US2211298A - Artificial knee joint - Google Patents

Artificial knee joint Download PDF

Info

Publication number
US2211298A
US2211298A US199590A US19959038A US2211298A US 2211298 A US2211298 A US 2211298A US 199590 A US199590 A US 199590A US 19959038 A US19959038 A US 19959038A US 2211298 A US2211298 A US 2211298A
Authority
US
United States
Prior art keywords
leg
knee
knee joint
artificial knee
bolt
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US199590A
Inventor
Simonsson Ludvig Hjalmar
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US2211298A publication Critical patent/US2211298A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/50—Prostheses not implantable in the body
    • A61F2/60—Artificial legs or feet or parts thereof
    • A61F2/64—Knee joints
    • A61F2/642—Polycentric joints, without longitudinal rotation
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/50—Prostheses not implantable in the body
    • A61F2/60—Artificial legs or feet or parts thereof
    • A61F2/64—Knee joints
    • A61F2/642—Polycentric joints, without longitudinal rotation
    • A61F2/644—Polycentric joints, without longitudinal rotation of the single-bar or multi-bar linkage type
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/50—Prostheses not implantable in the body
    • A61F2/60—Artificial legs or feet or parts thereof
    • A61F2/64—Knee joints
    • A61F2/642—Polycentric joints, without longitudinal rotation
    • A61F2/646—Polycentric joints, without longitudinal rotation of the pin-guiding groove linkage type

Definitions

  • the invention herein considered consists of a kneejoint for artificial legs, that lengthens and contracts and sometimes stops the bending of the knee during the walking, thus making the walk 5 less tiring and unsteady for the user.
  • FIG. 1 shows the leg in its lengthened position.
  • Figure 2 shows a front vertical section of the joint.
  • Figure 3 shows the leg at the beginning of the step when the joint is unloaded and the leg contracted.
  • I indicates the leg above the knee (the thigh section) and 2 the leg below the knee (the shin section).
  • the leg below the knee 5 2 is connected with the leg above the knee l through a double link 3, 6.
  • the link 3 is rotatably connected to the leg below the knee by a transverse bolt 4, whilst a transverse bolt 5 rotatably connects the link 3 with the link 6, which through a transverse bolt 1 is rotatably connected to the leg above the knee I.
  • the bolts 4, 5 and l are arranged in bearings preferably ball bearings, '8 indicates a recess or space in the thigh section, 9 indicates a stopping surface for the bolt 5 in the lower part of the recess or space, H] a stopping surface for said bolt in the upper part of the space, H is a stopping surface in the hind part of the leg above the knee, 12 a stopping surface in the front part of the leg above the knee, 13 a 30 stopping surface in the hind part of the leg above the knee and M a stopping surface in the front part of the leg below the knee.
  • the bearings 4, 5 and 1 are so arranged that they can move peripherically in relation to each other whereby the motion of the bearing 5 around the bearing 4 takes place at the first moment of the discharge of the step when the leg above the knee is advanced relative to the leg below the knee.
  • the surfaces l2 and H are caused to slide forward off the surfaces l4 and i3 respectively, whereby the length of the leg is decreased as shown in Figure 3, and furthermore it is made possible to bend the leg.
  • the upper and the lower parts of the leg are receding from one another.
  • the leg is so much extended as is permitted by the stopping surface 9 in the space 8 or recess.
  • the characteristic feature of the invention is that the leg above the knee (thigh) is rotatably connected with the leg below the knee (shin) by one or plural double links that cooperate parallelly, the links being rotatably attached around If a centre fixed to the leg above the knee and like- 0 wise rotatably attached around a centre fixed to the leg below the knee and further by a bolt connecting the links, the links being so arranged that they at different movements and moments of the walk permit the leg to shorten and lengthen, and further that when the leg below the knee is loaded the leg is prevented from bending in angle to the leg above the knee by properly arranged stopping surfaces.
  • Knee joint for artificial legs comprising a pair of links rotatably connected to the thigh section of the leg just above the knee, and another pair of links rotatably connected to the shin section of the leg just below the knee, said two pairs of links forming an angle with each other and being, in the angle point, rotatably connected to each other by means of a bolt, a stop in the thigh section of the leg for limiting the downward movement of said bolt, and supporting and stopping surfaces on the thigh section and on the shin section of the leg, located in front of and behind the centre line of the knee joint, said surfaces being in contact with each other in the lengthened position of the leg.
  • Knee joint according to claim 1 characterised in that a stop is arranged in the thigh section of the leg for limiting the upward movement of the angle point bolt.

Description

13, 1940- H. SIMONSISON 2,211,298
ARTIFICIAL KNEE JOINTS Filed April 2, 1938 INVENTOR:
Patented Aug. 13, 1940 UNITED STATES PATENT OFFICE Application April 2, 1938, Serial No. 199,590 In Sweden April 10, 1937 2 Claims.
The invention herein considered consists of a kneejoint for artificial legs, that lengthens and contracts and sometimes stops the bending of the knee during the walking, thus making the walk 5 less tiring and unsteady for the user.
The kneejoint is shown from the side in Figs. 1 and 3 of the enclosed drawing. Figure 1 shows the leg in its lengthened position. Figure 2 shows a front vertical section of the joint. Figure 3 shows the leg at the beginning of the step when the joint is unloaded and the leg contracted.
In the drawing, I indicates the leg above the knee (the thigh section) and 2 the leg below the knee (the shin section). The leg below the knee 5 2 is connected with the leg above the knee l through a double link 3, 6. The link 3 is rotatably connected to the leg below the knee by a transverse bolt 4, whilst a transverse bolt 5 rotatably connects the link 3 with the link 6, which through a transverse bolt 1 is rotatably connected to the leg above the knee I. The bolts 4, 5 and l are arranged in bearings preferably ball bearings, '8 indicates a recess or space in the thigh section, 9 indicates a stopping surface for the bolt 5 in the lower part of the recess or space, H] a stopping surface for said bolt in the upper part of the space, H is a stopping surface in the hind part of the leg above the knee, 12 a stopping surface in the front part of the leg above the knee, 13 a 30 stopping surface in the hind part of the leg above the knee and M a stopping surface in the front part of the leg below the knee.
The bearings 4, 5 and 1 are so arranged that they can move peripherically in relation to each other whereby the motion of the bearing 5 around the bearing 4 takes place at the first moment of the discharge of the step when the leg above the knee is advanced relative to the leg below the knee. By this motion the surfaces l2 and H are caused to slide forward off the surfaces l4 and i3 respectively, whereby the length of the leg is decreased as shown in Figure 3, and furthermore it is made possible to bend the leg. At the second moment of the step when the leg is carried forward, the upper and the lower parts of the leg are receding from one another. Hereby the leg is so much extended as is permitted by the stopping surface 9 in the space 8 or recess. At the same time the leg below the knee is projected forward in relation to the leg above the knee, the joint being thus checked when the supporting surfaces l2, l4 and H, 13 come into contact with each other and thus the leg is prevented from bending, when the weight of the'body is carried over to it. (See Fig. 1.)
The design of the joint shown in the drawing is only one form of construction of the present invention. The mentioned details may mechanically be connected in any other suitable way. The bearing 5 and the stopping parts for it may also be arranged in the shank section of the leg.
The characteristic feature of the invention is that the leg above the knee (thigh) is rotatably connected with the leg below the knee (shin) by one or plural double links that cooperate parallelly, the links being rotatably attached around If a centre fixed to the leg above the knee and like- 0 wise rotatably attached around a centre fixed to the leg below the knee and further by a bolt connecting the links, the links being so arranged that they at different movements and moments of the walk permit the leg to shorten and lengthen, and further that when the leg below the knee is loaded the leg is prevented from bending in angle to the leg above the knee by properly arranged stopping surfaces.
I do not wish to be limited as to details of construction. These may be modified in several respects without departing from the spirit of my invention.
I claim:
1. Knee joint for artificial legs, comprising a pair of links rotatably connected to the thigh section of the leg just above the knee, and another pair of links rotatably connected to the shin section of the leg just below the knee, said two pairs of links forming an angle with each other and being, in the angle point, rotatably connected to each other by means of a bolt, a stop in the thigh section of the leg for limiting the downward movement of said bolt, and supporting and stopping surfaces on the thigh section and on the shin section of the leg, located in front of and behind the centre line of the knee joint, said surfaces being in contact with each other in the lengthened position of the leg.
2. Knee joint according to claim 1, characterised in that a stop is arranged in the thigh section of the leg for limiting the upward movement of the angle point bolt.
LUDVIG HJALMAR SIMON SSON.
US199590A 1937-04-10 1938-04-02 Artificial knee joint Expired - Lifetime US2211298A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE2211298X 1937-04-10

Publications (1)

Publication Number Publication Date
US2211298A true US2211298A (en) 1940-08-13

Family

ID=20424979

Family Applications (1)

Application Number Title Priority Date Filing Date
US199590A Expired - Lifetime US2211298A (en) 1937-04-10 1938-04-02 Artificial knee joint

Country Status (1)

Country Link
US (1) US2211298A (en)

Similar Documents

Publication Publication Date Title
US3823424A (en) Artificial leg with stable link-type knee joint
US2475372A (en) Artificial foot(two-link)
US2667644A (en) Anatomical knee and hydraulic snubber
US1289580A (en) Artificial foot.
US2568051A (en) Artificial leg
CN105873546B (en) Artificial limb knee-joint
WO1996007378A1 (en) Improved knee joint mechanism for knee disarticulation prosthesis
US61780A (en) Alexander t
US20200085596A1 (en) Foot prosthesis comprising a damping element
GB1405382A (en) Knee-joint prosthesis or leg brace
US2749557A (en) Adjustable ankle joint for an artificial limb
US2211298A (en) Artificial knee joint
US2480856A (en) Leg prosthesis
US2690176A (en) Spreader for leg braces
US2530286A (en) Foot control for artificial legs
US20050154473A1 (en) Prosthetic knee mechanism
US20180147073A1 (en) Lower limb articulation for bipedal locomotion
KR20070032026A (en) Artificial foot
US2594752A (en) Joint construction for artificial limbs
US2071711A (en) Automatic knee-locking device
US2570382A (en) Leg brace knee joint
US2466134A (en) Knee joint for artificial legs
US1479297A (en) Artificial limb and harness therefor
US2430584A (en) Artificial leg
US2098067A (en) Artificial foot, joint, and ankle