Patent US4894033A successfully refreshed from Google Patents.
US4894033A
Expired / Lapsed
US
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Multipurpose and inflatable raft
Assignee: Individual
•
Filing: 1988-02-19
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Granted: 1990-01-16
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Expires: 2008-02-19
Abstract
Abstract A multipurpose and inflatable raft mainly composed of an inflatable circular raft unit, an inflatable shperical raft unit and an inflatable back seat, wherein said circular raft unit comprising several retainer plates for the connection with the retaining rings of the spherical raft unit so as to form a raft of high buoyance, and by means of fixtures attached to the circular raft unit for the fixation of pedalling device to form a pedalling raft, and by means of locating plates arranged bilaterally to the circular raft unit for the fixation of either oar for use in water or braking rod for use in snow-skiing as a braking device.
Inventors
- 👤 Herry Chang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:50
CPC Classifications
B; B63; B63B; B63B34/00; B63B34/50; B63B34/565; B63B34/52; B63H; B63H16/00
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
137 words
A multipurpose inflatable raft comprising: an inflatable buoyant outer raft formed in a U-shape and defining a longitudinal axis, with each leg of said U-shaped portion being essentially parallel with said longitudinal axis, wherein said outer raft unit comprises a plurality of retainer plates attached in spaced relationship along the top, bottom and outer surfaces of said outer raft, and a plurality of retaining rings attached in spaced relationship along the outer surface of said outer raft; an inflatable buoyant inner raft further comprising a plurality of retaining rings attached in a spaced relationship along the top periphery thereof and the bottom periphery thereof, wherein said inner raft may be positioned at spaced locations along said longitudinal axis whereby said retainer plates on said outer raft may be fastened to said retaining rings on said inner raft.
Claim 2
Dependent Claim
137 words
A multipurpose inflatable raft comprising: an inflatable buoyant outer raft formed in a U-shape and defining a longitudinal axis, with each leg of said U-shaped portion being essentially parallel with said longitudinal axis, wherein said outer raft unit comprises a plurality of retainer plates attached in spaced relationship along the top, bottom and outer surfaces of said outer raft, and a plurality of retaining rings attached in spaced relationship along the outer surface of said outer raft; an inflatable buoyant inner raft further comprising a plurality of retaining rings attached in a spaced relationship along the top periphery thereof and the bottom periphery thereof, wherein said inner raft may be positioned at spaced locations along said longitudinal axis whereby said retainer plates on said outer raft may be fastened to said retaining rings on said inner raft.
Claim 3
Dependent Claim
22 words
The multipurpose inflatable raft of claim 1, further comprising a pair of fixtures attached to opposite inner sides of said outer raft.
Claim 4
Dependent Claim
22 words
The multipurpose inflatable raft of claim 1, further comprising a pair of oarlocks attached to opposite outside portions of said outer raft.
Claim 5
Dependent Claim
27 words
The multipurpose inflatable raft of claim 1, further comprising an inflatable seat containing a plurality of retainer plates connectable to said retainer rings on said inner raft.
Claim 6
Dependent Claim
32 words
The multipurpose and inflatable raft of claim 2, further comprising a pedaling device attached to said fixtures wherein said pedaling device comprises propeller means for propelling said inflatable raft through the water.
Claim 7
Dependent Claim
37 words
The multipurpose and inflatable raft of claim 5, wherein each of said fixtures comprises a flute having a cylindrical opening therein, and wherein said pedaling devices further comprises a supporting rod which is inserted into said flute.
Claim 8
Dependent Claim
22 words
The multipurpose and inflatable raft of claim 5, wherein said pedaling device further comprises an electric motor coupled to said propelling means.
Claim 9
Dependent Claim
55 words
The multipurpose and inflatable raft of claim 1, further comprising a rear retainer attached to the rearward portion of said inner raft, an underside retainer attached at the underside of the rearward portion of said inner raft, and a steering device rotatably connected to said inner raft by said rear retainer and said underside retainer.
Claim 10
Dependent Claim
14 words
The multipurpose and inflatable raft of claim 1, wherein said inner raft is elliptical-shaped.
Claim 11
Dependent Claim
14 words
The multipurpose and inflatable raft of claim 1, wherein said inner raft is circular-shaped.
Claim 12
Dependent Claim
24 words
The multipurpose and inflatable raft of claim 1, wherein a plurality of inner rafts can be mounted between said legs in said outer raft.
Claim 13
Dependent Claim
26 words
The multipurpose and inflatable raft of claim 1, wherein said outer raft further comprises a mounting fixture on the rearward portion of each of said legs.
References Cited (Backward Citations)
US3185125A
Cited
US3221696A
Cited
FR1432404A
Cited
US3455571A
Cited
US3518958A
Cited
US4376420A
Cited
GB2108435A
Cited
US4708676A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-01-15 | 1993-07-17 | 1994-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-15 | 1997-07-17 | 1998-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-15 | 2001-07-17 | 2002-01-16 | $7700.00 | Window Closed / Lapsed |