Patent US3600832A successfully refreshed from Google Patents.
US3600832A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pivoted cutter and control for hydraulic dredge
Assignee: Individual
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Filing: 1970-01-20
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Granted: 1971-08-24
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Expires: 1990-01-20
Abstract
Abstract On the outboard end of a hydraulic dredge ladder there is an axially extending stub shaft mounted in spaced-apart bearings. Attached to the outer end of the ladder is a circular bearing member that extends transversely to and coaxial about the stub shaft. A cutter member formed of heavy sheet metal material in a circular arc a little greater than a semicircle is welded at its ends to a circular channel iron ring that is received over the circular bearing member for pivotal movement thereon. The inner midportion of the semicircularlike cutter head has a bearing member affixed thereto that is received over the protruding end of the stub shaft. A triangularlike bracket is received over the stub shaft towards its rear end and is welded thereto. the base of the triangularlike bracket is up and above the stub shaft and has a pivotal mounting at each end that carries a sheave. Below each end of the bracket there is a cutaway portion that forms stop portions which strike against stops on the side I-beams of the boom positioned therebelow to limit the tilt of the shaft and the cutter. The usual hauling wire ropes lead from a hauling drum through their respective sheaves to respective anchor position out beyond the side of the boom. By slackening on one rope and hauling on the other with the cutter in the earth, its edges cut into the earth and it tilts so as to loosen the earth that is then sucked up by the mouth of the suction tube.
Inventors
- 👤 Thomas J Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:11
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/88; E02F3/90; E02F3/92; E02F3/9212; E02F3/9225; E02F3/9231
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
301 words
A hydraulic dredge cutter head and control comprising, in combination, a dredge ladder having generally longitudinally axially extending side portions and a suction tube having a suction opening adjacent the outer end of the ladder, a circular bearing member extending transversely to the longitudinal axis of the ladder and attached to its outer end with the suction tube suction end opening adjacently thereto, a stub shaft extending axially on and mounted on the ladder and extending through and outward of the circular bearing member, a cutterhead having a semicircularlike cutter shaped as a part of a cylinder whose longitudinal axis extends generally transverse to the longitudinal axis of the stub shaft and a ring-shaped bearing member secured to the ends of said semicircularlike cutter, said ring-shaped bearing member being received on said circular bearing member on the end of said ladder, said semicircularlike cutter having a bearing member attached on its inner middle surface and receiving the outer end of the stub shaft, a control bracket member extending transversely to and attached to said stub shaft at a position spaced in from said cutterhead, said bracket member having portions extending adjacent to and for abutment against said side portions of the ladder to limit the pivotal movement from side to side of said bracket and its attached stub shaft and cutterhead, sheave means pivotally attached to each end of said transversely extending control bracket member, each sheave means being adapted to receive therethrough a hauling rope for the dredge ladder, whereby a pull on a hauling rope pulls the ladder to one side and pivots and holds said cutterhead pivoted downwardly in the same direction of pull on said hauling rope, said pivotal movement of the cutter head being limited by said control bracket striking said side portion of the ladder.
Claim 2
Dependent Claim
301 words
A hydraulic dredge cutter head and control comprising, in combination, a dredge ladder having generally longitudinally axially extending side portions and a suction tube having a suction opening adjacent the outer end of the ladder, a circular bearing member extending transversely to the longitudinal axis of the ladder and attached to its outer end with the suction tube suction end opening adjacently thereto, a stub shaft extending axially on and mounted on the ladder and extending through and outward of the circular bearing member, a cutterhead having a semicircularlike cutter shaped as a part of a cylinder whose longitudinal axis extends generally transverse to the longitudinal axis of the stub shaft and a ring-shaped bearing member secured to the ends of said semicircularlike cutter, said ring-shaped bearing member being received on said circular bearing member on the end of said ladder, said semicircularlike cutter having a bearing member attached on its inner middle surface and receiving the outer end of the stub shaft, a control bracket member extending transversely to and attached to said stub shaft at a position spaced in from said cutterhead, said bracket member having portions extending adjacent to and for abutment against said side portions of the ladder to limit the pivotal movement from side to side of said bracket and its attached stub shaft and cutterhead, sheave means pivotally attached to each end of said transversely extending control bracket member, each sheave means being adapted to receive therethrough a hauling rope for the dredge ladder, whereby a pull on a hauling rope pulls the ladder to one side and pivots and holds said cutterhead pivoted downwardly in the same direction of pull on said hauling rope, said pivotal movement of the cutter head being limited by said control bracket striking said side portion of the ladder.
Claim 3
Dependent Claim
40 words
Apparatus according to claim 1, wherein said control bracket member has said portions extending for abutment against said side portions of the ladder extending above said portions for pivotal movement downward into its abutment therewith to limit its pivotal movement.
Claim 4
Dependent Claim
60 words
Apparatus according to claim 1, wherein said dredge ladder has an axially extending bearing mounted at its outer end at the center of said circular bearing member for pivotally mounting an outer end portion of the stub shaft and including means adjacent said bearing and in engagement with the stub shaft for limiting the axial movement of said stub shaft.
Claim 5
Dependent Claim
22 words
Apparatus according to claim 1 wherein said suction tube suction end is positioned within the lower half of said circular bearing member.
Claim 6
Dependent Claim
283 words
In a hydraulic dredge ladder having generally longitudinally extending side portions and a suction tube having a suction opening adjacent the outer end of the ladder, an improved cutterhead and control comprising, a circular bearing member extending transversely to the axis of the ladder and adapted for attachment to its outer end adjacent the suction tube opening, a stub shaft extending axially and having mounting means for mounting it on the ladder so as to extend through and outward of the circular bearing member, a cutterhead having a semicircularlike cutter shaped as a part of a cylinder whose longitudinal axis extends generally transverse to the longitudinal axis of the stub shaft and a ring-shaped bearing member secured to the ends of said semicircularlike cutter, said ring-shaped cutter having a bearing member attached on its inner middle surface and receiving the outward end of the stub shaft, a control bracket member extending transversely to and attached to said stub shaft at a position spaced in from said cutterhead, said bracket member having portions extending adjacent to and for abutment against said side portions of the ladder to limit the pivotal movement from side to side of said bracket and its attached stub shaft and cutterhead, sheave means pivotally attached to each end of said transversely extending control bracket member, each sheave means being adapted to receive therethrough a hauling rope for the dredge ladder, whereby a pull on a hauling rope pulls the ladder to one side and pivots and holds said cutterhead pivoted downwardly in the same direction of pull on said hauling rope, said pivotal movement of the cutterhead being limited by said control bracket striking said side portion of the ladder.
Claim 7
Dependent Claim
283 words
In a hydraulic dredge ladder having generally longitudinally extending side portions and a suction tube having a suction opening adjacent the outer end of the ladder, an improved cutterhead and control comprising, a circular bearing member extending transversely to the axis of the ladder and adapted for attachment to its outer end adjacent the suction tube opening, a stub shaft extending axially and having mounting means for mounting it on the ladder so as to extend through and outward of the circular bearing member, a cutterhead having a semicircularlike cutter shaped as a part of a cylinder whose longitudinal axis extends generally transverse to the longitudinal axis of the stub shaft and a ring-shaped bearing member secured to the ends of said semicircularlike cutter, said ring-shaped cutter having a bearing member attached on its inner middle surface and receiving the outward end of the stub shaft, a control bracket member extending transversely to and attached to said stub shaft at a position spaced in from said cutterhead, said bracket member having portions extending adjacent to and for abutment against said side portions of the ladder to limit the pivotal movement from side to side of said bracket and its attached stub shaft and cutterhead, sheave means pivotally attached to each end of said transversely extending control bracket member, each sheave means being adapted to receive therethrough a hauling rope for the dredge ladder, whereby a pull on a hauling rope pulls the ladder to one side and pivots and holds said cutterhead pivoted downwardly in the same direction of pull on said hauling rope, said pivotal movement of the cutterhead being limited by said control bracket striking said side portion of the ladder.
Claim 8
Dependent Claim
40 words
Apparatus according to claim 5, wherein said control bracket member has said portions extending for abutment against said side portions of the ladder extending above said portions for pivotal movement downward into its abutment therewith to limit its pivotal movement.
Claim 9
Dependent Claim
60 words
Apparatus according to claim 5, wherein said dredge ladder has an axially extending bearing mounted at its outer end at the center of said circular bearing member for pivotally mounting an outer end portion of the stub shaft and including means adjacent said bearing and in engagement with the stub shaft for limiting the axial movement of said stub shaft.
Claim 10
Dependent Claim
20 words
Apparatus according to claim 5, wherein said suction end is positioned within the lower half of said circular bearing member.
Claim 11
Dependent Claim
60 words
Apparatus according to claim 6, wherein said dredge ladder has an axially extending bearing mounted at its outer end at the center of said circular bearing member for pivotally mounting an outer end portion of the stub shaft and including means adjacent said bearing and in engagement with the stub shaft for limiting the axial movement of said stub shaft.
Claim 12
Dependent Claim
22 words
Apparatus according to claim 9, wherein said suction tube suction end is positioned within the lower half of said circular bearing member.
Claim 13
Dependent Claim
245 words
A hydraulic dredge cutterhead and control comprising, in combination, a dredge ladder having generally axially extending side portions and a suction tube having a suction opening adjacent the outer end of the ladder, a circular bearing member extending transversely to the longitudinal axis of the ladder at its outer end and attached to said side portions with the suction tube opening adjacently within the lower portion thereof, a stub shaft extending axially on and pivotally mounted on the ladder and extending through and beyond the center of said circular bearing member, a cutterhead having a semicircularlike cutter shaped as a part of a cylinder whose longitudinal axis extends generally transverse to the longitudinal axis of said stub shaft and a ring-shaped bearing member attached to the ends of said semicircularlike cutter having a bearing member attached on its inner surface and receiving the outer end of said stub shaft, a bracket member extending transversely to and attached to said stub shaft, said bracket member having portions extending above said side portions of said dredge ladder whereby pivotal movement to either side is limited by striking said side portions, and sheave means pivotally attached to each end of said bracket member, each sheave means adapted to receive therethrough a hauling rope for the dredge ladder, whereby a pull on a hauling rope pulls the ladder to one side and pivots and holds said cutterhead pivoted downwardly in the same direction of pull on said hauling rope.
Claim 14
Dependent Claim
245 words
A hydraulic dredge cutterhead and control comprising, in combination, a dredge ladder having generally axially extending side portions and a suction tube having a suction opening adjacent the outer end of the ladder, a circular bearing member extending transversely to the longitudinal axis of the ladder at its outer end and attached to said side portions with the suction tube opening adjacently within the lower portion thereof, a stub shaft extending axially on and pivotally mounted on the ladder and extending through and beyond the center of said circular bearing member, a cutterhead having a semicircularlike cutter shaped as a part of a cylinder whose longitudinal axis extends generally transverse to the longitudinal axis of said stub shaft and a ring-shaped bearing member attached to the ends of said semicircularlike cutter having a bearing member attached on its inner surface and receiving the outer end of said stub shaft, a bracket member extending transversely to and attached to said stub shaft, said bracket member having portions extending above said side portions of said dredge ladder whereby pivotal movement to either side is limited by striking said side portions, and sheave means pivotally attached to each end of said bracket member, each sheave means adapted to receive therethrough a hauling rope for the dredge ladder, whereby a pull on a hauling rope pulls the ladder to one side and pivots and holds said cutterhead pivoted downwardly in the same direction of pull on said hauling rope.
Claim 15
Dependent Claim
285 words
In a hydraulic dredge ladder having generally longitudinally extending side portions and a suction tube having a suction opening adjacent the outer end of the ladder, an improved cutterhead and control comprising, a stub shaft extending axially of the dredge ladder and having mounting means for mounting it on the ladder so that its outer end portion extends a relatively short distance bEyond the outer end of the ladder, a cutterhead having a body portion with oppositely disposed cutter edges extending generally parallel to the longitudinal axis of the dredge ladder and stub shaft and a cavity spaced in the body in communication with the cutter edges, means mounting the cutterhead fixedly on the extending end of the stub shaft for limited rotation therewith, means rotatably mounting the cutterhead on the end of the dredge ladder for simultaneous rotation as the cutter head and stub shaft rotate, a control bracket member extending transversely to and attached to said stub shaft at a position spaced in from said cutterhead, said bracket member having portions extending adjacent to and for abutment against said side portions of the ladder to limit the pivotal movement from side to side of said bracket and its attached stub shaft and cutterhead, sheave means pivotally attached to each end of said transversely extending control bracket member, each sheave means being adapted to receive therethrough a hauling rope for the dredge ladder, whereby a pull on a hauling rope pulls the ladder to one side and pivots and holds said cutterhead pivoted downwardly in the same direction of pull on said hauling rope, said pivotal movement of the cutter head being limited by said control bracket striking said side portion of the ladder.
Claim 16
Dependent Claim
285 words
In a hydraulic dredge ladder having generally longitudinally extending side portions and a suction tube having a suction opening adjacent the outer end of the ladder, an improved cutterhead and control comprising, a stub shaft extending axially of the dredge ladder and having mounting means for mounting it on the ladder so that its outer end portion extends a relatively short distance bEyond the outer end of the ladder, a cutterhead having a body portion with oppositely disposed cutter edges extending generally parallel to the longitudinal axis of the dredge ladder and stub shaft and a cavity spaced in the body in communication with the cutter edges, means mounting the cutterhead fixedly on the extending end of the stub shaft for limited rotation therewith, means rotatably mounting the cutterhead on the end of the dredge ladder for simultaneous rotation as the cutter head and stub shaft rotate, a control bracket member extending transversely to and attached to said stub shaft at a position spaced in from said cutterhead, said bracket member having portions extending adjacent to and for abutment against said side portions of the ladder to limit the pivotal movement from side to side of said bracket and its attached stub shaft and cutterhead, sheave means pivotally attached to each end of said transversely extending control bracket member, each sheave means being adapted to receive therethrough a hauling rope for the dredge ladder, whereby a pull on a hauling rope pulls the ladder to one side and pivots and holds said cutterhead pivoted downwardly in the same direction of pull on said hauling rope, said pivotal movement of the cutter head being limited by said control bracket striking said side portion of the ladder.
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) | 1974-08-23 | 1975-02-22 | 1975-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-23 | 1979-02-22 | 1979-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-23 | 1983-02-22 | 1983-08-24 | $7700.00 | Window Closed / Lapsed |