US3937345A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shovel loader with ejector bucket
Assignee: Atlas Copco Construction and Mining Technique AB
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Filing: 1974-11-15
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Granted: 1976-02-10
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Expires: 1994-11-15
Abstract
Abstract A loader vehicle has a digging and scooping buchet equipped with a push plate ejector for dumping without tipping the bucket downward. The ejector plate is reciprocated in the bucket by a telescopic cylinder having a piston rod connected to a bracket projecting from the rear side of the bucket. In raising the bucket to dumping position the bracket and cylinder swing down between the wheels in a clear space made available by the absence of the conventional axle and differential. In order to provide this clear space the wheels are driven by individual hydraulic motors.
Inventors
- 👤 Donald L. Countryman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:41
CPC Classifications
E; E02; E02F; E02F9/00; E02F9/08; E02F9/0841; E02F3/00; E02F3/04; E02F3/28; E02F3/36; E02F3/40; E02F3/407
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
228 words
A shovel loader comprising a vehicle frame supported by wheels on its opposite sides, drive means for said wheels providing an open space between said wheels free of an interconnecting axle, a loader bucket in front of said wheels having bottom, side and back walls and a scooping lip on the front end of said bottom wall, hinge pins pivotally mounting said bucket on said frame adjacent the lower portion of said back wall at the back end of said bottom wall, hydraulic cylinder and piston means connected between said frame and the upper portion of said back wall for pivoting said bucket to move said scooping lip between a depressed digging position and an elevated dumping position, said bottom wall being inclined upward toward its front end in said dumping position, a transverse ejector plate in said bucket, a stirrup bracket extending rearward from said back wall and hinge pins into said open space between said wheels, a hydraulic cylinder mounted on the rear side of said ejector plate and extending through an opening in said back wall, and a piston rod in said cylinder connected to a pin in the rear end of said stirrup bracket for reciprocating said ejector plate in said bucket, said stirrup bracket and piston rod swinging down between lower portions of said wheels in said elevated position of said bucket. .
Claim 2
Dependent Claim
228 words
A shovel loader comprising a vehicle frame supported by wheels on its opposite sides, drive means for said wheels providing an open space between said wheels free of an interconnecting axle, a loader bucket in front of said wheels having bottom, side and back walls and a scooping lip on the front end of said bottom wall, hinge pins pivotally mounting said bucket on said frame adjacent the lower portion of said back wall at the back end of said bottom wall, hydraulic cylinder and piston means connected between said frame and the upper portion of said back wall for pivoting said bucket to move said scooping lip between a depressed digging position and an elevated dumping position, said bottom wall being inclined upward toward its front end in said dumping position, a transverse ejector plate in said bucket, a stirrup bracket extending rearward from said back wall and hinge pins into said open space between said wheels, a hydraulic cylinder mounted on the rear side of said ejector plate and extending through an opening in said back wall, and a piston rod in said cylinder connected to a pin in the rear end of said stirrup bracket for reciprocating said ejector plate in said bucket, said stirrup bracket and piston rod swinging down between lower portions of said wheels in said elevated position of said bucket. .
Claim 3
Dependent Claim
27 words
A shovel loader as defined in claim 1, said stirrup bracket comprising a pair of vertical plates on opposite sides of said last cylinder and piston rod.
Claim 4
Dependent Claim
26 words
A shovel loader as defined in claim 1 including a pair of hydraulic connections in said piston rod communicating with opposite ends of said last cylinder.
Claim 5
Dependent Claim
18 words
A shovel loader as defined in claim 1, said drive means comprising individual hydraulic motors for said wheels.
Claim 6
Dependent Claim
61 words
A shovel loader as defined in claim 4 comprising an articulated vehicle having a body section carrying an engine, said body section being connected to said vehicle frame by a vertical steering pivot, a pair of wheels supporting said body section, and drive means comprising individual hydraulic motors for said pair of wheels, to provide four wheel drive for said loader.
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) | 1979-02-09 | 1979-08-11 | 1980-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-09 | 1983-08-11 | 1984-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-09 | 1987-08-11 | 1988-02-10 | $7700.00 | Window Closed / Lapsed |