US1789698A - Valve for rock drills - Google Patents

Valve for rock drills Download PDF

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Publication number
US1789698A
US1789698A US421164A US42116430A US1789698A US 1789698 A US1789698 A US 1789698A US 421164 A US421164 A US 421164A US 42116430 A US42116430 A US 42116430A US 1789698 A US1789698 A US 1789698A
Authority
US
United States
Prior art keywords
valve
piston
chamber
pressure fluid
pressure
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
US421164A
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English (en)
Inventor
John C Curtis
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.)
Ingersoll Rand Co
Original Assignee
Ingersoll Rand 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.)
Filing date
Publication date
Application filed by Ingersoll Rand Co filed Critical Ingersoll Rand Co
Priority to US421164A priority Critical patent/US1789698A/en
Priority to GB36474/30A priority patent/GB359779A/en
Priority to DE1930553372D priority patent/DE553372C/de
Application granted granted Critical
Publication of US1789698A publication Critical patent/US1789698A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B25D9/14—Control devices for the reciprocating piston
    • B25D9/16—Valve arrangements therefor
    • B25D9/18—Valve arrangements therefor involving a piston-type slide valve

Definitions

  • HIS ATTORNEY or shock which usually takes place in ma Patented Jan. 20, 1931 "-UNITEDSTATES PATENT 'oFF1cE7- I]*- JOHNY'CPCURTIS, or msron, PENNSYLVANIA, nssranon 'ro xnennsonnnann an rm, or JERSEY an NEW EBSE A conromwronor NEW JERSEY I VALVE on nocx nmnns Application med J'anuaryi'lB, 1930; seriarne. 421,164.
  • This invention relates to rock drills, but more particularly to a distributing valve for rockdrills of the fluid actuated type.
  • the objects of the invention are to obtain a quick and positive action of the valve, to
  • FIG. 1 is a sectional elevation of a-rock drillequipped with a valve constructed in accordance with the practice of the invention, thevalve being shown iii-position to supply pressure fluid to the rearward end of the piston chamber
  • V Figure 2 is v a similar view "showing the valve in a position to supply pressure fluid to the front end of the pistonchamber.
  • FIG. 1 designates generally arockd'rill comprising a cylinder B wherein is formed 'a piston chamber C to accommodate a reciprocatory hammer piston D.
  • a piston controlled exhaust port E to afford communication between the piston chamber C and the atmosphere.
  • a suitable closure is provided for the front end of the piston chamber C in the'form of a head F which may also act as a guide for a working implement G shown as extending withits rearward end into the piston chamberto receive the blows ofthe hammer pistonD.
  • a closure is provided for the rearward end of the piston chamberin the form ofa plate H whereon is seated a head block J which in turn serves as a seat for a back head
  • the cylindervB, t ehead F and the elements d ignated by H, J and K form the casing m of the rock drill and such parts may be held in assembled relationship in anysuitablef'and conven ent *nianner, as for instance, usual side bolts (not shown).
  • the valve s m be provided with e recess or cavlty U to reduce its weight; 'Ne'arithe 7 forward end of the valve is an integralflange Vwhich lies in the enlarged portion Q and spaced slightly 'rearwardly of the'fl'ange is another flange W'which also lieswithinyt'he enlarged portion Q.
  • the pressure fluid utilized for impelling thepiston D forwardly is admitted into the in the valve chest O and the ports -X comrearward end of the piston chamber C through a rear inletpassageb in the plate I and coaxially with the valve S,
  • Thepressure fluid utilized for driving the pistonD rearwardly is conveyed to-thelfront end of the piston chamber by a front inlet passage 0 which extends through the cylinder B, the plate H and the head block J and'communicates with the rearward end of the enlarged.
  • ports f in theflange V are a series of ports 6 through which the pressure fluid flows to the rear inletjpassage b andthe pressure fluid supplied to the front inlet passage 10 flows through, ports f in theflange Theports e are preferably of greater area than vthe ports so that a greater amount ofpressure fluid maybe supplied to the rearward end Of: the piston: chamber within a ,given time than to the front end. -This is desirable for the reason that the forward stroke of the piston is the working stroke. Convenient means are provided for actuating the valve S from one limiting position to the-other.
  • the flange'V is provided at its forward end withan annularpressure area 9 against which the pressure fluid flowingthrough the ports a may, act to'throw the valve rearwardly.
  • a pressure area h is formed on'the rearward'end of the flange W so that pressure fluid flowing through the ports f will act thereagainst to throw the valve to its forward limiting position.
  • Thepressure fluid is, suppliedto the actuating surface owby a port 39 in the end wall'Q of the valvewS.
  • valve chamber P isproVijded with an exhaust passage 1 which "leads through the valve chest 0 and the head block to the atmosphere and is controllediby the rear end of the stem: T.
  • TheeX-ha-ust passage r is preferably so locatedthat it will be only uncovered bythe-stem T of the-valve when the valve reaches its foremost'position in the valve chamber P.
  • JASIhB valve Sapproaches itsforemost sition-inthevalve chamber P .theexhaust passage riwillbe uncovered by the stemT ofthe valve and the pressure'fluid which previously acted againstthe actuating surface "96 0 will then be exhausted to the-atmosphere.
  • a fluid actuated rock drill the combination of a cylinder having a piston chamber and a piston in the piston chamber, an exhaust port in the cylinder, a valve chest having a valve chamber, inlet passages leading from the'ends' of the valve chamber to the piston chamber, a valve in the valve chamber having a pair of flanges, annular pressure areas on the flanges, ports in the flanges to supply pressure fluid to the pressure areas for throwing the valve and to supply pressure fluid to the inlet passages, a supply passage in the valve chest to introduce pressure fluid into the valve chamber between the flanges, a hollow stem on the valve and having an end wall to form opposed actuating surfaces, one of said actuating surfaces beingintermittently exposed to compression to assist in I throwing the valve in one direction, and a port in the end wall supplying pressure fluid to the other actuating surface to assist in throwing the valve in the opposite direction.
  • valve chest having a valve chamber, inlet passages leading from the ends of the Valve chamber tothe piston chamber, a valve in the valve chamber having a pair of flanges, annular pressure areas on the flanges, ports in the flanges to supply pressure fluid to the pressure areas for throwing the valve and to supply pressure fluid to the inlet passages.
  • a supply passage in the valve chest to introduce pressure fluid into the valve chamber between theflanges,
  • actuating surfaces being intermittently exposed to compression to assist in throwing the valve in one direction, a port in the end wall to supply pressure fluid from the rear end of the piston chamber to the other actuating surface to assist in throwing the valve in the other direction, and an exhaust port leading from the valve chamber to the atmosphere and controlled by'the stem to exhaust the fluid acting against the last said actuating surface.

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Mechanically-Actuated Valves (AREA)
US421164A 1930-01-16 1930-01-16 Valve for rock drills Expired - Lifetime US1789698A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US421164A US1789698A (en) 1930-01-16 1930-01-16 Valve for rock drills
GB36474/30A GB359779A (en) 1930-01-16 1930-12-03 Improvements in valve for rock drills
DE1930553372D DE553372C (de) 1930-01-16 1930-12-13 Einlasssteuerung fuer Pressluft-Gesteinsbohrmaschinen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US421164A US1789698A (en) 1930-01-16 1930-01-16 Valve for rock drills

Publications (1)

Publication Number Publication Date
US1789698A true US1789698A (en) 1931-01-20

Family

ID=23669430

Family Applications (1)

Application Number Title Priority Date Filing Date
US421164A Expired - Lifetime US1789698A (en) 1930-01-16 1930-01-16 Valve for rock drills

Country Status (3)

Country Link
US (1) US1789698A (de)
DE (1) DE553372C (de)
GB (1) GB359779A (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2788768A (en) * 1954-05-12 1957-04-16 Chicago Pneumatic Tool Co Distributing valve arrangement for chipping hammer
US3005443A (en) * 1960-02-29 1961-10-24 Ingersoll Rand Co Rock drill

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3284961A (en) * 1964-05-25 1966-11-15 Buehler Ltd Polishing device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2788768A (en) * 1954-05-12 1957-04-16 Chicago Pneumatic Tool Co Distributing valve arrangement for chipping hammer
US3005443A (en) * 1960-02-29 1961-10-24 Ingersoll Rand Co Rock drill

Also Published As

Publication number Publication date
GB359779A (en) 1931-10-29
DE553372C (de) 1932-06-24

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