US3752259A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sound reducing device for use with bar fed machinery
Assignee: Wright Engineering Co Ltd
•
Filing: 1972-01-12
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Granted: 1973-08-14
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Expires: 1992-01-12
Abstract
Abstract A device for reducing sound created by feeding of metallic bar material to a machine working the bar, the device comprising a substantially rigid tube of plastics material for positioning around the bar and within the bar carrier tube of said machine, in which said tube has a plurality of longitudinal ribs on its curved surface so that in use a plurality of chambers are formed between said plastics tube and the bar feed or carrier tube. In use the chambers may be left empty or filled with acoustic insulating material.
Inventors
- 👤 D Wright
- 👤 J Boote
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:50
CPC Classifications
B; B23; B23B; B23B13/00; B23B13/08; Y; Y10; Y10T; Y10T82/00; Y10T82/25; Y10T82/2593; Y10T82/2595
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
77 words
A device for reducing sound created by feeding of metallic bar material to a machine working the bar, the device comprising a substantially rigid tube of plastics material for positioning around the bar and within the bar carrier tube of said machine, in which said tube has a plurality of longitudinal ribs on its curved surface so that in use a plurality of chambers are formed between said plastics tube and the bar feed or carrier tube.
Claim 2
Independent Claim
77 words
A device for reducing sound created by feeding of metallic bar material to a machine working the bar, the device comprising a substantially rigid tube of plastics material for positioning around the bar and within the bar carrier tube of said machine, in which said tube has a plurality of longitudinal ribs on its curved surface so that in use a plurality of chambers are formed between said plastics tube and the bar feed or carrier tube.
Claim 3
Dependent Claim
15 words
A device as claimed in claim 1 wherein the plastics tube is made of nylon.
Claim 4
Dependent Claim
27 words
A device as claimed in claim 1 wherein the plastics tube is formed by a plurality of interconnected tubular sections each section being made by injection moulding.
Claim 5
Dependent Claim
25 words
A device as claimed in claim 3 wherein adjacent end portions of the sections are formed with corresponding projections and recesses for interconnecting said sections.
Claim 6
Dependent Claim
28 words
A device as claimed in claim 3 wherein spacer rings having an external diameter equal to that of said ribs are formed at intervals along the tube sections.
Claim 7
Dependent Claim
19 words
A dEvice as claimed in claim 3 wherein each section is formed by two pieces of semi-circular cross section.
Claim 8
Dependent Claim
24 words
A device as claimed in claim 6 wherein the two pieces of each section are joinable by co-operating snap pins and recesses provided thereon.
Claim 9
Dependent Claim
107 words
In a bar feeding device, an outer tube, means for reducing sound created by feeding metallic bar material through said tube comprising, a substantially rigid inner tube of plastic material of an internal diameter to accommodate the feeding of said metallic bar, and of an outer diameter spaced from the inside diameter of said outer tube, and a plurality of longitudinal ribs of the same plastics material formed integrally on the outer periphery of said inner tube and being of such height as to engage the inside periphery of said outer tube thereby to form a plurality of chambers between said tubes thereby to reduce said sound.
Claim 10
Dependent Claim
107 words
In a bar feeding device, an outer tube, means for reducing sound created by feeding metallic bar material through said tube comprising, a substantially rigid inner tube of plastic material of an internal diameter to accommodate the feeding of said metallic bar, and of an outer diameter spaced from the inside diameter of said outer tube, and a plurality of longitudinal ribs of the same plastics material formed integrally on the outer periphery of said inner tube and being of such height as to engage the inside periphery of said outer tube thereby to form a plurality of chambers between said tubes thereby to reduce said sound.
Claim 11
Dependent Claim
57 words
The device specified in claim 11, and a plurality of spacer rings of the same plastics material as said inner tube formed integrally with said inner tube and being of such diameter as to contact the inner periphery of said outer tube and being spaced at intervals along the inner tube thereby to further divide said chambers.
Claim 12
Dependent Claim
30 words
A bar carrier feed tube as claimed in claim 9 wherein the chambers are filled with acoustic insulating material. chippings, asbestos string, expanded polystyrene or granular material such as sand.
References Cited (Backward Citations)
GB377020A
Cited
US2534811A
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US2815252A
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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) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |