US1079404A - Packing-expander. - Google Patents

Packing-expander. Download PDF

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Publication number
US1079404A
US1079404A US57405410A US1910574054A US1079404A US 1079404 A US1079404 A US 1079404A US 57405410 A US57405410 A US 57405410A US 1910574054 A US1910574054 A US 1910574054A US 1079404 A US1079404 A US 1079404A
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US
United States
Prior art keywords
packing
ring
expander
sheet metal
section
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
Application number
US57405410A
Inventor
George F De Wein
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.)
Johns Manville Corp
Original Assignee
Johns Manville Corp
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 Johns Manville Corp filed Critical Johns Manville Corp
Priority to US57405410A priority Critical patent/US1079404A/en
Application granted granted Critical
Publication of US1079404A publication Critical patent/US1079404A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F16J9/00—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction
    • F16J9/06—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction using separate springs or elastic elements expanding the rings; Springs therefor ; Expansion by wedging
    • F16J9/061—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction using separate springs or elastic elements expanding the rings; Springs therefor ; Expansion by wedging using metallic coiled or blade springs
    • F16J9/063—Strip or wire along the entire circumference

Definitions

  • This invention relates to improvements in the constructionl of packing expanders particularly adapted to be used for expanding the cup leather packings generally used in brake cylinders of air brakes.
  • T he object of the invention is to provide a packing expander which is simple in its construction, eiioient in its operation and which can be easily manufactured.
  • a feature of the present invention is vto construct the expander from sheet metal and entirely with the use of dies, thereby eliminating the above mentioned'constructive ⁇ difshown in Fig. 1.
  • the brake cylinder 2 having the cylinder headl 1 fastened'thereto, is bored to receive the cup leather, or other suitable material, packing ⁇ 5.
  • the packing 5 is thereforecircular. and continuous and is clamped betweenthe piston body/6 yand the plate 3 by means of a series of studs and nuts.
  • the plate 3 is .of an outside diameter somewhat less than theinternal diameter of the cylini drical portionof the cup shaped packing 5,
  • the packing expander rin'g 4 which is preferably constructed of sheet metal, is'J- shaped in cross section.
  • the hooked end or leg of the J When inserted in working position, the hooked end or leg of the J is located in and spans the annular space formed between the packing 5 and the plate 3,- the long leg of the J coacting against the inner surface of the cylindrical portion of the cup shaped packing 5.
  • Thering 4 is expansible and discontinuous by having .its abutting ends formed with projections Y7, I8, thereon.
  • projections are formed by cutting the ends of the ring Z-shape, this cutting being done before producing the lJ formation of the ring 4.
  • the Z-shape of the parting between the ends of the ring lies entirely within the longerv le of the J, the parting at the bend of the being along a single plane.
  • a strip of sheet metal' is first suitably ⁇ formed at its ends and bent to form a cylinder, after which it isl inserted in a cylindrical form having a depression at its lower end which corresponds in shape to the final external shape of the expander ring 4.
  • a die which closely fits the interior surface of the form' and having a projection of a shape corresponding to that of .the interior surface of the ring'4 is inserted within the cylindrical form an is broughtidown against the sheet metal cyl1nder therein. 'As the die approaches the lower part of the form, the cylindrical sheet metal is gradually formed into the ring 4 having the J section as shown.

Description

G. F. DE WEIN.
PACKING EXPANDBR. APPLOATION FILED www/,1910.
Patented Nov.`25, 191.3.
M XN
.Wm-NEEEEE- y sTA'rns PATENT 4orriciz.
anonce r. Dn WEIN, or MILWAUKEE, wisconsin, assIeNon, 'BY MESNE vassialixmms, 'ro H. w. .Tonus-MANVILLE COMPANY, or NEW Yoan, N. Y., a coaroaa- TION F NEW YORK.
' l racninc-nxrannea.
Patented Nov. 25, 1913.
Application med Jury 27, 1910'. serial No. 574,054.
To all whom', it may concern.'
Be it known that I,`GE0RGE F. DE WEIN,
a citizen'ofthe United States, residing at' Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented a certain new and useful Improvement in `Packing- Expanders, of which the following is a specification.
This invention relates to improvements in the constructionl of packing expanders particularly adapted to be used for expanding the cup leather packings generally used in brake cylinders of air brakes.
T he object of the invention is to provide a packing expander which is simple in its construction, eiioient in its operation and which can be easily manufactured.-
In the use of exp-anders in connection with cup yshaped packings it has been found essential to have the expander coact along the entire cylindrical portion of the packing.
Several devices have been constructed in which such coaction has been obtained, but all of these have been diiicult to manufacture since they'lrequire either a special rolled stock or a great deal ofmachinig in their constructio A feature of the present invention is vto construct the expander from sheet metal and entirely with the use of dies, thereby eliminating the above mentioned'constructive`difshown in Fig. 1.
The brake cylinder 2, having the cylinder headl 1 fastened'thereto, is bored to receive the cup leather, or other suitable material, packing `5. The packing 5 is thereforecircular. and continuous and is clamped betweenthe piston body/6 yand the plate 3 by means of a series of studs and nuts. The plate 3 is .of an outside diameter somewhat less than theinternal diameter of the cylini drical portionof the cup shaped packing 5,
and has its peripheral lcorner nearest the piston body 6 cut away, thus forming an. annular space between the packing 5 and the plate 3.'
The packing expander rin'g 4, which is preferably constructed of sheet metal, is'J- shaped in cross section. When inserted in working position, the hooked end or leg of the J is located in and spans the annular space formed between the packing 5 and the plate 3,- the long leg of the J coacting against the inner surface of the cylindrical portion of the cup shaped packing 5. By thus inlserting the ring 4, any possibility of outward slipping of the ring is prevented, due to the coaction of the shortleg of the J with the plate Thering 4 is expansible and discontinuous by having .its abutting ends formed with projections Y7, I8, thereon. These projections are formed by cutting the ends of the ring Z-shape, this cutting being done before producing the lJ formation of the ring 4. The Z-shape of the parting between the ends of the ring lies entirely within the longerv le of the J, the parting at the bend of the being along a single plane.
In forming the ring 4, a strip of sheet metal' is first suitably `formed at its ends and bent to form a cylinder, after which it isl inserted in a cylindrical form having a depression at its lower end which corresponds in shape to the final external shape of the expander ring 4. A die which closely fits the interior surface of the form' and having a projection of a shape corresponding to that of .the interior surface of the ring'4 is inserted within the cylindrical form an is broughtidown against the sheet metal cyl1nder therein. 'As the die approaches the lower part of the form, the cylindrical sheet metal is gradually formed into the ring 4 having the J section as shown. In order to permit thel formation of the ring by means' of adie, itis not desirable to produce at the hooked end of the J section a bend which is over 180 degrees in extent. -It has also been found that a J section in which the legs approach parallelism provides sutliclent stlness to, give the proper expandlng force t'o the ring 4.
It should be understood that it is not dei sired to be limited to the exact details .of
construction shown and described, for ob-l viou's modifications Will occur to a person lip of theJ being on the inside of the ring so 10 skilled in 'the art.
It is claimed and desired to secure by Let- A ters Pat-ent,-
` along one edge so as. to havesJ Jv-shaped cross section, and curved into a circle with abutting but disconnected ends, the shorter formed. v v
In testimony whereof, I afiiX my signature in the presence of two Witnesses.
G. F. DE WEIN.
Witnesses:
W. H. LIEBER, JOHN DAY, Jr.
US57405410A 1910-07-27 1910-07-27 Packing-expander. Expired - Lifetime US1079404A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US57405410A US1079404A (en) 1910-07-27 1910-07-27 Packing-expander.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US57405410A US1079404A (en) 1910-07-27 1910-07-27 Packing-expander.

Publications (1)

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US1079404A true US1079404A (en) 1913-11-25

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US57405410A Expired - Lifetime US1079404A (en) 1910-07-27 1910-07-27 Packing-expander.

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2445882A (en) * 1943-12-10 1948-07-27 Bendix Aviat Corp Sealing means
US2480244A (en) * 1945-11-14 1949-08-30 Int Harvester Co Lifting device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2445882A (en) * 1943-12-10 1948-07-27 Bendix Aviat Corp Sealing means
US2480244A (en) * 1945-11-14 1949-08-30 Int Harvester Co Lifting device

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