US3799330A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dung remover
Assignee: Alfa Laval AB
•
Filing: 1972-08-22
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Granted: 1974-03-26
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Expires: 1992-08-22
Abstract
Abstract By means responsive to reciprocation of a driving element, a dung scraper is first advanced step-by-step along a path while in a scraping position and is then returned step-by-step along the path while in a non-scraping position, said means including mechanism operable to press a clamp body against the driving element for effecting each said step during movement of the driving element in one direction and to loosen the clamp body from the driving element during movement thereof in the opposite direction.
Inventors
- 👤 S Floter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:10
CPC Classifications
A; A01; A01K; A01K1/00; A01K1/01; A01K1/0132
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
181 words
The combination of a dung scraper reciprocable along a path and having a scraping position during an advancing passage thereof along said path, the scraper having a non-scraping position during a returning passage thereof along said path, a reciprocating driving element, and means responsive to reciprocation of said driving element for first moving the scraper step-by-step in said advancing passage along the path and then moving the scraper step-by-step in said returning passage along said path, characterized in that said means comprise a clamp body and mechanism operable to effect each said passage of the scraper by pressing said body against the driving element for each said step during movement of said element in one direction and loosening the clamp body from said element during movement thereof in the opposite direction, said clamp body having one face adaPted to be pressed against the driving element and having a opposite face forming a cam-like running surface with a portion which rises and then descends, said mechanism including a pressroll journalled on the dung scraper and arranged to roll along said running surface.
Claim 2
Dependent Claim
181 words
The combination of a dung scraper reciprocable along a path and having a scraping position during an advancing passage thereof along said path, the scraper having a non-scraping position during a returning passage thereof along said path, a reciprocating driving element, and means responsive to reciprocation of said driving element for first moving the scraper step-by-step in said advancing passage along the path and then moving the scraper step-by-step in said returning passage along said path, characterized in that said means comprise a clamp body and mechanism operable to effect each said passage of the scraper by pressing said body against the driving element for each said step during movement of said element in one direction and loosening the clamp body from said element during movement thereof in the opposite direction, said clamp body having one face adaPted to be pressed against the driving element and having a opposite face forming a cam-like running surface with a portion which rises and then descends, said mechanism including a pressroll journalled on the dung scraper and arranged to roll along said running surface.
Claim 3
Dependent Claim
16 words
The combination of claim 1, in which said driving element passes through part of said scraper.
Claim 4
Dependent Claim
16 words
The combination of claim 1, in which said press-roll is adjustable vertically relative to the scraper.
Claim 5
Dependent Claim
23 words
The combination of claim 1, comprising also a housing enclosing said running surface and open at the top, and oil filling said housing.
Claim 6
Dependent Claim
17 words
The combination of claim 4, comprising also a bell enclosing said housing and open at the bottom.
Claim 7
Dependent Claim
43 words
The combination of claim 1, in which the clamp body includes first and second parts movable relative to each other and having said one face and opposite face, respectively, and resilient means on which said second part is carried by said first part.
Claim 8
Dependent Claim
33 words
The combination of claim 1, in which the dung scraper includes a guide piece having a U-shaped cross section to form legs, said driving element and clamp body being guided between said legs.
Claim 9
Dependent Claim
26 words
The combination of claim 7, comprising also a dung passage forming said path and having a longitudinal groove, said guide piece being movable in said groove.
Claim 10
Dependent Claim
17 words
The combination of claim 5, in which the press-roll is carried by the roof of the bell.
Claim 11
Dependent Claim
37 words
The combiantion of claim 1, in which said means include a fixed stop at each end of said path and engageable by the dung scraper to actuate said mechanism for reversing the direction of said step-by-step movement.
Claim 12
Dependent Claim
40 words
The combination of claim 1, in which said means include a force-transmitting connection between the reciprocating driving element and the dung scraper and operable to pendulate in response to a reversal of the direction of movement of said driving element.
References Cited (Backward Citations)
US3306435A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-25 | 1977-09-24 | 1978-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-25 | 1981-09-24 | 1982-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-25 | 1985-09-24 | 1986-03-26 | $7700.00 | Window Closed / Lapsed |