US3633711A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thread brake
Assignee: Sulzer AG
•
Filing: 1969-10-21
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Granted: 1972-01-11
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Expires: 1989-10-21
Abstract
Abstract A thread brake includes a horizontal abrasion-resistant stripshaped flexible overlay on a resilient backing, pivotally supported about a horizontal axis at the half height of the strip, and a plurality of cylindrically curved braking elements supported at the ends of levers on a common shaft about which the levers are rotated to engage successively against the overlay. In another embodiment the strip is rocked about an axis displaced from itself into engagement with stationary braking elements.
Inventors
- 👤 Erwin Pfarrwaller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:11
CPC Classifications
D; D03; D03D; D03D47/00; B; B65; B65H; B65H59/00; B65H59/10; B65H59/20; B65H59/22; B65H2701/00; B65H2701/30; B65H2701/31
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
66 words
A thread brake comprising two braking elements, at least one of which is flexible, and means to move said elements toward and away from each other, said flexible element including an elastic underlay and a flexible laminar overlay thereon elastically deformable upon engagement against the other of said elements, said overlay having a wear-resistant material on the side thereof presented to the other of said elements.
Claim 2
Dependent Claim
66 words
A thread brake comprising two braking elements, at least one of which is flexible, and means to move said elements toward and away from each other, said flexible element including an elastic underlay and a flexible laminar overlay thereon elastically deformable upon engagement against the other of said elements, said overlay having a wear-resistant material on the side thereof presented to the other of said elements.
Claim 3
Dependent Claim
16 words
A thread brake according to claim 1 wherein said underlay is made of a foamed material.
Claim 4
Dependent Claim
14 words
A thread brake according to claim 1 wherein said overlay comprises a flexible foil.
Claim 5
Dependent Claim
25 words
A thread brake according to claim 1 wherein said overlay comprises a sheet of hardened steel having a thickness between substantially 0.02 and 0.1 mm.
Claim 6
Dependent Claim
29 words
A thread brake according to claim 1 including a rotatable cam, and means coupling said cam to said means to move said elements toward and away from each other.
Claim 7
Dependent Claim
32 words
A thread brake according to claim 1 including an electromagnet having a movable armature, and means coupling said armature to said means to move Said elements toward and away from each other.
Claim 8
Dependent Claim
50 words
A thread brake according to claim 1 wherein at least one of said elements includes a plurality of bodies disposed one behind the other along the path of motion of the thread through the brake, and means to adjustably fix the positions of said bodies with respect to each other.
Claim 9
Dependent Claim
22 words
A thread brake according to claim 1 including a plurality of guide elements fixed with respect to one of said braking elements.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-10 | 1975-07-12 | 1976-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-10 | 1979-07-12 | 1980-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-10 | 1983-07-12 | 1984-01-11 | $7700.00 | Window Closed / Lapsed |