US3703973A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine to be used as a crane, loader and/or excavator
Assignee: Individual
•
Filing: 1970-12-11
•
Granted: 1972-11-28
•
Expires: 1990-12-11
Abstract
Abstract A crane loader or excavator having first and second booms pivoted end to end, plus an auxiliary boom connected intermediate its ends to an intermediate portion of said first boom. Hydraulic cylinders are connected at one end of the auxiliary boom to said second boom and at the other end of the auxiliary boom to the base vehicle and an arm pivotally connected at each end to the auxiliary boom and the base vehicle.
Inventors
- 👤 Gustav Lennart Nilsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:19
CPC Classifications
E; E02; E02F; E02F9/00; E02F9/08; E02F9/085; B; B66; B66C; B66C13/00; B66C13/18; E02F3/00; E02F3/04; E02F3/28; E02F3/30; E02F3/302; E02F3/308; B66C2700/00; B66C2700/06; B66C2700/062
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
212 words
A machine that may be used as a crane, loader, and/or excavator, comprising in combination: a. a mobile chassis, b. a first boom that has an outer end, an inner end and a portion intermediate said inner and outer ends, said inner end being pivotally attached to said chassis, c. a second boom that has an outer end, an inner end and a portion intermediate said inner and outer ends, said inner end of said second boom being pivotally connected to the outer end of said first boom, d. a working appliance attached to the outer end of said second boom, e. an auxiliary boom that has an inner end, and outer end and a portion intermediate said inner and outer ends, f. the intermediate portion of said first boom being pivotally interconnected to the intermediate portion of said auxiliary boom, g. a first hydraulic motor arrangement interconnecting the outer end of said auxiliary boom with an intermediate portion of said second boom, h. a second hydraulic motor arrangement interconnecting the inner end of said auxiliary boom with said chassis, i. an arm pivotally interconnecting the intermediate portion of said auxiliary boom with said chassis, and j. means for moving said working appliance with respect to the end of said second boom.
Claim 2
Dependent Claim
212 words
A machine that may be used as a crane, loader, and/or excavator, comprising in combination: a. a mobile chassis, b. a first boom that has an outer end, an inner end and a portion intermediate said inner and outer ends, said inner end being pivotally attached to said chassis, c. a second boom that has an outer end, an inner end and a portion intermediate said inner and outer ends, said inner end of said second boom being pivotally connected to the outer end of said first boom, d. a working appliance attached to the outer end of said second boom, e. an auxiliary boom that has an inner end, and outer end and a portion intermediate said inner and outer ends, f. the intermediate portion of said first boom being pivotally interconnected to the intermediate portion of said auxiliary boom, g. a first hydraulic motor arrangement interconnecting the outer end of said auxiliary boom with an intermediate portion of said second boom, h. a second hydraulic motor arrangement interconnecting the inner end of said auxiliary boom with said chassis, i. an arm pivotally interconnecting the intermediate portion of said auxiliary boom with said chassis, and j. means for moving said working appliance with respect to the end of said second boom.
Claim 3
Dependent Claim
22 words
A machine in accordance with claim 1 wherein at least one of said hydraulic motor arrangements consists of a simple piston-and-cylinder device.
Claim 4
Dependent Claim
82 words
A loader and/or excavator equipped with an excavator bucket in accordance with claim 1, characterized in that the first boom is pivoted at a low level on the chassis; that the excavator bucket, the first and second booms and the auxiliary boom are capable of being retracted practically fully within the limits of the horizontal outside dimensions of the machine; that the first and second boom are almost the same length and are positioned largely parallel to one another when fully retracted.
Claim 5
Dependent Claim
65 words
A machine in accordance with claim 3, characterized in that the maximum distance between the pivot of the excavator bucket on the second boom and the pivot of the first boom on the chassis in between about 1.5 - 2.5 times the greatest distance between the point of attachment of the first boom on the lastnamed pivot and the horizontal outside dimension of the machine.
Claim 6
Dependent Claim
56 words
A machine in accordance with claim 3 characterized in that the maximum distance between the pivot of the excavator bucket on the second boom and the pivot of the first boom on the chassis is between 1.2 - 2 times the greatest height above ground level of the machine when the excavator bucket is fully retracted.
Claim 7
Dependent Claim
45 words
A machine in accordance with claim 3, which machine is supported on wheels, characterized in that the wheels on at least on axle are retractable into the chassis of the machine, and the chassis in the vicinity of the retractable wheels is provided with legs.
Claim 8
Dependent Claim
14 words
A machine in accordance with claim 6 characterized by the wheels being individually retractable.
Claim 9
Dependent Claim
19 words
A machine in accordance with claim 6 wherein all the wheels of the machine are retractable into the chassis.
Claim 10
Dependent Claim
44 words
A machine in accordance with claim 6 wherein each of the retractable wheels is carried, so as to be capable of rotation, at the end of its own swing arm device, the other end of which is pivoted inn the chassis of the machine.
Claim 11
Dependent Claim
57 words
A machine in accordance with claim 9, characterized in that the said other end of the swing arm device is pivoted at one end of a largely horizontal and rectangular frame or box, whereby the swing arm device extends towards the center of the frame or box and there carries the wheel at the said one end.
Claim 12
Dependent Claim
37 words
A machine in accordance with claim 10 wherein the swing arm device is mainly horizontal when the wheels are lowered to the ground and is at an angle with the horizontal plane when the wheels are retracted.
Claim 13
Dependent Claim
71 words
A machine in accordance with claim 11, characterized in that the pivot of the swing arm device is situated near the bottom of the frame, and by the fact that a hydraulic mechanism for its operation consists of one or more hydraulic motors which act between a pivot at one end portion, and near the top, of the frame, and a pivot situated between the ends of the swing arm device.
Claim 14
Dependent Claim
31 words
A machine in accordance with claim 12 wherein one end portion of the frame projects below the general plane of the frame and forms a leg when the wheel is retracted.
Claim 15
Dependent Claim
38 words
A machine in accordance with claim 6 wherein the retractable wheels are partially retractable into the chassis, in order to permit reduction of the height of the machine while it is still supported on the partially retracted wheel(s).
Claim 16
Dependent Claim
66 words
A machine in accordance with claim 6 wherein the machine is capable of lifTing up the chassis, when the excavator bucket is resting on the ground, with the aid of the booms operating the excavator bucket, in order to lower the retractable wheels to the ground, and the wheels are capable of being secured in the lowered position with the aid of a mechanical locking device.
Claim 17
Dependent Claim
63 words
A machine in accordance with claim 3 wherein the second boom and the operating mechanism interacting with the second boom in order to operate the excavator bucket is designed in such a way that the bucket can be easily demounted and replaced by a drag boom with drag shovel attached, which drag boom is thereby capable of operation by the said operating mechanism.
References Cited (Backward Citations)
US3141561A
Cited
US3490629A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-11-28 | 1976-05-29 | 1976-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-28 | 1980-05-29 | 1980-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-28 | 1984-05-29 | 1984-11-28 | $7700.00 | Window Closed / Lapsed |