Patent US3918696A successfully refreshed from Google Patents.
US3918696A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite stock tube
Assignee: Acme Cleveland Corp
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Filing: 1974-12-09
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Granted: 1975-11-11
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Expires: 1994-12-09
Abstract
Abstract To comply with U.S. Government requirements of a quiet machine tool with a dBA rating less than 90, the noise produced by a hexagonal piece of bar stock rotating inside a stock tube is reduced to well below this level by providing a composite stock tube. An outer cylindrical metal tube houses a plurality of axially aligned tubular elements, the lengths of which are sufficiently short and all physical dimensions and characteristics of which are such as will limit to a frequency range greater than 2,000 Hz. (preferably greater than 16,000 Hz.), the noise vibrations caused by the rotating bar and which vibrations, in the absence of this invention, could be transmitted to the space surrounding the stock tube at a level above 80 dBA. The tubular segments are supported within the outer tube by support means comprising elastic rings which radially separate the tubular segments from the outer tube and preferably axially separate adjacent tubular segments.
Inventors
- 👤 Chester E Jameson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:35
CPC Classifications
B; B23; B23B; B23B13/00; B23B13/08; Y; Y10; Y10T; Y10T82/00; Y10T82/25; Y10T82/2585
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
139 words
A composite stock tube for supporting bar stock of square, round, hexagonal or other cross-sectional shape to be rotated by and processed in a single or multiple spindle machine tool, said composite stock tube comprising, in combination; an outer support having an inside surface in a generally tubular configuration, a bar stock liner adapted to accommodate the rotatable bar stock and including a plurality of tubular segments each with a generally cylindrical inner surface, means to support said segments in substantially axial alignment within said outer support and with a majority of the length of each segment spaced from said inside surface of said outer support. and means including said individual tubulaR segments having small enough physical dimensions to limit the noise vibrations to a frequency range greater than 2,000 Hz. upon a bar rotating within said tubular segments.
Claim 2
Dependent Claim
139 words
A composite stock tube for supporting bar stock of square, round, hexagonal or other cross-sectional shape to be rotated by and processed in a single or multiple spindle machine tool, said composite stock tube comprising, in combination; an outer support having an inside surface in a generally tubular configuration, a bar stock liner adapted to accommodate the rotatable bar stock and including a plurality of tubular segments each with a generally cylindrical inner surface, means to support said segments in substantially axial alignment within said outer support and with a majority of the length of each segment spaced from said inside surface of said outer support. and means including said individual tubulaR segments having small enough physical dimensions to limit the noise vibrations to a frequency range greater than 2,000 Hz. upon a bar rotating within said tubular segments.
Claim 3
Dependent Claim
21 words
A composite stock tube as set forth in claim 1, wherein said outer support is a substantially solid walled cylindrical tube.
Claim 4
Dependent Claim
23 words
A composite stock tube as set forth in claim 1, wherein each of said tubular segments is a substantially solid walled cylindrical tube.
Claim 5
Dependent Claim
30 words
A composite stock tube as set forth in claim 1, wherein said support means supports said tubular segments to present substantially a smooth continuous solid inner surface of said liner.
Claim 6
Dependent Claim
39 words
A composite stock tube as set forth in claim 1, wherein said tubular segments are small enough in physical length to limit the noise vibrations to a frequency range in excess of 16,000 Hz. upon a bar rotating therewithin.
Claim 7
Dependent Claim
23 words
A composite stock tube as set forth in claim 1, wherein said support means includes means to maintain said tubular segments axially spaced.
Claim 8
Dependent Claim
25 words
A composite stock tube as set forth in claim 1, wherein said support means includes a helical wrap of resilient material around said tubular segments.
Claim 9
Dependent Claim
23 words
A composite stock tube as set forth in claim 1, wherein said support means supports said tubular segments substantially at the ends thereof.
Claim 10
Dependent Claim
20 words
A composite stock tube as set forth in claim 8, including said support means having elasticity in a radial direction.
Claim 11
Dependent Claim
37 words
A composite stock tube as set forth in claim 8, wherein said support means includes elastic rings of rubber like material encircling the ends of said tubular segments and engaging said inside surface of said outer support.
Claim 12
Dependent Claim
33 words
A composite stock tube as set forth in claim 10, wherein said tubular segments have portions of reduced outside diameter at the ends thereof, and said elastic rings engage said reduced diameter portions.
Claim 13
Dependent Claim
32 words
A composite stock tube as set forth in claim 10, wherein said elastic rings have a reduced inside diameter portion near the longitudinal center thereof to axially separate two adjacent tubular segments.
Claim 14
Dependent Claim
26 words
A composite stock tube as set forth in claim 1, wherein said support means supports said tubular segments substantially at nodal points of vibration in bending.
Claim 15
Dependent Claim
29 words
A composite stock tube as set forth in claim 13, wherein said support means includes means of low transmissibility of vibrations relative to the material of said tubular segments.
Claim 16
Dependent Claim
30 words
A composite stock tube as set forth in claim 1, wherein said support means includes means to support said tubular segments substantially at the antinodal points of vibration in bending.
Claim 17
Dependent Claim
24 words
A composite stock tube as set forth in claim 15, wherein said support means at said antinodal points includes means to damp the vibrations.
References Cited (Backward Citations)
US1786876A
Cited
US1891290A
Cited
US1935999A
Cited
US2534811A
Cited
US2700631A
Cited
US2933173A
Cited
US3420553A
Cited
US3749132A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-10 | 1979-05-12 | 1979-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-10 | 1983-05-12 | 1983-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-10 | 1987-05-12 | 1987-11-11 | $7700.00 | Window Closed / Lapsed |