Patent US3670773A successfully refreshed from Google Patents.
US3670773A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tube
Assignee: Ametek Inc
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Filing: 1970-03-26
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Granted: 1972-06-20
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Expires: 1990-03-26
Abstract
Abstract A tube comprises a helical axially extending ribbon of spring material which has adjacent turns set to coil tightly in overlapping and telescoping engagement. The overlapped portion of the ribbon is offset inwardly to provide the tube with a constant outer diameter.
Inventors
- 👤 Rene L Guerster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:17
CPC Classifications
B; B21; B21C; B21C37/00; B21C37/06; B21C37/12; B21C37/123; F; F16; F16L; F16L9/00; F16L9/16; F16L9/165
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
87 words
A self-erecting and collapsiblE tube comprising: a helical axially extending ribbon of spring material having adjacent turns set to coil in tight overlapping and telescoping engagement, the overlapped portion of said ribbon being offset inwardly from the remainder of the ribbon to reduce the variation in the outer diameter of the tube from one end of the tube to the other end of the tube and providing a substantially constant outer diameter, said tube being self-erecting and collapsible along its axis with extensive relative movement between turns.
Claim 2
Dependent Claim
87 words
A self-erecting and collapsiblE tube comprising: a helical axially extending ribbon of spring material having adjacent turns set to coil in tight overlapping and telescoping engagement, the overlapped portion of said ribbon being offset inwardly from the remainder of the ribbon to reduce the variation in the outer diameter of the tube from one end of the tube to the other end of the tube and providing a substantially constant outer diameter, said tube being self-erecting and collapsible along its axis with extensive relative movement between turns.
Claim 3
Dependent Claim
13 words
A tube in accordance with claim 1 in which the material is steel.
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) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |