CA2253631A1 - Leg prosthesis damping device - Google Patents

Leg prosthesis damping device Download PDF

Info

Publication number
CA2253631A1
CA2253631A1 CA002253631A CA2253631A CA2253631A1 CA 2253631 A1 CA2253631 A1 CA 2253631A1 CA 002253631 A CA002253631 A CA 002253631A CA 2253631 A CA2253631 A CA 2253631A CA 2253631 A1 CA2253631 A1 CA 2253631A1
Authority
CA
Canada
Prior art keywords
spring device
sleeves
spring
outer sleeve
sleeve
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.)
Abandoned
Application number
CA002253631A
Other languages
French (fr)
Inventor
Lutz Biedermann
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.)
Biedermann Motech GmbH and Co KG
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
Publication of CA2253631A1 publication Critical patent/CA2253631A1/en
Abandoned legal-status Critical Current

Links

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
    • 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
    • A61F2/76—Means for assembling, fitting or testing prostheses, e.g. for measuring or balancing, e.g. alignment means
    • 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
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30108—Shapes
    • A61F2002/30199—Three-dimensional shapes
    • A61F2002/30224—Three-dimensional shapes cylindrical
    • A61F2002/30235—Three-dimensional shapes cylindrical tubular, e.g. sleeves
    • 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
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30331—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit
    • A61F2002/30362—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit with possibility of relative movement between the protrusion and the recess
    • A61F2002/30364—Rotation about the common longitudinal axis
    • A61F2002/30367—Rotation about the common longitudinal axis with additional means for preventing said 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
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30331—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit
    • A61F2002/30362—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit with possibility of relative movement between the protrusion and the recess
    • A61F2002/3037—Translation along the common longitudinal axis, e.g. piston
    • A61F2002/30372—Translation along the common longitudinal axis, e.g. piston with additional means for limiting said translation
    • 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
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30433—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements using additional screws, bolts, dowels, rivets or washers e.g. connecting screws
    • 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
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30476—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism
    • A61F2002/30507—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism using a threaded locking member, e.g. a locking screw or a set screw
    • 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
    • A61F2002/5003—Prostheses not implantable in the body having damping means, e.g. shock absorbers
    • 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
    • A61F2002/5007—Prostheses not implantable in the body having elastic means different from springs, e.g. including an elastomeric insert
    • 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
    • A61F2002/5072—Prostheses not implantable in the body having spring elements
    • A61F2002/5073—Helical springs, e.g. having at least one helical spring
    • 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
    • A61F2002/5081—Additional features
    • A61F2002/5084—Additional features telescopic
    • 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
    • A61F2002/607—Lower legs
    • 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
    • A61F2/66—Feet; Ankle joints
    • A61F2002/6614—Feet
    • 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
    • A61F2220/00—Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2220/0025—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • 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
    • A61F2220/00—Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2220/0025—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2220/0033—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementary-shaped recess, e.g. held by friction fit
    • 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
    • A61F2220/00—Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2220/0025—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2220/0041—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements using additional screws, bolts, dowels or rivets, e.g. connecting screws
    • 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
    • A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2230/0063—Three-dimensional shapes
    • A61F2230/0069—Three-dimensional shapes cylindrical

Landscapes

  • Health & Medical Sciences (AREA)
  • Transplantation (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Cardiology (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Prostheses (AREA)

Abstract

Disclosed is a damping device for a leg prosthesis, comprising a tubular casing consisting of an outer sleeve (5) with a bottom (7) on one end and another open end, and an inner sleeve (6) which can slide backwards and forwards in an axial direction. A pressure spring (12) is arranged on the inside between both sleeves. Both sleeves can move between an expanded position and a retracted position. The pressure spring (12) is chosen in such a way that it exhibits a pre-determined initial tension even in an expanded position.

Description

CA 022~3631 1998-11-04 SPRING DEVICE FOR A LEG PROSTHESIS

The invention relates to a spring device for a leg prosthesis.
When walking with a leg prosthesis the hip and the back is subject to a considerable shock at every step. It is known to dampen this shock by providing dampening means bet-ween two members attached to the residual limb and to the foot, resp. Such dampening means comprises two interfitting sleeves movable relative to each other in axial direction and a compression ring disposed in the interior of the two sleeves and made of a resin material. The compression ring is expanded in normal position, compressed to absorb the shock when walking and again expanded when relieved.
A spring for a prosthesis is disclosed in DE 295 16 455 Ul and DE 91 12 005 Ul.
It is the object of the invention to provide a spring device which better supports the walking movement of the patient and moreover allows an individual adjustment to the patient.
This object is achieved by the spring device defined in claim 1. This spring device provides not only a dampening action when lowering the heel, but also a restoring force for pushing the toes. Furthermore, the device can be manu-factured at low cost and is therefore suitable for a broad range of applications.
Further developments of the invention are defined in the subclaims.
Further features and advantages of the invention will be apparent from the description of the embodiments with reference to the Figures. In the Figures:
Fig. 1 is a side view of a prosthesis with a spring device;
Fig. 2 shows a cross-section through a first embodiment of the spring device;
Fig. 3 is a cross-sectional representation;
Klso CA 022~3631 1998-11-04 Fig. 4 is a side view of both embodiments;
Fig. 5 is a view corresponding to the representation in Fig. 2; and Fig. 6 is a view corresponding to the representation in Fig. 3.
As shown in Fig. 1 a leg prosthesis comprises a foot member 1, a connection member 2 receiving a schematically indicated lower leg or thigh and a tubular member 3 connect-ing the foot member to the connection member.
The tubular member according to the invention is formed as a spring device. The spring device comprises a tubular housing 4 formed by an outer sleeve 5 and an inner sleeve 6 having a portion projecting into the outer sleeve. The inte-rior of the outer sleeve 5 is cylindrically formed. It has a bottom 7 at one end thereof and an open end opposite to the bottom. The inner sleeve 6 has an open free end 8 at the side facing the bottom 7 of the outer sleeve and an inter-mediate bottom 9 at a predetermined distance from the free end. The second end 10 of the inner sleeve 6 opposite to the free end 8 is adapted for connection with a coupling member 11 of the foot member 1 in usual manner. A compression spring 12 is disposed between the bottom 7 and the inter-mediate bottom 9. The inner sleeve 6 has a cylindrical outer surface corresponding to the inner form of the outer sleeve 5 to provide for insertion of a predetermined portion of the inner sleeve into the outer sleeve and for reciprocating axial movement therein.
As best shown in Figs. 2 and 4 the outer sleeve 5 com-prises a slot 13 extending in axial direction for a prede-termined length. The outer sleeve 5 comprises a key 14 fixed thereto by means of a bolt 15 which is radially screwed into the inner sleeve in the region of the intermediate bottom. The extension of the slot 13 and the axial dimension of the key 14 are chosen to allow reci-procating movement of the two sleeves between the expanded position shown in Figs. 2 and 4 whereby the key strikes the lower edge 16 of the slot and a compressed position whereby CA 022~3631 1998-11-04 the key strikes the upper edge 17 of the slot. The distance of the intermediate bottom 9 from the free end 8 is chosen to provide for a predetermined prestress of the compression spring 12 arranged between the bottom 7 and the intermediate bottom 9 in the expanded position shown in Fig. 2.
As shown in Fig. 2 the outer sleeve comprises a belt-shaped slide bearing 18 close to its free end opposite to the bottom 7. The outer sleeve 5 further comprises a second belt-shaped slide bearing 19 at a position close to the free end 8 of the inner sleeve 6 and adjacent thereto in expanded position. The slide bearings 18, 19 are each made of Teflon or a material having comparable properties. Moreover, an O-ring seal 20 is disposed at the free end of the outer sleeve 5 for preventing dust or the like from entering into the sprlng devlce.
The two slide bearings 18, 19 obviate the stick-shift phenomenon observed when expanding and compressing the springs of known damping members.
The spring device shown in the Figs. 2 and 4 has its second end 10 attached to the foot member 1 and a flange 21 opposite to this second end for attachment to the connection member 2. In operation the spring 12 dampens the shock or impact generated by a step. The prestress of the spring ef-fects not only the dampening action, but also a restoration of the spring member into the expanded position by the spring force. The key 14 is guided along the slot 13 so as to avoid any rotation between the foot and the residual limb. Canting is opposed by the sliding movement of the second sleeve within the first sleeve. Thus, the structur-ally simple spring device makes the use of a leg prosthesis considerably more comfortable.
The modified embodiment of the spring device shown in Fig. 3 differs from the above-described embodiment only by a damping member 22 provided in addition to the compression spring 12. All remaining features of the spring device cor-respond to the above-described first embodiment.

CA 022~363l l998-ll-04 The damping member 22 iS formed as a cylinder having a length corresponding to the distance between the surface of the bottom 7 facing the intermediate bottom 9 and the sur-face of the intermediate bottom 9 facing the bottom 7 in the expanded position shown in Fig. 3. The diameter of the cyl-inder corresponds substantially to the inner diameter of the compression spring 12 SO as to support the cylinder therein.
Preferably, the damping member 22 iS made of polyurethane or a material having comparable damping properties.
In operation the damping member 22 helps to dampen the step impact, whereas the spring 12 contributes to the damp-ening action as well as to the effect of restoring the spring member into the expanded position shown in the above-described manner. The combination of the damping member and the spring member further allows to adapt the spring charac-teristic to the desired walking requirements of the person wearing the prosthesis.
The embodiment shown in Fig. 5 has all the features of the embodiment shown in Fig. 2. Additionally, an adjusting screw 23 iS provided for effecting a prestress of the spring 12. The adjusting screw 23 extends coaxially with the sleeves 5, 6. The screw passes through a bore in the inter-mediate bottom 9 sealed by means of a seal 26 and its head 24 as well as a washer 25 abut the outer side of the inter-mediate bottom 9. The free end of the screw extends through a likewise coaxial bore in the bottom 7 and engages a nut 27 abutting the outer side of the bottom 7.
The embodiment shown in Fig. 6 has all features of the embodiment of Fig. 3. In addition thereto it has an adjust-ment screw 23 corresponding in any respect to the embodiment shown in Fig. 5, with head and nut, and extending through a coaxial bore within the damping member 22.
In operation the prestress of the spring 12 or 12 and 22, resp., is adjusted, using the adjusting screw 23, in de-pendence on the weight and the degree of activity of the patient.

Claims (9)

1. Spring device for a leg prosthesis, comprising a tubular housing having an outer sleeve (5) with a bottom (7) at one end thereof and an open other end, and an inner sleeve (6) having at least a portion disposed within the outer sleeve (5) and dimensioned to allow axial sliding movement of the inner sleeve (6) relative to the outer sleeve (5), the inner sleeve having a free open end (8) facing the bottom (7) and, at a distance from the free end (8), an abutment for a compression spring, and a compression spring (12) disposed between the bottom (7) and the abutment (9) in prestressed condition, the bottom end (7) of the outer sleeve (5) and the end of the inner sleeve (5) opposite to the free end (8) being provided with corresponding members (10, 21) for attachment to a residual limb connection member (2) and a foot member (11, 1), resp.
2. A spring device according to claim 1, characterized in that the two sleeves (5, 6) are guided relative to each other to prevent a rotating movement.
3. The spring device according to claim 2, characterized in that one of the sleeves (5) has a slot (13) extending in axial direction and the other sleeve (6) comprises a guide member (14) engaging the slot (13).
4. Spring device according to any of the claims 1 to 3, characterized in that both sleeves (5, 6) comprise guide or slide bearings (18, 19) provided in the region of their respective free ends.
5. Spring device according to claim 4, characterized in that at least one of the slide bearings (18, 19) is formed as an annular guide belt.
6. Spring device according to any of the claims 1 to 5, characterized in that a stop (16, 17) is provided for de-limiting the relative movement of both sleeves (5, 6) between a first and a second position.
7. Spring device according to any of the claims 3 to 6, characterized in that the length of the slot (13) and the guide member (14) are so dimensioned that the stops (16, 17) correspond to the first and second position, resp.
8. Spring device according to any of the claims 1 to 7, characterized in that an adjusting member (23) is provided for effecting and adjusting the prestress.
9. Spring device according to claim 8, characterized in that the adjusting member is formed as an adjusting screw (23).
CA002253631A 1997-03-05 1998-03-04 Leg prosthesis damping device Abandoned CA2253631A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19709006.0 1997-03-05
DE19709006A DE19709006A1 (en) 1997-03-05 1997-03-05 Spring device for a prosthetic leg
PCT/EP1998/001210 WO1998038951A1 (en) 1997-03-05 1998-03-04 Leg prosthesis damping device

Publications (1)

Publication Number Publication Date
CA2253631A1 true CA2253631A1 (en) 1998-09-11

Family

ID=7822338

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002253631A Abandoned CA2253631A1 (en) 1997-03-05 1998-03-04 Leg prosthesis damping device

Country Status (9)

Country Link
EP (1) EP0910318B1 (en)
JP (1) JP3181298B2 (en)
KR (1) KR20000065189A (en)
CN (1) CN1219116A (en)
AT (1) ATE193434T1 (en)
CA (1) CA2253631A1 (en)
DE (2) DE19709006A1 (en)
NO (1) NO985161L (en)
WO (1) WO1998038951A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6488717B1 (en) 2001-08-24 2002-12-03 Mccoll Mack Edward Prosthetic leg
US10881533B2 (en) 2014-05-07 2021-01-05 Ottobock Se & Co. Kgaa Prosthetic foot including a heel cap and interchangeable heel-side spring-damper

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR19990084023A (en) * 1999-09-07 1999-12-06 김홍빈 The training gear hoof knee prosthesis
RU2266722C2 (en) 2000-01-20 2005-12-27 Массачуссеттс Инститьют Оф Текнолоджи Electronically controlled knee joint prosthesis, prosthesis unit and method for controlling electronic joint prosthesis rotation
EP1531766B1 (en) 2002-08-22 2012-08-01 Victhom Human Bionics Inc. Actuated leg prosthesis for above-knee amputees
US7736394B2 (en) 2002-08-22 2010-06-15 Victhom Human Bionics Inc. Actuated prosthesis for amputees
US7101487B2 (en) 2003-05-02 2006-09-05 Ossur Engineering, Inc. Magnetorheological fluid compositions and prosthetic knees utilizing same
US6969408B2 (en) 2003-09-30 2005-11-29 Ossur Engineering, Inc. Low profile active shock module prosthesis
US20050107889A1 (en) 2003-11-18 2005-05-19 Stephane Bedard Instrumented prosthetic foot
US7815689B2 (en) 2003-11-18 2010-10-19 Victhom Human Bionics Inc. Instrumented prosthetic foot
JP5013881B2 (en) 2004-02-12 2012-08-29 オサール ハゥーエッフ System and method for motion controlled foot unit
US7896927B2 (en) 2004-02-12 2011-03-01 össur hf. Systems and methods for actuating a prosthetic ankle based on a relaxed position
CN1984623B (en) 2004-03-10 2011-04-13 奥瑟Hf公司 Control system and method for a prosthetic knee
EP1848380B1 (en) 2004-12-22 2015-04-15 Össur hf Systems and methods for processing limb motion
EP1835870B1 (en) * 2005-01-13 2011-05-18 Össur hf A damping device for a prosthesis
CN101151071B (en) 2005-02-02 2010-12-08 奥瑟Hf公司 Prosthetic and orthotic systems usable for rehabilitation
US8801802B2 (en) 2005-02-16 2014-08-12 össur hf System and method for data communication with a mechatronic device
SE528516C2 (en) 2005-04-19 2006-12-05 Lisa Gramnaes Combined active and passive leg prosthesis system and a method for performing a movement cycle with such a system
EP1942843B1 (en) 2005-09-01 2017-03-01 Össur hf System and method for determining terrain transitions
US8048172B2 (en) 2005-09-01 2011-11-01 össur hf Actuator assembly for prosthetic or orthotic joint
WO2008034099A2 (en) 2006-09-15 2008-03-20 össur hf Method and apparatus for decreasing build height of prosthetic products
WO2009120637A1 (en) 2008-03-24 2009-10-01 Ossur Hf Transfemoral prosthetic systems and methods for operating the same
DE102010034880B4 (en) * 2010-08-19 2013-06-13 Horst Gingel prosthetic leg
US9060884B2 (en) 2011-05-03 2015-06-23 Victhom Human Bionics Inc. Impedance simulating motion controller for orthotic and prosthetic applications
US9017419B1 (en) 2012-03-09 2015-04-28 össur hf Linear actuator
CN103169554B (en) * 2013-02-25 2014-12-24 西南交通大学 Assisting-type bearing system antidumping multiple-thread damper for exoskeleton
WO2014133975A1 (en) 2013-02-26 2014-09-04 össur hf Prosthetic foot with enhanced stability and elastic energy return
US9949850B2 (en) 2015-09-18 2018-04-24 Össur Iceland Ehf Magnetic locking mechanism for prosthetic or orthotic joints
RU2697225C1 (en) * 2018-07-13 2019-08-13 Михаил Сергеевич Беллавин Leg prosthesis

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR371291A (en) * 1906-11-09 1907-03-04 Louis Guyot Damper recovery pestle for artificial legs, crutches and other orthopedic devices
FR626782A (en) * 1926-05-27 1927-09-19 Shock absorber for artificial legs for disabled
CA1246301A (en) * 1985-11-15 1988-12-13 Guy G. Martel Above knee leg prosthesis
DE9112005U1 (en) * 1991-07-12 1992-01-02 Enidine GmbH, 7858 Weil Prosthesis for the limbs of a body, especially leg prosthesis
DE29516455U1 (en) * 1995-10-17 1996-02-15 Kostner, Robert, 92546 Schmidgaden Spring-loaded / cushioned lower leg for prostheses

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6488717B1 (en) 2001-08-24 2002-12-03 Mccoll Mack Edward Prosthetic leg
US10881533B2 (en) 2014-05-07 2021-01-05 Ottobock Se & Co. Kgaa Prosthetic foot including a heel cap and interchangeable heel-side spring-damper

Also Published As

Publication number Publication date
CN1219116A (en) 1999-06-09
WO1998038951A1 (en) 1998-09-11
JPH11510727A (en) 1999-09-21
KR20000065189A (en) 2000-11-06
NO985161L (en) 1998-12-04
DE59800165D1 (en) 2000-07-06
NO985161D0 (en) 1998-11-05
EP0910318B1 (en) 2000-05-31
DE19709006A1 (en) 1998-09-24
JP3181298B2 (en) 2001-07-03
ATE193434T1 (en) 2000-06-15
EP0910318A1 (en) 1999-04-28

Similar Documents

Publication Publication Date Title
CA2253631A1 (en) Leg prosthesis damping device
US6402788B1 (en) Prosthetic pylon having an enclosed compressible volume of fluid to support a patient's weight
US6296669B1 (en) Prosthetic suspension insert
US5800563A (en) Impact reducing prosthetic pylon
DE60021569D1 (en) Fussprothese mit stossdämpfer
RU2245691C2 (en) Torsion unit of exoprosthesis
US5888214A (en) Prosthetic leg apparatus and method
JP3181957B2 (en) Hydraulic pressure control unit for prosthesis
US6302918B1 (en) Shock-and torque absorber in a leg prothesis
US6080197A (en) Shock absorbing device for an artificial leg
CN103635161A (en) Polycentric knee joint prosthesis for extreme affordability
GB2305363A (en) Telescopic shin prosthesis
EP4098230A2 (en) Shock absorber system for a prosthesis
EP3787564B1 (en) Spacer unit for use in a movable joint of a prosthetic or orthopedic system
JPH0975382A (en) Knee joint for artificial leg
TH14927A3 (en) Four-point pivot prosthetic knee
TH14927C3 (en) Four-point pivot prosthetic knee
WO2024152107A1 (en) Self-adjusting socket for lower limb prosthesis

Legal Events

Date Code Title Description
FZDE Discontinued