Patent US4230435A successfully refreshed from Google Patents.
US4230435A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Backhoe finishing tool
Assignee: Individual
•
Filing: 1978-07-21
•
Granted: 1980-10-28
•
Expires: 1998-07-21
Abstract
Abstract A surface finishing tool for a backhoe comprising a pair of arms which are pivoted on the brackets which extend along the back of the bucket so as to depend therefrom. A scraper of approximately the width of the bracket is welded across the ends of the arms and a stop bar on the arms engages the brackets when the bucket is in its load-carrying position whereby the bucket may be pulled to drag the scraper along the surface. When in the raking or digging positions the arms merely hang down along the back of the bucket with the scraper blade free of engagement with ground.
Inventors
- 👤 Albert J. Azevedo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:39
CPC Classifications
E; E02; E02F; E02F5/00; E02F5/02; E02F5/025; E02F3/00; E02F3/04; E02F3/96; E02F3/962
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
161 words
In combination with a backhoe including: a boom; a bucket pivotally mounted on the end of said boom; a row of teeth along the lip of said bucket; a pair of generally parallel brackets along the back of said bucket; a pair of links connecting said bracket and said boom; and hydraulic means connecting said boom and said links for tilting said bucket between a raking position with the ends of said teeth disposed downwardly, digging position with said teeth disposed downwardly and in the direction of said boom, and a carrying position with said teeth disposed upwardly; a surface finisher means for scraping and leveling a trench comprising: an arm pivoted on said brackets to depend therefrom; a scraper of approximately the width of said bucket and having a blunt, flat bottom edge fixed on the end of said arm; and stop means on said arm to limit pivotal movement thereof away from said bucket when in said carrying position.
Claim 2
Dependent Claim
161 words
In combination with a backhoe including: a boom; a bucket pivotally mounted on the end of said boom; a row of teeth along the lip of said bucket; a pair of generally parallel brackets along the back of said bucket; a pair of links connecting said bracket and said boom; and hydraulic means connecting said boom and said links for tilting said bucket between a raking position with the ends of said teeth disposed downwardly, digging position with said teeth disposed downwardly and in the direction of said boom, and a carrying position with said teeth disposed upwardly; a surface finisher means for scraping and leveling a trench comprising: an arm pivoted on said brackets to depend therefrom; a scraper of approximately the width of said bucket and having a blunt, flat bottom edge fixed on the end of said arm; and stop means on said arm to limit pivotal movement thereof away from said bucket when in said carrying position.
Claim 3
Dependent Claim
25 words
The combination defined by claim 1 wherein: there are a pair of arms pivoted in said brackets; and said scraper is secured across said arms.
Claim 4
Dependent Claim
41 words
The combination defined by claim 2 including: an extension on each of said arms to the opposite side of the pivotal axis thereof; a stop bar welded across said extension engagable across brackets when said bucket is in said carrying position.
References Cited (Backward Citations)
US2840931A
Cited
US3109248A
Cited
US3702712A
Cited
US3778111A
Cited
US3789524A
Cited
US4041624A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-10-28 | 1984-04-28 | 1984-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-28 | 1988-04-28 | 1988-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-28 | 1992-04-28 | 1992-10-28 | $7700.00 | Window Closed / Lapsed |