US3792786A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Single-bucket excavator
Assignee: Individual
•
Filing: 1972-02-17
•
Granted: 1974-02-19
•
Expires: 1992-02-17
Abstract
Abstract A bucket suspension system for an excavator in the form of a six-bar mechanism consisting of two combined four-bar mechanisms whose common links are the boom and the arm. One of the four bar mechanisms is a parallelogram; the other four-bar mechanism, besides the boom and arm, comprises as one of the links a power cylinder which is hingedly connected to the turntable and the arm thus making the turntable a stationary link of this four-bar mechanism. Such suspension eliminates changing of the cutting angle during the working travel of the bucket.
Inventors
- 👤 V Svirsky
- 👤 V Shklovsky
- 👤 V Goikhburg
- 👤 G Finikov
- 👤 A Litvak
- 👤 P Khanokh
- 👤 L Averynov
- 👤 N Gavrilov
- 👤 A Fedorov
- 👤 G Piskarev
- 👤 M Kuperman
- 👤 O Smirnov
- 👤 A Rozenblat
- 👤 A Rannev
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:51
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/28; E02F3/30; E02F3/308
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
312 words
A single bucket excavator comprising a turntable, a boom pivotably connected to the turntable, a bucket arm pivotably connected to the boom, a six-bar bucket suspension constituted by two combined four-bar mechanisms with the boom and arm being common links thereof, a first power cylinder pivotably connected at one end thereof to the turntable and at the other end thereof to the bucket arm, said power cylinder serving as one of the links of one four-bar mechanism, the second four-bar mechanism including a rod extending parallel to said bucket arm and pivotably connected to said boom, and a bracket to which said bucket, said arm and said rod are pivotably connected individually and directly such that the second four-bar mechanism is a parallelogram linkage with the rod and bucket arm as one pair of links, said rod and arm constituting the sole connection between the boom and bucket, the other pair of links of the second four-bar mechanism being unequal in length to the first pair and constituted by said bracket and the portion of the boom between the pivotal connections thereof to the rod and bucket arm, said fiRst power cylinder and said boom being pivotably connected to said turntable at spaced locations, the length of the turntable between said locations representing another of the links of said one four-bar mechanism, said bucket arm including an integral projection to which said first power cylinder is pivotably connected at a location offset from the pivotable connection of the bucket arm to the boom, the length of the bucket arm between the connection thereof to said first cylinder and said boom representing another of the links of said one fourbar mechanism such that by virtue of said integral projection, said arm forms a respective link in both four-bar mechanisms, and a second power cylinder pivotably connected to said boom and said bucket arm.
Claim 2
Dependent Claim
312 words
A single bucket excavator comprising a turntable, a boom pivotably connected to the turntable, a bucket arm pivotably connected to the boom, a six-bar bucket suspension constituted by two combined four-bar mechanisms with the boom and arm being common links thereof, a first power cylinder pivotably connected at one end thereof to the turntable and at the other end thereof to the bucket arm, said power cylinder serving as one of the links of one four-bar mechanism, the second four-bar mechanism including a rod extending parallel to said bucket arm and pivotably connected to said boom, and a bracket to which said bucket, said arm and said rod are pivotably connected individually and directly such that the second four-bar mechanism is a parallelogram linkage with the rod and bucket arm as one pair of links, said rod and arm constituting the sole connection between the boom and bucket, the other pair of links of the second four-bar mechanism being unequal in length to the first pair and constituted by said bracket and the portion of the boom between the pivotal connections thereof to the rod and bucket arm, said fiRst power cylinder and said boom being pivotably connected to said turntable at spaced locations, the length of the turntable between said locations representing another of the links of said one four-bar mechanism, said bucket arm including an integral projection to which said first power cylinder is pivotably connected at a location offset from the pivotable connection of the bucket arm to the boom, the length of the bucket arm between the connection thereof to said first cylinder and said boom representing another of the links of said one fourbar mechanism such that by virtue of said integral projection, said arm forms a respective link in both four-bar mechanisms, and a second power cylinder pivotably connected to said boom and said bucket arm.
References Cited (Backward Citations)
US3080076A
Cited
US3208610A
Cited
FR1353540A
Cited
US3239083A
Cited
US3463335A
Cited
US3658198A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-18 | 1977-08-20 | 1978-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-18 | 1981-08-20 | 1982-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-18 | 1985-08-20 | 1986-02-19 | $7700.00 | Window Closed / Lapsed |