Patent US4016826A successfully refreshed from Google Patents.
US4016826A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water spider
Assignee: Individual
•
Filing: 1976-04-05
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Granted: 1977-04-12
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Expires: 1996-04-05
Abstract
Abstract Four cylindrical floats with paddles are mounted upon crankshafts having double cranks thereon. The crankshafts are connected by treadle boards. When the treadles are operated by a standing person, the vehicle is propelled forward.
Inventors
- 👤 David H. Sanders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:01
CPC Classifications
B; B62; B62K; B62K3/00; B62K3/002; B63; B63H; B63H1/00; B63H1/38; B63H16/00; B63H16/08; B63H16/12; B63H16/20; B63H2016/202
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
103 words
A water vehicle comprising: a. two crank shafts, b. each crankshaft having i. axle stubs on each end, and ii. two cranks arranged port and starboard between the axle stubs, iii. the cranks having an opposed throw from the axle stub, c. treadle boards arranged one port and one starboard, d. the port treadle board journaled to the port crank of each crankshaft, e. the starboard treadle board journaled to the starboard crank of each crankshaft, f. a float mounted on each axle stub, and g. each float having an outboard face thereon, and h. paddles on said outboard face of each float.
Claim 2
Dependent Claim
103 words
A water vehicle comprising: a. two crank shafts, b. each crankshaft having i. axle stubs on each end, and ii. two cranks arranged port and starboard between the axle stubs, iii. the cranks having an opposed throw from the axle stub, c. treadle boards arranged one port and one starboard, d. the port treadle board journaled to the port crank of each crankshaft, e. the starboard treadle board journaled to the starboard crank of each crankshaft, f. a float mounted on each axle stub, and g. each float having an outboard face thereon, and h. paddles on said outboard face of each float.
Claim 3
Dependent Claim
62 words
The invention as defined in claim 1 with additional limitations of j. a patch on the bottom of each treadle board near each end thereof, k. a tube under each end of the treadle board against said patch, m. resilient means on each treadle board for biasing the tube against the patch, and n. one of said cranks journaled in each tube.
Claim 4
Dependent Claim
26 words
The invention as defined in claim 2 with an additional limitation of o. dirigible means connected to each tube for moving said tube from said stop.
Claim 5
Dependent Claim
60 words
The invention as defined in claim 2 wherein o. said resilient means is a doubled rubber strap with both ends hooked to the tube and the doubled strap reeved upward around the end of the board and back under the tube and back through the board where the bight of the strap is belayed to dowel stock above the board.
Claim 6
Dependent Claim
72 words
The invention as defined in claim 1 with additional limitations of j. the aft floats having three paddles placed thereon, k. one of said paddles being a drag paddle which is aligned with the crank nearest thereto m. so that when the port treadle board is down the port aft float will have said drag paddle projecting directly down and the starboard aft float will have said drag paddle pointing directly up.
Claim 7
Dependent Claim
25 words
The invention as defined in claim 5 with an additional limitation of n. the other two paddles are at right angles to the drag paddle.
Claim 8
Dependent Claim
26 words
The invention as defined in claim 6 with an additional limitation of o. the paddles on the forward floats the same as on the aft floats.
Claim 9
Dependent Claim
60 words
The invention as defined in claim 1 with additional limitations of j. each treadle board extending aft of the rear crankshaft, k. a guide fin set on the bottom of each treadle board aft of the rear crankshaft angling outboard m. so that when the treadle board is depressed and stationary, the guiding fin tends to turn the water vehicle.
Claim 10
Dependent Claim
20 words
The invention as defined in claim 1 with an additional limitation of j. said paddles angled outward from said float.
Claim 11
Dependent Claim
28 words
The invention as defined in claim 1 wherein j. said stub axles are coaxial and k. said floats are i. cylindrical and ii. concentric with the stub axles.
Claim 12
Dependent Claim
22 words
The invention as defined in claim 10 wherein m. each crank has an equal and opposite throw from the stub axles axis.
Claim 13
Dependent Claim
72 words
The invention as defined in claim 11 with additional limitations of n. the aft floats having three paddles placed thereon, o. one of said paddles being a drag paddle which is aligned with the crank nearest thereto p. so that when the port treadle board is down the port aft float will have said drag paddle projecting directly down and the starboard aft float will have said drag paddle pointing directly up.
Claim 14
Dependent Claim
25 words
The invention as defined in claim 12 with an additional limitation of q. the other two paddles are at right angles to the drag paddle.
Claim 15
Dependent Claim
26 words
The invention as defined in claim 13 with an additional limitation of r. the paddles on the forward floats the same as on the aft floats.
Claim 16
Dependent Claim
62 words
The invention as defined in claim 14 with additional limitations of s. a patch on the bottom of each treadle board near each end thereof, t. a tube under each end of the treadle board against said patch, u. resilient means on each treadle board for biasing the tube against the patch, and v. one of said cranks journaled in each tube.
Claim 17
Dependent Claim
26 words
The invention as defined in claim 15 with an additional limitation of w. dirigible means connected to each tube for moving said tube from said stop.
Claim 18
Dependent Claim
33 words
The invention as defined in claim 16 wherein x. said dirigible means is a halyard y. stopped above the board and reeved through the board around the tube and back above the board.
Claim 19
Dependent Claim
63 words
The invention as defined in claim 17 wherein z. said resilient means is a doubled rubber strap with both ends hooked to the tube and the doubled strap reeved upward around the end of the treadle board and back under the tube and back through the treadle board where the bight of the strap is belayed to dowel stock above the treadle board.
Claim 20
Dependent Claim
20 words
The invention as defined in claim 18 with an additional limitation of aa. said paddle angled outward from said float.
Claim 21
Dependent Claim
60 words
The invention as defined in claim 19 with additional limitations of bb. each treadle board extending aft of the rear crankshaft, cc. a guide fin set on the bottom of each treadle board aft of the rear crankshaft angling outboard dd. so that when the treadle board is depressed and stationary, the guiding fin tends to turn the water vehicle.
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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) | 1980-04-11 | 1980-10-11 | 1981-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-11 | 1984-10-11 | 1985-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-11 | 1988-10-11 | 1989-04-12 | $7700.00 | Window Closed / Lapsed |