CLAIMS
`
`Whatis claimed is:
`
`PDS0002.USC2
`
`1.
`
`A prosthetic finger comprising:
`
`a knuckle defining an arc and configured to attach to a prosthetic socket;
`
`a first phalange comprising a first end coupled to the knuckle and a second end,
`
`the first phalange configured to:
`
`move with respect to the knuckle inafirst direction corresponding to
`
`flexion of the prosthetic finger; and
`
`move with respect to the knuckle in a second direction corresponding to
`
`extension of the prosthetic finger;
`
`a second phalange coupled to the first phalange and configured to rotate about
`
`the second end ofthe first phalange;
`
`a link bar comprisingafirst end coupled to the knuckle and a second end
`
`coupled to the second phalange, and configured to rotate the second phalange about
`
`the second end ofthe first phalange when the first phalange moves in the first direction;
`
`a locking mechanism comprising:
`
`a first component coupledto the first phalange;
`
`a second componentcoupledto the knuckle, the first component
`
`configured to prevent the first phalange from moving in the second direction when the
`
`first component is engaged with the second component; and
`
`a release button configured to disengage the first component from the
`
`second component to allow the first phalange to movein the second direction.
`
`2.
`
`The prosthetic finger of claim 1, further comprising a spring, wherein:
`
`the spring is configured to bias the first phalange to movein the second direction;
`
`and
`
`the first end of the link bar is configured to rotate with respect to the knuckle to
`
`cause the second phalange to extend when the first phalange movesin the second
`
`direction.
`
`-26-
`
`
`
`Whatis claimed is:
`
`PDS0002.USC2
`
`1.
`
`A prosthetic finger comprising:
`
`a knuckle defining an arc and configured to attach to a prosthetic socket;
`
`a first phalange comprising a first end coupled to the knuckle and a second end,
`
`the first phalange configured to:
`
`move with respect to the knuckle inafirst direction corresponding to
`
`flexion of the prosthetic finger; and
`
`move with respect to the knuckle in a second direction corresponding to
`
`extension of the prosthetic finger;
`
`a second phalange coupled to the first phalange and configured to rotate about
`
`the second end ofthe first phalange;
`
`a link bar comprisingafirst end coupled to the knuckle and a second end
`
`coupled to the second phalange, and configured to rotate the second phalange about
`
`the second end ofthe first phalange when the first phalange moves in the first direction;
`
`a locking mechanism comprising:
`
`a first component coupledto the first phalange;
`
`a second componentcoupledto the knuckle, the first component
`
`configured to prevent the first phalange from moving in the second direction when the
`
`first component is engaged with the second component; and
`
`a release button configured to disengage the first component from the
`
`second component to allow the first phalange to movein the second direction.
`
`2.
`
`The prosthetic finger of claim 1, further comprising a spring, wherein:
`
`the spring is configured to bias the first phalange to movein the second direction;
`
`and
`
`the first end of the link bar is configured to rotate with respect to the knuckle to
`
`cause the second phalange to extend when the first phalange movesin the second
`
`direction.
`
`-26-
`
`
`
`PDS0002.USC2
`
`3.
`
`4.
`
`The prosthetic finger of claim 2, wherein the spring is a torsion spring.
`
`The prosthetic finger of claim 1, wherein the link bar extends through the
`
`first phalange.
`
`5.
`
`The prosthetic finger of claim 1, wherein the knuckle includes an aperture
`
`that is used to rotationally couple the first end of the link bar to the knuckle.
`
`6.
`
`The prosthetic finger of claim 1, wherein:
`
`the first component comprises a ratchet; and
`
`the second component comprises one or more teeth.
`
`7.
`
`The prosthetic finger of claim 6, wherein the ratchet is connected to the
`
`first phalange and slides along the one or more teeth when the first phalange is moved
`
`in the first or second directions.
`
`8.
`
`The prosthetic finger of claim 1, wherein:
`
`the first phalange corresponds to a medial phalange of a hand; and
`
`the second phalange corresponds to a distal phalange of the hand.
`
`9.
`
`A prosthetic finger comprising:
`
`a knuckle configured to interface with a prosthetic socket;
`
`a first phalange comprising a first end coupled to the knuckle and a second end,
`
`the first phalange configured to:
`
`rotate about the knuckle inafirst direction corresponding to flexion of the
`
`prosthetic finger; and
`
`rotate about to the knuckle in a second direction corresponding to
`
`extension of the prosthetic finger;
`
`a second phalange coupledto the first phalange and configured to rotate about
`
`the second end ofthe first phalange;
`
`-27-
`
`
`
`a link bar comprisingafirst end connected to the knuckle and a second end
`
`PDS0002.USC2
`
`connected to the second phalange, and configured to couple movement ofthe first
`
`phalange and the second phalange suchthat when the first phalange rotates about the
`
`knuckle the second phalange rotates about second end ofthe first phalange; and
`
`a locking mechanism coupledto the first phalange and configured to:
`
`operatein a first state that prevents movement ofthe first phalange in the
`
`second direction; and
`
`operate in a second state that allows movement ofthe first phalange in the
`
`second direction.
`
`10.‘
`
`The prosthetic finger of claim 9, wherein:
`
`the locking mechanism is configured to operatein the first state when not being
`
`engaged by the user; and
`
`the locking mechanism is configured to operate in the second state when
`
`engaged by the user.
`
`11.|The prosthetic finger of claim 10, wherein the locking mechanism
`
`comprises a button, that when pressed, causes the locking mechanism to transition
`
`from the first state to the second state.
`
`12.
`
`The prosthetic finger of claim 9, further comprising a torsion spring
`
`configured that is configured to move the first phalange in the second direction when the
`
`locking mechanism is in the second state.
`
`13.
`
`The prosthetic finger of claim 9, wherein the locking mechanism
`
`comprises:
`
`a set of teeth; and
`
`a ratchet configured to engage with the set of teeth when the locking mechanism
`
`is operating in the first state.
`
`-28-
`
`
`
`PDS0002.USC2
`
`14.
`
`The prosthetic finger of claim 13, when the ratchet is connected to the first
`
`phalange.
`
`15.
`
`The prosthetic finger of claim 9, wherein:
`
`the first end of the link bar is configured to pivot with respect to the knuckle; and
`
`the second end ofthe link bar is configured to pivot with respect to the second
`
`phalange.
`
`16.
`
`‘The prosthetic finger of claim 15, wherein:
`
`the knuckle comprises an aperture; and
`
`the aperture is used to connectthe first end of the link bar to the knuckle.
`
`17.
`
`A prosthetic finger comprising:
`
`a knuckle configured to interface with a prosthetic socket;
`
`a first phalange defining a first end coupled to the knuckle, a second end
`
`opposite the first end, and configured to:
`
`movein a first direction corresponding to flexion of the prosthetic finger;
`
`and
`
`finger;
`
`move in a second direction corresponding to extension of the prosthetic
`
`a second phalange defining a first end coupledto the first phalange and
`
`configured to rotate about the second end ofthe first phalange;
`
`a link bar comprising:
`
`a first coupling to the knuckle that is configured to allow the link bar to
`
`rotate relative to the knuckle; and
`
`a second coupling to the first end of the second phalange to that causes
`
`rotation of the second phalange about the second end ofthe first phalange when the
`
`first phalange moves with respect to the knuckle; and
`
`a spring configured to bias the prosthetic finger to move in the second direction.
`
`-29-
`
`
`
`PDS0002.USC2
`
`18.
`
`The prosthetic finger of claim 17, further comprising a locking mechanism,
`
`wherein:
`
`the locking mechanism prevents movement ofthe first phalange in the second
`
`direction when operating in a first state; and
`
`the locking mechanism allows the spring to movethe first phalange in the second
`
`direction when operating in a second state.
`
`19.
`
`The prosthetic finger of claim 18, wherein the locking mechanism
`
`comprises:
`
`a stop that is configured to setfull flexion of the prosthetic finger; and
`
`a disengagement feature that is configured to switch the locking mechanism from
`
`the first state to the second state in response to contacting the stop.
`
`20.
`
`‘The prosthetic finger of claim 17, wherein the spring is a torsion spring.
`
`-30-
`
`
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