US2277713A - Thread protector - Google Patents

Thread protector Download PDF

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Publication number
US2277713A
US2277713A US294013A US29401339A US2277713A US 2277713 A US2277713 A US 2277713A US 294013 A US294013 A US 294013A US 29401339 A US29401339 A US 29401339A US 2277713 A US2277713 A US 2277713A
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US
United States
Prior art keywords
protector
thread
threaded
thread protector
outlet
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
US294013A
Inventor
Arthur L Parker
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Individual
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Individual
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Publication date
Application filed by Individual filed Critical Individual
Priority to US294013A priority Critical patent/US2277713A/en
Application granted granted Critical
Publication of US2277713A publication Critical patent/US2277713A/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
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L57/00—Protection of pipes or objects of similar shape against external or internal damage or wear
    • F16L57/005—Protection of pipes or objects of similar shape against external or internal damage or wear specially adapted for the ends of pipes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D59/00—Plugs, sleeves, caps, or like rigid or semi-rigid elements for protecting parts of articles or for bundling articles, e.g. protectors for screw-threads, end caps for tubes or for bundling rod-shaped articles
    • B65D59/02—Plugs
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S411/00—Expanded, threaded, driven, headed, tool-deformed, or locked-threaded fastener
    • Y10S411/904—Fastener or fastener element composed of nonmetallic material
    • Y10S411/907—Elastomeric

Definitions

  • This invention relates to a thread protector and more particularly to a molded rubber protector for female threads.
  • strainers, primers, and the like are provided with female pipe thread connections.
  • female pipe thread connections Theretofore, during the shipping of such parts or while they are lying in stock, it has been customary to screw metal pipe plugs into these connections to prevent the entry of dirt, dust and the like, and also to protect the threads from damage.
  • the parts so protected are generally of sufficient value to warrant the additional cost of the above described protecting plugs.
  • cheaper parts, such as fittings are seldom provided with protecting plugs since the original cost of the fittings is often not a whole lot more than the lost of the plug.
  • metal protecting plugs are sometimes objectionable be cause there is always the possibility that the persons handling the parts may unwittingly screw them in too tight, or without a lubricant, and cause the plug to Efreeze within the boss. This is especially true with aluminum alloy parts.
  • the primary object of the present invention is to provide an improved thread protector which overcomes the above defined defects. 1 v
  • a further object of the present invention is to provide a protectorthat is inexpensive to manufacture and can, therefore, be more widely used.
  • a still further object of the present invention is to provide a thread protector that can be easily inserted and removed with the fingers at all times and that during such operation no damage is done to the threads.
  • Figure 1 is a transver e sectional view of the thread protector as applied to a threaded part.
  • Figure 2 is a transverse sectional view showing how the annular head on the protector will cross the thread.
  • Figure 3 is an end view of the protector.
  • Figure 4 is a side view thereof.
  • Figure 5 is a side view of a protector showing a slightly modifledform of the invention.
  • numeral G designates a threaded element representative of any female threaded member to which a protector I is to be applied.
  • the threaded element 6 includes threaded portion 8 and an upper face 9.
  • the protector I formed of molded rubber or like flexible material, comprises a cylindrical portion Ill having a bead H at its lower end.
  • the cylindrical portion I is hollowed out at l2 and closed at its upper end by a wall [3.
  • the wall I3 has its outer face crown shaped and is provided with a pair of ribs l which provide a finger grip for turning the protector into and out of the threaded boss.
  • the wall l3 also includes a flange M which bears against face 9 of the threaded element and limits the inner movement of the protector.
  • a plurality of serrations IB are provided along the edge of the crown portion to further aid in the manipulation of the protector.
  • the bead is formed parallel to the under surface of flange I 4. Since the thread on the threaded member is helical. the bead cannot follow the thread on the entire diameter but due to its flexibility will cross the thread as seen in Fig. 2. This cross threading does no harm to the protector and-actually increases the locking friction to prevent the protector from jarring or vibrating itself loose.
  • a thread protector for an internally threaded outlet comprising a body portion formed wholly from resilient material, said body portion being of uniform diameter and of substantially the same diameter as the inner diameter of the threaded outlet, said bodyportion being hollow and closed at its outer end and provided with a projecting flange which overlies and contacts with the end of the outlet, said body portion having a projecting rib on the exterior thereof and at the inner end of the body, said ribencircling the body and being of a width so as to fitbetween the threads of the outlet for holding the protector in the outlet with the flange in contact with the end of the outlet.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)

Description

March 32,1942. A, L, P RKE 2,2??313 THREAD PROTECTOR Filed Sept. 8, 1959 Patented Mar. 31, 1942 UNITED STATES PATENT OFFICE 1 Claim.
This invention relates to a thread protector and more particularly to a molded rubber protector for female threads.
Many units such as pipes, valves, pumps,
strainers, primers, and the like are provided with female pipe thread connections. Heretofore, during the shipping of such parts or while they are lying in stock, it has been customary to screw metal pipe plugs into these connections to prevent the entry of dirt, dust and the like, and also to protect the threads from damage. The parts so protected are generally of sufficient value to warrant the additional cost of the above described protecting plugs. However, cheaper parts, such as fittings, are seldom provided with protecting plugs since the original cost of the fittings is often not a whole lot more than the lost of the plug.
In addition to their high initial cost, metal protecting plugs are sometimes objectionable be cause there is always the possibility that the persons handling the parts may unwittingly screw them in too tight, or without a lubricant, and cause the plug to Efreeze within the boss. This is especially true with aluminum alloy parts.
Accordingly, the primary object of the present invention is to provide an improved thread protector which overcomes the above defined defects. 1 v
A further object of the present invention is to provide a protectorthat is inexpensive to manufacture and can, therefore, be more widely used.
A still further object of the present invention is to provide a thread protector that can be easily inserted and removed with the fingers at all times and that during such operation no damage is done to the threads.
Other objects and advantages of the present invention will be. apparent from the following description taken in connection with the accompanying drawing wherein:
Figure 1 is a transver e sectional view of the thread protector as applied to a threaded part.
Figure 2 is a transverse sectional view showing how the annular head on the protector will cross the thread.
Figure 3 is an end view of the protector.
Figure 4 is a side view thereof. I
Figure 5 is a side view of a protector showing a slightly modifledform of the invention.
Referring to the drawing in detail wherein like numerals designate like parts throughout the several views, numeral G-designates a threaded element representative of any female threaded member to which a protector I is to be applied. The threaded element 6 includes threaded portion 8 and an upper face 9. The protector I formed of molded rubber or like flexible material, comprises a cylindrical portion Ill having a bead H at its lower end. The cylindrical portion I is hollowed out at l2 and closed at its upper end by a wall [3.
The wall I3 has its outer face crown shaped and is provided with a pair of ribs l which provide a finger grip for turning the protector into and out of the threaded boss. The wall l3 also includes a flange M which bears against face 9 of the threaded element and limits the inner movement of the protector. A plurality of serrations IB are provided along the edge of the crown portion to further aid in the manipulation of the protector.
As seen in Fig. 4, the bead is formed parallel to the under surface of flange I 4. Since the thread on the threaded member is helical. the bead cannot follow the thread on the entire diameter but due to its flexibility will cross the thread as seen in Fig. 2. This cross threading does no harm to the protector and-actually increases the locking friction to prevent the protector from jarring or vibrating itself loose.
In Figure 5 I have shown a slightly modified form of the protector wherein the lower end of the cylindrical wall portion is provided with a threaded portion il in place of the bead ll shown in the preferred form. In all other re- A thread protector for an internally threaded outlet, comprising a body portion formed wholly from resilient material, said body portion being of uniform diameter and of substantially the same diameter as the inner diameter of the threaded outlet, said bodyportion being hollow and closed at its outer end and provided with a projecting flange which overlies and contacts with the end of the outlet, said body portion having a projecting rib on the exterior thereof and at the inner end of the body, said ribencircling the body and being of a width so as to fitbetween the threads of the outlet for holding the protector in the outlet with the flange in contact with the end of the outlet.
ARTHUR L. PARKER.
US294013A 1939-09-08 1939-09-08 Thread protector Expired - Lifetime US2277713A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US294013A US2277713A (en) 1939-09-08 1939-09-08 Thread protector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US294013A US2277713A (en) 1939-09-08 1939-09-08 Thread protector

Publications (1)

Publication Number Publication Date
US2277713A true US2277713A (en) 1942-03-31

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Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2737205A (en) * 1952-08-28 1956-03-06 Fullerton Mfg Company Means for protectively isolating internal pipe surfaces
US2842282A (en) * 1951-06-22 1958-07-08 American Flange & Mfg Container closure and combinations
US2900103A (en) * 1955-02-08 1959-08-18 American Flange & Mfg Closure combination and elements thereof
US3056427A (en) * 1959-10-14 1962-10-02 Edward F Higgins Impact absorbing protector for internally threaded pipe ends
DE1185877B (en) * 1956-10-29 1965-01-21 Edward Francis Higgins Protective device for pipe ends provided with external threads
US3287687A (en) * 1964-08-17 1966-11-22 James R Mosher Protectors for electrical connectors
US3578200A (en) * 1969-11-03 1971-05-11 Gti Corp Port protectors
US4194770A (en) * 1978-03-01 1980-03-25 Eaton Corporation Compression fitting
EP0662428A1 (en) * 1994-01-05 1995-07-12 Kvaerner Rosenberg A/S End plug for pipe flanges
US6029683A (en) * 1997-05-16 2000-02-29 U-Haul International, Inc. Pressurized gas tank valve plug
US6092968A (en) * 1998-05-29 2000-07-25 Mcgard, Inc. Fastener structure
US20040009051A1 (en) * 2002-07-12 2004-01-15 Roberts Bruce R. Crown fastener and method for using
US20050263201A1 (en) * 2004-05-21 2005-12-01 Gabe Coscarella Closure for a plumbing cleanout
US20110120924A1 (en) * 2009-11-20 2011-05-26 Gabe Coscarella Drain cover with locking mechanism
US8733404B2 (en) * 2012-09-04 2014-05-27 Protective Industries, Inc. Threaded plug for hammer union and assembly thereof
US20170254440A1 (en) * 2013-03-15 2017-09-07 Todd Grose Valve box system

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2842282A (en) * 1951-06-22 1958-07-08 American Flange & Mfg Container closure and combinations
US2737205A (en) * 1952-08-28 1956-03-06 Fullerton Mfg Company Means for protectively isolating internal pipe surfaces
US2900103A (en) * 1955-02-08 1959-08-18 American Flange & Mfg Closure combination and elements thereof
DE1185877B (en) * 1956-10-29 1965-01-21 Edward Francis Higgins Protective device for pipe ends provided with external threads
US3056427A (en) * 1959-10-14 1962-10-02 Edward F Higgins Impact absorbing protector for internally threaded pipe ends
US3287687A (en) * 1964-08-17 1966-11-22 James R Mosher Protectors for electrical connectors
US3578200A (en) * 1969-11-03 1971-05-11 Gti Corp Port protectors
US4194770A (en) * 1978-03-01 1980-03-25 Eaton Corporation Compression fitting
EP0662428A1 (en) * 1994-01-05 1995-07-12 Kvaerner Rosenberg A/S End plug for pipe flanges
US6029683A (en) * 1997-05-16 2000-02-29 U-Haul International, Inc. Pressurized gas tank valve plug
US6092968A (en) * 1998-05-29 2000-07-25 Mcgard, Inc. Fastener structure
US6357981B1 (en) 1998-05-29 2002-03-19 Mcgard, Inc. Fastener structure
US20040009051A1 (en) * 2002-07-12 2004-01-15 Roberts Bruce R. Crown fastener and method for using
US20050263201A1 (en) * 2004-05-21 2005-12-01 Gabe Coscarella Closure for a plumbing cleanout
US7762282B2 (en) * 2004-05-21 2010-07-27 Gabe Coscarella Closure for a plumbing cleanout
US20110120924A1 (en) * 2009-11-20 2011-05-26 Gabe Coscarella Drain cover with locking mechanism
US20110168711A1 (en) * 2009-11-20 2011-07-14 Gabe Coscarella Drain cover with locking mechanism
US8894850B2 (en) 2009-11-20 2014-11-25 Gabe Coscarella Drain cover with locking mechanism
US9009876B2 (en) 2009-11-20 2015-04-21 Gabe Coscarella Drain cover with locking mechanism
US8733404B2 (en) * 2012-09-04 2014-05-27 Protective Industries, Inc. Threaded plug for hammer union and assembly thereof
US20170254440A1 (en) * 2013-03-15 2017-09-07 Todd Grose Valve box system

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