US3677604A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic control for hydraulic bucket having reciprocating teeth
Assignee: Poclain SA
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Filing: 1970-09-23
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Granted: 1972-07-18
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Expires: 1990-09-23
Abstract
Abstract This invention relates to a device for the hydraulic control of a bucket in public works machines provided with at least one movable tooth coupled to a hydraulic hammer, comprising at least one double-action hydraulic jack coupled between the bucket and the structural element on which said bucket is mounted to oscillate, wherein the feed conduits and the delivery conduits of the jack and hydraulic hammers coupled respectively to the bucket and to each of the movable teeth are respectively connected in parallel.
Inventors
- 👤 Pierre J Leyrat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:58
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/28; E02F3/36; E02F3/40; E02F3/402; E02F3/405; Y; Y10; Y10S; Y10S37/00; Y10S37/904
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
105 words
In an hydraulic bucket comprising a bucket pivotally mounted to a structUral member, and at least one double-action hydraulic jack coupled between said bucket and said structural member to pivot said bucket, the improvement which comprises: at least one movable tooth mounted to the front face of said bucket; at least one hydraulic hammer mounted to reciprocate said tooth; feed conduit means connecting in parallel said jack and hammer to provide hydraulic fluid thereto; delivery conduit means connecting in parallel said hammer and said jack for return of said hydraulic fluid; and non-return valve means positioned on said delivery conduit means downstream of said hammer.
Claim 2
Dependent Claim
105 words
In an hydraulic bucket comprising a bucket pivotally mounted to a structUral member, and at least one double-action hydraulic jack coupled between said bucket and said structural member to pivot said bucket, the improvement which comprises: at least one movable tooth mounted to the front face of said bucket; at least one hydraulic hammer mounted to reciprocate said tooth; feed conduit means connecting in parallel said jack and hammer to provide hydraulic fluid thereto; delivery conduit means connecting in parallel said hammer and said jack for return of said hydraulic fluid; and non-return valve means positioned on said delivery conduit means downstream of said hammer.
Claim 3
Dependent Claim
40 words
Apparatus of claim 1 wherein said bucket includes a plurality of movable teeth; a plurality of corresponding hydraulic hammers and a plurality of corresponding non-return valve means, each of said non-return valve means being positioned downstream of each respective hammer.
Claim 4
Dependent Claim
60 words
Apparatus of claim 1 wherein said feed conduit means is coupled to said jack in such manner as to correspond to the penetration phase of said bucket; and said delivery conduit means is further coupled to said jack downstream of said non-return valve means whereby said jack may be returned upon reversal of fluid flow in said delivery conduit means.
Claim 5
Dependent Claim
21 words
Apparatus of claim 1 wherein there is a plurality of teeth and a single hydraulic hammer mounted to reciprocate said teeth.
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) | 1975-07-18 | 1976-01-17 | 1976-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-18 | 1980-01-17 | 1980-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-18 | 1984-01-17 | 1984-07-18 | $7700.00 | Window Closed / Lapsed |