US3633980A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Support bearing
Assignee: Ametek Inc
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Filing: 1970-04-15
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Granted: 1972-01-11
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Expires: 1990-04-15
Abstract
Abstract A bearing for supporting a telescoping helical spiral tube device against lateral movement comprises a plurality of rollers adapted to engage the outer periphery of the tube. The rollers are interconnected with brake means main become operative to prevent radial movement of any roller except when all of the rollers are equally displaced from the axis of the tube. Thus, the bearing allows expansion and contraction of the tube as it is extended and withdrawn, but positively prevents lateral displacement of the tube.
Inventors
- 👤 James E Hunt
- 👤 Rene L Guerster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 00:33
CPC Classifications
F; F16; F16C; F16C29/00; F16C29/002; F16C19/00; F16C27/00; F16C31/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
167 words
A support bearing for preventing lateral displacement of an expansible member with respect to an axis while allowing radial expansion and contraction about said axis comprising: a frame having a central opening, a plurality of rack means mounted on said frame about said opening, a sprag pivotally mounted on each rack means, a member fixedly secured to the frame adjacent each sprag, connecting means pivoted to each sprag and connected to the next adjacent rack means, a gear adjacent each rack means in engagement therewith and mounted for rotation about a fixed axis, and a plurality of levers each having one end connected to a gear for the rotation thereof and the other end attached to engage and follow the outer periphery of the expansible member, relative movement of adjacent rack means due to lateral displacement of the expansible member causing a sprag to pivot and engage its adjacent member to arrest the movement of the rack to which its connected and the associated gear and lever.
Claim 2
Dependent Claim
167 words
A support bearing for preventing lateral displacement of an expansible member with respect to an axis while allowing radial expansion and contraction about said axis comprising: a frame having a central opening, a plurality of rack means mounted on said frame about said opening, a sprag pivotally mounted on each rack means, a member fixedly secured to the frame adjacent each sprag, connecting means pivoted to each sprag and connected to the next adjacent rack means, a gear adjacent each rack means in engagement therewith and mounted for rotation about a fixed axis, and a plurality of levers each having one end connected to a gear for the rotation thereof and the other end attached to engage and follow the outer periphery of the expansible member, relative movement of adjacent rack means due to lateral displacement of the expansible member causing a sprag to pivot and engage its adjacent member to arrest the movement of the rack to which its connected and the associated gear and lever.
Claim 3
Dependent Claim
24 words
A support bearing according to claim 1 having resilient means to bias each of said plurality of levers into engagement with said expansible members.
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) | 1975-01-10 | 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 |