US1053093A

US1053093A - Pressure-actuated tool.

Info

Publication number: US1053093A
Application number: US634281A
Authority: US
Inventors: George H Gilman
Original assignee: Sullivan Machinery Co
Current assignee: Sullivan Machinery Co
Priority date: 1908-11-13
Filing date: 1911-06-20
Publication date: 1913-02-11
Anticipated expiration: 1930-02-11

Description

G. H. GILMAN. rnnssunn AUTUATBB Toor.. Arrmoumx r'mzn :min zo, m1.

1,053,093. l Patented Feb. 11. 1913.

UNITE@ rltrtllfhlti 'PATENT tltitl. y

GEORGE H. GILMAN, GF CLAREMONT, `llftll HAMPSHIRE, ASSIGNOR TO SULLIVAN MACHINERY COMPANY, OF CLAREMNT, NEW HAMPSHIRE, A CORPORATION 0F MAINE.

PRESSURE-ACTUATED TOL.

Specification of Letters Patent.

Part-.urea nen. 'i 1,1913.

Original application filed November 13V, 1908, Serial No. 462.402. Divided and this application filed' .Timel 20, 1911 Serial No. 634,281. v

To a7! y207mm z'zf may concern: l

le it known that I, Gnocca H. (lumix, a citizen ot the United States, and residing at Claremont, county of Sullivan, and State of New Hampshire, have invented an Improvenient in Pressure-ctuated Tools. ot which the following description, in connection with the accompanying drawings, is a specification, like characters on the drawings representing like parts.' l, y y' This invention relates to,t`o(` ls"fa1itl ,consists more particularly in 'the 'pri'ivision 'of an improved chuck' -ortool holder `for a pressure-actuated tool. A

This application is a division ot my prior r o-pending application. Serial No. loin-M2, tiled November lll, 1908. i

Illy invention will he best understood by reference to the `tollo wing description when taken in connection with the accompanying illustration ot one specific embodiment thereof, while its scope will be more particularly pointed out in the appended claims.

In the drawings: AFigure l lshows a plan in detail ot' the clamp for-the tool bushing; Fig. is a transverse section in elevation taken on the line Q-Q in Fig. l; Fig. 3 shows a cent-ral longitudinal section in elevation of the 'forward end of a hammer drill cylinder to which is applied the tool bushing` and clamp shown in Figs. l and 2. 4

Referring to the drawings and the illustrated embodiment of my invention, I have there shown a pneumatic tool, herein ot' the hammer drill type having the cylinder l containing the hammer piston 2 which is adapted to be reciprocated and strike an impact or anvil member 3 resting against. the end of the shank of acutter drill or bit -l. The piston hammer may be of any usual or ordinary type, the construct-ion of the valve and supply ports and passages being ot no material concern in connection with thev present invention.

In the operation of a tool ot this type the point of the bit or cutter is pressed against the Work, while its opposite end receives the blows delivered by the piston hammer, the critter' bit being permitted longitudinal movement in its holder and being rotatably moved from time to time by the .rotation of thetool itself o'r through other appropriate means. Referring to the holder .for the cut` ter, the shank of the drill -lpreferably pas-ses thrrnigh a suitable bushing the latter having a bore conforming to the cross section of the drill so as to prevent rotative movement of the drill relatively to the bushing while permittingr its longitudinal .moven'ient To prevent either rotative or longitudinal displacement ot the luishing, the la-tter'is held fixed in the end of the cylinder by afkey bolt lying transversely across the bushing. The key carried in the split clamping piece 7, which is adapted to be slipped over the end 'ot' the cylinder and clamped into position by the key.' T he walls ofthe cylinder are transversely cut away to receive the key, andthe latter 1s provided with an inclined bushingengaging wall 8 adapted to seat in a corre-L spondingly shaped groove or recess in the bushing, s0 that, when the bolt is clamped up the key seats in the bushingrecess-and the bushing is locked rigidly against displacement of any kind within the cylinder. By unloosening the clamping nut 9 the key may be moved laterally far enough'to permit the removal of the bushing Without the withdrawal of the key from vthe cylinder. Preferably, though not necessarily', the cylinder is split as at l0 for a short distance from its end, so that the bushing can be slippe l-fi-eely in and outv ot' the cylinder, while, at the same' time. it may he clamped tightly within the cvlinder when the clamping nut 9 is tightened. Y

As will be seen from Figs. and 3, the external head of the key bolt is Wider than the .internal portion 12 on which is formed the inclined engaging wall 8 so that the head bears against the walls of the split clamping piece. It will therefore be observed that the key bolt, by reason o t' its entrance into the groove or recess in the hushing, holds the latter positively against lon- `gitudinal or rotative movement, and at the same time contracts. and gripsv the splitclamping piece about the split walls ol the cylinder to cause the latter to contract and grip the bushing, a sutticient initial clearancel between the wall 8 and the bushing recess being provided to permit a suliiciently forcetul gripping action to take place as heretotore referred to.

`While I have herein shown and described 'for the purposes oit illustration one concrete 'former-embodiment of my invention, it is to'he'und'erstood that Athe same is not limited toffthe' .details of construction, or, relative form or arrangement of parts, `or to the aptplieation] @frein made of the various features vxtherebf, but that the same ,may be modifie Within Wide limits without departfingfromgthespirit of .the invention.

12.'. In a pressure-operated tool, t-he combination fof a' cylinder provided With` a bushu'g-rezpeiving end portion provided with a key-receiving passage, Va piston insaid -cyliin'al thrustl from said lpistoma bushing 'raving Aprovision t-ohold said tool non-rotative While permitting longitudinalmovementthereof, and provided with an inlsaidtbushin fined'. including a clamping ,keyflocatedf 1n said passage, having an ex- ,ternally `seated shoulder, and a' laterally' projecting inclined-portion. located in said figf'reessf," and a nuttthreadedcnto said key fordrawingv the latter into said recess.

13; In a pressure-operatedtool, the combii nation of? av cylinder'y 'having la cont-ractible keyreceiving"passage, a piston, a tool sai piston, va bushinghaving provision to vhold" said tool non-rotative while permitting y'l ongtndinal movement thereof, saidf hush- EDfingV-being" provided lwith a lateral'recesaf andfmeans to contract said cylinder -tol grip thetbushingthereim including a key located Vin'said passage and having a laterally' projecting portion located in said recess.'

4g-In a: pressure-operated tool, the combination of-a cylinderl having a contractible bushing-receivingend port-ion provided with a 'key-receiving passage, a piston, a tool 'ada ted 'to receive a longitudinal thrust from sai I' piston, a'bushing. having provision to hold said tool non-rotative While permitting longitudinalfmo'vem'ent thereof, said bushmeans to contract said4 cylinder to gripthe bush-ingtherein,l including a `key locatedm ide'r', a tool 'arranged to receive a longituelinedflateral recess, and 4,means for holding receivlng assage a i y 'bushing-receiving end portionA provided with ada ted'toreceWea longitudinal thrust from ing being provided'with ala'teral recess, and

' said passage and naving an externally seated head anda laterally projecting portion located in saidrecess.

5. In a pressure-operated tool, the combination of a cylinderhaving acontractible bushing-receiving endportion provided with a key receiving passage, a piston, a tool adapted to receive a longitudinal thrust from said piston, a bushing having provision to hold said toolnon-rotative While permitting longitudinal movement thereof, said bushing being 'provided With a lateral recess, and means to contract said cylinder to grip the 'bushing therein, including a key located in said passage and having an externally-seated head at one-end, a reduced screW-threadedshank at its other end, and an intermediate laterally projecting portion located in said recess, and a nuthaving screw-tln'eaded.engagement with, said shank. 85

(i. In a pressi1re-operated tool, the combination of a cylinder having a bushing-receiving end portion provided With a key-receiving passage having an enlarged non-cyiindrical portion, 'a piston, a tool adapted 90 to receive a longitudinal thrust from said piston, va loushingy having pro-vision to hold said tool non-rotative, while permitting vlongitudinal movement thereof, said bush- ,lng bein provided with a. lateral recess, a .contracti le collar, and means to contract said collar to cause the bushing to be gripped, including a key having an externally-seated head and an enlarged non-cylindrical portion located in said non-cylindrical' portion -of said passage and projectincinte-said recess. f

In a pressure-operated tool, the combination of a cylinder having a bushing-receiving end portion provided with a keypiston, a tool adapted to receive a ongltudinal thrust from said piston, a bushing having provision to hold said tool non-rotative, while ermitting longitudinal 'movement thereof? said bushing loeing `rovided with a lateral recess, al contractible collar, and meansI to contract said collarto cause the bushing to be gripped, including a key located in vsaid passage and having an externallyseated head at one end, a reduced screw-threaded shank at its other end, and an intermediate enlarged portion located in said recess,l and. a nut having screwt threaded engagement- With said shank'.

(8. In a pressure-operated tool, the comhi- 120 n ation of a cylinder having a contractible bushing-receiving end portion provided with a key-receiving passage, a piston, a tool f Aadapted to` receive a longitudinal thrust from said piston, a bushing having provisionto hold said tool non-rotative, While permitting longitudinal movement thereof, said bushing being provided with a lateral recess, and means to contract. said cylinder i to gripl the bushing therein, including a key havin a laterali rojectin rtion located t[in said recesys :13nd lockiiigpsaid bushing against rotative and longitudinal movement.

9. In a pressure-operated tool, the combination of a cylinder having a contractible bushing-receiving end portion provided with a key-receiving assage having an enlarged non-cylindrical1 portion, a piston, a too adapted to receive a longitudinal thrust from said iston, a bushing having provision to hod said tool nonrotatve,'whi1e permittin longitudinal movement thereof, said bushing being provided with a lateral recess, and means to contract said cylinder to grip the bushing therein, including a key having an enlarged non-cylindrical portion located in said non-cylindrical portion of said assagc and projecting int/o said redplockin said bushing against rotative as well as ongitudinal movement.

10. In a pressure-operated tool, the combination of a cylinder having a contract-ible bushing-receivin end portion provided with a key-receiving passage, a piston, a tool adapted to receive a longitudinal thrust from said piston, a bushing having provision to hold said tool non-rotative, while permitting longitudinal movement thereof,

Said bushing being provided with a lateral recess, and means to contract said cylinder to gri thea-bushing therein, including a contraeti le collar, a key located in said passage and having an externallyseated head 'and 'a ortion non-rotatively engaged in said cylinder and located in said recess.

11. In a pressure-operated tool, the conibination of a cylinder having a bushing-rt ceiving end portion provided with a non-cylindrical ke -receiving passage, a piston, a tool adapte to receive a longitudinal thrust from sald istan,l a bushing having provision to ho d said tool non-rotative, while permitting longitudinal movement thereof, said bushlng bein provided with a lateral recess, a contractile collar, and means to contract said collar to cause the bushing to be gripped, including a key. having a noncylindrical portion located in said passage and projecting into said recess.

In testimony whereof, I have signed my name to this specification, in the presence ot' two subscribing witnesses..

GEORGE H. GILMAN.

Witnesses:

CHAS. J. JoNEs, E. J. BURCHARD.