US3847235A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rolling type excavating tool
Assignee: Kennametal Inc
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Filing: 1973-10-10
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Granted: 1974-11-12
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Expires: 1993-10-10
Abstract
Abstract A rotating type excavating tool or cutter in which a cutter body is formed with a blind hole into which a spindle extends with antifriction bearings interposed between the spindle and the body with a clamp nut on the spindle at the bottom of the blind hole. Access is had to the nut for tightening the nut up during assembly, or for loosening the nut for disassembly purposes by at least one hole formed in the cutter body in the range of the bottom of the blind hole and which are plugged after the nut is tightened to prevent foreign matter from getting into the blind hole in the cutter body.
Inventors
- 👤 R Goodfellow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:34
CPC Classifications
F; F16; F16C; F16C35/00; F16C35/04; F16C35/06; E; E21; E21B; E21B10/00; E21B10/08; E21B10/22; F16C19/00; F16C19/54; F16C19/546; F16C19/547; F16C19/548; F16C19/56; F16C2352/00
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
187 words
In a rolling excavating tool; a support member, a spindle having one end fixed to said support member and projecting angularly therefrom, a cutter body having a blind hole formed therein into which said spindle extends, a first antifriction bearing having an inner race on said spindle adjacent said one end thereof and an outer race in the adjacent end of said blind hole, means stationary with said body abutting said outer race on the end facing away from said support member and means stationary with said spindle abutting the inner race on the end facing said support member, a second antifriction bearing having an inner race on said spindle near the free end thereof and an outer race in said blind hole near the bottom thereof, means stationary on the body abutting the end of the outer race of said second bearing which faces said support member, and a nut threaded on the free end of said spindle and disposed in the bottom of said blind hole and abutting the end of the inner race of said second bearing which faces away from said support member.
Claim 2
Dependent Claim
187 words
In a rolling excavating tool; a support member, a spindle having one end fixed to said support member and projecting angularly therefrom, a cutter body having a blind hole formed therein into which said spindle extends, a first antifriction bearing having an inner race on said spindle adjacent said one end thereof and an outer race in the adjacent end of said blind hole, means stationary with said body abutting said outer race on the end facing away from said support member and means stationary with said spindle abutting the inner race on the end facing said support member, a second antifriction bearing having an inner race on said spindle near the free end thereof and an outer race in said blind hole near the bottom thereof, means stationary on the body abutting the end of the outer race of said second bearing which faces said support member, and a nut threaded on the free end of said spindle and disposed in the bottom of said blind hole and abutting the end of the inner race of said second bearing which faces away from said support member.
Claim 3
Dependent Claim
23 words
A rolling excavating tool according to claim 1 in which said first antifriction bearing is larger in diameter than said second antifriction bearing.
Claim 4
Dependent Claim
33 words
A rolling excavating tool according to claim 1 in which said antifriction bearings are roller bearings and the axes of the rollers of each bearing converge in the direction toward the other bearing.
Claim 5
Dependent Claim
47 words
A rolling excavating tool according to claim 1 in which said means stationary in the body and abutting the outer race of said second antifriction bearing is a snap ring of substantial proportions, said body being formed with a groove in which said snap ring is mounted.
Claim 6
Dependent Claim
107 words
A rolling excavating tool according to claim 1 which includes a shoulder at the junction of said spindle and support member facing the free end of said spindle, and sealing disc means surrounding said spindle and clamped to said shoulder by the inner race of said first bearing, said sealing disc means cOmprising a first axially resilient disc having an axially extending marginal portion concentric with said spindle and slidably engaging the adjacent end of the outer race of said first bearing and a second axially resilient disc having an axially extending marginal portion concentric with said spindle and slidably engaging the adjacent end of said body.
Claim 7
Dependent Claim
46 words
A rolling excavating tool according to claim 1 in which at least one of the free end of the spindle and the inboard end of the nut has a taper formed thereon to serve as a pilot to assist in starting the nut on the spindle.
Claim 8
Dependent Claim
34 words
A rolling excavating tool according to claim 1 in which said spindle has an axial projection thereon, said support member having a hole receiving said projection, and means fixing said projection in said hole.
Claim 9
Dependent Claim
36 words
A rolling excavating tool according to claim 7 in which said spindle includes a collar at the end of said projection nearest said body and forming the means abutting the inner race of said first bearing.
Claim 10
Dependent Claim
67 words
A rolling excavating tool according to claim 1 in which said nut is formed with engageable means for engagement by a tool introduced through at least one pluggable hole formed in said body in the range of the bottom of said blind hole, said tool and nut when interengaged being rotatable by rotation of said body on said spindle thereby to tighten the nut on the spindle.
Claim 11
Dependent Claim
44 words
A rolling excavating tool according to claim 9 in which said engageable means exposes a region of threads on the end of said spindle for engagement by a thread deforming tool introduced into said hole after said nut has been tightened on said spindle.
Claim 12
Dependent Claim
35 words
A rolling excavating tool according to claim 9 in which said nut is in the form of an internally threaded ring and said tool engageable means comprises at least one radial recess in said nut.
Claim 13
Dependent Claim
46 words
A rolling excavating tool according to claim 9 in which said nut is in the form of an internally threaded ring and said tool engageable means comprises at least one radial notch formed in the end of the nut facing the bottom of said blind hole.
Claim 14
Dependent Claim
21 words
A rolling excavating tool according to claim 9 which includes threaded plug means threaded into and sealingly closing said pluggable hole.
Claim 15
Dependent Claim
27 words
A rolling excavating tool according to claim 9 which includes a hard wear resistant insert press fitted into said pluggable hole to close and seal said hole.
Claim 16
Dependent Claim
40 words
A rolling excavating tool according to claim 9 in which said spindle is cross drilled in the threaded end region and said nut is provided with means to receive a lock pin inserted in the cross drill in the spindle.
Claim 17
Dependent Claim
35 words
A rolling excavating tool according to claim 9 in which said spindle is slotted from the outboard end and said nut is cross-drilled to receive a lock pin passing through the slot in the spindle.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-11 | 1978-05-13 | 1978-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-11 | 1982-05-13 | 1982-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-11 | 1986-05-13 | 1986-11-12 | $7700.00 | Window Closed / Lapsed |