US4948385A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Training fin device for swimming
Assignee: Individual
•
Filing: 1988-12-30
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Granted: 1990-08-14
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Expires: 2008-12-30
Abstract
Abstract Disclosed herein is a training fin for swimming which includes a foot section having an enclosure for retaining a user's foot in the fin and a tail section attached to the foot section. The tail section has a surface area of approximately between 0.5 and 1.0 times the surface area of the foot section.
Inventors
- 👤 Martin P. Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:59
CPC Classifications
A; A63; A63B; A63B31/00; A63B31/08; A63B31/10; A63B31/11
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
78 words
A training fin for swimming, comprising: a foot section having an enclosure means for retaining a user's foot to the fin, the foot section having a predetermined surface area defined by that portion of the foot section which directly covers the foot and specifically excluding any overhand of the foot section; and a tail section attached to the foot section, the tail section surface area being between 0.5 and 1.0 times the surface area of the foot section.
Claim 2
Dependent Claim
78 words
A training fin for swimming, comprising: a foot section having an enclosure means for retaining a user's foot to the fin, the foot section having a predetermined surface area defined by that portion of the foot section which directly covers the foot and specifically excluding any overhand of the foot section; and a tail section attached to the foot section, the tail section surface area being between 0.5 and 1.0 times the surface area of the foot section.
Claim 3
Dependent Claim
51 words
A training fin as set forth in claim 1, wherein the tail section comprises a tapered plane having a base at the juncture of the tail and foot sections, the tapered plane terminating at a finishing edge and wherein the tail section is tapered from the base to the finishing edge.
Claim 4
Dependent Claim
22 words
A training fin as set forth in claim 2, wherein there is a constant taper from the base to the finishing edge.
Claim 5
Dependent Claim
27 words
A training fin as set forth in claim 2, wherein the base is between 5/8" and 3/4" thick and finishing edge is between 1/8" to 3/16" thick.
Claim 6
Dependent Claim
23 words
A training fin as set forth in claim 3, wherein the tapered plane is an increasingly flexible plane from base to finishing edge.
Claim 7
Dependent Claim
17 words
A training fin as set forth in claim 3, wherein the tapered plane is flat and smooth.
Claim 8
Dependent Claim
34 words
A training fin as set forth in claim 3, wherein the tail section has diverging outside edges extending from the base to the finishing edge which diverge from the base to the finishing edge.
Claim 9
Dependent Claim
31 words
A training fin as set forth in claim 7, wherein the finishing edge is at least 1.5 times as wide as the base as a result of the diverging outside edges.
Claim 10
Dependent Claim
38 words
A training fin as set forth in claim 8, wherein the outside edges have a trim edge adjacent the juncture of each outside edge and the finishing edge and wherein the trim edges are parallel to one another.
Claim 11
Dependent Claim
21 words
A training fin as set forth in claim 2, wherein the tapered plane joins the foot section at a predetermined angle.
Claim 12
Dependent Claim
74 words
A training fin for swimming, comprising: a foot section having an enclosure means for retaining a user's foot to the fin, the foot section having a predetermined surface area defined by that portion of the foot section which directly covers the foot and specifically excluding any overhand; and a tail section attached to the foot section, the tail section surface area being between 0.5 and 0.8 times the surface area of the foot section.
Claim 13
Dependent Claim
74 words
A training fin for swimming, comprising: a foot section having an enclosure means for retaining a user's foot to the fin, the foot section having a predetermined surface area defined by that portion of the foot section which directly covers the foot and specifically excluding any overhand; and a tail section attached to the foot section, the tail section surface area being between 0.5 and 0.8 times the surface area of the foot section.
Claim 14
Dependent Claim
67 words
A training fin for swimming, comprising: a foot section defined by an enclosure for retaining a user's foot to the fin and having a predetermined surface area defined by that portion of the foot section which directly covers the foot; and a tail section attached to the foot section, the tail section surface area being between 0.5 and 1.0 times the surface area of the foot section.
Claim 15
Dependent Claim
67 words
A training fin for swimming, comprising: a foot section defined by an enclosure for retaining a user's foot to the fin and having a predetermined surface area defined by that portion of the foot section which directly covers the foot; and a tail section attached to the foot section, the tail section surface area being between 0.5 and 1.0 times the surface area of the foot section.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-08-13 | 1994-02-12 | 1994-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-13 | 1998-02-12 | 1998-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-13 | 2002-02-12 | 2002-08-14 | $7700.00 | Window Closed / Lapsed |