Patent US3789524A successfully refreshed from Google Patents.
US3789524A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe cradler attachment for excavator bucket
Assignee: Individual
•
Filing: 1972-10-10
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Granted: 1974-02-05
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Expires: 1992-10-10
Abstract
Abstract An excavating bucket, such as may be used on a back-hoe for digging a trench. The bucket is provided with a recessed back in which is mounted adjacent the front edge a hinged template. The template is normally swung back into the recess but is optionally swung outward and forward by pressure operated cylinders at the back of the bucket under control of the operator. In its extended position below the front edge of the bucket, the template scoops a cradle or channel in the bottom of the trench for pipe to seat in.
Inventors
- 👤 D Mashuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:45
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/28; E02F3/36; E02F3/40
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
50 words
An excavating bucket having two sides and a bottom plate member thereBetween providing a bottom and back for the bucket, wherein the improvement comprises a cradle-forming template pivotally depending from the bottom of the bucket, and power cylinder means mounted on the back of said bucket for actuating said template.
Claim 2
Dependent Claim
50 words
An excavating bucket having two sides and a bottom plate member thereBetween providing a bottom and back for the bucket, wherein the improvement comprises a cradle-forming template pivotally depending from the bottom of the bucket, and power cylinder means mounted on the back of said bucket for actuating said template.
Claim 3
Dependent Claim
64 words
An excavating bucket according to claim 1, wherein the said two sides and bottom plate cooperate to form a recess on the bottom and back of the bucket, said template having a retracted position in which it is positioned entirely within the said recess and having an extended position in which it projects out of said recess and below the bottom of the bucket.
Claim 4
Dependent Claim
54 words
An excavating bucket according to claim 2, wherein said power cylinder means is double-acting, said cylinder means being effective when actuated in one direction to move said template from its retracted to its extended position and effective when actuated in the opposite direction to move said template from its extended to its retracted position.
Claim 5
Dependent Claim
47 words
An excavating bucket according to claim 1, wherein said power cylinder means is pivotally mounted at one end on the back of the bucket, and has piston rod means projecting through the other end, and wherein mechanical linkage means connects said piston rod means and said template.
Claim 6
Dependent Claim
39 words
An excavating bucket according to claim 4, wherein said mechanical linkage means comprises a plurality of linkage rods, and a plurality of cam links pivotally attached to said bottom plate, by which cam links said linkage rods are supported.
Claim 7
Dependent Claim
19 words
An excavating bucket according to claim 1, wherein biasing spring means constantly urges said template toward an extended position.
Claim 8
Dependent Claim
57 words
An excavating bucket according to claim 1, wherein hinge means is provided for pivotally mounting said template on said bottom plate, said hinge means comprising a hinge pin attached to the bottom plate, and wherein torsion spring means is mounted coaxially with said hinge pin and constantly exerts a force urging said template toward an extended position.
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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) | 1977-02-04 | 1977-08-06 | 1978-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-04 | 1981-08-06 | 1982-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-04 | 1985-08-06 | 1986-02-05 | $7700.00 | Window Closed / Lapsed |