US3690601A - Pneumatic deicer periphery bleeder - Google Patents

Pneumatic deicer periphery bleeder Download PDF

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Publication number
US3690601A
US3690601A US74690A US3690601DA US3690601A US 3690601 A US3690601 A US 3690601A US 74690 A US74690 A US 74690A US 3690601D A US3690601D A US 3690601DA US 3690601 A US3690601 A US 3690601A
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United States
Prior art keywords
boot
channel
passages
airfoil
trailing edge
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Expired - Lifetime
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US74690A
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English (en)
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Lowell W Roemke
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Individual
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Individual
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
    • B64D15/00—De-icing or preventing icing on exterior surfaces of aircraft
    • B64D15/16—De-icing or preventing icing on exterior surfaces of aircraft by mechanical means, e.g. pulsating mats or shoes attached to, or built into, surface
    • B64D15/166—De-icing or preventing icing on exterior surfaces of aircraft by mechanical means, e.g. pulsating mats or shoes attached to, or built into, surface using pneumatic boots

Definitions

  • the passages are deflated by releasing the inflating medium from the boot and the deicer is maintained in the deflated condition while a layer of ice is built up on the surface.
  • the deicer is then inflated again to shatter the layer of ice whereupon the broken ice particles are blown off by the airstream across the airfoil.
  • the pneumatic deicer of this invention provides a boot which is constructed to greatly reduce. the time required for inflation and deflation. This is accomplished byproviding for rapid deflation of the boot through a special bleeder channel located along the trailing edge of the deicer.
  • the bleeder channel contains a strip of material having a large number of stiff fibers extending from the strip to an opposing face of the bleeder channel which holds the channel open for maximum flow of the inflating medium out of the passages in the deicer boot. It has been found that the use of this construction permits placement of the air inlet port in many different positions and has permitted greater distances between the air inlet port and the ends of the deicers as compared with previous designs.
  • This construction is superior to the alternative of using an outer fabric of greater elasticity which increases the weight and cost of the deicer and detracts from its appearance and aerodynamic efficiency. It is also superior to the other expedient of adding more air outlets which increases the cost of the boot as well as the installation and maintenance.
  • FIG. 1 A laminated, inflatable deicer boot 10 is shownin FIG. 1 in the condition prior to installation on an airfoil with the leading edge of the airfoil to be covered .bythe leading edge portion of the boot indicated by'the dotdash line L-L. Trailing edges 11 and 12 of the boot are parallel to the leading edge portion LL and extend to the rear of the airfoil on the upper and under side thereoffAs shown in FIGS. 1 and 2, the bottom ply 13 which may be of fabric coated. with rubber-or other resilient rubberlike material, extends under the deicer boot 10 and is fastened to the airfoil by suitable means well known in the art and not shown in this application.
  • Atop ply 14 which may be of fabric coated with rubber or other resilient rubberlike material overlies the bottom ply l3 and is covered by a sheet member 15 of resilient rubberlike materialsuch as neoprene which covers the deicer boot on the external airflow side.
  • a sheet member 15 of resilient rubberlike materialsuch as neoprene which covers the deicer boot on the external airflow side.
  • an intermediate member 16 which may be of fiber glass or other reinforcing material.
  • the bottom ply 13, top ply 14 and intermediate member 16 are sewed together by a series of stitches 17 so that a series of parallel passages 18 are formed lengthwise along the boot as shown in FIG 1 by dotted lines.
  • a peripheral bleeder channel 19 is located in the trailing edge 11 of the deicer boot and is in communication with the passages 18 in the space between the top ply 14 and intermediate member 16.
  • Channel 19 extends along the trailing edge 11 in a longitudinal direction from one end of the deicer boot 10 to the other end in parallel relationship to the passages 18. Where there is an access opening 22 in the deicer boot 10, bleeder channel 19 extends along the trailing edge 11 past the opening to provide a continuous channel from one end of the deicer boot to the other. This construction is shown in detail in FIG. 3.
  • the bleeder channel 19 contains a fabric strip 23 having a plurality of closely spaced elements such as stiff fibers 24 which project from the upper surface of the channel downwardly to the opposing lower surface of the channel to provide interstices through which the inflating medium can flow.
  • a fabric reinforcing member 25 extends between the sheet member 15 and top ply 14 over the strip of fabric 23 and along the side of the channel 19 and then into the trailing edge 11 where it is embedded in the resilient rubberlike material of the boot 10. As shown in FIG.
  • the fabric reinforcing member 25 extends along the top and both sides of the bleeder channel 19 andthen is embedded in and adhered to the resilient rubberlike material of the deicer boot on both sides of the channel where there are no passages 18 as in the area of the access opening 22.
  • a second channel like bleeder channel 19 in the trailing edge 11 may also be built into the trailing edge 12 to provide improved flow of the inflating medium out of the passages 18.
  • Air inlet and outlet opening 26 may be located in a convenient spot for maintenance and installation and is located as shown in FIG. 1 in a position connecting with one of the passages 18 which in turn is connected with the bleeder channel 19.
  • an inflating means such as air is injected through the air inlet opening 26 causing the top ply 14 and sheet member 15 to distend outwardly between the stitches 17 as shown in FIG. 4.
  • This distension shatters the ice layer which may have formed on the sheet member 15 and the airflow past the deicer boot 10 blows the ice particles away from this surface.
  • manifolds are not necessary since the inflating medium may flow between the passages 18 around the stitches 17. This is what is known as a sewn deicer construction.
  • Rapid deflation of the deicer boot is then obtained by opening the air inlet and outlet opening 26 whereupon the air in the passages 18 will be urged to the trailing edges 11 and 12 where'it will be taken through the channel 19 to the air inlet and outlet opening.
  • the upright fibers 24 located in the bleeder channel 19 prevent collapse of the channel and rapid flow of the air out of the deicer boot to provide the maximum efficiency of operation.
  • the parts which are not sewn together are cemented together and may be vulcanized to provide a unitary structure which will withstand the severe operating conditions found on the airfoil of an aircraft and especially on the leading edge where the deicer boot is mounted.
  • 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
  • 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 exte ids along the traii i edge of said boot ad acent sai opening to provr 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.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Diaphragms And Bellows (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
US74690A 1970-09-23 1970-09-23 Pneumatic deicer periphery bleeder Expired - Lifetime US3690601A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US7469070A 1970-09-23 1970-09-23

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US3690601A true US3690601A (en) 1972-09-12

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Application Number Title Priority Date Filing Date
US74690A Expired - Lifetime US3690601A (en) 1970-09-23 1970-09-23 Pneumatic deicer periphery bleeder

Country Status (7)

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US (1) US3690601A (cs)
CA (1) CA934735A (cs)
DE (1) DE2146767A1 (cs)
FR (1) FR2107884B1 (cs)
GB (1) GB1331698A (cs)
IT (1) IT939856B (cs)
NL (1) NL7112875A (cs)

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4561613A (en) * 1983-05-09 1985-12-31 The B. F. Goodrich Company Deicer for aircraft
US4687159A (en) * 1985-02-22 1987-08-18 The B. F. Goodrich Company Pneumatic deicers with inextensible threads
US4747575A (en) * 1987-07-16 1988-05-31 The B. F. Goodrich Company De-icer
US4826108A (en) * 1987-07-16 1989-05-02 The B. F. Goodrich Company De-icer
US4836474A (en) * 1987-07-16 1989-06-06 The B. F. Goodrich Company De-icer
US5112011A (en) * 1989-12-04 1992-05-12 The B. F. Goodrich Company Pneumatic deicer for shedding thin ice
US5248116A (en) * 1992-02-07 1993-09-28 The B. F. Goodrich Company Airfoil with integral de-icer using overlapped tubes
US5337978A (en) * 1992-10-29 1994-08-16 The B.F. Goodrich Company Leading edge pneumatic deicer assembly
US5531405A (en) * 1994-08-23 1996-07-02 Dynamics Controls Corporation Method of building an expulsive blanket using composite materials and stitched attachment
US5657952A (en) * 1995-07-31 1997-08-19 Dynamic Controls Hs, Inc. Electro-expulsive de-icing apparatus and method of use
US5746027A (en) * 1996-08-27 1998-05-05 Bonerb; Timothy C. Device and method for removing ice and snow from roofs and overhangs
US5813631A (en) * 1996-02-26 1998-09-29 The B. F. Goodrich Company Pneumatic deicing system with drain valve
US6247669B1 (en) * 1996-05-06 2001-06-19 The B. F. Goodrich Company Airfoil low ice adhesion surface
US6439505B1 (en) * 2000-12-05 2002-08-27 The B. F. Goodrich Company Radome deicer
EP1655414A4 (en) * 2003-07-25 2010-03-24 Bridgestone Corp ICEBREAKER AND WATER PATH WITH ICE BREAKER
US20160214726A1 (en) * 2015-01-27 2016-07-28 Goodrich Corporation Health monitoring pneumatic deicer
US20180346134A1 (en) * 2017-05-31 2018-12-06 Safran Aero Boosters Sa Turbofan engine de-icing compressor and de-icing process
US20190185168A1 (en) * 2017-12-18 2019-06-20 Goodrich Corporation Sewn alternate inflate pneumatic de-icer
US12434846B2 (en) * 2023-03-09 2025-10-07 Goodrich Corporation Bartack stitched pneumatic deicer boots

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2507153A1 (fr) * 1981-06-03 1982-12-10 Caoutchouc Manuf Plastique Structure a chambres gonflables multiples pour degivreurs pneumatiques et applications similaires
US4516745A (en) * 1982-09-30 1985-05-14 B. F. Goodrich Company Pneumatic deicer and deicing method
FR3061144B1 (fr) * 2016-12-27 2023-10-20 Zodiac Aerosafety Systems Dispositif de degivrage de type pneumatique pour briser et retirer un depot de glace accumulee sur la surface exterieure d'un aeronef

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2421621A (en) * 1943-04-10 1947-06-03 Goodrich Co B F Ice removing covering for aircraft
US2440240A (en) * 1944-12-29 1948-04-27 Goodrich Co B F Protective covering for preventing accumulation of ice on airfoils
US2957662A (en) * 1956-02-17 1960-10-25 Goodrich Co B F Inflatable ice-removable apparatus for aircraft
US3370814A (en) * 1966-06-23 1968-02-27 Goodrich Co B F Aircraft deicing shoe

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3604666A (en) * 1969-08-25 1971-09-14 Goodrich Co B F Pneumatic deicer

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2421621A (en) * 1943-04-10 1947-06-03 Goodrich Co B F Ice removing covering for aircraft
US2440240A (en) * 1944-12-29 1948-04-27 Goodrich Co B F Protective covering for preventing accumulation of ice on airfoils
US2957662A (en) * 1956-02-17 1960-10-25 Goodrich Co B F Inflatable ice-removable apparatus for aircraft
US3370814A (en) * 1966-06-23 1968-02-27 Goodrich Co B F Aircraft deicing shoe

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4561613A (en) * 1983-05-09 1985-12-31 The B. F. Goodrich Company Deicer for aircraft
US4687159A (en) * 1985-02-22 1987-08-18 The B. F. Goodrich Company Pneumatic deicers with inextensible threads
US4747575A (en) * 1987-07-16 1988-05-31 The B. F. Goodrich Company De-icer
US4826108A (en) * 1987-07-16 1989-05-02 The B. F. Goodrich Company De-icer
US4836474A (en) * 1987-07-16 1989-06-06 The B. F. Goodrich Company De-icer
US5112011A (en) * 1989-12-04 1992-05-12 The B. F. Goodrich Company Pneumatic deicer for shedding thin ice
US5248116A (en) * 1992-02-07 1993-09-28 The B. F. Goodrich Company Airfoil with integral de-icer using overlapped tubes
US5337978A (en) * 1992-10-29 1994-08-16 The B.F. Goodrich Company Leading edge pneumatic deicer assembly
US5531405A (en) * 1994-08-23 1996-07-02 Dynamics Controls Corporation Method of building an expulsive blanket using composite materials and stitched attachment
US5657952A (en) * 1995-07-31 1997-08-19 Dynamic Controls Hs, Inc. Electro-expulsive de-icing apparatus and method of use
US5813631A (en) * 1996-02-26 1998-09-29 The B. F. Goodrich Company Pneumatic deicing system with drain valve
US6247669B1 (en) * 1996-05-06 2001-06-19 The B. F. Goodrich Company Airfoil low ice adhesion surface
US5746027A (en) * 1996-08-27 1998-05-05 Bonerb; Timothy C. Device and method for removing ice and snow from roofs and overhangs
US6439505B1 (en) * 2000-12-05 2002-08-27 The B. F. Goodrich Company Radome deicer
EP1655414A4 (en) * 2003-07-25 2010-03-24 Bridgestone Corp ICEBREAKER AND WATER PATH WITH ICE BREAKER
US20160214726A1 (en) * 2015-01-27 2016-07-28 Goodrich Corporation Health monitoring pneumatic deicer
US9598176B2 (en) * 2015-01-27 2017-03-21 Goodrich Corporation Health monitoring pneumatic deicer
US20170129622A1 (en) * 2015-01-27 2017-05-11 Goodrich Corporation Health monitoring pneumatic deicer
US9738397B2 (en) * 2015-01-27 2017-08-22 Goodrich Corporation Health monitoring pneumatic deicer
US20180346134A1 (en) * 2017-05-31 2018-12-06 Safran Aero Boosters Sa Turbofan engine de-icing compressor and de-icing process
US10773810B2 (en) * 2017-05-31 2020-09-15 Safran Aero Boosters Sa Turbofan engine de-icing compressor and de-icing process
US20190185168A1 (en) * 2017-12-18 2019-06-20 Goodrich Corporation Sewn alternate inflate pneumatic de-icer
US10780983B2 (en) * 2017-12-18 2020-09-22 Goodrich Corporation Sewn alternate inflate pneumatic de-icer
US12434846B2 (en) * 2023-03-09 2025-10-07 Goodrich Corporation Bartack stitched pneumatic deicer boots

Also Published As

Publication number Publication date
DE2146767A1 (de) 1972-03-30
IT939856B (it) 1973-02-10
GB1331698A (en) 1973-09-26
FR2107884A1 (cs) 1972-05-12
NL7112875A (cs) 1972-03-27
FR2107884B1 (cs) 1976-04-02
CA934735A (en) 1973-10-02

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