Patent US3348069A successfully refreshed from Google Patents.
US3604050A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Long retracting soot blower with shifting roller supports
Assignee: Babcock and Wilcox Co
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Filing: 1968-12-03
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Granted: 1971-09-14
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Expires: 1988-12-03
Abstract
Abstract Cylindrical rollers for supporting a lance tube of a soot blower are carried in a frame which is limitedly shiftable longitudinally when the lance tube moves axially. The rollers are journaled on axes tangent to a helix concentric with the lance tube and are carried by subframes which can be turned about radial axes to adjust their journal axes to helices of varying pitch.
Inventors
- 👤 John E Nelson
- 👤 John R Saltz
- 👤 Robert E Chappell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:19
CPC Classifications
F; F28; F28G; F28G15/00; F28G15/02
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
97 words
In a long retracting soot blower construction, in combination with a lance tube, means for simultaneously axially moving and rotating the same whereby it may be extended into and retracted from a boiler setting or the like in helical paths, and means for shifting the lance tube longitudinally without rotating the same in order to change the helical path of travel of the lance tube, the novelty which comprises a front antifriction support for the lance tube limitedly shiftable longitudinally with and in response to such axial movement of the lance tube which occurs without rotation thereof.
Claim 2
Dependent Claim
97 words
In a long retracting soot blower construction, in combination with a lance tube, means for simultaneously axially moving and rotating the same whereby it may be extended into and retracted from a boiler setting or the like in helical paths, and means for shifting the lance tube longitudinally without rotating the same in order to change the helical path of travel of the lance tube, the novelty which comprises a front antifriction support for the lance tube limitedly shiftable longitudinally with and in response to such axial movement of the lance tube which occurs without rotation thereof.
Claim 3
Dependent Claim
52 words
Means as defined in claim 1 including a pair of cylindrical rollers incorporated in said antifriction support and carrying the lance tube, said rollers being mounted upon axes substantially perpendicular to a radius and to the pitch line of a helix corresponding to a path of helical movement of the lance tube.
Claim 4
Dependent Claim
94 words
In a long retracting soot blower construction, in combination with a lance tube rotatable and axially movable in a helical path, the novelty which comprises a cylindrical antifriction roller underengaging and supporting said lance tube and rotatable upon an axis perpendicular to the helical path traced by a point on the lance tube, supporting means for said roller, and means for securing the supporting means in any of a plurality of angular positions concentric with an axis of rotation which is perpendicular to the axis of the roller and radial to the lance tube.
Claim 5
Dependent Claim
94 words
In a long retracting soot blower construction, in combination with a lance tube rotatable and axially movable in a helical path, the novelty which comprises a cylindrical antifriction roller underengaging and supporting said lance tube and rotatable upon an axis perpendicular to the helical path traced by a point on the lance tube, supporting means for said roller, and means for securing the supporting means in any of a plurality of angular positions concentric with an axis of rotation which is perpendicular to the axis of the roller and radial to the lance tube.
Claim 6
Dependent Claim
128 words
In a long retracting soot blower construction, in combination with a lance tube rotatable and axially movable in a helical path, the novelty which comprises a plurality of cylindrical antifriction rollers underengaging and supporting said lance tube and rotatable upon axes perpendicular to the helical path traced by a point on the lance tube, supporting means for said rollers comprising a carrier having portions spacedly underlying the lance tube and lying in planes parallel to lines tangent to the lance tube, a journaling support for each of said rollers, and means for securing each of said supports to one of said portions of the carrier in any of a plurality of angularly rotated positions about an axis radial to the lance tube and perpendicular to the roller axis.
Claim 7
Dependent Claim
128 words
In a long retracting soot blower construction, in combination with a lance tube rotatable and axially movable in a helical path, the novelty which comprises a plurality of cylindrical antifriction rollers underengaging and supporting said lance tube and rotatable upon axes perpendicular to the helical path traced by a point on the lance tube, supporting means for said rollers comprising a carrier having portions spacedly underlying the lance tube and lying in planes parallel to lines tangent to the lance tube, a journaling support for each of said rollers, and means for securing each of said supports to one of said portions of the carrier in any of a plurality of angularly rotated positions about an axis radial to the lance tube and perpendicular to the roller axis.
Claim 8
Dependent Claim
79 words
In a long retracting soot blower construction, in combination with a lance tube rotatable and axially movable in a helical path, the novelty which comprises a plurality of cylindrical antifriction rollers underengaging and supporting said lance tube and rotatable upon axes perpendicular to the helical path traced by a point on the lance tube, a carrier for said rollers having portions spacedly underlying the lance tube, and means supporting said carrier for limited movement lengthwise of the lance tube.
Claim 9
Dependent Claim
79 words
In a long retracting soot blower construction, in combination with a lance tube rotatable and axially movable in a helical path, the novelty which comprises a plurality of cylindrical antifriction rollers underengaging and supporting said lance tube and rotatable upon axes perpendicular to the helical path traced by a point on the lance tube, a carrier for said rollers having portions spacedly underlying the lance tube, and means supporting said carrier for limited movement lengthwise of the lance tube.
Claim 10
Dependent Claim
34 words
A construction as defined in claim 5 wherein said means for supporting the carrier includes means pivotally mounting the same for swinging movement about an axis spaced above and transverse to the lance tube.
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) | 1974-09-13 | 1975-03-15 | 1975-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-13 | 1979-03-15 | 1979-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-13 | 1983-03-15 | 1983-09-14 | $7700.00 | Window Closed / Lapsed |