawing the mount blocks inwardly along said cam surfaces and into wedging engagement with said journal ends.
Claim 8
Dependent Claim
73 words
The structure in claim 1, and said journal mount posts having cam surfaces at opposite sides of said saddles, said journal ends in said saddles having downwardly divergent surfaces, mount blocks engageable with said cam surfaces and said divergent surfaces, and means connected between said mount posts and mount blocks for drawing the mount blocks securely against and between said cam surfaces and said divergent surfaces to clamp said journal ends in saddles.
Claim 9
Dependent Claim
113 words
The structure in claim 1, and gage cutters located about the peripheral portion of said rotary head, said gage cutters having journals one end of each of which has an outboard end located approximately at the periphery of said rotary head, the journal mount for said outboard end comprising a base detachably secured to said rotary headplate and having a portion extending outwardly from said cutter mounting face with diminishing thickness in the form of a shirttail, a journal mount in said shirttail comprising a circular socket, the journal mount for the other end of said journal comprising a semicircular saddle, and clamping means for releasably securing said journal in said semicircular saddle.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-11 | 1975-04-12 | 1975-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-11 | 1979-04-12 | 1979-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-11 | 1983-04-12 | 1983-10-12 | $7700.00 | Window Closed / Lapsed |