EP0201466A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Coil spring for transluminal implantation and planar blank for the manufacture thereof
Assignee: Medinvent SA
•
Filing: 1986-03-24
•
Granted: —
•
Expires: 2006-03-24
Abstract
Abstract Planar blank (1;3) intended for the manufacture of a coil spring (5; 7) suitable for transluminal implantation, characterized by an elongated, essentially straight mid section (9; 11) which at its ends passes over into end sections that are bent in the plane of the blank in opposite directions to form a blank having Z-shape, whereby a coil spring made from the blank (in which the spring material as seen in cross section has radially flattened shape) at its ends has a lower pitch than the mid section or no pitch at all; and a coil spring made from such blank.
Inventors
- 👤 Laurent Kropf
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 13:45
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/82; A61F2/86; A61F2/88; A61F2/02; A61F2/04; A61F2/01; A61F2/90; A61F2/91; A61F2002/016; A61F2230/00; A61F2230/0063; A61F2230/0091
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
90 words
Planar blank (1;3) intended for the manufacture of a coil spring (5;7) suitable for transluminal implantation, characterized by an elongated, essentially straight mid section (9;11) which at its ends passes over into end sections that are bent in the plane of the blank in opposite directions to form a blank having Z-shape, whereby a coil spring made from the blank (in which the spring material as seen in cross section has radially flattened shape) at its ends has a lower pitch than the mid section or no pitch at all.
Claim 2
Dependent Claim
90 words
Planar blank (1;3) intended for the manufacture of a coil spring (5;7) suitable for transluminal implantation, characterized by an elongated, essentially straight mid section (9;11) which at its ends passes over into end sections that are bent in the plane of the blank in opposite directions to form a blank having Z-shape, whereby a coil spring made from the blank (in which the spring material as seen in cross section has radially flattened shape) at its ends has a lower pitch than the mid section or no pitch at all.
Claim 3
Dependent Claim
56 words
Blank according to claim 1, characterized in that the mid section (11) as seen in the plane of the blank is smaller than the end sections (17,19) to enable the cor-responding part (29) of the coil spring made from the blank to have a lower pitch and thereby smaller distance between the turns in said part.
Claim 4
Dependent Claim
54 words
Blank according to claim 1 or 2, characterized thereby that one end section (13) is extended as compared to the other one, so that in the coil spring thus manufactured several overlapping turns (31) are formed which in a direction perpendicular to the centre line of the spring lie essentially in the same plane.
Claim 5
Dependent Claim
33 words
Blank according to claim 3, characterized thereby that said end section (13) is made outwardly tapering for the purpose of reducing the flow resistance of the coil spring (5) made from the blank.
Claim 6
Dependent Claim
43 words
Blank according to claim 1 or 2, characterized thereby that both end sections (17,19) are substantially of equal length and have a length less than the length of a complete turn in the coil spring made from the blank in an unloaded state.
Claim 7
Dependent Claim
23 words
Blank according to claim 5, characterized thereby that said length is less than about 3/4, preferably about 1/2 of said complete turn length.
Claim 8
Dependent Claim
34 words
Blank according to any preceding claim, characterized thereby that over at least the major part of its length it is provided with through-going apertures (21) as seen perpendicular to the plane of the blank.
Claim 9
Dependent Claim
27 words
Blank according to claim 7, characterized thereby that said apertures (21) are arranged in at least one row (23,25) extending in the longitudinal direction of the blank.
Claim 10
Dependent Claim
35 words
Blank according to any preceding claim, characterized thereby that the end sections (13,15:17,19) are bent over an angle (a) lying within the range about 5-40°, preferably about 10-30 0 , especially about 10-25 0 .
Claim 11
Dependent Claim
55 words
Coil spring (5,7) suitable for transluminal implantation and having essentially helix-shaped configuration, the spring material of same being radially flattened as seen in an axial cross section, characterized by a mid section (27,29) of circular cylindric shape and end sections (31,33:35,37) having, in relation to the mid section, lower pitch or a pitch of zero.
Claim 12
Dependent Claim
55 words
Coil spring (5,7) suitable for transluminal implantation and having essentially helix-shaped configuration, the spring material of same being radially flattened as seen in an axial cross section, characterized by a mid section (27,29) of circular cylindric shape and end sections (31,33:35,37) having, in relation to the mid section, lower pitch or a pitch of zero.
Claim 13
Dependent Claim
28 words
Coil spring according to claim 10, characterized thereby that said mid section (29) is made from an axially smaller material than the material of the end sections (35,37).
Claim 14
Dependent Claim
59 words
Coil spring according to claim 10 or 11, characterized thereby that one end section (31) consists of several turns which in a direction perpendicular to the centre line of the coil spring (5) lie in essentially the same plane and which in a direction towards the free end of the end section have a progressively decreasing radius of curvature.
Claim 15
Dependent Claim
38 words
Coil spring according to claim 12, characterized thereby that the material of said one end section (31) is made axially tapering towards the free end for the purpose of reducing the axial flow resistance of the coil spring.
Claim 16
Dependent Claim
37 words
Coil spring according to claim 10 or 11, characterized thereby that the material of the two end sections (35,37) has essentially the same length, said length corresponding to less than a full turn of the spring (7).
Claim 17
Dependent Claim
21 words
Coil spring according to claim 14, characterized thereby that the end sections (35,37) each extend over less than about 3/4 turn.
Claim 18
Dependent Claim
30 words
Coil spring according to any of claims 10-15, characterized thereby that the spring material over at least the major part of the spring is provided with radially through-going apertures (21).
Claim 19
Dependent Claim
35 words
Coil spring according to claim 16, characterized thereby that said apertures (21) cover such an area that the main part of the remaining spring material has a tangential width of at most about 2,5 mm.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.