US3822418A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrically driven artificial hand for upper extremity prosthesis
Assignee: Individual
•
Filing: 1971-08-31
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Granted: 1974-07-09
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Expires: 1991-08-31
Abstract
Abstract An artificial hand for upper extremity prosthesis, comprising a reversible electric drive controlled by, for example, bioelectric potentials produced by muscles, and kinematically associated with an actuating lever of the thumb and with at least one for the thumb-opposing fingers. The mechanical linkage interconnecting the electric drive with said thumb-opposing finger is essentially a disengageable unidirectional linkage capable of ensuring that the positive effect of the electric drive upon said finger occurs solely in the direction of extension thereof. The thumb-opposing finger is coupled to a spring actuating it in the direction of flexion thereof, and is provided with a lock to prevent it from being extended under any external force.
Inventors
- 👤 Lliin B Popov
- 👤 A Skachkov
- 👤 N Skudina
- 👤 S Forichey
- 👤 G Degtyarev
- 👤 M Bir
- 👤 N Kovanov
- 👤 J Melnikov
- 👤 L Voskoboinikova
- 👤 Y Yakobson
- 👤 A Sysin
- 👤 V Leonov
- 👤 V Ignatovich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:46
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/50; A61F2/54; A61F2/58; A61F2/583
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
143 words
An artificial hand for upper extremity prosthesis, comprising: a frame; a thumb pivotally attached to said frame; at least two fingers located opposite said thumb; said at least two fingers being pivotally attached to said frame; an actuating lever connected to said thumb; a reversible electric drive mounted on said frame; said electric drive being kinematically coupled with said actuating lever of the thumb and interconnected through a disengageable unidirectional non-reversible mechanical linkage with at least one of said thumb-opposing fingers so that the positive effect exerted by said electric drive upon said thumb-opposing finger occurs only in the direction of extension thereof, a spring connected to said thumb-opposing finger to actuate said thumb-opposing finger in the direction of flexion thereof; and a lock connected to said thumb-opposing finger to ensure against extension of said thumb-opposing finger under any external force applied thereto.
Claim 2
Dependent Claim
143 words
An artificial hand for upper extremity prosthesis, comprising: a frame; a thumb pivotally attached to said frame; at least two fingers located opposite said thumb; said at least two fingers being pivotally attached to said frame; an actuating lever connected to said thumb; a reversible electric drive mounted on said frame; said electric drive being kinematically coupled with said actuating lever of the thumb and interconnected through a disengageable unidirectional non-reversible mechanical linkage with at least one of said thumb-opposing fingers so that the positive effect exerted by said electric drive upon said thumb-opposing finger occurs only in the direction of extension thereof, a spring connected to said thumb-opposing finger to actuate said thumb-opposing finger in the direction of flexion thereof; and a lock connected to said thumb-opposing finger to ensure against extension of said thumb-opposing finger under any external force applied thereto.
Claim 3
Dependent Claim
75 words
The artificial hand as claimed in claim 1, comprising a slide block connected to said thumb-opposing finger; at least one guideway for reciprocating motion of said slide block; said at least one guideway being secured on said frame; and a push rod fixed on said actuating lever of the thumb and adapted to interact with said slide block; said slide block and pushrod effecting said kinematic coupling of said electric drive with said thumb-opposing finger.
Claim 4
Dependent Claim
78 words
The artificial hand as claimed in claim 2, wherein said lock preventing said finger from extending under an external force includes a movable wedging plate provided with a hole, and a guide stem attached to said frame and passing through said hole, said plate being movably mounted on said slide block at a point removed from said guide stem at a distance that enables said plate to be made askew and self-wedged with respect to said guide stem.
Claim 5
Dependent Claim
23 words
The artificial hand as claimed in claim 3, wherein said guide-way of said slide block is essentially said guide stem of said plate.
Claim 6
Dependent Claim
39 words
The artificial hand as claimed in claim 3, wherein said plate is spring-actuated with respect to said slide block in the direction of its self-wedging when said slide block travels in the direction of extension of said thumb-opposing finger.
Claim 7
Dependent Claim
68 words
The artificial hand as claimed in claim 3, including a rocking pressure strip pivotally attached to said frame, one side of said pressure plate interacting with said push rod fixed on said actuating lever of the thumb, and its other side interacting with said self-wedging plate at a point that enables said pressure plate to be unwedged when motion is imparted from said pushrod to said slide block.
Claim 8
Dependent Claim
41 words
The artificial hand as claimed in claim 1, including an automatic stop lock attached to said frame and coupled with said thumb-opposing fingers so as to restrict the movement of said thumb-opposing fingers in the position corresponding to a finger-pinch grasp.
Claim 9
Dependent Claim
41 words
The artificial hand as claimed in claim 2, including an automatic stop lock atTached to said frame and coupled with said thumb-opposing fingers so as to restrict the movement of said thumb-opposing fingers in the position corresponding to a finger-pinch grasp.
Claim 10
Dependent Claim
58 words
The artificial hand as claimed in claim 8, wherein said automatic stop lock includes a rocking lever articulated to said frame, and a throw-over spring interconnected with said lever and adapted to fix the lever in its extreme positions, said lever having arms and said slide block having abutments adapted to interact with said arms of the lever.
Claim 11
Dependent Claim
46 words
The artificial hand as claimed in claim 9, wherein one of said arms provided on said rocking lever serves to bring said lever from the extreme positions, while the other of said arms is to fix said slide block in the position of a finger-pinch grasp.
Claim 12
Dependent Claim
129 words
The artificial hand as claimed in claim 1, including a forefinger; a middle finger; a ring finger; a little finger; said forefinger, middle finger, ring finger and little finger being said thumb-opposing fingers, rigidly interconnected main phalanges of said forefinger and middle finger; a friction coupling for connecting said main phalanges to said ring finger and little finger, a positive stop to restrict movement of said friction coupling, said stop serving to restrict the degree of extension of said ring finger and little finger with respect to said forefinger and middle finger, while said ring and little fingers are connected to said middle and forefingers via the friction coupling provided with the positive stop to restrict the degree of their extension with respect to said fore and middle fingers.
Claim 13
Dependent Claim
44 words
The artificial hand as claimed in claim 11, including a friction coupling to interconnect the little and ring fingers, and said coupling being provided with a positive stop to restrict the degree of extension of the little finger with respect to the ring finger.
References Cited (Backward Citations)
US3521303A
Cited
US3604017A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-08 | 1978-01-07 | 1978-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-08 | 1982-01-07 | 1982-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-08 | 1986-01-07 | 1986-07-09 | $7700.00 | Window Closed / Lapsed |