US3788072A - Rain cap for exhaust pipe - Google Patents

Rain cap for exhaust pipe Download PDF

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Publication number
US3788072A
US3788072A US00249897A US3788072DA US3788072A US 3788072 A US3788072 A US 3788072A US 00249897 A US00249897 A US 00249897A US 3788072D A US3788072D A US 3788072DA US 3788072 A US3788072 A US 3788072A
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United States
Prior art keywords
exhaust pipe
cylindrical body
cap
diameter
rain
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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.)
Expired - Lifetime
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US00249897A
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E Burger
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Ford Motor Co
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Ford Motor Co
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Publication date
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Publication of US3788072A publication Critical patent/US3788072A/en
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    • 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
    • F01N13/085—Other arrangements or adaptations of exhaust conduits having means preventing foreign matter from entering exhaust conduit

Definitions

  • a rain cap for a vertical exhaust of an internal com- [51] i 7/02 bustion engine is formed of an open-ended cylindrical 58] Fie'ld 60/324 319, 98/59 body larger than the exhaust pipe and having a pivotally mounted cover opened by exhaust gases and [56] References Cited closed by gravity. Portions struck from the body sup- UNITED STATES PATENTS port it from the exhaust pipe. 2,420,700 5/ 1947 Curphy 60/324 1 Claim, 3 Drawing Figures RAIN CAP FOR EXHAUST PIPE This invention relates to rain caps for vertical, upwardly directed exhaust pipes for internal combustion engines.
  • a cap or cover is pivotally mounted in a cylindrical body which is of somewhat larger diameter than the exhaust pipe to leave an annular space for rain dripping from the edge of the cover to drain downwardly along the outside of the exhaust pipe.
  • the body is formed as an open-ended sheet metal cylinder having diametrically opposite slit portions displaced inwardly at the bottom of the body to engage the exhaust pipe and support the body.
  • FIG. 1 is a perspective view of the rain cap of the present invention applied to an exhaust pipe, a portion of the body being broken away;
  • FIG. 2 is a vertical section through cap and exhaust pipe end
  • FIG. 3 is a horizontal section taken on the line 3-3 of FIG. 2.
  • the rain cap assembly of the present invention comprises a cylindrical body which is made of sheet metal and has open top and bottom ends.
  • the diameter of the body 10 is somewhat larger than the diameter of the vertically upwardly extending exhaust pipe II to leave an annular space 12 between the body and the outside wall of the exhaust pipe.
  • a circular cover 14 of diameter somewhat larger than the diameter of the exhaust pipe is mounted in the upper portion of the body on a horizontal pivot 15 extending from side to side of and supported by the body 10.
  • the pivot 15 is offset a short distance from the center of the cover 14 so that the cover will be gravitybiased in a direction to close the exhaust pipe 11 when the vehicle engine is not in use.
  • a tab 16 is struck inwardly from the wall of the body 10 to form a stop limiting rotation of the cover 14 to a generally horizontal position at which time it overlies the open end of the exhaust pipe 11.
  • the body 10 is mounted concentric to the upper end of the exhaust pipe 11 by a pipe of inwardly displaced portions 19 struck from the lower edge of the body 10. These portions are formed by slitting body 10 at 21 on diametrically opposite sides of the body and then forming the portions 19 into arcuate confronting portions adapted to engage the outside of the exhaust pipe 11 a short distance below its upper end. If desired, a self tapping bolt 24 may be engaged with each of the portions 19 and the exhaust pipe to clamp the body 10 in position on the exhaust pipe.
  • the cover 14 In closed position, the cover 14, which is somewhat larger in diameter than the exhaust pipe 11, will prevent direct entrance of rain into the exhaust pipe. Water dripping from the edges of the cover 14 will pass downwardly through the annular space 12 between the body and the outside of the exhaust pipe and thus will not enter into the exhaust pipe and into the engine.
  • the body 10 will protect the cover 14 and its pivot 15 from damage.
  • a rain cap for a vertical upwardly directed internal combustion engine exhaust pipe comprising a cylindrical body having both ends open and having a diameter somewhat larger than the diameter of the exhaust pipe, a lower edge portion of said cylindrical body being split at opposite sides parallel to said lower edge portion and displaced inwardly and formed to provide two confronting arcuate portions adapted to engage the outside of the exhaust pipe a short distance below its upper end to support said cylindrical body generally concentrically on the upper end of the exhaust pipe with the upper end of said cap projecting 7 beyond the end of the exhaust pipe with the space be-

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

Abstract

A rain cap for a vertical exhaust of an internal combustion engine is formed of an open-ended cylindrical body larger than the exhaust pipe and having a pivotally mounted cover opened by exhaust gases and closed by gravity. Portions struck from the body support it from the exhaust pipe.

Description

United States Patent 1 1 1111 3,788,072
Burger Jan. 29, 1974 RAIN CAP FOR EXHAUST PIPE 2,728,408 12/1955 Deliman 60/319 [75] Inventor: Edgar P. Burger, Detroit, Mich.
Primary ExaminerDouglas Hart [73] Assignee Motor m Dearbom Attorney, Agent, or Firm-William E. Johnson; Keith L. Zerschling [22] Filed: May 3, 1972 [52] U 8 Cl 60/324 98/59 A rain cap for a vertical exhaust of an internal com- [51] i 7/02 bustion engine is formed of an open-ended cylindrical 58] Fie'ld 60/324 319, 98/59 body larger than the exhaust pipe and having a pivotally mounted cover opened by exhaust gases and [56] References Cited closed by gravity. Portions struck from the body sup- UNITED STATES PATENTS port it from the exhaust pipe. 2,420,700 5/ 1947 Curphy 60/324 1 Claim, 3 Drawing Figures RAIN CAP FOR EXHAUST PIPE This invention relates to rain caps for vertical, upwardly directed exhaust pipes for internal combustion engines.
Vertical exhausts usually are provided with rain caps to prevent the entrance of rain and foreign matter at times when the engine is not being operated. These rain caps are usually gravity-biased to closed position, the stream of exhaust gas during operation of the engine opening the cap against its bias and holding it open.
In the cap of the present invention, a cap or cover is pivotally mounted in a cylindrical body which is of somewhat larger diameter than the exhaust pipe to leave an annular space for rain dripping from the edge of the cover to drain downwardly along the outside of the exhaust pipe. The body is formed as an open-ended sheet metal cylinder having diametrically opposite slit portions displaced inwardly at the bottom of the body to engage the exhaust pipe and support the body.
Among the objects of the present invention are to provide an improved rain cap for vertical exhausts which is simple, easy and economical to manufacture, which may easily be attached to a vertical exhaust and which is rugged and dependable in operation.
Other objects, and objects relating to details of construction and use will be more apparent from the detailed description to follow.
This invention is clearly defined in. the appended claims. In the claims, as well as in the description, parts may at times be identified by specific names for clarity and convenience, but such nomenclature is to be understood as having the broadest meaning consistent with the context and with the concept of this invention as distinguished from the pertinent prior art. The best form in which has been contemplated applying this invention is illustrated in the accompanying drawings forming part of this specification in which:
FIG. 1 is a perspective view of the rain cap of the present invention applied to an exhaust pipe, a portion of the body being broken away;
FIG. 2 is a vertical section through cap and exhaust pipe end; and
FIG. 3 is a horizontal section taken on the line 3-3 of FIG. 2.
Referring now to the drawings, the rain cap assembly of the present invention comprises a cylindrical body which is made of sheet metal and has open top and bottom ends. The diameter of the body 10 is somewhat larger than the diameter of the vertically upwardly extending exhaust pipe II to leave an annular space 12 between the body and the outside wall of the exhaust pipe. A circular cover 14 of diameter somewhat larger than the diameter of the exhaust pipe is mounted in the upper portion of the body on a horizontal pivot 15 extending from side to side of and supported by the body 10. The pivot 15 is offset a short distance from the center of the cover 14 so that the cover will be gravitybiased in a direction to close the exhaust pipe 11 when the vehicle engine is not in use.
A tab 16 is struck inwardly from the wall of the body 10 to form a stop limiting rotation of the cover 14 to a generally horizontal position at which time it overlies the open end of the exhaust pipe 11. A second tab 17 struck inwardly from the body 10 limits opening movement of the cover 14. The tab 17 is positioned to permit the cover 14 to rotate most of the way towards the open position, as shown in the drawings.
The body 10 is mounted concentric to the upper end of the exhaust pipe 11 by a pipe of inwardly displaced portions 19 struck from the lower edge of the body 10. These portions are formed by slitting body 10 at 21 on diametrically opposite sides of the body and then forming the portions 19 into arcuate confronting portions adapted to engage the outside of the exhaust pipe 11 a short distance below its upper end. If desired, a self tapping bolt 24 may be engaged with each of the portions 19 and the exhaust pipe to clamp the body 10 in position on the exhaust pipe.
In operation, immediately upon starting the internal combustion engine, the current of exhaust gases exiting from the exhaust pipe 11 will press against the underside of the cover 14 to rotate it to open position against the tab 17. The cover will remain in open position until the engine is shut off, at which time under the force of gravity the cover will rotate to closed position against the tab 16.
In closed position, the cover 14, which is somewhat larger in diameter than the exhaust pipe 11, will prevent direct entrance of rain into the exhaust pipe. Water dripping from the edges of the cover 14 will pass downwardly through the annular space 12 between the body and the outside of the exhaust pipe and thus will not enter into the exhaust pipe and into the engine. The body 10 will protect the cover 14 and its pivot 15 from damage.
I claim:
1. A rain cap for a vertical upwardly directed internal combustion engine exhaust pipe, said cap comprising a cylindrical body having both ends open and having a diameter somewhat larger than the diameter of the exhaust pipe, a lower edge portion of said cylindrical body being split at opposite sides parallel to said lower edge portion and displaced inwardly and formed to provide two confronting arcuate portions adapted to engage the outside of the exhaust pipe a short distance below its upper end to support said cylindrical body generally concentrically on the upper end of the exhaust pipe with the upper end of said cap projecting 7 beyond the end of the exhaust pipe with the space be-

Claims (1)

1. A rain cap for a vertical upwardly directed internal combustion engine exhaust pipe, said cap comprising a cylindrical body having both ends open and having a diameter somewhat larger than the diameter of the exhaust pipe, a lower edge portion of said cylindrical body being split at opposite sides parallel to said lower edge portion and displaced inwardly and formed to provide two confronting arcuate portions adapted to engage the outside of the exhaust pipe a short distance below its upper end to support said cylindrical body generally concentrically on the upper end of the exhaust pipe with the upper end of said cap projecting beyond the end of the exhaust pipe with the space between said cylindrical body and the exhaust pipe being substantially unobstructed, a circular cover pivotally mounted on a horizontal axis within said cylindrical body in spaced relation above the end of the exhaust pipe, said circular cover having a diameter greater than the diameter of the exhaust pipe and being biased towards horizontal position to block entrance of rain into the exhaust pipe, the mounting of said cylindrical cover permitting it too be swung towards vertical position against its bias by gas issuing from the exhaust pipe.
US00249897A 1972-05-03 1972-05-03 Rain cap for exhaust pipe Expired - Lifetime US3788072A (en)

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Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4143731A (en) * 1977-12-22 1979-03-13 General Motors Corporation Exhaust flow directional device
US4159078A (en) * 1978-03-07 1979-06-26 Werner Diermayer Draft control arrangement for combustion apparatus
DE2804428A1 (en) * 1978-02-02 1979-08-09 Kloeckner Humboldt Deutz Ag IC engine vertical exhaust pipe - has larger dia. tubular cowl with internal helical partition fixed coaxially over top
US4198817A (en) * 1977-12-13 1980-04-22 Toyota Jidosha Kogyo Kabushiki Kaisha Exhaust gas diffuser
DE3008170A1 (en) * 1980-03-04 1981-09-17 Klöckner-Humboldt-Deutz AG, 5000 Köln Rain excluding flap for upright IC engine exhaust pipe - is protected by cylindrical sleeve around pipe end and pivoted in plane above end
US4603619A (en) * 1980-01-25 1986-08-05 Andre Amphoux Flue terminal gas extractor
US4667582A (en) * 1986-05-12 1987-05-26 Davison Jerome G Dynamically balanced exhaust pipe cap
US4742766A (en) * 1986-05-12 1988-05-10 Davison Jerome G Dynamically balanced exhaust pipe cap
US4821629A (en) * 1988-05-04 1989-04-18 Davison Jerom G Dynamically balanced exhaust pipe cap
US4827715A (en) * 1987-11-30 1989-05-09 Caterpillar Inc. Crankcase fumes disposal system
US4903484A (en) * 1989-05-08 1990-02-27 Yates Clyde I Exhaust dissipator and deflector
US5259411A (en) * 1992-11-02 1993-11-09 The Field Controls Division Of Heico, Inc. Flow control
US5722235A (en) * 1996-08-26 1998-03-03 Ccl, Inc. Exhaust gas back pressure attenuator for truck exhaust stacks
US6527006B2 (en) 2001-07-02 2003-03-04 Arvinmeritor, Inc. Exhaust valve assembly
US6732511B2 (en) * 2001-06-19 2004-05-11 Faurecia Abgastechnik Gmbh Exhaust flap
US20050090193A1 (en) * 2003-09-29 2005-04-28 Richard Urash Exhaust pipe cover
EP1630370A1 (en) * 2004-08-24 2006-03-01 Pierburg Instruments GmbH Exhaust gas flap housing and exhaust gas flap device
US20060192375A1 (en) * 2004-12-30 2006-08-31 Davis Eric A Frame design for reduced-size vehicle
US20070101689A1 (en) * 2005-11-09 2007-05-10 William Gaskins Vent protector device for exhaust vents of buildings
US20080110164A1 (en) * 2006-11-14 2008-05-15 Tenneco Automotive Operating Company Inc. Device for lowering tail pipe exhaust temperature
US20080116005A1 (en) * 2006-11-20 2008-05-22 Matte Francois Exhaust gas diffuser
US20090050063A1 (en) * 2007-08-23 2009-02-26 Shih-Ming Chang Feeding device using air flow
US20100140014A1 (en) * 2008-12-04 2010-06-10 Hyundai Motor Company Flow Passage Control Valve for Muffler
DE102004051627B4 (en) * 2004-10-23 2010-07-01 Pierburg Gmbh Exhaust flap means
US20110011669A1 (en) * 2009-07-14 2011-01-20 Compx International Inc. Sound dampening and wear protecting flapper configuration for marine exhaust system
DE19755617B4 (en) * 1997-12-13 2014-02-27 TROX TLT GmbH flow channel
FR3014482A3 (en) * 2013-12-10 2015-06-12 Renault Sa EXHAUST GAS OUTPUT DEVICE FOR A MOTOR VEHICLE HAVING AN INTERNAL PROTECTIVE PROTECTOR FOR A PROBE
US10968808B2 (en) 2018-09-17 2021-04-06 Ronda Kimberly Johnson Tailpipe riser

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2420700A (en) * 1944-10-18 1947-05-20 William C Curphy Exhaust pipe attachment
US2728408A (en) * 1953-12-11 1955-12-27 Deliman George Automobile accessory for burning exhaust gases

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2420700A (en) * 1944-10-18 1947-05-20 William C Curphy Exhaust pipe attachment
US2728408A (en) * 1953-12-11 1955-12-27 Deliman George Automobile accessory for burning exhaust gases

Cited By (49)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4198817A (en) * 1977-12-13 1980-04-22 Toyota Jidosha Kogyo Kabushiki Kaisha Exhaust gas diffuser
US4143731A (en) * 1977-12-22 1979-03-13 General Motors Corporation Exhaust flow directional device
DE2804428A1 (en) * 1978-02-02 1979-08-09 Kloeckner Humboldt Deutz Ag IC engine vertical exhaust pipe - has larger dia. tubular cowl with internal helical partition fixed coaxially over top
US4159078A (en) * 1978-03-07 1979-06-26 Werner Diermayer Draft control arrangement for combustion apparatus
US4603619A (en) * 1980-01-25 1986-08-05 Andre Amphoux Flue terminal gas extractor
DE3008170A1 (en) * 1980-03-04 1981-09-17 Klöckner-Humboldt-Deutz AG, 5000 Köln Rain excluding flap for upright IC engine exhaust pipe - is protected by cylindrical sleeve around pipe end and pivoted in plane above end
US4667582A (en) * 1986-05-12 1987-05-26 Davison Jerome G Dynamically balanced exhaust pipe cap
US4742766A (en) * 1986-05-12 1988-05-10 Davison Jerome G Dynamically balanced exhaust pipe cap
US4827715A (en) * 1987-11-30 1989-05-09 Caterpillar Inc. Crankcase fumes disposal system
WO1989005394A1 (en) * 1987-11-30 1989-06-15 Caterpillar Inc. Crankcase fumes disposal system
US4821629A (en) * 1988-05-04 1989-04-18 Davison Jerom G Dynamically balanced exhaust pipe cap
US4970859A (en) * 1989-05-08 1990-11-20 Yates Clyde I Exhaust gas deflector for truck exhaust stacks
US4903484A (en) * 1989-05-08 1990-02-27 Yates Clyde I Exhaust dissipator and deflector
US5259411A (en) * 1992-11-02 1993-11-09 The Field Controls Division Of Heico, Inc. Flow control
US5722235A (en) * 1996-08-26 1998-03-03 Ccl, Inc. Exhaust gas back pressure attenuator for truck exhaust stacks
DE19755617B4 (en) * 1997-12-13 2014-02-27 TROX TLT GmbH flow channel
US6732511B2 (en) * 2001-06-19 2004-05-11 Faurecia Abgastechnik Gmbh Exhaust flap
US6527006B2 (en) 2001-07-02 2003-03-04 Arvinmeritor, Inc. Exhaust valve assembly
US20050090193A1 (en) * 2003-09-29 2005-04-28 Richard Urash Exhaust pipe cover
US6921327B2 (en) 2003-09-29 2005-07-26 Richard Urash Exhaust pipe cover
EP1630370A1 (en) * 2004-08-24 2006-03-01 Pierburg Instruments GmbH Exhaust gas flap housing and exhaust gas flap device
US20060042239A1 (en) * 2004-08-24 2006-03-02 Pierburg Gmbh Exhaust flap housing as well as an exhaust flap means
US8550053B2 (en) * 2004-08-24 2013-10-08 Pierburg Gmbh Exhaust flap housing as well as an exhaust flap means
DE102004051627B4 (en) * 2004-10-23 2010-07-01 Pierburg Gmbh Exhaust flap means
US20110198830A1 (en) * 2004-12-30 2011-08-18 American Off-Road Technologies, Llc Reduced-size vehicle with complementary internal compartments and suspension system components
US8622428B2 (en) 2004-12-30 2014-01-07 American Off-Road Technologies, Llc Reduced-size vehicle with large internal voids
US9266580B2 (en) 2004-12-30 2016-02-23 American Off-Road Technologies, Llc Reduced-size vehicle with large internal voids
US8783720B2 (en) 2004-12-30 2014-07-22 American Off-Road Technologies, Llc Reduced-size vehicle with complementary internal compartments and suspension system components
US20100108428A1 (en) * 2004-12-30 2010-05-06 American Off-Road Technologies, Llc Exhaust and cooling systems for implementation in reduced-size vehicle
US20060192375A1 (en) * 2004-12-30 2006-08-31 Davis Eric A Frame design for reduced-size vehicle
US20060197331A1 (en) * 2004-12-30 2006-09-07 Davis Eric A Reduced-size vehicle with coplementary internal compartments and suspension system components
US8191929B2 (en) 2004-12-30 2012-06-05 American Off-Road Technologies, Llc Reduced-size vehicle with large internal voids
US8191677B2 (en) * 2004-12-30 2012-06-05 American Off-Road Technologies, Llc Exhaust and cooling systems for implementation in reduced-size vehicle
US8191930B2 (en) 2004-12-30 2012-06-05 American Off-Road Technologies, Llc Frame design for reduced-size vehicle
US7942447B2 (en) 2004-12-30 2011-05-17 American Off-Road Technologies, Llc Frame design for reduced-size vehicle
US7954853B2 (en) 2004-12-30 2011-06-07 American Off-Road Technologies, Llc Reduced-size vehicle with complementary internal compartments and suspension system components
US20110198831A1 (en) * 2004-12-30 2011-08-18 American Off-Road Technologies, Llc Frame design for reduced-size vehicle
US20070101689A1 (en) * 2005-11-09 2007-05-10 William Gaskins Vent protector device for exhaust vents of buildings
US7566355B2 (en) * 2005-11-09 2009-07-28 William Gaskins Vent protector device for exhaust vents of buildings
US7913489B2 (en) 2006-11-14 2011-03-29 Tenneco Automotive Operating Company, Inc. Device for lowering tail pipe exhaust temperature
US20080110164A1 (en) * 2006-11-14 2008-05-15 Tenneco Automotive Operating Company Inc. Device for lowering tail pipe exhaust temperature
US7779961B2 (en) * 2006-11-20 2010-08-24 Matte Francois Exhaust gas diffuser
US20080116005A1 (en) * 2006-11-20 2008-05-22 Matte Francois Exhaust gas diffuser
US20090050063A1 (en) * 2007-08-23 2009-02-26 Shih-Ming Chang Feeding device using air flow
US20100140014A1 (en) * 2008-12-04 2010-06-10 Hyundai Motor Company Flow Passage Control Valve for Muffler
US8056673B2 (en) * 2009-07-14 2011-11-15 Compx International Inc. Sound dampening and wear protecting flapper configuration for marine exhaust system
US20110011669A1 (en) * 2009-07-14 2011-01-20 Compx International Inc. Sound dampening and wear protecting flapper configuration for marine exhaust system
FR3014482A3 (en) * 2013-12-10 2015-06-12 Renault Sa EXHAUST GAS OUTPUT DEVICE FOR A MOTOR VEHICLE HAVING AN INTERNAL PROTECTIVE PROTECTOR FOR A PROBE
US10968808B2 (en) 2018-09-17 2021-04-06 Ronda Kimberly Johnson Tailpipe riser

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