US4512090A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Excavator bucket with retractable scraper and scarifier
Assignee: Individual
•
Filing: 1983-11-25
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Granted: 1985-04-23
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Expires: 2003-11-25
Abstract
Abstract A backhoe is provided with a retractable scraper and scarifier. The backhoe excavator bucket includes a stationary first mounting plate and a second plate pivotally mounted thereon for rotational movement with respect thereto and which carries a scarifier assembly. The scarifier assembly is movable in a plane parallel to the second plate. The second plate is provided with a lower rearwardly curved cutting edge or scraper portion containing slots through which the scarifier teeth may be extended or retracted. Rotational movement of the second plate with respect to the first and movement of the scarifier assembly with respect to the second plate is accomplished by hydraulic or pneumatic cylinders controlled by the operator of the prime mover.
Inventors
- 👤 Jeff Billings
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:35
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/76; E02F3/80; E02F3/815; E02F3/7604; E02F3/96; E02F3/962; Y; Y10; Y10S; Y10S414/00; Y10S414/125
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
76 words
An excavator bucket for attachment to earth moving vehicles comprising a bucket having spaced parallel side walls, an open front, and a curved, outwardly convex rear wall having a cutting edge at said open front, a curved, rearwardly facing scraper member mounted on said bucket rear wall for pivotal movement relative thereto, a retractable scarifier assembly carried by said scraper member and vertically movable relative thereto, and means for controlling vertical movement of said scarifier assembly.
Claim 2
Dependent Claim
76 words
An excavator bucket for attachment to earth moving vehicles comprising a bucket having spaced parallel side walls, an open front, and a curved, outwardly convex rear wall having a cutting edge at said open front, a curved, rearwardly facing scraper member mounted on said bucket rear wall for pivotal movement relative thereto, a retractable scarifier assembly carried by said scraper member and vertically movable relative thereto, and means for controlling vertical movement of said scarifier assembly.
Claim 3
Dependent Claim
43 words
An excavator bucket according to claim 1 in which said scarifier assembly comprises a horizontal crossmember having a plurality of teeth individually attached to and depending downwardly therefrom, and means supported on said bucket rear wall guiding said scarifier teeth for vertical movement.
Claim 4
Dependent Claim
25 words
An excavator bucket according to claim 2 in which said teeth have a curved lower portion and are positioned for backing against said scraper member.
Claim 5
Dependent Claim
17 words
An excavator bucket according to claim 1 including means for controlling pivotal movement of said scraper member.
Claim 6
Dependent Claim
27 words
An excavator bucket according to claim 4 in which said means for moving said scarafier assembly and for moving said scraper member each being fluid actuated means.
Claim 7
Dependent Claim
16 words
An excavator bucket according to claim 5 in which said fluid actuated means comprises hydraulic cylinders.
Claim 8
Dependent Claim
17 words
An excavator bucket according to claim 5 in which said fluid actuated means comprises a pneumatic cylinder.
Claim 9
Dependent Claim
52 words
An excavator bucket according to claim 1 in which said bucket has a first stationary plate secured to said rear wall, a second plate pivotally mounted on said first plate for rotational movement with respect thereto, and said scarifier assembly being carried by said second plate and vertically movable with respect thereto.
Claim 10
Dependent Claim
32 words
An excavator bucket according to claim 8 including means for controlling rotational movement of said second plate, and means on said second plate for controlling vertical movement of said scarifier assembly thereon.
Claim 11
Dependent Claim
20 words
An excavator bucket according to claim 8 in which said second plate has a cutting edge portion curved outwardly therefrom.
Claim 12
Dependent Claim
25 words
An excavator bucket according to claim 10 in which said cutting edge portion is provided with a plurality of slots to slidably receive scarifier teeth.
Claim 13
Dependent Claim
37 words
An excavator bucket according to claim 11 in which said scarifier assembly comprises a horizontal crossmember having a plurality of teeth individually releasably attached thereto and depending downwardly therefrom and movable vertically through said cutting edge slots.
Claim 14
Dependent Claim
25 words
An excavator bucket according to claim 12 in which said means for controlling rotational movement and said means for controlling vertical movement are hydraulic cylinders.
Claim 15
Dependent Claim
25 words
An excavator bucket according to claim 12 in which said means for controlling rotational movement and said means for controlling vertical movement are pneumatic cylinders.
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) | 1988-04-22 | 1988-10-22 | 1989-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-22 | 1992-10-22 | 1993-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-22 | 1996-10-22 | 1997-04-23 | $7700.00 | Window Closed / Lapsed |