US3834566A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe handling attachment for a backhoe
Assignee: Hilfiker Pipe Co
•
Filing: 1973-01-18
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Granted: 1974-09-10
•
Expires: 1993-01-18
Abstract
Abstract A conventional hydraulically actuated backhoe excavator adapted to handle heavy and cumbersome pipe sections by a shaft attached to and extending from the rear of the bucket such that it rotates with the bucket in the plane of the boom and stick without significantly impairing the excavating capabilities of the backhoe.
Inventors
- 👤 W Hilfiker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:22
CPC Classifications
B; B66; B66C; B66C1/00; B66C1/68; E; E02; E02F; E02F3/00; E02F3/04; E02F3/96; E02F3/963; F; F16; F16L; F16L1/00; F16L1/024; F16L1/028; F16L1/036; Y; Y10; Y10S; Y10S414/00; Y10S414/123
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
205 words
In a backhoe excavator including an hydraulically powered and controlled boom, stick and bucket, said bucket having a rear lever arm structure to which an hydraulic actuator for the bucket is connected, the improvement comprising, in combination therewith, a longitudinal shaft adapted for insertion in pipe sections, said shaft being secured to the rear lever arm structure of the bucket for pivotal movement relative thereto between an operable position extending rearwardly from the backhoe for movement with the lever arm structure to provide a rearward extension of the structure and an inoperable position swung upwardly relative to the lever arm structure wherein the shaft is free to pivot relative to the structure so as to avoid interfering with pivotal movement of the bucket relative to the stick and means for selectively securing the shaft in the inoperative position, said shaft, when in the operative position, adapting the backhoe for movement of a pipe section from a first position to a second position by inserting said rearward extension longitudinally into the interior of said pipe section and then lifting and moving said pipe section disposed on the shaft from a first position to a second position by appropriate hydraulic manipulation of said boom, stick and bucket.
Claim 2
Dependent Claim
205 words
In a backhoe excavator including an hydraulically powered and controlled boom, stick and bucket, said bucket having a rear lever arm structure to which an hydraulic actuator for the bucket is connected, the improvement comprising, in combination therewith, a longitudinal shaft adapted for insertion in pipe sections, said shaft being secured to the rear lever arm structure of the bucket for pivotal movement relative thereto between an operable position extending rearwardly from the backhoe for movement with the lever arm structure to provide a rearward extension of the structure and an inoperable position swung upwardly relative to the lever arm structure wherein the shaft is free to pivot relative to the structure so as to avoid interfering with pivotal movement of the bucket relative to the stick and means for selectively securing the shaft in the inoperative position, said shaft, when in the operative position, adapting the backhoe for movement of a pipe section from a first position to a second position by inserting said rearward extension longitudinally into the interior of said pipe section and then lifting and moving said pipe section disposed on the shaft from a first position to a second position by appropriate hydraulic manipulation of said boom, stick and bucket.
Claim 3
Dependent Claim
34 words
In a backhoe excavator according to claim 1 the improvement being further characterized in that a single pin connects the shaft and the hydraulic actuator for the bucket to the rear lever arm structure.
Claim 4
Dependent Claim
27 words
In a backhoe excavator according to claim 2, the improvement further comprising means for preventing the shaft from pivoting downward on said pin below thE operable position.
Claim 5
Dependent Claim
90 words
In a backhoe excavator according to claim 3, the improvement being further characterized in that the means for preventing said shaft from pivoting downward below the operable position comprises in combination a structural stop integral with the rear lever arm structure and a cooperative receiving element integral with the shaft and adapted for engaging said stop, said stop being located below said pin connection between the shaft and rear lever arm structure whereby said receiving element assumes abutting engagement with said stop when the shaft is in the operable position.
Claim 6
Dependent Claim
36 words
In a backhoe excavator accordin to claim 4, the improvement being further characterized in that the stop can be removed from the rear lever arm structure when the shaft is pivoted upward to the inoperable position.
Claim 7
Dependent Claim
69 words
In a backhoe excavator according to claim 4, the improvement being further characterized in that said stop is positioned on the rear lever arm structure of the bucket such that it avoids engaging the receiving structure of the shaft when the shaft is pivoted into the inoperable position to thereby allow the bucket to pivot freely about a fulcrum connection connecting the bucket with the stick of the backhoe.
Claim 8
Dependent Claim
69 words
In a backhoe excavator according to claim 1, the improvement further characterized in that the shaft comprises an abutment plate proximate the end thereof secured to the lever arm structure, said abutment plate being generally perpendicular to and extending upward from the shaft, whereby said plate engages the end of a pipe section when said shaft is inserted therein to thereby allow the backhoe to push said pipe section.
Claim 9
Dependent Claim
30 words
In a backhoe excavator according to claim 1, the improvement further characterized in that the shaft has a linear dimension greater than one-half the longitudinal dimension of said pipe sections.
Claim 10
Dependent Claim
99 words
In a backhoe excavator including an hydraulically powered and controlled boom, stick and bucket assembly, the improvement comprising a shaft secured to and extending from said assembly for pivotal movement relative thereto between an operable position extending rearwardly of the backhoe for movement with the bucket to provide a rearward extension thereof and an inoperable position swung upwardly relative to the bucket wherein the shaft is free to pivot relative to the bucket so as to avoid interfering with pivotal movement of the bucket relative to the stick and means for selectively securing the shaft in the inoperative position.
Claim 11
Dependent Claim
99 words
In a backhoe excavator including an hydraulically powered and controlled boom, stick and bucket assembly, the improvement comprising a shaft secured to and extending from said assembly for pivotal movement relative thereto between an operable position extending rearwardly of the backhoe for movement with the bucket to provide a rearward extension thereof and an inoperable position swung upwardly relative to the bucket wherein the shaft is free to pivot relative to the bucket so as to avoid interfering with pivotal movement of the bucket relative to the stick and means for selectively securing the shaft in the inoperative position.
Claim 12
Dependent Claim
30 words
In a backhoe excavator according to claim 9 further comprising attachment means on the shaft for securing a cable thereto to facilitate the shaft for use as a lifting crane.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |