US3796505A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drag roller
Assignee: CACHE VALLEY BANK NA
•
Filing: 1973-01-02
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Granted: 1974-03-12
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Expires: 1993-01-02
Abstract
Abstract A drag roller, especially for grading or levelling ski pistes, with a roller body rotatably supported upon an axle. The axle is composed of a number of partial axle components which are coupled with one another by joints having 1* of freedom of movement, the pivot axes of which extend approximately parallel to the direction of travel. At least a number of the partial axle components each carry a respective roller body. The end face of one of two neighboring roller bodies is formed by a substantially ball or spherical head which merges with the outer surface of such roller body, and this ball head engages with the neighboring roller body which is constructed at its neighboring end face in the manner of a ball socket.
Inventors
- 👤 M Buhler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:09
CPC Classifications
E; E01; E01H; E01H4/00; E01H4/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
132 words
A drag roll arrangement especially for levelling ski pistes, comprising an axle consisting of a number of partial axle components, a respective joint having a single degree of freedom of movement for interconnecting neighboring partial axle components with one another, each said joint having a pivot axis which extends substantially parallel to the direction of travel of the drag roll arrangement, and at least a portion of the partial axle components each carrying a roller body, the end face of one of two neighboring roller bodies being formed by a substantially ball-like head which merges with the outer surface thereof, and the neighboring roller body being provided at its end face confronting the end face of the other roller body with a ball socket, said ball-like head engaging with said ball socket.
Claim 2
Dependent Claim
132 words
A drag roll arrangement especially for levelling ski pistes, comprising an axle consisting of a number of partial axle components, a respective joint having a single degree of freedom of movement for interconnecting neighboring partial axle components with one another, each said joint having a pivot axis which extends substantially parallel to the direction of travel of the drag roll arrangement, and at least a portion of the partial axle components each carrying a roller body, the end face of one of two neighboring roller bodies being formed by a substantially ball-like head which merges with the outer surface thereof, and the neighboring roller body being provided at its end face confronting the end face of the other roller body with a ball socket, said ball-like head engaging with said ball socket.
Claim 3
Dependent Claim
15 words
The drag roller arrangement as defined in claim 1, wherein three roller bodies are provided.
Claim 4
Dependent Claim
21 words
The drag roller arrangement as defined in claim 2, wherein each of the partial axle components carry a respective roller body.
Claim 5
Dependent Claim
31 words
The drag roller arrangement as defined in claim 3, wherein a respective further free partial axle component merges at each side with the partial axle components which carry the roller bodies.
Claim 6
Dependent Claim
51 words
The drag roll arrangement as defined in claim 1, wherein the outermost partial axle components are provided with means for mounting each of the same to be axially displaceable at a drag frame and pivotably about an axis extending sUbstantially parallel to the direction of travel of the drag roll arrangement.
Claim 7
Dependent Claim
43 words
The drag roll arrangement as defined in claim 5, wherein the drag frame possesses a substantially rectangular configuration and carries a coupling member which is pivotably mounted about an axis extending approximately parallel to the direction of travel of the drag roll arrangement.
Claim 8
Dependent Claim
41 words
The drag roll arrangement as defined in claim 1, wherein the partial axle components incorporate locking means in order to block the associated joints in a predetermined position, and means for actuating the locking means externally of the associated roller body.
Claim 9
Dependent Claim
59 words
The drag roll arrangement as defined in claim 7, wherein the partial axle components are at least partially hollow, and the locking means incorporates a locking bolt displaceably guided in one of two neighboring hollow partial axle components, and said actuating means comprises a fluid-actuated cylinder containing a piston therein, said piston being operatively connected with the locking bolt.
References Cited (Backward Citations)
US150629A
Cited
US151332A
Cited
US1056851A
Cited
US1989573A
Cited
US2024184A
Cited
US2739517A
Cited
US3119313A
Cited
US3233530A
Cited
US3662657A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-11 | 1977-09-10 | 1978-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-11 | 1981-09-10 | 1982-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-11 | 1985-09-10 | 1986-03-12 | $7700.00 | Window Closed / Lapsed |