Patent US2017560A successfully refreshed from Google Patents.
Patent US3665535A successfully refreshed from Google Patents.
US3665535A
Expired / Lapsed
US
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Swim fin
Assignee: Individual
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Filing: 1970-08-13
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Granted: 1972-05-30
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Expires: 1990-08-13
Abstract
Abstract A swim fin having a rigid or flexible web pivotally mounted on a rigid frame extended forwardly from the toe of the user. The rigid web is pivoted intermediate its longitudinal ends. A flexible web is controlled with respect to longitudinal curvature. Both forms are limited in the extent of angular movement available.
Inventors
- 👤 James B Picken
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:21
CPC Classifications
A; A63; A63B; A63B31/00; A63B31/08; A63B31/10; A63B31/11
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
133 words
In a swim fin: first means for attachment to the foot of a swimmer; a support secured to said first means and extending longitudinally outward therefrom in a forward direction relative to the toe of said first means; a rigid web frame pivotally connected to said support about a transverse axis located thereon spaced forwardly from the toe of said first means; said rigid web frame comprising an integral rigid plate having a transverse width in excess of its length and presenting oppositely facing solid smooth surfaces for water contact, said transverse axis being located through the plate at a location intermediate the ends thereof; and means operatively connected between the support and web frame for limiting the extent of angular movement of said web frame relative to said support about said axis.
Claim 2
Dependent Claim
133 words
In a swim fin: first means for attachment to the foot of a swimmer; a support secured to said first means and extending longitudinally outward therefrom in a forward direction relative to the toe of said first means; a rigid web frame pivotally connected to said support about a transverse axis located thereon spaced forwardly from the toe of said first means; said rigid web frame comprising an integral rigid plate having a transverse width in excess of its length and presenting oppositely facing solid smooth surfaces for water contact, said transverse axis being located through the plate at a location intermediate the ends thereof; and means operatively connected between the support and web frame for limiting the extent of angular movement of said web frame relative to said support about said axis.
Claim 3
Dependent Claim
37 words
A swim fin as set out in claim 1 wherein said support comprises: a pair of transversely spaced arms having their respective ends fixed to the first means and pivotally connected to said plate at said axis.
Claim 4
Dependent Claim
86 words
In swim fin: first means for attacHment to a foot; a fin-like member in the form of a web having a controllable configuration during use; rigid frame means fixed to said first means for supporting said fin-like member, said frame means including a pivotal connection to said fin-like member about a transverse axis located across the fin-like member; and means operatively connected between said frame means and said fin-like member for limiting pivotal movement of said fin-like member relative to said frame means about said axis.
Claim 5
Dependent Claim
86 words
In swim fin: first means for attacHment to a foot; a fin-like member in the form of a web having a controllable configuration during use; rigid frame means fixed to said first means for supporting said fin-like member, said frame means including a pivotal connection to said fin-like member about a transverse axis located across the fin-like member; and means operatively connected between said frame means and said fin-like member for limiting pivotal movement of said fin-like member relative to said frame means about said axis.
Claim 6
Dependent Claim
127 words
In a swim fin: first means for attachment to a foot; a rigid frame fixed to said first means and extending forwardly to the toe thereof along a path substantially parallel to the leg of a swimmer when using the fin; a web in the form of a transverse sheet of flexible material; web frame means pivotally mounted to said rigid frame about a transverse axis forward of said first means for forming the web in a longitudinal concave configuration in response to kicking motion of the foot and directed toward its direction of movement in the water; and means operatively connected between the web frame means and said rigid frame for limiting angular motion of said web frame relative to said rigid frame about said axis.
Claim 7
Dependent Claim
127 words
In a swim fin: first means for attachment to a foot; a rigid frame fixed to said first means and extending forwardly to the toe thereof along a path substantially parallel to the leg of a swimmer when using the fin; a web in the form of a transverse sheet of flexible material; web frame means pivotally mounted to said rigid frame about a transverse axis forward of said first means for forming the web in a longitudinal concave configuration in response to kicking motion of the foot and directed toward its direction of movement in the water; and means operatively connected between the web frame means and said rigid frame for limiting angular motion of said web frame relative to said rigid frame about said axis.
Claim 8
Dependent Claim
84 words
A swim fin as set out in claim 3 wherein said fin-like member comprises: a transverse frame element pivotally connected to said rigid frame means at said axis; a plurality of transversely spaced guides fixed to and extending forwardly from said transverse frame element, each guide having longitudinally convex upper and lower surfaces facing one another and respectively aligned across said transverse frame element; said web being flexible and secured across the rear ends of said guides between the upper and lower surfaces thereof.
Claim 9
Dependent Claim
41 words
A swim fin as set out in claim 5 wherein said rigid frame means comprises a pair of transversely spaced arms having their respective ends fixed to said first means and pivotally connected to said transverse frame element at said axis.
Claim 10
Dependent Claim
118 words
In a swim fin: first means for attachment to the foot of a swimmer; a rigid support secured to said first means and extending longitudinally outward therefrom in a forward direction relative to the toe of said first means; a rigid web frame pivotally connected to said support by a free pivotal connection between the web frame and said support about a transverse axis located on the support at a position spaced forwardly from said first means; and means operatively connected between the support and web frame for permitting free pivotal movement of the web frame relative to the support about said transverse axis, while limiting the maximum amount of such movement to each side of said support.
Claim 11
Dependent Claim
118 words
In a swim fin: first means for attachment to the foot of a swimmer; a rigid support secured to said first means and extending longitudinally outward therefrom in a forward direction relative to the toe of said first means; a rigid web frame pivotally connected to said support by a free pivotal connection between the web frame and said support about a transverse axis located on the support at a position spaced forwardly from said first means; and means operatively connected between the support and web frame for permitting free pivotal movement of the web frame relative to the support about said transverse axis, while limiting the maximum amount of such movement to each side of said support.
Claim 12
Dependent Claim
38 words
A swim fin as set out in claim 7 wherein said rigid web frame comprises: an integral rigid plate having a transverse width in excess of its length and presenting oppositely facing solid smooth surfaces for water contact.
Claim 13
Dependent Claim
57 words
A swim fin as set out in claim 7 wherein said rigid web frame comprises: an integral rigid plate having a transverse width in excess of its length and presenting oppositely facing solid smooth surfaces for water contact; and perpendicular rigid guide fins at the respective transverse sides of said plate extending outwardly beyond the surfaces thereof.
Claim 14
Dependent Claim
81 words
A swim fin as set out in claim 7 wherein said rigid web frame comprises: a transverse frame element pivotally connected to said support at said axis; a plurality of transversely spaced guides fixed to and extending forwardly from said transverse frame element, each guide having longitudinally convex upper and lower surfaces facing one another and respectively aligned across said transverse frame element; a flexible web secured across the rear ends of said guides between the upper and lower surfaces thereof.
Claim 15
Dependent Claim
109 words
A swim fin as set out in claim 7 wherein said rigid web frame comprises: a transverse frame element pivotally connEcted to said support at said axis; a plurality of transversely spaced guides fixed to and extending forwardly from said transverse frame elements, each guide having longitudinally convex upper and lower surfaces facing one another and respectively aligned across said transverse frame element; a flexible web secured across the rear ends of said guides between the upper and lower surfaces thereof; said support comprising a pair of transversely spaced arms having their respective ends fixed to the first means and pivotally connected to said transverse frame at said axis.
Claim 16
Dependent Claim
64 words
A swim fin as set out in claim 7, wherein said rigid web frame comprises: an integral rigid plate presenting oppositely facing solid smooth surfaces for water contact; said axis being located through the plate at a location intermediate the ends thereof; said last-named means comprising a tension member connected between said support and the end of said plate closest to said first means.
Claim 17
Dependent Claim
68 words
A swim fin as set out in claim 7 wherein said rigid web frame comprises: a rigid plate having oppositely facing solid smooth surfaces for water contact; said axis being located through the plate at a location intermediate the ends thereof; said support comprising a pair of transversely spaced arms having their respective ends fixed to the first means and pivotally connected to said plate at said axis.
References Cited (Backward Citations)
US3072932A
Cited
US3302223A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |