Patent US4551685A successfully refreshed from Google Patents.
Patent US3877409A successfully refreshed from Google Patents.
US3877409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water skis
Assignee: Individual
•
Filing: 1973-07-13
•
Granted: 1975-04-15
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Expires: 1993-07-13
Abstract
Abstract A pair of side-by-side user-propelled buoyant water skis having rear paddle wheels and a mechanism interconnecting the skis and drivingly coupled to the paddle wheels so as to rotate the paddle wheels responsive to relative longitudinal movements of the skis, whereby a user can propel the skis through the water by walking movements. The skis have respective pivoted rudders and the rudders are operated by control rods grasped by the user. The skis are held in substantially coplanar relationship by a rod extending slidably through vertically swivelled guide sleeves on the respective skis and are held in parallel relationship by sliding connections between the skis.
Inventors
- 👤 Helge Krogseng
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:31
CPC Classifications
B; B63; B63H; B63H5/00; B63H5/02; B63B; B63B34/00; B63B34/50; B63B34/56; B63H16/00; B63H16/08
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
161 words
A water ski assembly comprising: a. a pair of elongated buoyant members; b. foot receptacle means on each of said buoyant members for receiving the feet of an operator of the assembly; c. means slidably interconnecting said members for relative longitudinal movement and constraining said members to substantial parallelism; d. a transverse shaft journalled on the rear portion of each of said buoyant members; e. a plural-vaned impeller rigidly mounted on each of said shafts; and f. means for driving said impellers in response to normal walking movements by said operator, comprising: i. a pair of longitudinally spaced support pulleys rotatably mounted on each of said buoyant members; ii. an endless cable engaged on each of said pair of support pulleys; iii. means connecting each buoyant member to the endless cable on the other buoyant member, whereby the cables move responsive to relative longitudinal movement of the buoyant members; and iv. means drivingly coupling each endless cable to its respective shaft.
Claim 2
Dependent Claim
161 words
A water ski assembly comprising: a. a pair of elongated buoyant members; b. foot receptacle means on each of said buoyant members for receiving the feet of an operator of the assembly; c. means slidably interconnecting said members for relative longitudinal movement and constraining said members to substantial parallelism; d. a transverse shaft journalled on the rear portion of each of said buoyant members; e. a plural-vaned impeller rigidly mounted on each of said shafts; and f. means for driving said impellers in response to normal walking movements by said operator, comprising: i. a pair of longitudinally spaced support pulleys rotatably mounted on each of said buoyant members; ii. an endless cable engaged on each of said pair of support pulleys; iii. means connecting each buoyant member to the endless cable on the other buoyant member, whereby the cables move responsive to relative longitudinal movement of the buoyant members; and iv. means drivingly coupling each endless cable to its respective shaft.
Claim 3
Dependent Claim
89 words
The water ski assembly of claim 1, and wherein said coupling means comprises a pair of cable reels rotatably mounted on each shaft, connecting cables secured to opposite sides of the endless cable of the associated buoyant member and wound on the respective cable reels, differential gear means interconnecting the pairs of cable reels, and oppositelyacting drive ratchet means between the cable reels and the associated shafts, whereby to wind up one connecting cable on its reel while the other unwinds from its reel as the associated shaft rotates.
Claim 4
Dependent Claim
41 words
The water ski assembly of claim 2, and wherein said differential gear means comprises opposing crown gears on the cable reels, pinion gear means between and meshing with the opposing crown gears, and fixed means rotatably supporting said pinion gear means.
Claim 5
Dependent Claim
42 words
The water ski assembly of claim 3, and wherein each shaft is provided with a pair of plural-vaned impellers located on opposite sides of the associated differential gear means, the vanes of the pairs of impellers being staggered relative to each other.
Claim 6
Dependent Claim
134 words
A water ski assembly comprising: a. a pair of elongated buoyant members; b. foot receptacle means on each of said buoyant members for receiving the feet of an operator of the assembly; c. means slidably interconnecting said members for relative longitudinal movement and constraining said members to substantial parallelism; d. impeller means on each of said buoyant members; e. means on each of said buoyant members linked to said impeller means on the other of said buoyant members for driving said impeller means in response to normal walking movements by said operator; and f. means constraining the buoyant members to movement in the same plane g. said constraining means further comprises respective horizontal guide sleeves swivelly mounted on the buoyant member for horizontal rotation, and a rod member slidably engaged through said guide sleeves.
Claim 7
Dependent Claim
134 words
A water ski assembly comprising: a. a pair of elongated buoyant members; b. foot receptacle means on each of said buoyant members for receiving the feet of an operator of the assembly; c. means slidably interconnecting said members for relative longitudinal movement and constraining said members to substantial parallelism; d. impeller means on each of said buoyant members; e. means on each of said buoyant members linked to said impeller means on the other of said buoyant members for driving said impeller means in response to normal walking movements by said operator; and f. means constraining the buoyant members to movement in the same plane g. said constraining means further comprises respective horizontal guide sleeves swivelly mounted on the buoyant member for horizontal rotation, and a rod member slidably engaged through said guide sleeves.
Claim 8
Dependent Claim
27 words
The water ski assembly of claim 5, and wherein said impeller means comprises respective transversely journalled plural-vaned impellers mounted on the rear portions of the buoyant members.
Claim 9
Dependent Claim
59 words
The water ski assembly of claim 5, and respective rudders vertically pivoted to the rear end portions of the buoyant members, rudder pulleys journalled on the forward end portions of the buoyant members, control cables operatively connected to the rudders and engaged around the rudder pulleys, and respective upwardly and rearwardly extending control rods secured to the rudder pulleys.
Claim 10
Dependent Claim
101 words
A water ski assembly comprising: a. a first buoyant member and a second buoyant member; b. a plural vaned impeller secured to a shaft mounted at the rear portion of said second buoyant member for driving the same; c. support pulley means rotatably mounted on said second buoyant member and an endless cable engaged on said support pulley means for rotating said impeller; and d. means connecting said first buoyant member to said endless cable, whereby said cable causes said impeller to rotate in response to relative longitudinal movement of said first buoyant member with respect to said second buoyant member.
Claim 11
Dependent Claim
101 words
A water ski assembly comprising: a. a first buoyant member and a second buoyant member; b. a plural vaned impeller secured to a shaft mounted at the rear portion of said second buoyant member for driving the same; c. support pulley means rotatably mounted on said second buoyant member and an endless cable engaged on said support pulley means for rotating said impeller; and d. means connecting said first buoyant member to said endless cable, whereby said cable causes said impeller to rotate in response to relative longitudinal movement of said first buoyant member with respect to said second buoyant member.
Claim 12
Dependent Claim
47 words
The water ski assembly set forth in claim 8 further including driving means on said first buoyant member aNd means coupling said second buoyant member to said first buoyant member driving means, so that a predetermined movement of said second buoyant member drives said first buoyant member.
Claim 13
Dependent Claim
20 words
The water ski assembly of claim 8, and means slidably interconnecting said members and constraining said members to substantial parallelism.
Claim 14
Dependent Claim
18 words
The water ski assembly of claim 8, and means constraining the buoyant members to a substantially coplanar relationship.
Claim 15
Dependent Claim
135 words
A water ski assembly comprising: a. a first buoyant member and a second buoyant member; b. means on said second buoyant member for driving the same, including an endless cable; c. means coupling said endless cable to said driving means including: i. a pair of cable reels rotatably mounted on said second buoyant member; ii. connecting cables secured to opposite sides of said endless cable and wound on respective cable reels; iii. differential gear means interconnecting said pair of cable reels; and iv. oppositely acting drive ratchet means to wind up one connecting cable on its reel while the other unwinds from its reel; and d. means connecting said first buoyant member to said endless cable, so that a predetermined movement of said first buoyant member activates said driving means on said second buoyant member.
Claim 16
Dependent Claim
135 words
A water ski assembly comprising: a. a first buoyant member and a second buoyant member; b. means on said second buoyant member for driving the same, including an endless cable; c. means coupling said endless cable to said driving means including: i. a pair of cable reels rotatably mounted on said second buoyant member; ii. connecting cables secured to opposite sides of said endless cable and wound on respective cable reels; iii. differential gear means interconnecting said pair of cable reels; and iv. oppositely acting drive ratchet means to wind up one connecting cable on its reel while the other unwinds from its reel; and d. means connecting said first buoyant member to said endless cable, so that a predetermined movement of said first buoyant member activates said driving means on said second buoyant member.
Claim 17
Dependent Claim
44 words
The water ski assembly of claim 12, and wherein said second buoyant member is provided with a pair of pluralvaned impellers located on opposite sides of the associated differential gear means, the vanes of the pairs of impellers being staggered relative to each other.
References Cited (Backward Citations)
US693615A
Cited
US1248013A
Cited
US2158349A
Cited
US2153939A
Cited
US3031692A
Cited
US3084356A
Cited
US3264663A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |