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US3797584A
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Striking bar
Assignee: Sullivan Machinery Co
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Filing: 1972-03-31
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Granted: 1974-03-19
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Expires: 1992-03-31
Abstract
Abstract A striking bar of a type utilized in a percussive tool such as a hammer rock drill, and more particularly a striking bar assembly having improved passageway means therein for providing lubricating fluid intermediate the striking bar and the encompassing supporting bushings.
Inventors
- 👤 J Ordway
- 👤 E Bailey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:00
CPC Classifications
E; E21; E21B; E21B17/00; B; B25; B25D; B25D17/00; B25D17/26; E21B6/00; Y; Y10; Y10S; Y10S173/00; Y10S173/03; Y10T; Y10T279/00; Y10T279/17; Y10T279/17042; Y10T279/17068; Y10T279/17111
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
151 words
A striking bar assembly comprising: a striking bar member including forward and rear bearing portions with a chuck driver portion disposed therebetween; forward and rear bushing members having contact areas which rotatably support said striking bar adjacent said forward and rear bearing portions, respectively; a chuck driver member in driving engagement with said chuck driver portion and disposed intermediate said bushing members; passageway means extending continuously along the axial extent of and adjacent the outer periphery of at least a portion of said striking bar; at least one of said bearing portions includes at least one axially elongated radially inwardly extending groove and a portion of said passageway means is defined by said groove and the inner periphery of the respective bushing member adjacent thereto; and said passageway means having a cross section to provide a flow of a fluid therethrough at a rate to cool and lubricate said contact areas.
Claim 2
Dependent Claim
151 words
A striking bar assembly comprising: a striking bar member including forward and rear bearing portions with a chuck driver portion disposed therebetween; forward and rear bushing members having contact areas which rotatably support said striking bar adjacent said forward and rear bearing portions, respectively; a chuck driver member in driving engagement with said chuck driver portion and disposed intermediate said bushing members; passageway means extending continuously along the axial extent of and adjacent the outer periphery of at least a portion of said striking bar; at least one of said bearing portions includes at least one axially elongated radially inwardly extending groove and a portion of said passageway means is defined by said groove and the inner periphery of the respective bushing member adjacent thereto; and said passageway means having a cross section to provide a flow of a fluid therethrough at a rate to cool and lubricate said contact areas.
Claim 3
Dependent Claim
24 words
A striking bar assembly as specified in claim 1 including a plurality of said grooves circumferentially spaced about said one of said bearing portions.
Claim 4
Dependent Claim
47 words
A striking bar assembly as specified in claim 1 wherein said passageway means extend continuously along the axial extent of and adjacent the outer periphery of said striking bar from the forward end of said forward bushing member to the rearward end of said rear bushing member.
Claim 5
Dependent Claim
34 words
A striking bar assembly as specified in claim 1 wherein said passageway means are defined intermediate the outer periphery of said portions and the inner periphery of said bushing members and said driver member.
Claim 6
Dependent Claim
27 words
A striking bar assembly as specified in claim 1 wherein said driving engagement is between cooperating splines respectively carried by said driver portion and said driver member.
Claim 7
Dependent Claim
46 words
A striking bar assembly as specified in claim 5 wherein the minor diameter of the driver portion splines are undercut to define a portion of said passageway means intermediate the minor diameter of said driver portion splines and the minor diameter of the driver member splines.
Claim 8
Dependent Claim
151 words
A striking bar assembly comprising: a striking bar member including forward and rear bearing portions with a chuck driver portion disposed therebetween: forward and rear bushing members having contact areas which rotatably support said striking bar adjacent said forward and rear bearing portions, respectively; a chuck driVer member in driving engagement with said chuck driver portion and disposed intermediate said bushing members; passageway means extending continuously along the axial extent of and adjacent the outer periphery of at least a portion of said striking bar; at least one of said bushing members includes at least one axially elongated radially outwardly extending groove and a portion of said passageway means is defined by said groove and the outer periphery of the respective bearing portion adjacent thereto and said passageway means having a cross section to provide a flow of a fluid therethrough at a rate to cool and lubricate said contact areas.
Claim 9
Dependent Claim
151 words
A striking bar assembly comprising: a striking bar member including forward and rear bearing portions with a chuck driver portion disposed therebetween: forward and rear bushing members having contact areas which rotatably support said striking bar adjacent said forward and rear bearing portions, respectively; a chuck driVer member in driving engagement with said chuck driver portion and disposed intermediate said bushing members; passageway means extending continuously along the axial extent of and adjacent the outer periphery of at least a portion of said striking bar; at least one of said bushing members includes at least one axially elongated radially outwardly extending groove and a portion of said passageway means is defined by said groove and the outer periphery of the respective bearing portion adjacent thereto and said passageway means having a cross section to provide a flow of a fluid therethrough at a rate to cool and lubricate said contact areas.
Claim 10
Dependent Claim
23 words
A striking bar as specified in claim 7 including a plurality of said grooves circumferentially spaced about said one of said bushing members.
Claim 11
Dependent Claim
47 words
A striking bar assembly as specified in claim 7 wherein said passageway means extend continuously along the axial extent of and adjacent the outer periphery of said striking bar from the forward end of said forward bushing member to the rearward end of said rear bushing member.
Claim 12
Dependent Claim
34 words
A striking bar assembly as specified in claim 7 wherein said passageway means are defined intermediate the outer periphery of said portions and the inner periphery of said bushing members and said driver member.
Claim 13
Dependent Claim
27 words
A striking bar assembly as specified in claim 7 wherein said driving engagement is between cooperating splines respectively carried by said driver portion and said driver member.
Claim 14
Dependent Claim
46 words
A striking bar assembly as specified in claim 11 wherein the minor diameter of the driver portion splines are undercut to define a portion of said passageway means intermediate the minor diameter of said driver portion splines and the minor diameter of the driver member splines.
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) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |