US3856358A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wear-resistant inserts for in surfaces of the links of cutter chains and the like to retard wear thereof
Assignee: Cincinnati Mine Machinery Co
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Filing: 1973-04-27
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Granted: 1974-12-24
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Expires: 1993-04-27
Abstract
Abstract Hard wear resistant inserts for those surfaces of the links of cutter chains vulnerable to sliding-type wear as they pass about a cutter bar or other supporting means. The inserts are of circular cross section and are affixed in holes in the link surfaces with their exposed end or ends flush with the surfaces they protect. Similar inserts may be provided for those supporting means surfaces with which the chain links are in sliding contact.
Inventors
- 👤 C Krekeler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:33
CPC Classifications
E; E21; E21C; E21C25/00; E21C25/22; E21C25/28; E21C25/34; B; B27; B27B; B27B33/00; B27B33/14; B27B33/142
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
91 words
In the combination of a chain for a mining machine or the like and a supporting means for said chain with which said chain has sliding contact, wherein said chain is made up of a plurality of links and wherein at least some of said chain links and said supporting means have surfaces subject to sliding-type wear therebetween, means for protecting at least selected ones of said surfaces, said means comprising discrete hard wear-resistant insert elements of circular cross section embedded axially in preformed holes in said surfaces to be protected.
Claim 2
Dependent Claim
91 words
In the combination of a chain for a mining machine or the like and a supporting means for said chain with which said chain has sliding contact, wherein said chain is made up of a plurality of links and wherein at least some of said chain links and said supporting means have surfaces subject to sliding-type wear therebetween, means for protecting at least selected ones of said surfaces, said means comprising discrete hard wear-resistant insert elements of circular cross section embedded axially in preformed holes in said surfaces to be protected.
Claim 3
Dependent Claim
29 words
The structure claimed in claim 1 wherein each of said inserts is held in its respective hole by means of a forced-fit between said insert and its respective hole.
Claim 4
Dependent Claim
20 words
The structure claimed in claim 1 wherein each of said inserts is held in its respective hole by adhesive means.
Claim 5
Dependent Claim
19 words
The structure claimed in claim 1 wherein each of said inserts is held in its respective hole by brazing.
Claim 6
Dependent Claim
46 words
The structure claimed in claim 1 wherein said inserts are frusto-conical each having a large diameter end and a small diameter end, said large diameter end comprising the portion of said insert protecting said surface to be protected, said holes for said inserts also being frusto-conical.
Claim 7
Dependent Claim
53 words
The structure claimed in claim 1 wherein each of said inserts is cylindrical and has one end of enlarged diameter so as to have a T-shaped longitudinal cross section, each of said holes for said inserts being correspondingly shaped, said end of said insert of enlarged diameter protecting said surface to be protected.
Claim 8
Dependent Claim
15 words
The structure claimed in claim 1 wherein said inserts are removably mounted in said holes.
Claim 9
Dependent Claim
18 words
The structure claimed in claim 1 wherein said holes are of circular cross section, said inserts being cylindrical.
Claim 10
Dependent Claim
20 words
The structure claimed in claim 8 wherein the axis of each of said cylindrical inserts is shorter than its diameter.
Claim 11
Dependent Claim
21 words
The structure claimed in claim 1 wherein each of said inserts has a surface substantially flush with said surface it protects.
Claim 12
Dependent Claim
84 words
The structure claimed in claim 10 wherein said surfaces to be protected comprise first and second integral surfaces oriented at an exterior angle of 270* to each other, said holes extending inwardly from said first surface and partially intersecting said second surface, the axes of said holes being perpendicular to said first surface and parallel to said second surface, said inserts each having an exposed end substantially flush with said first surface and a longitudinal peripheral exposed portion substantially flush with said second surface.
Claim 13
Dependent Claim
71 words
The structure claimed in claim 1 wherein said supporting means comprises a cutter bar having grooves at least along its longitudinal edges, said grooves each having side and bottom surfaces and being of inverted T-shaped cross section, said chain being of the type wherein some at least of said links comprise a body and leg means projecting from said body, said leg means engageable and slidable within said cutter bar grooves.
Claim 14
Dependent Claim
18 words
The structure claimed in claim 12 wherein said surfaces to be protected comprise surfaces of said leg means.
Claim 15
Dependent Claim
25 words
The structure claimed in claim 2 wherein said surfaces to be protected comprise some at least of said side and bottom surfaces of said groove.
Claim 16
Dependent Claim
45 words
The structure claimed in claim 12 including wear strips affixed to said side and bottom surfaces of said grooves, said wear strips having surfaces subject to said sliding type wear, selected ones at least of said last mentioned surfaces comprising said surfaces to be protected.
Claim 17
Dependent Claim
72 words
The structure claimed in claim 1 wherein said supporting means comprises a cutter bar having longitudinal edge surface portions, said chain being of the type wherein some at least of said links each comprises a body having a pair of leg means projecting from said body and in parallel spaced relationship, said pair of leg means being configured to straddle and slidably engage said longitudinal edge surface portions of said cutter bar.
Claim 18
Dependent Claim
20 words
The structure claimed in claim 16 wherein said surfaces to be protected comprise surfaces of said pair of leg means.
Claim 19
Dependent Claim
26 words
The structure claimed in claim 16 wherein said surfaces to be protected comprise some at least of said longitudinal edge surface portions of said cutter bar.
Claim 20
Dependent Claim
45 words
The structure claimed in claim 16 including wear strips affixed to said longitudinal edge surface portions of said cutter bar, said wear strips having surfaces subject to sliding type wear, selected ones at least of said last mentioned surfaces comprising said surfaces to be protected.
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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) | 1977-12-23 | 1978-06-24 | 1978-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-23 | 1982-06-24 | 1982-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-23 | 1986-06-24 | 1986-12-24 | $7700.00 | Window Closed / Lapsed |