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Publication numberUS1630277 A
Publication typeGrant
Publication dateMay 31, 1927
Filing dateOct 6, 1926
Priority dateSep 23, 1926
Publication numberUS 1630277 A, US 1630277A, US-A-1630277, US1630277 A, US1630277A
InventorsJames Smith
Original AssigneeJames Smith
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Mechanical detachable hand and forearm
US 1630277 A
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Description  (OCR text may contain errors)

1927. lMay 31, L SMITH MECHANICAL DETACHABLE lHAND AND Fons [uml Filed Oct. 6, 1926 2 Sheets-Sheet 1 Ma 3l 1927.

y J. SMITH MECHANICL DETAGHABLE HAND AND FORE ARM Filed oct. e', 132e 2 sheets-snee*v 2 zu J '1 Vchanical hand Which Vcani-be'"locked toanV Y artificiali forea r1 n, fthe handibeingof the` type in 4which eachnger and .thumb'lcom-- prises a spiralv spring .it/ith ai flexibleltension e Wire between fthepalm vand .the tips.; ofthe i finger andgthumb and extending along theV V.palm iside' of each finger and; thumb,y the fingers and thumb being openediand closed byfa flat spring extending from the `tip'V ofv the `finger "or thumb to a, movable plate iar-V ran'ged Within the Vpalmbflthe hand, the? plate" =being preferably'operated by a..conv

Alamented Mayl 315,192.7, f


'My invention relates'to" an artificialme# fingers; kFigure isV an:edgej,vieW ,oyffgthe nectin'g link `from `a piyfot'efdratchet 'sector 'which is operated by Va .Wird/and locked-in] any position by a'springdetent controlled,

by a ro d pro] ecting o utjwith the hand `and has `forYyitsobject'to'improye :the 'construcvy tion andvaction Aof such 'hands.,f 'L

According *to Athe present invention Jthe Y flat springs yare Vmoyed`outwards ,againstthe action ofy the spiral spring `:fingers7 f on .guide rods provided with* sho'k ,-iabsorbing A springs, by the .nsual'conn'ecting link and v bellcrank -[leVer. VThe thumb is: provided?V A with V:the usual' fiat spring, if andthe inner end Y of this spring -is r connected to'.n a? blockv slid-, x `ing on a guide irod,-eaidifblock'beingriconf.. Vnect'ed by -ar'od to theftransverse plates',` thelrod having an; elongated vs lot formed in A itl so that apredeterminedgmovement io-fnzthel fingers takes place fbeforeltheeithumb? isf v`vwardsith'efingers cz'iuse".,thefiat-spiingseff6,;=A :to curve,therebyi,dlosingthe ingersgwhil'st l thepspriiig's 85%,' .'effectla"cushioningw actfionfl v -g-y Y f between the clampingplatesf, and-thestops. r

' l M'vllie improyed-f arlticial fhand is detach?. able-from' the artificial' Vfore-arm, in order;- that another mechanical gripper can-be at.

taehed lto the'for'e-arm when required. The

Wrist of the detachable hand is locked tothefore-armby means of a locking pin en-y gaging Va looking platefand a balllbearing may be forniedbetween .thcbandfad the.

l end of aurod 13,;th'e rotherendlofsaid rodA fore-arm.v

' v,In .order'that iny'SaidinventionA andthe manner ofv performing thejsame :may lbeYV .properly understood,:1I` hereunto append two Sheets v'of explanatory;drawings" to be hereinafter referred to Adescribingy my invention. l

1 .Whichmay beeonveniently j made fr v a f exblenextensible connection 5,- Wil may vbeiof vvBowden Wire; fsteeL n,. ;or t i'corda orrisimilar materialithisflexibleQconv v nebtion i 5, `extendingl alongfzthe palmside of excepttowards the palmqofithe hand. 5

connecting ered;vk

transyerse movable members,`r Ilignrev 4, isl

a' plan view-of a combined farti-cialvhalld .ofnfthe locking plateautrhej f'Qrgalm` In K these drawingsfthefsame reference numerals Whereyer-theyiare :repeatedi Referring :to 4the ,dnawi gs', 1, ,Clesgllttes andtextendingaffrom,:the tip @fiieach ,fingenl and 'thinnb ItQ- the shell oripalmplateflfis f Vich eachfspiral s} ringv finger 63"1` and spiral l v sprm'gthnmb 4.1;; Thelconnections@,Lpref I' .Ventthe lingersfandlthumb freni: bending 2" i" Springs 6, Vextend along each finger, and

parallelrods provided: With/springsiSfi;

Said-rods beingsecnred'atone -endigto posts L-"fandVV fat the other endftfoprojectionsg-lO,

projeqtingnomine palm platea., Ther 10,V and so absorb4 anyshock,

rod 1Q," saidzblock being connectedto one :ai

transyerefejmembers impart'a-predetermined'5v j embers

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2493776 *Dec 4, 1946Jan 10, 1950Alberto PecorellaArtificial limb
US7867287Dec 7, 2006Jan 11, 2011Otto Bock Healthcare GmbhHand prosthesis with fingers that can be aligned in an articulated manner
US8343234Dec 7, 2006Jan 1, 2013Otto Bock Healthcare GmbhHand prosthesis comprising two drive devices
US8579991Dec 7, 2006Nov 12, 2013Otto Bock Healthcare GmbhHand prosthesis and force transmission device
US20120330432 *Jun 21, 2012Dec 27, 2012The Chinese University Of Hong KongFinger prosthesis
DE102005061313A1 *Dec 20, 2005Aug 16, 2007Otto Bock Healthcare Ip Gmbh & Co. KgHandprothese
DE102005061313A8 *Dec 20, 2005Sep 4, 2008Otto Bock Healthcare Ip Gmbh & Co. KgHandprothese
U.S. Classification623/61, 623/64
International ClassificationA61F2/50, A61F2/58
Cooperative ClassificationA61F2/583
European ClassificationA61F2/58H