Patent US3577956A successfully refreshed from Google Patents.
US3577956A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Partition wall for sheds having automatic dung scraper
Assignee: Alfa Laval AB
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Filing: 1969-05-16
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Granted: 1971-05-11
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Expires: 1989-05-16
Abstract
Abstract The shed floor includes a cleaning area along which a scraper is movable automatically to remove dung. A partition wall has an opening located above the cleaning area and so dimensioned as to permit a reclining animal to pass through the opening in the event that the animal is entrained by the scraper. While thus passing through the opening, the reclining animal displaces a yieldable barrier means from its normal position extending across the opening, the barrier means having a lower edge spaced above the cleaning area a sufficient distance to permit the scraper to pass freely under the barrier means.
Inventors
- 👤 Adolf G Forster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:03
CPC Classifications
A; A01; A01K; A01K1/00; A01K1/01; A01K1/0132; A01K1/0005
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
111 words
In combination with an animal shed having a floor including a cleaning area from which dung is to be removed and also having a scraper movable along said cleaning area to remove dung therefrom, a partition wall having an opening above the cleaning area, said opening being of sufficient height so that a reclining animal can pass therethrough, and yieldable barrier means having a normal position extending across said opening and displaceable from said normal position by said reclining animal while passing through the opening, said barrier means having a lower edge spaced above said cleaning area a sufficient distance to permit the scraper to pass freely under the barrier means.
Claim 2
Dependent Claim
111 words
In combination with an animal shed having a floor including a cleaning area from which dung is to be removed and also having a scraper movable along said cleaning area to remove dung therefrom, a partition wall having an opening above the cleaning area, said opening being of sufficient height so that a reclining animal can pass therethrough, and yieldable barrier means having a normal position extending across said opening and displaceable from said normal position by said reclining animal while passing through the opening, said barrier means having a lower edge spaced above said cleaning area a sufficient distance to permit the scraper to pass freely under the barrier means.
Claim 3
Dependent Claim
44 words
A combination according to claim 1, in which said barrier means include rakelike means substantially filling said opening in said normal position and having downwardly directed points, the rakelike means being mounted at the upper portion thereof for swinging movements about a horizontal axis.
Claim 4
Dependent Claim
39 words
A combination accordIng to claim 1, in which said barrier means include plate means substantially filling said opening in said normal position, the plate means being mounted at the upper portion thereof for swinging movements about a horizontal axis.
Claim 5
Dependent Claim
26 words
A combination according to claim 1, in which said barrier means include lattice means mounted at the upper portion thereof for displacement about a horizontal axis.
Claim 6
Dependent Claim
35 words
A combination according to claim 1, in which said barrier means include a horizontal shaft extending parallel to the plane of the partition wall, and rods suspended on the shaft and extending freely downward therefrom.
Claim 7
Dependent Claim
19 words
A combination according to claim 1, in which said barrier means include a curtain of freely hanging flexible elements.
Claim 8
Dependent Claim
25 words
A combination according to claim 1, in which said barrier means include a flexible element extending generally transversely between the lateral edges of said opening.
Claim 9
Dependent Claim
15 words
A combination according to claim 7, in which said flexible element is a coil spring.
Claim 10
Dependent Claim
25 words
A combination according to claim 1, comprising also biasing means operatively connected to the barrier means for returning the barrier means to said normal position.
Claim 11
Dependent Claim
16 words
A combination according to claim 1, in which said barrier means are made of resilient material.
Claim 12
Dependent Claim
40 words
A combination according to claim 1, in which said barrier means are electrically conductive, the combination comprising also insulating means on which the barrier means are suspended, and means connected to the barrier means for supplying an electric current thereto.
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) | 1974-05-10 | 1974-11-09 | 1975-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-10 | 1978-11-09 | 1979-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-10 | 1982-11-09 | 1983-05-11 | $7700.00 | Window Closed / Lapsed |