US3868145A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Eccentric ring impacting mechanism for in-situ rock breakers
Assignee: Caterpillar Inc
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Filing: 1973-08-23
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Granted: 1975-02-25
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Expires: 1993-08-23
Abstract
Abstract There is disclosed a mechanically driven impact rock fracturing mechanism having a rotary eccentric shaft drive. An impact member in the form of a ring is rotatably mounted on the eccentric shaft and driven in an orbital path to intermittently engage a fracturing shank. Means are provided including a reaction ring to constrain the ring impact member to rotate with respect to the eccentric shaft.
Inventors
- 👤 Delwin Earl Cobb
- 👤 Jerry Dale Fidler
- 👤 Nathan Gutman
- 👤 Richard Edward Livesay
- 👤 Orrin Arthur Stemler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:08
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/96; E02F3/966; B; B25; B25D; B25D11/00; B25D11/06; B25D11/066; B25D11/068; E02F5/00; E02F5/30; E21; E21C; E21C27/00; E21C27/20; E21C27/28; Y; Y10; Y10S; Y10S370/00; Y10S370/901; Y10S370/902; Y10S370/903; Y10S370/904
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
126 words
An impact mechanism for delivering intermittent impact blows to a rock fracturing shank comprising: a housing; a drive shaft having an eccentric journal rotatably mounted in said housing; a fracturing shank reciprocably mounted adjacent said housing and having an impact receiving member extending into said housing and a fracturing tip extending away from the impact receiving member; an annular impact member having a plurality of impact faces rotatably mounted in said housing on said eccentric journal and driven by said shaft in orbital path for intermittent engagement of said impact faces with said impact receiving member; and, means for constraining said impact member to rotate about its axis in a direction opposite the direction of rotation of said driven shaft when driven in said orbital path.
Claim 2
Dependent Claim
126 words
An impact mechanism for delivering intermittent impact blows to a rock fracturing shank comprising: a housing; a drive shaft having an eccentric journal rotatably mounted in said housing; a fracturing shank reciprocably mounted adjacent said housing and having an impact receiving member extending into said housing and a fracturing tip extending away from the impact receiving member; an annular impact member having a plurality of impact faces rotatably mounted in said housing on said eccentric journal and driven by said shaft in orbital path for intermittent engagement of said impact faces with said impact receiving member; and, means for constraining said impact member to rotate about its axis in a direction opposite the direction of rotation of said driven shaft when driven in said orbital path.
Claim 3
Dependent Claim
144 words
An impact mechanism for delivering intermittent impact blows to a rock fracturing shank comprising: a housing; a drive shaft having an eccentric journal rotatably mounted in said housing; a fracturing shank reciprocably mounted adjacent said housing and having an impact receiving member extending into said housing and a fracturing tip extending away from the impact receiving member; and, an annular impact member having an outer cylindrical surface defining a plurality of impact faces mounted in said housing and rotatably driven by said eccentric journal of said shaft in orbital path for intermittent engagement of said impact faces with said impact receiving member; constraining means comprising a stationary reaction ring mounted in said housing concentric to said orbital path for constraining said impact member to rotate when driven in said orbital path; and, drive means carried by said impact member for engaging said reaction ring.
Claim 4
Dependent Claim
144 words
An impact mechanism for delivering intermittent impact blows to a rock fracturing shank comprising: a housing; a drive shaft having an eccentric journal rotatably mounted in said housing; a fracturing shank reciprocably mounted adjacent said housing and having an impact receiving member extending into said housing and a fracturing tip extending away from the impact receiving member; and, an annular impact member having an outer cylindrical surface defining a plurality of impact faces mounted in said housing and rotatably driven by said eccentric journal of said shaft in orbital path for intermittent engagement of said impact faces with said impact receiving member; constraining means comprising a stationary reaction ring mounted in said housing concentric to said orbital path for constraining said impact member to rotate when driven in said orbital path; and, drive means carried by said impact member for engaging said reaction ring.
Claim 5
Dependent Claim
27 words
The impact mechanism of claim 2 wherein said reaction ring is a ring gear; and, said drive means is a pinion gear secured to said impact member.
Claim 6
Dependent Claim
31 words
The impact mechanism of claim 3 wherein at least one of said ring gear and said pinion gear is secured to one of said housing and impact member by resilient means.
Claim 7
Dependent Claim
24 words
The impact mechanism of claim 3 wherein the pitch diameter of said pinion gear is different from the outer diameter of said impact member.
Claim 8
Dependent Claim
16 words
The impact mechanism of claim 5 wherein said pitch diameter is greater than said outer diameter.
Claim 9
Dependent Claim
16 words
The impact mechanism of claim 5 wherein said pitch diameter is less than said outer diameter.
Claim 10
Dependent Claim
36 words
The impact mechanism of claim 2 wherein said reaction ring includes a friction drive surface; and, said drive means is an annular friction surface carried by said impact member for frictionally engaging said friction drive surface.
Claim 11
Dependent Claim
24 words
The impact mechanism of claim 8 wherein the pitch diameter of said annular drive member is greater than the diameter of said impact member.
Claim 12
Dependent Claim
24 words
The impact mechanism of claim 8 wherein the pitch diameter of said annular drive member is less than the diameter of said impact member.
Claim 13
Dependent Claim
14 words
The impact mechanism of claim 8 wherein said friction surfaces define a frusto-conical configuration.
Claim 14
Dependent Claim
138 words
An impact mechanism for delivering intermittent impact blows to a rock fracturing shank comprising: a housing; a drive shaft having an eccentric journal rotatably mounted in said housing; a fracturing shank reciprocably mounted adjacent said housing and having an impact receiving member extending into said housing and a fracturing tip extending away from the impact receiving member; an annular impact member having an outer cylindrical surface defining a plurality of impact faces mounted in said housing and rotatably driven by said eccentric journal of said shaft in an orbital path for intermittent engagement of said impact faces with said impact receiving member; and means for rotating said impact member counter to the rotation of said drive shaft so that a point on said impact face defines a loop during movement toward and away from said impact receiving member.
Claim 15
Dependent Claim
138 words
An impact mechanism for delivering intermittent impact blows to a rock fracturing shank comprising: a housing; a drive shaft having an eccentric journal rotatably mounted in said housing; a fracturing shank reciprocably mounted adjacent said housing and having an impact receiving member extending into said housing and a fracturing tip extending away from the impact receiving member; an annular impact member having an outer cylindrical surface defining a plurality of impact faces mounted in said housing and rotatably driven by said eccentric journal of said shaft in an orbital path for intermittent engagement of said impact faces with said impact receiving member; and means for rotating said impact member counter to the rotation of said drive shaft so that a point on said impact face defines a loop during movement toward and away from said impact receiving member.
Claim 16
Dependent Claim
181 words
An impact mechanism for delivering intermittent impact blows to a rock fracturing shank comprising: a housing; a drive shaft having an eccentric journal rotatably mounted in said housing; a fracturing shank reciprocably mounted adjacent said housing and having an impact receiving member extending into said housing and a fracturing tip extending away from the impact receiving member; an annular impact member having an outer cylindrical surface defining a plurality of impact faces mounted in said housing and rotatably driven by said eccentric journal of said shaft in an orbital path for intermittent engagement of said impact faces with said impact receiving member; and means for rotating said impact member comprising a reaction ring disposed adjacent said path, and an annular drive member carried by said impact member for engaging said reaction ring for constraining said impact member to rotate when driven in said orbital path so that a point on said impact face defines a loop during movement toward and away from said impact receiving member, said annular drive member having a diameter greater than the diameter of said impact face.
Claim 17
Dependent Claim
181 words
An impact mechanism for delivering intermittent impact blows to a rock fracturing shank comprising: a housing; a drive shaft having an eccentric journal rotatably mounted in said housing; a fracturing shank reciprocably mounted adjacent said housing and having an impact receiving member extending into said housing and a fracturing tip extending away from the impact receiving member; an annular impact member having an outer cylindrical surface defining a plurality of impact faces mounted in said housing and rotatably driven by said eccentric journal of said shaft in an orbital path for intermittent engagement of said impact faces with said impact receiving member; and means for rotating said impact member comprising a reaction ring disposed adjacent said path, and an annular drive member carried by said impact member for engaging said reaction ring for constraining said impact member to rotate when driven in said orbital path so that a point on said impact face defines a loop during movement toward and away from said impact receiving member, said annular drive member having a diameter greater than the diameter of said impact face.
Claim 18
Dependent Claim
22 words
The impact mechanism of claim 13 wherein said reaction ring is a ring gear; and, said drive member is a pinion gear.
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) | 1978-02-24 | 1978-08-26 | 1979-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-24 | 1982-08-26 | 1983-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-24 | 1986-08-26 | 1987-02-25 | $7700.00 | Window Closed / Lapsed |