US1314143A - Brake-cylinder piston-packing. - Google Patents

Brake-cylinder piston-packing. Download PDF

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Publication number
US1314143A
US1314143A US19251017A US1314143A US 1314143 A US1314143 A US 1314143A US 19251017 A US19251017 A US 19251017A US 1314143 A US1314143 A US 1314143A
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United States
Prior art keywords
packing
brake
cylinder piston
piston
fabric
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.)
Expired - Lifetime
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Inventor
Harry C Loudenbeck
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.)
Westinghouse Air Brake Co
Original Assignee
Westinghouse Air Brake Co
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.)
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Publication date
Application filed by Westinghouse Air Brake Co filed Critical Westinghouse Air Brake Co
Priority to US19251017 priority Critical patent/US1314143A/en
Application granted granted Critical
Publication of US1314143A publication Critical patent/US1314143A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3284—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings characterised by their structure; Selection of materials
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/3167—Of cork

Definitions

  • This invention relates to packing, and more particularly to cupped packing as employed in pistons adapted to work in cyliners.
  • Piston packing of the above character is ordinarily made of leather and in order to hold the acking tightly against the walls of the cy inder, it is usual to employ a resilient expander ring which of the packing and acts against the packing.
  • one ob]ect of my in vention is to provide a piston packing formed of other material.
  • Another object of my invention is to provide a piston packing which will have inherent resiliency to press firmly against the cylinder wall and thus dispense with the use of expander rings.
  • Another disadvantage in the use of leather for piston packing is that it becomes more or less porous to fluids and liquids in service, so that leakage occurs through the packing, and a further object of my invention is'to provide a leak proof packing.
  • F1gure 1 is a section on line'1-1 of Fig. 2 of a pmton packing constructed in accordance with my invention
  • Fig. 2 a plan now thereof
  • Fig. 3 an enlarged transverse section of a portion of the packing
  • my inventlon is formed of layers of ground cork w1th an intermediate layer of fabric, the resulting pile being pressed into the desired cup shape by means of a die mold and press.
  • the round cork disks are coated on one side with glue and referably the fabric disk is also coated wit 1 glue.
  • a pile is then made of two ground cork disks with an intermediate disk of fabric and the pile is placed in a die mold where it is formed into the cup shape while the glue remains unset.
  • the pile is retained in the die mold and is heat treated to set the glue and is then ready for service.
  • the packing comprises a flange 1 which is secured to the piston and a flange 2 which bears against thewalls of the cylinder.
  • the flange 2 is flared outwardly and it has been found that the resiliency given to p i the packing by the reinforcing fabric layer is ample to maintain the packing tightly against the walls of the piston cylinder, so that it is not necessary to employ an expander ring for that urpose. Furthermore, the packing retains t 115 resiliency throughout the life of the packing.
  • Thefabric of the intermediate layer 3 of the acking is preferably duck or canvas.
  • T e interposition of the fabric layer while reinforcing the cork layers also prevents breaking of the packingat the bend while being formed as well as in service.
  • a cup shaped piston packing formed from pressed disks composed of ground cork with an intermediate layer .of duck fabric.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Treatment Of Fiber Materials (AREA)

Description

H. C. LOUDENBECK.
BRAKE CYLINDER PISTON PACKING.
APPLICATION FILED SEPT. 2|. I917- l1 ,3 1 4, 143 Patented Aug. '26, 1919.
INVENTOH Harry Loudenbeck UNITED STATES PATENT OFFICE.
PENNSYLVANIA, ASSIGNOR TO THE OF WILMERDING, PENNSYLVANIA,
A CORPORATION OF PENNSYLVANIA.
BRAKE-CYLINDER PISTON-PACKING.
Specification of Letters Patent.
Patented Aug. 26, 1919.
Application filed September 21, 1917. Serial No. 192,510.
To all whom it may concern:
Be it known that I, HARRY C. LOUDEN- BECK, a citizen of the United States, residing at Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented new and useful Improvements in Brake-Cylinder Piston-Packing, of which the following is a specification.
This invention relates to packing, and more particularly to cupped packing as employed in pistons adapted to work in cyliners.
Piston packing of the above character is ordinarily made of leather and in order to hold the acking tightly against the walls of the cy inder, it is usual to employ a resilient expander ring which of the packing and acts against the packing.
By reason of the increasing scarcity and high price of leather, one ob]ect of my in vention is to provide a piston packing formed of other material.
Another object of my invention is to provide a piston packing which will have inherent resiliency to press firmly against the cylinder wall and thus dispense with the use of expander rings.
Another disadvantage in the use of leather for piston packing is that it becomes more or less porous to fluids and liquids in service, so that leakage occurs through the packing, and a further object of my invention is'to provide a leak proof packing.
In the accompanying drawing; F1gure 1 is a section on line'1-1 of Fig. 2 of a pmton packing constructed in accordance with my invention; Fig. 2 a plan now thereof; and Fig. 3 an enlarged transverse section of a portion of the packing According to my inventlon, is formed of layers of ground cork w1th an intermediate layer of fabric, the resulting pile being pressed into the desired cup shape by means of a die mold and press.
The preferred process of making the the packing is fitted inside packing is covered by my co-pending application Serial No. 192,485, filed September 21, 1917, and consists briefly in providing disks cut from sheets of pressed ground corkmixed with a suitable binder and disks of fabric such as duck or canvas.
The round cork disks are coated on one side with glue and referably the fabric disk is also coated wit 1 glue. A pile is then made of two ground cork disks with an intermediate disk of fabric and the pile is placed in a die mold where it is formed into the cup shape while the glue remains unset.
The pile is retained in the die mold and is heat treated to set the glue and is then ready for service.
As shown in Fig. 1 of the drawing, the packing comprises a flange 1 which is secured to the piston and a flange 2 which bears against thewalls of the cylinder.
The flange 2 is flared outwardly and it has been found that the resiliency given to p i the packing by the reinforcing fabric layer is ample to maintain the packing tightly against the walls of the piston cylinder, so that it is not necessary to employ an expander ring for that urpose. Furthermore, the packing retains t 115 resiliency throughout the life of the packing.
- Thefabric of the intermediate layer 3 of the acking is preferably duck or canvas.
T e interposition of the fabric layer while reinforcing the cork layers, also prevents breaking of the packingat the bend while being formed as well as in service.
Having now described my invention, what I claim as new and desire to secure by Letters Patent, is
A cup shaped piston packing formed from pressed disks composed of ground cork with an intermediate layer .of duck fabric.
In testimony whereof I have hereunto set my hand.
HARRY G. LOUDENBEOK.
US19251017 1917-09-21 1917-09-21 Brake-cylinder piston-packing. Expired - Lifetime US1314143A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US19251017 US1314143A (en) 1917-09-21 1917-09-21 Brake-cylinder piston-packing.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US19251017 US1314143A (en) 1917-09-21 1917-09-21 Brake-cylinder piston-packing.

Publications (1)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2635331A (en) * 1950-02-25 1953-04-21 Dixon T Harbison Method of forming nonmetallic resilient packing rings

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2635331A (en) * 1950-02-25 1953-04-21 Dixon T Harbison Method of forming nonmetallic resilient packing rings

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