US3690601A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pneumatic deicer periphery bleeder
Assignee: Individual
•
Filing: 1970-09-23
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Granted: 1972-09-12
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Expires: 1990-09-23
Abstract
Abstract A pneumatic deicer having passages for inflation and deflation to break up ice accumulations on the surface with a bleeder channel in the trailing edge containing a plurality of stiff fibers extending from one face of the channel toward the other to hold the channel open for maximum flow of the inflating medium out of the passages and thereby provide the rapid deflation needed for effective breakage of the ice forming on the surface.
Inventors
- 👤 Lowell W Roemke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:23
CPC Classifications
B; B64; B64D; B64D15/00; B64D15/16; B64D15/166
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
189 words
An inflatable deicer boot for mounting on an airfoil comprising a series of passages extending longitudinally of said airfoil which can be selectively inflated and deflated to break up a formation of ice on said airfoil, said boot having a longitudinally extending trailing edge, a bleeder channel in said trailing edge, a plurality of closely spaced openings in said channel for communication with at least one of said passages over substantially the length of said boot for flow of the inflating medium away from said passages and longitudinally of said boot during deflation of said boot, said boot having an inner ply adapted for attachment to said airfoil and an outer ply of distensible material overlying said inner ply and said passages, a reinforcing member extending from said trailing edge over said channel and into the edge of said outer ply, and said channel having opposing faces held apart by a plurality of closely spaced elongated elements extending from one face of said channel towards the other face to hold the channel open for rapid deflation and collapse of said passages to break up ice forming on said airfoil.
Claim 2
Dependent Claim
189 words
An inflatable deicer boot for mounting on an airfoil comprising a series of passages extending longitudinally of said airfoil which can be selectively inflated and deflated to break up a formation of ice on said airfoil, said boot having a longitudinally extending trailing edge, a bleeder channel in said trailing edge, a plurality of closely spaced openings in said channel for communication with at least one of said passages over substantially the length of said boot for flow of the inflating medium away from said passages and longitudinally of said boot during deflation of said boot, said boot having an inner ply adapted for attachment to said airfoil and an outer ply of distensible material overlying said inner ply and said passages, a reinforcing member extending from said trailing edge over said channel and into the edge of said outer ply, and said channel having opposing faces held apart by a plurality of closely spaced elongated elements extending from one face of said channel towards the other face to hold the channel open for rapid deflation and collapse of said passages to break up ice forming on said airfoil.
Claim 3
Dependent Claim
26 words
An inflatable deicer boot according to claim 1 wherein said closely spaced elements are stiff fibers projecting outwardly from a fabric strip mounted in said channel.
Claim 4
Dependent Claim
84 words
An inflatable deicer boot according to claim 2 wherein said boot has an opening in the face thereof, said reinforcing member extending around and on both sides of said channel in the area of said opening and said channel extends along the trailing edge of said boot adjacent said opening to provide for continuous flow along said trailing edge between separated areas of said boot for rapid deflation of all areas and collapse of said passages to break up ice forming on said airfoil.
Claim 5
Dependent Claim
24 words
An inflatable deicer boot according to claim 2 wherein said boot has two trailing edges with bleeder channels in both of said trailing edges.
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) | 1975-09-12 | 1976-03-13 | 1976-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-12 | 1980-03-13 | 1980-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-12 | 1984-03-13 | 1984-09-12 | $7700.00 | Window Closed / Lapsed |