EP2049353A2 - Icing resistant reduced noise air motor exhaust - Google Patents

Icing resistant reduced noise air motor exhaust

Info

Publication number
EP2049353A2
EP2049353A2 EP07840510A EP07840510A EP2049353A2 EP 2049353 A2 EP2049353 A2 EP 2049353A2 EP 07840510 A EP07840510 A EP 07840510A EP 07840510 A EP07840510 A EP 07840510A EP 2049353 A2 EP2049353 A2 EP 2049353A2
Authority
EP
European Patent Office
Prior art keywords
exhaust
manifold
air
muffler
air motor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP07840510A
Other languages
German (de)
French (fr)
Other versions
EP2049353A4 (en
Inventor
David M. Behrens
Mark L. Bauck
Daniel P. Ross
John C. Holman
Mark T. Weinberger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Graco Minnesota Inc
Original Assignee
Graco Minnesota Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Graco Minnesota Inc filed Critical Graco Minnesota Inc
Publication of EP2049353A2 publication Critical patent/EP2049353A2/en
Publication of EP2049353A4 publication Critical patent/EP2049353A4/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
    • F01B31/00—Component parts, details, or accessories not provided for in, or of interest apart from, other groups
    • F01B31/02—De-icing means for engines having icing phenomena
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/08—Other arrangements or adaptations of exhaust conduits
    • F01N13/10—Other arrangements or adaptations of exhaust conduits of exhaust manifolds
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00

Definitions

  • the induction exhaust has an exhaust manifold and a muffler.
  • warm ambient air is drawn into the muffler. Heat from this external source is conducted through the finned manifold to melt ice that can form inside the manifold during the exhaust cycle.
  • the exhaust manifold directs the exhaust air stream into the muffler such that it creates a thin high velocity air stream creating a low pressure region on both sides of the stream due to the Bernoulli effect. This low pressure region creates a pressure differential which draws the warm external air into the exhaust system. The more external air that is drawn in, the more that icing will be reduced. This requires minimizing downstream exhaust pressure.
  • a reverberation chamber is added after the muffler exit allowing the sound waves to disperse over time while minimizing backpressure.
  • Reciprocating air motors have a short (15-50 msec.) blast of noise and the reverb chamber reduces peak levels and increases the duration of the noise.
  • the chamber also has a capacitance function which minimizes downstream exhaust pressure.
  • the exhaust manifold bolts to the side of the air motor air valve and serves to direct, muffle and diffuse the air motor exhaust using several components.
  • a deflection plate disperses the initial exhaust blast as it leaves the air valve and enters the exhaust manifold. The deflection plate partially deflects the port noise and slows down and spreads out the tightly focused blast thereby reducing noise and exhaust velocity.
  • a diffraction plate in the exhaust manifold diffracts and disperses the exhaust blast through many small holes rather one larger cross-section again reducing noise and exhaust velocity.
  • An expansion chamber is provided in the manifold to direct the exhaust out of the air valve and down the center of the muffler. The muffler cross-section is also split into an expansion chamber and a nozzle with the expansion chamber allowing the exhaust blast to expand and dissipate before exiting the manifold through the diffraction plate and nozzle.
  • Figure 1 shows a cross-section f the air motor and in particular the exhaust system thereof.
  • the air motor 10 of the instant invention has a piston 12 and an air valve 14.
  • the induction exhaust has an exhaust manifold 16 and a muffler 22.
  • warm ambient air is drawn into the muffler 22. Heat from this external source is conducted through the finned manifold 16 to melt ice that can form inside the manifold 16 during the exhaust cycle.
  • the exhaust manifold 16 directs the exhaust air stream into the muffler 22 such that it creates a thin high velocity air stream creating a low pressure region on both sides of the stream due to the Bernoulli effect. This low pressure region creates a pressure differential which draws the warm external air into the exhaust system. The more external air that is drawn in, the more that icing will be reduced. This requires minimizing downstream exhaust pressure.
  • a reverberation chamber 26 is added after the muffler 22 exit allowing the sound waves to disperse over time while minimizing backpressure.
  • Reciprocating air motors have a short (15-50 msec.) blast of noise and the reverb chamber reduces peak levels and increases the duration of the noise.
  • the chamber also has a capacitance function which minimizes downstream exhaust pressure.
  • the exhaust manifold 16 bolts to the side of the air motor air valve 14 and serves to direct, muffle and diffuse the air motor exhaust using several components.
  • a deflection plate disperses the initial exhaust blast as it leaves the air valve and enters the exhaust manifold. The deflection plate partially deflects the port noise and slows down and spreads out the tightly focused blast thereby reducing noise and exhaust velocity.
  • a diffraction plate in the exhaust manifold diffracts and disperses the exhaust blast through many small holes rather one larger cross-section again reducing noise and exhaust velocity.
  • An expansion chamber is provided in the manifold to direct the exhaust out of the air valve and down the center of the muffler.
  • the muffler cross-section is also split into an expansion chamber and a nozzle with the expansion chamber allowing the exhaust blast to expand and dissipate before exiting the manifold through the diffraction plate and nozzle. It is contemplated that various changes and modifications may be made to the exhaust system without departing from the spirit and scope of the invention as defined by the following claims.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Exhaust Silencers (AREA)

Abstract

The induction exhaust has an exhaust manifold 16 and a muffler 22. In the instant invention, warm ambient air is drawn into the muffler 22. Heat from this external source is conducted through the finned manifold 16 to melt ice that can form inside the manifold 16 during the exhaust cycle. The exhaust manifold 16 bolts to the side of the air motor air valve 14 and serves to direct, muffle and diffuse the air motor exhaust using a deflection plate, a diffraction plate and an expansion chamber is provided in the manifold to direct the exhaust out of the air valve and down the center of the muffler 22.

Description

ICING RESISTANT REDUCED NOISE AIR MOTOR EXHAUST
TECHNICAL FIELD
This application claims the benefit of US Application serial number 60/820,405, filed July 26, 2006.
BACKGROUND ART
While reciprocating air motors are well suited for operating reciprocating piston pumps, they can at times suffer from exhaust noise and a tendency to have ice build up in the air valve and/or exhaust passages due to the rapid expansion of the exhaust. US Patent no. 4,921,408 is one such attempt to improve operation and the contents thereof are incorporated by reference. .
DISCLOSURE OF THE INVENTION
The induction exhaust has an exhaust manifold and a muffler. In the instant invention, warm ambient air is drawn into the muffler. Heat from this external source is conducted through the finned manifold to melt ice that can form inside the manifold during the exhaust cycle. The exhaust manifold directs the exhaust air stream into the muffler such that it creates a thin high velocity air stream creating a low pressure region on both sides of the stream due to the Bernoulli effect. This low pressure region creates a pressure differential which draws the warm external air into the exhaust system. The more external air that is drawn in, the more that icing will be reduced. This requires minimizing downstream exhaust pressure.
Minimizing downstream exhaust pressure, however, can lead to higher noise levels. In order to reduce noise, a reverberation chamber is added after the muffler exit allowing the sound waves to disperse over time while minimizing backpressure. Reciprocating air motors have a short (15-50 msec.) blast of noise and the reverb chamber reduces peak levels and increases the duration of the noise. The chamber also has a capacitance function which minimizes downstream exhaust pressure.
The exhaust manifold bolts to the side of the air motor air valve and serves to direct, muffle and diffuse the air motor exhaust using several components. A deflection plate disperses the initial exhaust blast as it leaves the air valve and enters the exhaust manifold. The deflection plate partially deflects the port noise and slows down and spreads out the tightly focused blast thereby reducing noise and exhaust velocity. A diffraction plate in the exhaust manifold diffracts and disperses the exhaust blast through many small holes rather one larger cross-section again reducing noise and exhaust velocity. An expansion chamber is provided in the manifold to direct the exhaust out of the air valve and down the center of the muffler. The muffler cross-section is also split into an expansion chamber and a nozzle with the expansion chamber allowing the exhaust blast to expand and dissipate before exiting the manifold through the diffraction plate and nozzle.
These and other objects and advantages of the invention will appear more fully from the following description made in conjunction with the accompanying drawings wherein like reference characters refer to the same or similar parts throughout the several views.
BRIEF DESCRIPTION OF DRAWINGS
Figure 1 shows a cross-section f the air motor and in particular the exhaust system thereof.
BESTMODEFORCARRYING OUTTHEINVENTION
The air motor 10 of the instant invention has a piston 12 and an air valve 14. The induction exhaust has an exhaust manifold 16 and a muffler 22. In the instant invention, warm ambient air is drawn into the muffler 22. Heat from this external source is conducted through the finned manifold 16 to melt ice that can form inside the manifold 16 during the exhaust cycle.
The exhaust manifold 16 directs the exhaust air stream into the muffler 22 such that it creates a thin high velocity air stream creating a low pressure region on both sides of the stream due to the Bernoulli effect. This low pressure region creates a pressure differential which draws the warm external air into the exhaust system. The more external air that is drawn in, the more that icing will be reduced. This requires minimizing downstream exhaust pressure.
Minimizing downstream exhaust pressure, however, can lead to higher noise levels. In order to reduce noise, a reverberation chamber 26 is added after the muffler 22 exit allowing the sound waves to disperse over time while minimizing backpressure. Reciprocating air motors have a short (15-50 msec.) blast of noise and the reverb chamber reduces peak levels and increases the duration of the noise. The chamber also has a capacitance function which minimizes downstream exhaust pressure.
The exhaust manifold 16 bolts to the side of the air motor air valve 14 and serves to direct, muffle and diffuse the air motor exhaust using several components. A deflection plate disperses the initial exhaust blast as it leaves the air valve and enters the exhaust manifold. The deflection plate partially deflects the port noise and slows down and spreads out the tightly focused blast thereby reducing noise and exhaust velocity. A diffraction plate in the exhaust manifold diffracts and disperses the exhaust blast through many small holes rather one larger cross-section again reducing noise and exhaust velocity. An expansion chamber is provided in the manifold to direct the exhaust out of the air valve and down the center of the muffler. The muffler cross-section is also split into an expansion chamber and a nozzle with the expansion chamber allowing the exhaust blast to expand and dissipate before exiting the manifold through the diffraction plate and nozzle. It is contemplated that various changes and modifications may be made to the exhaust system without departing from the spirit and scope of the invention as defined by the following claims.

Claims

1. An exhaust for use with a reciprocating air motor having an air valve, said exhaust comprising:
a finned exhaust manifold;
a muffler;
air passages for drawing warm ambient air into said muffler so that heat from said warm ambient air is conducted through said finned manifold to melt ice that can form inside the manifold during the exhaust cycle.
2. The exhaust of claim 1 wherein said manifold directs the exhaust air stream into said muffler such that it creates a thin high velocity air stream creating a low pressure region on both sides of the stream due to the Bernoulli effect creating a pressure differential which draws the warm external air into the exhaust system.
3. The exhaust of claim 1 further comprising a reverberation chamber after the muffler exit allowing the sound waves to disperse over time while minimizing backpressure.
4. The exhaust of claim 1 wherein said exhaust manifold bolts to the side of said air motor air valve and serves to direct, muffle and diffuse the air motor exhaust.
5. The exhaust of claim 1 further comprising a deflection plate for dispersing the initial exhaust blast as it leaves said air valve and enters said exhaust manifold.
6. The exhaust of claim 1 further comprising a diffraction plate comprising many small holes in said exhaust manifold to diffract and disperse the exhaust blast to reduce noise and exhaust velocity.
7. The exhaust of claim 1 further comprising an expansion chamber in said manifold to direct the exhaust out of said air valve and down the center of said muffler.
EP07840510A 2006-07-26 2007-07-25 Icing resistant reduced noise air motor exhaust Withdrawn EP2049353A4 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US82040506P 2006-07-26 2006-07-26
PCT/US2007/074324 WO2008014322A2 (en) 2006-07-26 2007-07-25 Icing resistant reduced noise air motor exhaust

Publications (2)

Publication Number Publication Date
EP2049353A2 true EP2049353A2 (en) 2009-04-22
EP2049353A4 EP2049353A4 (en) 2009-11-25

Family

ID=38982295

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07840510A Withdrawn EP2049353A4 (en) 2006-07-26 2007-07-25 Icing resistant reduced noise air motor exhaust

Country Status (11)

Country Link
US (1) US20090288403A1 (en)
EP (1) EP2049353A4 (en)
JP (1) JP2009544897A (en)
KR (1) KR20090033277A (en)
CN (1) CN101495339A (en)
AU (1) AU2007279295A1 (en)
BR (1) BRPI0714951A2 (en)
MX (1) MX2009000904A (en)
RU (1) RU2009106652A (en)
TW (1) TW200830674A (en)
WO (1) WO2008014322A2 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130105039A1 (en) 2011-10-27 2013-05-02 Graco Minnesota Inc. Method and apparatus for melting
WO2013063231A1 (en) 2011-10-27 2013-05-02 Graco Minnesota Inc. Sprayer fluid supply with collapsible liner
US10503039B2 (en) 2013-06-28 2019-12-10 View, Inc. Controlling transitions in optically switchable devices
FR2990379B1 (en) 2012-05-10 2014-04-25 Saint Gobain GLAZING LIGHTING WITH DEFLECTOR INCORPORATED
US9796492B2 (en) 2015-03-12 2017-10-24 Graco Minnesota Inc. Manual check valve for priming a collapsible fluid liner for a sprayer
KR102446833B1 (en) 2018-01-15 2022-09-26 그라코 미네소타 인크. compressed air drive motor
CN109205721A (en) * 2018-08-18 2019-01-15 杜文娟 Use the device for the method progress sea ice desalination for accelerating air-flow
US20220234062A1 (en) 2019-05-31 2022-07-28 Graco Minnesota Inc. Handheld fluid sprayer

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5161450A (en) * 1989-03-17 1992-11-10 Graco, Inc. Air motor with warm air introduction means to prevent freezing
US5189943A (en) * 1992-07-31 1993-03-02 Graco Inc. Device for reducing icing
WO1995004208A1 (en) * 1993-07-29 1995-02-09 Binks Bullows Limited Air motor with means to prevent freezing

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US3789954A (en) * 1973-06-19 1974-02-05 Graco Inc Air motor noise suppressor
US4135602A (en) * 1977-05-20 1979-01-23 The Aro Corporation Selectively positioned muffler
US4333754A (en) * 1979-06-27 1982-06-08 Vortec Corporation Anti-icing noise-suppressing vortex tube assembly
FR2487241A1 (en) * 1980-07-25 1982-01-29 Maco Meudon Sa ANTI-FROZEN DEVICE FOR PNEUMATIC TOOLS
SE432375B (en) * 1982-09-16 1984-04-02 Atlas Copco Ab DEVICE FOR SILENCE FOR PRESSURE AIR DRIVES
US4780076A (en) * 1985-10-11 1988-10-25 Arkansas Patents, Inc. Power burner
DE3734716C1 (en) * 1987-10-14 1989-04-13 Chiron Werke Gmbh Protective cover
JPH0744766Y2 (en) * 1988-11-10 1995-10-11 日東工器株式会社 Air compressor
US4921408A (en) * 1988-11-28 1990-05-01 Graco Inc. Non-icing quiet air-operated pump
JP2569496Y2 (en) * 1991-06-07 1998-04-22 日東工器株式会社 Diaphragm pump
GB9222475D0 (en) * 1992-10-24 1992-12-09 Mangar Aids Ltd Air pump apparatus
US5371331A (en) * 1993-06-25 1994-12-06 Wall; Alan T. Modular muffler for motor vehicles
US5363739A (en) * 1993-10-12 1994-11-15 Graco Inc. Reduced icing low friction air valve
US5366353A (en) * 1994-04-13 1994-11-22 Hand Kent P Air valve with bleed feature to inhibit icing
US5567127A (en) * 1994-11-09 1996-10-22 Wentz; Kennith W. Low noise air blower
JP3029092B2 (en) * 1996-05-21 2000-04-04 羊太郎 多賀 Silencer in impact wrench
US6340069B1 (en) * 2000-07-19 2002-01-22 Meiko Pet Corporation Sound elimination structure for air pump
US7563077B2 (en) * 2004-09-27 2009-07-21 Santa Ana Roland C Quiet fluid pump

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5161450A (en) * 1989-03-17 1992-11-10 Graco, Inc. Air motor with warm air introduction means to prevent freezing
US5189943A (en) * 1992-07-31 1993-03-02 Graco Inc. Device for reducing icing
WO1995004208A1 (en) * 1993-07-29 1995-02-09 Binks Bullows Limited Air motor with means to prevent freezing

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2008014322A2 *

Also Published As

Publication number Publication date
US20090288403A1 (en) 2009-11-26
BRPI0714951A2 (en) 2013-05-21
EP2049353A4 (en) 2009-11-25
WO2008014322A3 (en) 2008-07-31
MX2009000904A (en) 2009-02-04
WO2008014322A2 (en) 2008-01-31
KR20090033277A (en) 2009-04-01
RU2009106652A (en) 2010-09-10
TW200830674A (en) 2008-07-16
CN101495339A (en) 2009-07-29
AU2007279295A1 (en) 2008-01-31
JP2009544897A (en) 2009-12-17

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