US2273095A - Internal combustion hammer - Google Patents

Internal combustion hammer Download PDF

Info

Publication number
US2273095A
US2273095A US289547A US28954739A US2273095A US 2273095 A US2273095 A US 2273095A US 289547 A US289547 A US 289547A US 28954739 A US28954739 A US 28954739A US 2273095 A US2273095 A US 2273095A
Authority
US
United States
Prior art keywords
piston
hammer
chamber
cage
internal combustion
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
US289547A
Other languages
English (en)
Inventor
Clifford E Fitch
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.)
Chicago Pneumatic Tool Co LLC
Original Assignee
Chicago Pneumatic Tool Co LLC
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 Chicago Pneumatic Tool Co LLC filed Critical Chicago Pneumatic Tool Co LLC
Priority to US289547A priority Critical patent/US2273095A/en
Priority to GB5528/40A priority patent/GB534601A/en
Priority to FR865145D priority patent/FR865145A/fr
Priority to CH219228D priority patent/CH219228A/fr
Priority to DEC55853D priority patent/DE705857C/de
Application granted granted Critical
Publication of US2273095A publication Critical patent/US2273095A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B27/00—Placing, renewing, working, cleaning, or taking-up the ballast, with or without concurrent work on the track; Devices therefor; Packing sleepers
    • E01B27/12—Packing sleepers, with or without concurrent work on the track; Compacting track-carrying ballast
    • E01B27/13—Packing sleepers, with or without concurrent work on the track
    • E01B27/14—Manual tools or hand-held power tools therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D9/00—Portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
    • B25D9/06—Means for driving the impulse member
    • B25D9/10—Means for driving the impulse member comprising a built-in internal-combustion engine

Definitions

  • the invention has a particular reference .to the use of a free hammer piston with. a two-cycle internal combustion engine of the double acting type; namely, one that has a single driving piston and an explosion or combustion chamber adjacent each endgof the. driving pis ton.
  • a double acting engine has many. advantages over the single acting type, but'the principal advantage is gained by the elimination of the usual quent replacementdue to breakage and, moreover, reduces the efliciency and power of the engine by absorbing energy when compressed during the power stroke ofthe piston.
  • the length of stroke of the piston is not uniform due to the fact that the g implementat the time of spring permits such variations in length of stroke.
  • the use, in adouble acting engine, of ignited gas to return the piston in a double acting engine, of ignited gas to return the piston, in
  • timing mechanism is regulated for a; short stroke the ior'ce of blow is frequently too' weak,
  • One object of the invention is to increase the, efliciency and adaptability of a percussive toolby
  • Fig. 1 is .a longitudinal section through a tie' temper embodying the mechanism of the invention, e driving piston being in its uppermost spring for returning the driving piston through its compression stroke. Thisspring requires freposition, certain of the ignition apparatus being shown schematically;
  • V Fig. 2 is an enlarged view of the upper section of- Fig. 1; I
  • Fige3 is a view similar to Fig. 2, showing the driving piston indescending position
  • Fig. 4 is an enlarged view of the lower section of .the tool, showing the hammer assemblyindescendingposition
  • Fig. 5 is a view similar to Figs. 2 and 3, showing the driving piston at the end of its descending stroke;
  • Fig. 6 is a view similar to Fig. 4, but showing the hammer assembly at the time that the driving piston is; at the end of its descending stroke;
  • the tool maybe considered as consisting of two cooperating sections which form the opposite, or upper and lower, ends of the tool.
  • the upper end of the tool is constructed as an internal combustion engine and the lower end as a support and guide for the impact delivering elements.
  • the-chief. supporting elements of the tool are a pairof cylinders 8 and 9, at the upper end, and a downwardly extending barrel Lat the lower end.
  • Movable within the'cylinders 8 and 9 is a driving piston liformed with a connection rod l2 which extends downward into the barrel II and rigidly connects the piston to a cylindrical lower end of the barrel I and by an extension l6 secured to the barrel by bolts H.
  • a bushing l8 for the bar I is supported inside the extension
  • a cushioning assembly is positioned atop the bushing l8.
  • This assembly comprises a cushion l9 made of rubber or similar material, a retaining ring 2
  • Opening into explosion chambers 21 and 28 are passageways 29 and 3
  • tive exhaust ports 32 and 33 are also provided in each combustion chamber to permit the escape of burned gases.
  • contained in respective housings 40 and 42 are provided for controlling the flow of the explosive mixture into .the passageways 29 and 3
  • the valve is of the poppet type and is urged by a spring 43 into the position shown-in Fig.
  • valve 2 where it acts to close the valve opening '44 leading into a passageway 29 or 3
  • Access to atmosphere is obtained through the valve housing by means of ports 45, and gasoline is directed to the valve openingfrom a tank (not shown) through a passage 46 com- 'municating with inlet 41;
  • a set screw or metering valve 48 is provided for regulating the now of liquid fuel through'passage 46.
  • have been shown in their present positions principally to :mplify the disclosure. In the actual construction of the machine the valves may occupy the positions shown buta preferred arrang'ementis to have the valves side by side and approximately from the positions shown.
  • the ignitionsystem used in conjunction with the engine may be energized from an outside source such as a battery 53 (Fig.2) Individual coils C--
  • the armature In the latter construction a single metering. valve 48, common to both valves, may be used, al-
  • the lever 55 is arranged for cooperation with a stud 6
  • projects through a longitudinal opening 60 cut in the barrel I0.
  • is formed with separate inclined surfaces 55Aand 563 which converge to a low point adjacent the pivot point 51.
  • engages the upper end of inclined surface 56A to hold the lever 56 rocked against the tension of spring 58 to close the circuit through coil C'-I to plug 49 and cause an explosion in upper chamber 21.
  • the driving piston descends, the stud 6
  • Any suitable means may be used to start the engine.
  • One such means is .shown here and comprises a manually operable plunger 63 extending downward through the upper end of the cylinder 8 and into the chamber 21.
  • the lower end of plunger 63 is formed with a pin 63a (Fig.
  • the hammer assembly comprises,'as before mentioned, the cylindrical cage I3 and the hammer piston I4 positioned within the cage and movable relatively thereto.
  • the principle of free piston hammers is old and well known in the art and a variety of practical embodiments thereof may be produced.
  • the cage I3 is formed with shoulders 68 which engage the inner surface of the barrel III to hold the cage against lateral movement as it reciprocates with the driving piston II. formed with a head fitting snugly against the inner wall of the cage, and a stem or extension which passes through the lower end of-the cage in position to strike the tamping bar I5.
  • the cage I3 is closed at its upper end and sealed at its lower end by the passage of the hammer piston I4 therethrough.
  • a slot or slots 68 slightly longer than the head of hammer piston I4, are cut in the cage at its mid point in order that the mean pressures on opposite ends of the piston head may be approximately equal to each other and to atmospheric pressure.
  • the upper and lower ends of the cage form respective air cushions or chambers II and 12.
  • a the cage descends relative to the hammer piston the air in upper chamber II is compressed and drives the piston I I downward to strike the bar I5.
  • the air in lower chamber. I2 is compressed and tends to return the piston to ,its Fig. 1 position.
  • the piston I4 first completes its upward movement, and then starts down but, due to its inertia, ata slower instantaneous speed than the cage I3.
  • the size of the air pocket II decreases, as will be apparent from a comparison between Figs. v2 and 4.
  • the compressed air in pocket H expands, causing the hammer piston to move at a much greater speed than the cage I3.
  • the hammer piston I 4 strikes the bar I5
  • An internal combustion hammer comprising a cylinder having a combustion chamber formed at each end thereof, a hammer barrel secured to one end of said cylinder and axially aligned therewith, a working tool supported at the outer end of said hammer barrel, a .driving piston reciprocable within said cylinder, a hammer assembly within said barrel'including a reciprocable cylindrical cage and a floating piston therein arranged to deliver impacts to said working tool, an ignition system including a contact element adapted when set in one position to cause an explosion in one of said combustion chambers I and when set in another position to cause an explosion in the other of said combustion chambers, a connection between said driving piston and said cylindrical cage, and means comprised CLIFFORD E. FITCH.
  • the hammer piston I4 is'

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Percussive Tools And Related Accessories (AREA)
US289547A 1939-08-11 1939-08-11 Internal combustion hammer Expired - Lifetime US2273095A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US289547A US2273095A (en) 1939-08-11 1939-08-11 Internal combustion hammer
GB5528/40A GB534601A (en) 1939-08-11 1940-03-27 Internal combustion hammer
FR865145D FR865145A (fr) 1939-08-11 1940-04-25 Marteau à moteur à combustion interne
CH219228D CH219228A (fr) 1939-08-11 1940-05-03 Outil à percussion.
DEC55853D DE705857C (de) 1939-08-11 1940-06-11 Hammeraggregat

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US289547A US2273095A (en) 1939-08-11 1939-08-11 Internal combustion hammer

Publications (1)

Publication Number Publication Date
US2273095A true US2273095A (en) 1942-02-17

Family

ID=23112005

Family Applications (1)

Application Number Title Priority Date Filing Date
US289547A Expired - Lifetime US2273095A (en) 1939-08-11 1939-08-11 Internal combustion hammer

Country Status (5)

Country Link
US (1) US2273095A (fr)
CH (1) CH219228A (fr)
DE (1) DE705857C (fr)
FR (1) FR865145A (fr)
GB (1) GB534601A (fr)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2480879A (en) * 1944-06-22 1949-09-06 John V Rice Jr Corp Power actuated percussion tool
US2533487A (en) * 1946-08-15 1950-12-12 Chicago Pneumatic Tool Co Gas hammer
US2609813A (en) * 1946-08-15 1952-09-09 Chicago Pneumatic Tool Co Gas hammer
US2691967A (en) * 1949-09-09 1954-10-19 Bell Noel Gonne Pile hammer and like percussion machine
US2877750A (en) * 1957-05-29 1959-03-17 Olin Mathieson Hammer and buffer mechanism
US2982271A (en) * 1956-04-23 1961-05-02 Ralph M Heintz Hot gas producer of the freee-piston type and method for starting and operating the same
US3053342A (en) * 1959-03-18 1962-09-11 Mansoff Arthur Percival Internal combustion engine
US3827410A (en) * 1971-12-13 1974-08-06 S Fredin Method for accomplishing a high driving force at a combustion gas driven impact device and an impact device for carrying out of said method
US3834469A (en) * 1972-11-14 1974-09-10 Wacker Werke Kg Internal combustion operated hammer
US4829958A (en) * 1985-12-30 1989-05-16 Institut Francais Du Petrole Device and method for introducing pressurized gas into a combustion chamber of a reciprocating internal combustion engine
US20100101816A1 (en) * 2007-07-03 2010-04-29 Johan Bram Fuel-powered rock breaker
CN120867147A (zh) * 2024-12-11 2025-10-31 安阳市京源铁路设备有限公司 一种便于拆装的内燃捣固镐

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE839480C (de) * 1949-05-31 1952-05-19 Gotthilf Schulin Brennkraftschlagwerkzeug
RU2287632C1 (ru) * 2005-04-25 2006-11-20 Владимир Викторович Бирюлин Электрошпалоподбойка
FR3029217B1 (fr) * 2014-11-27 2019-05-17 Societe Turripinoise De Mecanique Sa Outil pour le bourrage de ballast equipe d’un deflecteur

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2480879A (en) * 1944-06-22 1949-09-06 John V Rice Jr Corp Power actuated percussion tool
US2533487A (en) * 1946-08-15 1950-12-12 Chicago Pneumatic Tool Co Gas hammer
US2609813A (en) * 1946-08-15 1952-09-09 Chicago Pneumatic Tool Co Gas hammer
US2691967A (en) * 1949-09-09 1954-10-19 Bell Noel Gonne Pile hammer and like percussion machine
US2982271A (en) * 1956-04-23 1961-05-02 Ralph M Heintz Hot gas producer of the freee-piston type and method for starting and operating the same
US2877750A (en) * 1957-05-29 1959-03-17 Olin Mathieson Hammer and buffer mechanism
US3053342A (en) * 1959-03-18 1962-09-11 Mansoff Arthur Percival Internal combustion engine
US3827410A (en) * 1971-12-13 1974-08-06 S Fredin Method for accomplishing a high driving force at a combustion gas driven impact device and an impact device for carrying out of said method
US3834469A (en) * 1972-11-14 1974-09-10 Wacker Werke Kg Internal combustion operated hammer
US4829958A (en) * 1985-12-30 1989-05-16 Institut Francais Du Petrole Device and method for introducing pressurized gas into a combustion chamber of a reciprocating internal combustion engine
US20100101816A1 (en) * 2007-07-03 2010-04-29 Johan Bram Fuel-powered rock breaker
US8967290B2 (en) * 2007-07-03 2015-03-03 Construction Tools Pc Ab Fuel-Powered rock breaker
CN120867147A (zh) * 2024-12-11 2025-10-31 安阳市京源铁路设备有限公司 一种便于拆装的内燃捣固镐

Also Published As

Publication number Publication date
DE705857C (de) 1941-05-12
FR865145A (fr) 1941-05-14
CH219228A (fr) 1942-01-31
GB534601A (en) 1941-03-11

Similar Documents

Publication Publication Date Title
US2273095A (en) Internal combustion hammer
US3320740A (en) Press
US2093634A (en) Diesel power hammer
US3255832A (en) Vibrationless percussive tool
US3012549A (en) Internal combustion device
US2402920A (en) Striking device
US1382821A (en) Power-hammer
US2162416A (en) Internal combustion tool
US779116A (en) Gas-engine.
US1029929A (en) Internal-combustion engine.
US2446830A (en) Percussive apparatus
RU2542708C1 (ru) Двигатель внутреннего сгорания для инструментов ударного действия
US2275285A (en) Internal combustion percussive hammer
US1872761A (en) Engine
US3120220A (en) Generator
US2027080A (en) Percussive tool such as hammers and pile drivers
US3159149A (en) Air supply and control system for free-piston engine
US2579075A (en) Power hammer
US2216641A (en) Timer for internal combustion hammers
US1629928A (en) pescara
US1666630A (en) Motor-compressor apparatus
US1755361A (en) Mechanical hammer
US1361648A (en) Internal-combustion engine
US1293766A (en) Internal-combustion engine.
US2225531A (en) Drill rotating device