US4630328A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-compensating support element and end closure therefor
Assignee: Kadant Web Systems Inc
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Filing: 1985-11-27
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Granted: 1986-12-23
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Expires: 2005-11-27
Abstract
Abstract For use in a doctor blade holder or the like, a self-compensating support element consisting of a hollow elongated flexible tube filled, except for the end regions thereof, with an incompressible liquid. Pliable inserts are received in the tube end regions, and tubular metal sleeves are swaged onto the tube end regions and the inserts received therein. The tube end regions are thus tightly clamped between the inserts and the thus swaged sleeves to seal against the escape of liquid from the tube ends.
Inventors
- 👤 Donald W. Croteau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:02
CPC Classifications
D; D21; D21G; D21G3/00; D21G3/005; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49908; Y10T29/49925; Y10T29/49927; Y10T29/49929
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
69 words
A self-compensating support element for use in a doctor blade holder or the like, comprising: a hollow elongated flexible tube; an incompressible liquid filling said tube except for the end regions thereof; pliable inserts received in said end regions; and tubular metal sleeves surrounding said end regions, said tube being tightly clamped between said sleeves and said inserts to seal against the escape of said liquid from said tube.
Claim 2
Dependent Claim
69 words
A self-compensating support element for use in a doctor blade holder or the like, comprising: a hollow elongated flexible tube; an incompressible liquid filling said tube except for the end regions thereof; pliable inserts received in said end regions; and tubular metal sleeves surrounding said end regions, said tube being tightly clamped between said sleeves and said inserts to seal against the escape of said liquid from said tube.
Claim 3
Dependent Claim
19 words
The support element of claim 1 wherein said metal sleeves are swaged onto the end regions of said tube.
Claim 4
Dependent Claim
14 words
The support element of claim 1 wherein said end regions have unequal wall thicknesses.
Claim 5
Dependent Claim
50 words
The support element of claim 3 wherein said metal sleeves are swaged onto the end regions of said tube, and said inserts are compressed and expanded longitudinally as a result of said sleeves being swaged, thereby avoiding any reduction in the wall thickness of said tube at said end regions.
Claim 6
Dependent Claim
27 words
The support element of claim 3 wherein said sleeves are swaged inwardly at a location adjacent to the area of maximum wall thickness of said end regions.
Claim 7
Dependent Claim
38 words
The support element in accordance with any one of the preceding claims wherein said tube is provided with external ribs which extend longitudinally and continuously along the length thereof except at the end regions surrounded by said sleeves.
Claim 8
Dependent Claim
32 words
The support element of claim 1 wherein said sleeves have end portions with engagement means associated therewith for coupling with pulling devices employed to install said element in the doctor blade holder.
Claim 9
Dependent Claim
26 words
The support element of claim 7 wherein said engagement means comprises holes extending through the outer end portions of said sleeves, said inserts and said tube.
Claim 10
Dependent Claim
20 words
The support element of claim 1 wherein said inserts protrude into said tube beyond the inner ends of said sleeves.
Claim 11
Dependent Claim
107 words
A self-compensating support element for use in a doctor blade holder or the like, comprising: a hollow flexible tube provided with external ribs which extend continuously and longitudinally along said tube except at the end regions thereof, at least said end regions having bottom, end and top wall portions of unequal thickness; an incompressible liquid filling said tube except for the end regions thereof; pliable inserts received in said end regions; and tubular metal sleeves swaged onto the end regions of said tube and said inserts, said tube being tightly clamped between said sleeves and said inserts to seal against the escape of liquid from said tube.
Claim 12
Dependent Claim
107 words
A self-compensating support element for use in a doctor blade holder or the like, comprising: a hollow flexible tube provided with external ribs which extend continuously and longitudinally along said tube except at the end regions thereof, at least said end regions having bottom, end and top wall portions of unequal thickness; an incompressible liquid filling said tube except for the end regions thereof; pliable inserts received in said end regions; and tubular metal sleeves swaged onto the end regions of said tube and said inserts, said tube being tightly clamped between said sleeves and said inserts to seal against the escape of liquid from said tube.
Claim 13
Dependent Claim
68 words
An end closure for an elongated flexible support tube of the type adapted to be filled with an incompressible liquid, comprising: a pliable insert adapted to be received in the end of said tube, and a tubular metal sleeve surrounding and swaged onto said tube end, said tube being tightly clamped between said sleeve and said insert to seal against the escape of said liquid from said tube.
Claim 14
Dependent Claim
68 words
An end closure for an elongated flexible support tube of the type adapted to be filled with an incompressible liquid, comprising: a pliable insert adapted to be received in the end of said tube, and a tubular metal sleeve surrounding and swaged onto said tube end, said tube being tightly clamped between said sleeve and said insert to seal against the escape of said liquid from said tube.
Claim 15
Dependent Claim
25 words
The end closure of claim 10 wherein an inner end of said insert protrudes inwardly into said tube beyond the inner end of said sleeve.
Claim 16
Dependent Claim
35 words
The end closure of claim 11 wherein an outer end of said insert protrudes outwardly beyond the end of said tube, and wherein said sleeve is swaged onto the protruding outer end of said insert.
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) | 1989-12-22 | 1990-06-23 | 1990-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-22 | 1994-06-23 | 1994-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-22 | 1998-06-23 | 1998-12-23 | $7700.00 | Window Closed / Lapsed |