US3697137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resilient mounting for cutting tools of mining machines and the like
Assignee: Cincinnati Mine Machinery Co
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Filing: 1969-12-15
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Granted: 1972-10-10
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Expires: 1989-12-15
Abstract
Abstract In the combination of a cutting tool for a mining machine or the like, a tool mounting lug and means for mounting the lug, a resilient means in association with the lug permitting limited movement of the cutting tool in at least a direction substantially opposite the cutting direction so as to ease the load on the cutting tool and permit the cutting tool to build up a fracturing pressure against the material being cut.
Inventors
- 👤 Claude B Krekeler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:11
CPC Classifications
E; E21; E21C; E21C35/00; E21C35/18; E21C35/19; E21C35/197
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
319 words
The combination of a cutting tool, a lug for supporting said cutting tool and a mounting means for said lug, said cutting tool comprising an elongated shank terminating at one end in a cutting tip and at the other end in an abutment surface, said lug comprising a body portion having a shank receiving perforation to receive the shank of said cutting tool, said shank receiving perforation having a forward end and a rearward end, said shank of said cutting tool being shiftable axially within said shank receiving perforation, a lug abutment surface in association with said rearward end of said shank receiving perforation, said lug abutment surface lying in a plane non-parallel with the axis of said perforation and cooperating with said abutment surface on said cutting tool shank, retaining means preventing the loss of said shank from said perforation, said lug being supported by said mounting means, said mounting means being capable of moving said cutting tool and lug in a cutting direction against material to be cut, and at least one block of rEsilient material in contact with said lug and in association with said lug abutment surface, at least a portion of said block of resilient material being unconfined and unenclosed to permit lateral distortion thereof, said block of resilient material having a transverse cross sectional area at least substantially equal to the transverse cross sectional area of said cutting tool, said block of resilient material being so positioned as to permit limited movement of said cutting tool in at least a direction substantially opposite to said cutting direction, said block of resilient material being of sufficient size and compressability that the load on said cutting tip is eased and a fracturing pressure is built up against material being cut when said block of resilient material is distorted, which fracturing pressure is released when said material gives way, imparting a kick to said cutting tool.
Claim 2
Dependent Claim
319 words
The combination of a cutting tool, a lug for supporting said cutting tool and a mounting means for said lug, said cutting tool comprising an elongated shank terminating at one end in a cutting tip and at the other end in an abutment surface, said lug comprising a body portion having a shank receiving perforation to receive the shank of said cutting tool, said shank receiving perforation having a forward end and a rearward end, said shank of said cutting tool being shiftable axially within said shank receiving perforation, a lug abutment surface in association with said rearward end of said shank receiving perforation, said lug abutment surface lying in a plane non-parallel with the axis of said perforation and cooperating with said abutment surface on said cutting tool shank, retaining means preventing the loss of said shank from said perforation, said lug being supported by said mounting means, said mounting means being capable of moving said cutting tool and lug in a cutting direction against material to be cut, and at least one block of rEsilient material in contact with said lug and in association with said lug abutment surface, at least a portion of said block of resilient material being unconfined and unenclosed to permit lateral distortion thereof, said block of resilient material having a transverse cross sectional area at least substantially equal to the transverse cross sectional area of said cutting tool, said block of resilient material being so positioned as to permit limited movement of said cutting tool in at least a direction substantially opposite to said cutting direction, said block of resilient material being of sufficient size and compressability that the load on said cutting tip is eased and a fracturing pressure is built up against material being cut when said block of resilient material is distorted, which fracturing pressure is released when said material gives way, imparting a kick to said cutting tool.
Claim 3
Dependent Claim
146 words
The structure claimed in claim 1 wherein said lug comprises a first element and a second element, said first lug element having said shank receiving perforation, a forward end facing in said cutting direction, a rearward end and a bottom surface extending therebetwen, said second lug element having an upper surface corresponding to said bottom surface of said first lug element, said forward end of said first lug element being pivotally affixed to said second lug element with said bottom surface of said first lug element in spaced relationship to said upper surface of said lug element, a second block of resilient material located between said bottom and upper surfaces and affixed to at least one of said surfaces, a third block of resilient material supported by said mounting means, said second lug element having a bottom portion embedded in said third block of resilient material.
Claim 4
Dependent Claim
28 words
The structure claimed in claim 1 including stop means limiting the compression of said first block of resilient material to prevent the resilient strength thereof from being exceeded.
Claim 5
Dependent Claim
37 words
The structure claimed in claim 1 wherein said shank receiving perforation has a circular cross section, said cutting tool having a circular cross section of such diameter as to be freely rotatable within said shank receiving perforation.
Claim 6
Dependent Claim
31 words
The structure claimed in claim 4 including stop means in association with said lug abutment surface to prevent the resilient strength of said first block of resilient material from being exceeded.
Claim 7
Dependent Claim
103 words
The structure claimed in claim 4 wherein said lug comprises a body portion having a forward surface and a rearward surface, said shank receiving perforation extending through said body portion and forming openings in said forward and rearward surfaces, said lug having a rearwardly extending portion terminating in an anvil portion, said first block of resilient material being affixed to said anvil portion, an abutment means affixed to said first block of resilient material, said abutment means having said lug abutment surface thereon, said lug abutment surface facing said opening in said rearward surface of said lug body portion and being spaced therefrom.
Claim 8
Dependent Claim
79 words
The structure claimed in claim 6 wherein said lug has a bottom surface and said mounting means has a corresponding surface, the forward end of said lug being pivotally affixed to said mounting means with said bottom surface of said lug in spaced relationship to said corresponding mounting means surface, a second block of resilient material located between said lug bottom surface and said mounting means surface and being affixed to at least one of said last mentioned surfaces.
Claim 9
Dependent Claim
33 words
The structure claimed in claim 6 including a second block of resilient material supported by said mounting means, said lug having a bottom portion embedded in said last mentioned block of resilient material.
Claim 10
Dependent Claim
27 words
The structure claimed in claim 6 including at least one rearwardly extending element on said abutment means comprising a stop to protect said block of resilient material.
Claim 11
Dependent Claim
95 words
The structure claimed in claim 4 wherein said lug comPrises a body portion having a forward surface and a rearward surface, said shank receiving perforation extending through said body portion and forming openings in said forward and rearward surfaces, said lug having a rearwardly extending portion terminating in an anvil portion, said first block of resilient material being affixed to said anvil portion, said first block of resilient material having said lug abutment surface thereon, said lug abutment surface facing said opening in said rearward surface of said lug body portion and being spaced therefrom.
Claim 12
Dependent Claim
79 words
The structure claimed in claim 10 wherein said lug has a bottom surface and said mounting means has a corresponding surface, the forward end of said lug being pivotally affixed to said mounting means with said bottom surface of said lug in spaced relationship to said corresponding mounting means surface, a second block of resilient material located between said lug bottom surface and said mounting means surface and being affixed to at least one of said last mentioned surfaces.
Claim 13
Dependent Claim
32 words
The structure of claim 10 including a second block of resilient material supported by said mounting means, said lug having a bottom portion embedded in said last mentioned block of resilient material.
Claim 14
Dependent Claim
30 words
The structure claimed in claim 10 wherein said block of resilient material has a perforation therein coaxial with said shank receiving perforation and a stop pin located within said perforation.
Claim 15
Dependent Claim
311 words
In a lug for a cutting tool of a mining machine and the like, the cutting tool being of the type having an elongated shank of circular cross section with a hard cutting tip at one end and an abutment surface at the other, said lug being of the type comprising a body portion having a forward surface and a rearward surface, said body portion having a shank receiving perforation extending therethrough and forming openings in said forward and rearward surfaces, said shank receiving perforation having a circular cross section of a diameter such as to permit free rotation of said cutting tool shank therein, said lug having a portion extending rearwardly of said body and terminating in an anvil, said anvil supporting a lug abutment means having a lug abutment surface adapted to cooperate with said shank abutment surface, said lug abutment surface facing said opening in said rearward surface of said lug body portion and being spaced therefrom, a first block of resilient material in contact with said anvil and in association with said lug abutment means, at least a portion of said first block of resilient material being unconfined and unenclosed to permit the lateral distortion thereof, said first block of resilient material having a transverse cross sectional area at least substantially equal to the transverse cross sectional area of said shank receiving perforation whereby, when said cutting tool is mounted in said shank receiving perforation, said first block of resilient material permits limited movement of said cutting tool in at least a direction substantially opposite to the cutting direction to ease the load on said cutting tip and to build up a fracturing pressure against the material being cut when said first block of resilient material is compressed, which fracturing pressure is released when said material being cut gives way, imparting a kick to said cutting tool.
Claim 16
Dependent Claim
311 words
In a lug for a cutting tool of a mining machine and the like, the cutting tool being of the type having an elongated shank of circular cross section with a hard cutting tip at one end and an abutment surface at the other, said lug being of the type comprising a body portion having a forward surface and a rearward surface, said body portion having a shank receiving perforation extending therethrough and forming openings in said forward and rearward surfaces, said shank receiving perforation having a circular cross section of a diameter such as to permit free rotation of said cutting tool shank therein, said lug having a portion extending rearwardly of said body and terminating in an anvil, said anvil supporting a lug abutment means having a lug abutment surface adapted to cooperate with said shank abutment surface, said lug abutment surface facing said opening in said rearward surface of said lug body portion and being spaced therefrom, a first block of resilient material in contact with said anvil and in association with said lug abutment means, at least a portion of said first block of resilient material being unconfined and unenclosed to permit the lateral distortion thereof, said first block of resilient material having a transverse cross sectional area at least substantially equal to the transverse cross sectional area of said shank receiving perforation whereby, when said cutting tool is mounted in said shank receiving perforation, said first block of resilient material permits limited movement of said cutting tool in at least a direction substantially opposite to the cutting direction to ease the load on said cutting tip and to build up a fracturing pressure against the material being cut when said first block of resilient material is compressed, which fracturing pressure is released when said material being cut gives way, imparting a kick to said cutting tool.
Claim 17
Dependent Claim
94 words
The structure claimed in claim 14 including a mounting means for said lug capable of moving said lug in a cutting direction, said lug having a bottom surface and said mounting means having a corresponding surface, the forward end of said lug being pivotally affixed to said mounting means with said bottom surface of said lug in spaced relationship to said corresponding mounting means surface, a second block of resilient material located between said lug bottom surface and said mounting means surface and being affixed to at least one of said last mentioned surfaces.
Claim 18
Dependent Claim
28 words
The structure claimed in claim 14 including stop means limiting the compression of said first bloCk of resilient material to prevent the resilient strength thereof from being exceeded.
Claim 19
Dependent Claim
31 words
The structure claimed in claim 14 wherein said first block of resilient material is affixed to said anvil, said lug abutment means being affixed to said first block of resilient material.
Claim 20
Dependent Claim
48 words
The structure claimed in claim 17 including a mounting means for said lug capable of moving said lug in a cutting direction, a second block of resilient material supported by said mounting means, said lug having a bottom portion embedded in said last mentioned block of resilient material.
Claim 21
Dependent Claim
28 words
The structure claimed in claim 17 including at least one rearwardly extending element on said abutment means comprising a stop to protect said first block of resilient material.
Claim 22
Dependent Claim
60 words
The structure claimed in claim 17 wherein said first block of resilient material has a perforation therein, said abutment means comprising a headed pin, said pin located within said perforation in said first block of resilient material and comprising a stop to protect said first block of resilient material, said head of said pin having said lug abutment surface thereon.
Claim 23
Dependent Claim
29 words
The structure claimed in claim 14 wherein said first block of resilient material is affixed to said anvil and comprises said lug abutment means with said lug abutment surface.
Claim 24
Dependent Claim
94 words
The structure claimed in claim 21 including a mounting means for said lug capable of moving said lug in a cutting direction, said lug having a bottom surface and said mounting means having a corresponding surface, the forward end of said lug being pivotally affixed to said mounting means with said bottom surface of said lug in spaced relationship to said corresponding mounting means surface, a second block of resilient material located between said lug bottom surface and said mounting means surface and being affixed to at least one of said last mentioned surfaces.
Claim 25
Dependent Claim
48 words
The structure claimed in claim 21 including a mounting means for said lug capable of moving said lug in a cutting direction, a second block of resilient material supported by said mounting means, said lug having a bottom portion embedded in said last mentioned block of resilient material.
Claim 26
Dependent Claim
38 words
The structure claimed in claim 21 wherein said first block of resilient material has a perforation therein, a pin located within said last mentioned perforation and acting as a stop to limit the compression of said resilient material.
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) | 1975-10-10 | 1976-04-10 | 1976-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-10 | 1980-04-10 | 1980-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-10 | 1984-04-10 | 1984-10-10 | $7700.00 | Window Closed / Lapsed |