US1074116A - Rotary percussive tool. - Google Patents

Description

C. H. HAESELBR. ROTARY PBRGUSSIVE TOO..

APPLICATION FILED MAY 27, 191s. l 074,1 6, Patented Sept. 30, 1913.

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03H. HAESELBR. ROTARY PERGUSSIVE TOOL. APPLIOATION FILED MAY 27,1913.

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C. H. HAESELER. ROTARY PERCUSSIVE IIJOOL. `MPPLUJATION FILED MAY 27, 1913.

1,074,116. Patented sept. 30,1913.

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n rHILA-nnpjrila, PENNSYLVANIA ROTARY rnncussrvi: -rroorif VTo aZZw/Lom-z' may concern:

Be it known that I, CHARLES I-I. Hansa- LER, a citizen of the United States, residing in the vcity ofPhila'delphia, county of Philadelphia, and State of Pennsylvania,.

haveinvented certain Improvements in Rotary Percussive 'Tools, of which the following is a specification.'

My inventionis designed toprovide improved mechanism for automatically rotating drills, bits or upsetting devices of percussive tools, particularly thel cutting devices of pneumatic hammer drills.

Mechanisms hereto-fore employed for Vrotating drills have been defective in their operations because," among other reasons,1

they have lacked the capacity to eifect the desired turning movement, on account of the close relation of themotor to its work and the character of the means by which it is actuated. Particularly .in .producing the turning movement by a fluid motor, the cylinder and piston employed have been disposed vand connected so that the clutch mechanism to be operated fails to engage 'upon defective act-ions or short strokes of the piston which result from the condensation 0f moisture in the air, the accumulation of dust, andthe limited timethe uid acts upon the piston. v

The leading purposes of my improvements are to avoid these detects .of the priorV art and to provide an etliciet mechanism ca-' pable of eilecting 'the desired intermittent rotary movement, which I am enabled to do by means comprising a. clutch having a member directly connected lto the drill chuck in front of the main cylinder containing the percussion piston, a` fluid motor having a cylinder containing a piston at the rear of the main cylinder, a lever having a short ann\connected with a member of the clutch and .a Vlong arm connected with the motor piston so that the reductions in the stroke of the latter shall have` comparatively slight eecton the .action of the clutch insuiicient tol prevent its intended operation, and means for n iaintaining?, the motive fluid on the mo.- is'ton throughout the greater part of tor the ength of :the strokes'of the percussion fpiston' for the purpose of obtaininfr acom- .plete throw of the lever and the f 'l1 of the clutchi f 'P This mechanism is' 'characterized by 'aivlcien'cy and reliabilityof action inggreat,

Specification of Letters Patent, Application sied May 27, 1913.

aaien' 4'the cylinder 1 yrods 55 v (whic serial no. 17.121135.:

measure to '-thescompafratively long stroke of the piston c )pe'rating4 the lever, the multiplied lengthjof thelevers power arm compared with its work arm operating the clutch whereby a equate force is provided for securing the urning movement, and the maintenance of'the niotive fluid on the'piston during practically the full stroke of the ps rcussionp'iston. l

' In the accompanying drawings, Figure 1 is a part sectional elevation of a hammerr drill embodying my improvements; Fig. 2

is an elevation of the same at right angles to that `sho-wn in Fig. 1; Fig. 3 is .a'sectional view taken on the line 3-3 of Fig. 2; ig. 4c is a sectional view taken, on the line ofFig. 3; Fig. 5 is'a sectional view taken on the line 5-5 of Fig. 3; Fig. 6 -is a sect-ionalfview'V taken on, the line 6 6 of- Fig. 3; Fig. 7 is a diagrammatic Asectional View of the developed apparatus showing the relation of the parts with the percussion'piston at the beginning of its forward stroke; .'Fig.g8zisa diagrammatic sectional viewl o-.thedeveloped apparatus showing 'Patent d sept. ao, 1913.

the relation-'ofthe parts with the percussion piston at the beginning of its reverse movement. f f

The.' hammer drill I illustrated I,comprisesthe main c linder 1- having thehead 3 at the rear @ndt ereof and the reducedylinder 4 fixed to thehe'ad 5 at the `orward end thereof. A piston 6 is adapted to'reciprocate in the cylinder 1 and is provided with,

the hammer 8 adapted to reciprocate in the cylinder 4. 'Af chuck is provided by a head 9 which engagesthe forward end of the cyl? inder 4, has tixed thereto the sleeve 10 revoluble within the' cylinder, and is screwed into the sleeve 11 revoluble on the cylinder,

-the outer sleeve vhaving the circular flange or ring 12 at the't'op thereof-and the ratchetteeth 13 thereon. A drill shank'14 extends upwardly through the head 9 and sleeve 10 into the cylinder 4 so that the rear end thereof may receivejthe blows of the hamf mer 8 'which drives the stem forward through such sleeve, the latter conforming to the octagonal contour or flat surfaces of the-stem. A collar. 15 incases the 4flange 12 and is-prQv'idedwith an inwardly extending Vilangef- 16 Awhich engages the aforesaid ila" e; the collar being supported and normal y held in en agement .with dangle v pass throhgli lugs 57'on the collar, and between lugs 56 and through lugs 58 on the main clyinder) and springs 59 held by such rods in engagement with the flange 16. "Aclutch ring. 17, provided with ratchet teeth-;. 18' which engage the teeth13,"encircle's the cyl.-

inder 4, within the collar 15, andis pressed towardlthe fiange or ring 12 blyplungers 19 actuated by springs 20, the ring-beingy provided with the stud 22 f extendingf through the collar and having the cylindri.-

26 is fulcrumed on the stud ,27 fixedto,thev

.cal bearing 24 journaled thereon.

cylinder 1 and has at Athe'end ofSit-s' short arm a yoke 25 which engages inconforming relation with the spherical surfacewof -the bearing 24. This lever has at the end'fof, its long arm a bearing 28 journaled by `means of the stud 29 connected to the piston 30- having recessed heads 31 and-32 adapted to reciprocate in the respective cylinders' 33 and 34, these cylinders being fixed to a head V sleevedv on the -rear head of the `cylin-I -de'r 1.

screwedin the ends thereof the heads 31" The cylinders 33 and v34 have and 32 provided with plugs 31"' and 32 adapted to enter the recessed heads.

Motive fluid is introduced by the conduitl 37 in the head 60,'to the cylinder 1, `through the screen 47 passage 38, chamber 39, asf sage 40 communicating with the rear-en of l thecylinder and passage 41 communicating at points between the .points of connection' ofthe passages 35 and36 with suchT cylinder. In operation lthe tool is held in position by 'the handle 60 fixed to the head 60 and motive fluid is admitted through the assages 37 38, 39, and 40 to the interior o the,

cylinder 1 to drive the piston 6 and hammer 8 forward and strike' the idx-ill! shank 14.1.

When this pist-on, in its forward movement, uncovers the passage 35, motive Huid is 'ad- I mitted therethrough to thecylinder 33 and moves the piston 30 t'o the positionA shown in Fig. 7 The lever 26 is thus rocked on its fulcrumy 27 and turns the clutch `ring 17, which positively engages and turns the complementary clutch ring 12, thereby turning the parts 11, 9, 10 4'and 14 through the dei sired angle. When the advancing piston 6 uncovers the exhaust port 43 and establishes its connection with the passage 35, the'cylinder 33 exhausts therethrough, and, the pas sage 44 then being covered, uid in the cylinpassagev 35.

der. front. offri-the. piston 6 is compressed .land acts through-the passage41 to move Ithe va `ve 47 so 'as to.. establish communication --1betw e`n the passages3:8*a'ndf4L The motive Huid" now Hows'throughgtheipassage 41 to' the cylinder 1 to move the piston 6 in the Areverse direction and through-fthe v{ iassage 36 .to the-cylinder 34 to movethe pistonlBO to the position-shown 4in Fig. 8. Thisfmove- `mentof -thejpisto'n 30' rocks the lever26 and fturns thegclutch ring-17,backward, the teeth `18ridingT-*over theteeth13;, Y. l'

Having nescribeamyinvenn 'Eri-sisi@ l 1.- In'a percussivirtual; the combination-of..k

a cylinder, y a vpiston ladaptedl to` reciprocate therein, a chuck connectedfwithfandrevcluble relatively to, said. ;'cy lind er, .clutching u means connected with said chuclg, clutching means connected with and. adapted forgfengaging and revolving said clutchii'igmeans rst named, means 4comprising a lever for oscillating said .clu,tchi'ng means second -named and revolving said. clutching means first named,` and means whereby the reciprocation of said piston effects; -the-' 'oscillation of'saidlever.-

2. In apercussivej tool, a `main cylinder, a-

percussive pistonv 'adapted tofrecipro'cate therein, al revoluble tool-"holder,- clutching mechanism comprising a revoluble member connectedwith said holder and an oscillating member adapted for engaging said member first named, means com rising a fulcruiiied 4 lever for operatingsai 'oscillating member f and intermittently turning said revyoluhlev n member, a piston connected 4with said lever, fand-fluid .pressure means whereby said pis- Eton first named operates said `piston second named. 3. In a percussive tool, a main cylinder, a

percussion y piston adapted .to reciprocate therein, a revolubletool holder, means comprising clutchingdevices adjacent to the for ward endof said'cyinder' for intermittently turning said tool holder, a lever connected with said means whereby said' clutching mechanism` is operated, and fluid 'pressure mechanism adjacenttotherear end of said cylinder' whereby said-'lever is oscillated.

4. In a percussive `tool,"a' main cylinder,

a rcussion.pistonl thereinf-arevoluble tool ho der, incansfd -connect'i d 'said tool holder withtheforward endvof sai "cylinder, mech anism betw n the forward end 'of saidfcyiinder and said tool holder for intermittentlyf"I turning the latter, a'ever. for operating-said.- mecham'sm and turning said holder, a motor' in the rear lof said cylinder wherebyfsai'd le"- ver is oseillated, vand luidpressure means 5.' In a percussive tool,1a.`main cy `'iedergwhereby said pistonoperates-said mc zu an auxila cylinder connected withlthe vfm1- ward end t ereof, a permissive piston in; said maiivcylinder, a han fnei adapted to hereciprocated in safari auniiary cyiinder hysaid.

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pistomii toolholder connected with and revoluble relatively to said auxiliary cylinder clutching mechanism adapted to turn on sai auxiliary cylinder, said mechanism having a memberfixed tosaid holder and a member movable ,relatively thereto, a fulcrumed lever whereby said second member ber tixed to said tool holder and an oscillating -member whereby said member first named is turned, a fulcrumed lever for opera-ting said oscillating member, a fluid motor for oscillating said lever, and fluid pres- Copies of this patent may be obtained for sure means operated by said piston whereby said motor is operated.

7. In a percussive tool, a cylinder, a percussion piston therein, a revoluble tool holder, a driving device fixed thereto, an oscillatable device adapted for .turning said driving device, a casing containing said devices, a fulcruined lever, lmeans whereby said lever operates said oscillatable device, amotor for oscillating said lever, and fluid pressure means whereby said piston operates said motor. Y

In testimony whereof I have hereunto set my 'hand this 22nd day of May, 1913, in the presence of the subscribing Witnesses.v

CHARLES H. HAESELER.

Witnesses:

Jos. Gr. DENNY, Jr., GEO. A. 'CUNNEY.

'five cents each, by addressing the Commissioner of Patents. Washington, D. C.

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