US1823419A - Swedged end push rod - Google Patents

Swedged end push rod Download PDF

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Publication number
US1823419A
US1823419A US474230A US47423030A US1823419A US 1823419 A US1823419 A US 1823419A US 474230 A US474230 A US 474230A US 47423030 A US47423030 A US 47423030A US 1823419 A US1823419 A US 1823419A
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US
United States
Prior art keywords
push rod
end push
cam follower
swedged
swedged end
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
US474230A
Inventor
John O Almen
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.)
General Motors Research Corp
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General Motors Research 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.)
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Publication date
Application filed by General Motors Research Corp filed Critical General Motors Research Corp
Priority to US474230A priority Critical patent/US1823419A/en
Application granted granted Critical
Publication of US1823419A publication Critical patent/US1823419A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/14—Tappets; Push rods
    • F01L1/146—Push-rods
    • 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
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49229—Prime mover or fluid pump making
    • Y10T29/49295—Push rod or rocker arm making

Definitions

  • This invention has to do with push rods used on internal combustion engines to transmit thrust yin valve operating gear. It has therefore been proposed to make such push rods in the form of hollow tubes provided at their ends with ball shaped fittings for cooperation with the sockets in the rocker or cam follower. Such rods are preferable to solid rods because of reduction in weight, but the fittings must be separately manufactured and secured to the tube, increasing the cost of manufacture. Y y
  • the push rods are made of tubular stock, slightly longer lthan required, and the excess metal is spun or formed over to provide spherical bearing surfaces; In some cases it may alsobe 'desirable to form an annular shoulder at the end of the rod to form a seat for the spring used to hold the push rod in its socket.
  • D Figure 2 is a vertical section through the push rod.
  • Figure 3 is a fragmentary section through the lower end of a modified form of push rod and its cam follower.
  • 10 indicates a portion of the cylinder of an internal combustion engine.
  • the usual intake and exhaust valves one of which is indicated at 12, held upon its seat by the usual coil spring 14.
  • the valve is opened by means of the cam 16, pushing upward the cam follower 18, and push rod 420 to rock the rocker 22, the rocker moving the valve away from its seat.
  • Theimproved push rod 20, shown in detail in Figure 2 is made of tubular stock alittlelonger than the finished rod, as indicated by the dotted lines 21 in Figure 2.
  • the ends of the rod are provided with spherical surfaces to engage the socket 23 formed in the stud 24 secured in the end of the rocker 22, and the socket 26 formed in the cam follower 18.
  • the spherical ends are' made by spinning or by die-forming the ends of the tube. This operation results in slightly thickening the ends of the push rod as indicated on the drawmg.
  • a push rod in the form of a hollow cylindrical tube having one end formed outwardly and then inwardly to provide an annular seat, the walls of the tube at the extreme end having converged inwardly to provide a circumferentially continuous spherical end.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Description

Sept. l5, 1931. 1. o. ALMEN swEDGED END PUSH Ron Filed Aug'. 9, 1950 Patented Slept. 15, 1931v UNITED STATES PATENT OFFICE ,JOI-IN O. lALMEN, 0F ROYAL OAK, MICHIGAN, ASSIGNOR T0 GENERAL MOTORS RE- f SEARCH CORPORATION, 0F DETROIT, MICHIGAN, A CORPORATION OF DELAWARE SWEDGED END PUSH ROD Application iled August 9, 1930. Serial No. 474,230.
This invention has to do with push rods used on internal combustion engines to transmit thrust yin valve operating gear. It has therefore been proposed to make such push rods in the form of hollow tubes provided at their ends with ball shaped fittings for cooperation with the sockets in the rocker or cam follower. Such rods are preferable to solid rods because of reduction in weight, but the fittings must be separately manufactured and secured to the tube, increasing the cost of manufacture. Y y
According to my invention the push rods are made of tubular stock, slightly longer lthan required, and the excess metal is spun or formed over to provide spherical bearing surfaces; In some cases it may alsobe 'desirable to form an annular shoulder at the end of the rod to form a seat for the spring used to hold the push rod in its socket.
In Figure 1 I have shown a vertical section through a portion of an engine having my improved push rod incorporated in the valve Oear.
D Figure 2 is a vertical section through the push rod.
Figure 3 is a fragmentary section through the lower end of a modified form of push rod and its cam follower.
In Figure 1, 10 indicates a portion of the cylinder of an internal combustion engine. In the head of the cylinder are mounted the usual intake and exhaust valves, one of which is indicated at 12, held upon its seat by the usual coil spring 14. The valve is opened by means of the cam 16, pushing upward the cam follower 18, and push rod 420 to rock the rocker 22, the rocker moving the valve away from its seat.
Theimproved push rod 20, shown in detail in Figure 2, is made of tubular stock alittlelonger than the finished rod, as indicated by the dotted lines 21 in Figure 2. The ends of the rod are provided with spherical surfaces to engage the socket 23 formed in the stud 24 secured in the end of the rocker 22, and the socket 26 formed in the cam follower 18. The spherical ends are' made by spinning or by die-forming the ends of the tube. This operation results in slightly thickening the ends of the push rod as indicated on the drawmg.
In the modification shown on Figure 3, I have shown the lower end of the push rod formed to provide an annular shoulder 30. A spring 31 between the shoulder and the end of the guide 32 for the cam follower 18 holds the end of the push rod in the socket in the 1 cam follower and also causes the cam follower stantially closed spherical end, the walls of the tube at said end being circumferentially continuous.
3. A push rod in the form of a hollow cylindrical tube having one end formed outwardly and then inwardly to provide an annular seat, the walls of the tube at the extreme end having converged inwardly to provide a circumferentially continuous spherical end.
In testimony whereof I aiix my signature.y
JOHN O. ALMEN.
CERTIFICATE OF CORRECTION.
Patent No. 1,823,419. September l5, 1951.
JOHN O. ALMEN.
lt is herebyoertiiied that error appears in the printed specification of the above numbered patent requiring; correction as follows: Page l, line '79, claim 5, for "having" read being; and. that the said Letters Patent should be read with this correction therein that the same may conform to the record of the oase in the Patent Office.
Signed and sealed this 21st day of January, A. D. 1936.
I Leslie Frazer ('Seal) Acting Commissioner of Patents.
US474230A 1930-08-09 1930-08-09 Swedged end push rod Expired - Lifetime US1823419A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US474230A US1823419A (en) 1930-08-09 1930-08-09 Swedged end push rod

Applications Claiming Priority (1)

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US474230A US1823419A (en) 1930-08-09 1930-08-09 Swedged end push rod

Publications (1)

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US1823419A true US1823419A (en) 1931-09-15

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US474230A Expired - Lifetime US1823419A (en) 1930-08-09 1930-08-09 Swedged end push rod

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2434080A (en) * 1945-11-05 1948-01-06 Leonard J Rosa Push rod
US2891525A (en) * 1955-08-01 1959-06-23 Thompson Ramo Wooldridge Inc Tappet barrel
US3050045A (en) * 1960-02-12 1962-08-21 Bundy Tubing Co Push rod structure and method of manufacture
US3094107A (en) * 1960-07-15 1963-06-18 Bundy Tubing Co Push rod structure
US3165174A (en) * 1961-03-30 1965-01-12 Bendix Corp Brake thrust link
DE1209802B (en) * 1960-02-12 1966-01-27 Bundy Tubing Co Push rod for the valve drive of internal combustion engines
US3908615A (en) * 1973-09-06 1975-09-30 Norman G Hayward Ball ended push rod with controlled oil flow
US4850315A (en) * 1988-05-27 1989-07-25 The Budd Company Push rod
US5027763A (en) * 1989-12-05 1991-07-02 Mall Tooling And Engineering One-piece push rod having enlarged spherical seat
US5069173A (en) * 1989-12-05 1991-12-03 Mall Tooling And Engineering Push rod having irregularly shaped internal bore
US5492085A (en) * 1994-12-13 1996-02-20 S & S Cycle, Inc. Supported pushrod for internal combustion engines

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2434080A (en) * 1945-11-05 1948-01-06 Leonard J Rosa Push rod
US2891525A (en) * 1955-08-01 1959-06-23 Thompson Ramo Wooldridge Inc Tappet barrel
US3050045A (en) * 1960-02-12 1962-08-21 Bundy Tubing Co Push rod structure and method of manufacture
DE1209802B (en) * 1960-02-12 1966-01-27 Bundy Tubing Co Push rod for the valve drive of internal combustion engines
US3094107A (en) * 1960-07-15 1963-06-18 Bundy Tubing Co Push rod structure
US3165174A (en) * 1961-03-30 1965-01-12 Bendix Corp Brake thrust link
US3908615A (en) * 1973-09-06 1975-09-30 Norman G Hayward Ball ended push rod with controlled oil flow
US4850315A (en) * 1988-05-27 1989-07-25 The Budd Company Push rod
US5027763A (en) * 1989-12-05 1991-07-02 Mall Tooling And Engineering One-piece push rod having enlarged spherical seat
US5069173A (en) * 1989-12-05 1991-12-03 Mall Tooling And Engineering Push rod having irregularly shaped internal bore
US5492085A (en) * 1994-12-13 1996-02-20 S & S Cycle, Inc. Supported pushrod for internal combustion engines

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