Patent US4781397A successfully refreshed from Google Patents.
US4781397A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Collapsible trolley
Assignee: CORNUCOPIA PRODUCTS AND DESIGN Ltd
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Filing: 1987-07-30
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Granted: 1988-11-01
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Expires: 2007-07-30
Abstract
Abstract A collapsible trolley adapted for transporting and launching dinghies and like-sized boats comprises a rear axle having endwise disposed wheels and a Y-frame comprising a forward spine and trailing frame members pivotted thereto and deployable between a stowing position alongside the spine and an operational position in which the ends of the frame members remote from their spine pivot ends are releasably attachable to the axle near the ends thereof.
Inventors
- 👤 Michael Burn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:11
CPC Classifications
B; B62; B62B; B62B1/00; B62B1/18; B62B1/20; B62B1/208; B62B1/26; B63; B63C; B63C3/00; B63C3/12; B62B2202/00; B62B2202/40; B62B2202/403; B62B2205/00; B62B2205/04
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
107 words
A collapsible trolley adapted for transporting and launching dinghies and like-sized boats, comprising (a) a rear axle having endwise disposed wheels (b) a Y-frame comprising a forward spine and trailing frame members pivotted thereto (c) said frame members being deployed by pivotting between a stowing position alongside and parallel to the spine and an operational Y shaped configuration in which the ends of the frame members remote from their spine pivot ends are releasably attachable to the axle near the ends thereof (d) attachment of said remote ends of said frame members to the axle constituting the sole means of attachment of said Y-frame to said axle.
Claim 2
Dependent Claim
107 words
A collapsible trolley adapted for transporting and launching dinghies and like-sized boats, comprising (a) a rear axle having endwise disposed wheels (b) a Y-frame comprising a forward spine and trailing frame members pivotted thereto (c) said frame members being deployed by pivotting between a stowing position alongside and parallel to the spine and an operational Y shaped configuration in which the ends of the frame members remote from their spine pivot ends are releasably attachable to the axle near the ends thereof (d) attachment of said remote ends of said frame members to the axle constituting the sole means of attachment of said Y-frame to said axle.
Claim 3
Dependent Claim
38 words
A trolley according to claim 1, of which the forward spine and the two said frame members are commensurate so as to fold into the shortest length when arranged with the said frame members in the stowing position.
Claim 4
Dependent Claim
27 words
A trolley according to claim 1, in which the axle is of substantially the same length as the longer of the frame members or and forward spine.
Claim 5
Dependent Claim
16 words
A trolley according to claim 1, in which the wheels are releasably attached to the axle.
Claim 6
Dependent Claim
18 words
A trolley according to claim 4, in which the wheels are retained on the axle by removable clips.
Claim 7
Dependent Claim
19 words
A trolley according to claim 1, in which the trailing arms are retained on the axle by removable clips.
Claim 8
Dependent Claim
24 words
A trolley according to claim 1, in which the frame members are pivotted to the spine in a shaped member providing a keel support.
Claim 9
Dependent Claim
18 words
A trolley according to claim 1, in which the axle carries a central chock for supporting a keel.
Claim 10
Dependent Claim
15 words
A trolley according to claim 1, comprising a forward handle releasably connected to the spine.
Claim 11
Dependent Claim
17 words
A trolley according to claim 9, comprising a forward fitment on the spine for attaching the handle.
Claim 12
Dependent Claim
26 words
A trolley according to claim 1, comprising front support means releasably attachable to the spine at its forward end comprising a pair of laterally extending arms.
Claim 13
Dependent Claim
25 words
A trolley according to claim 1, comprising rear lateral support means comprising arms upstanding from the ends of the axle and extending over the wheels.
Claim 14
Dependent Claim
28 words
A trolley according to claim 1, comprising canvas support platform means releasably attachable to the frame members to extend tautly between them when deployed in their operational position.
Claim 15
Dependent Claim
18 words
A trolley according to claim 1, comprising container means for the various parts of the trolley when dismantled.
Claim 16
Dependent Claim
12 words
A trolley according to claim 14, said container means comprising a bag.
Claim 17
Dependent Claim
107 words
A collapsible trolley adapted for transporting and launching dinghies and like-sized boats comprising a rear axle having endwise disposed wheels and a Y-frame comprising a forward spine and trailing frame members pivotted thereto and deployed between a stowing position alongside and parallel to the spine and an operational Y shaped configuration in which the ends of the frame members remote from their spine pivot ends are releasably attachable to the axle near the ends thereof, and further comprising rear lateral support means comprising arms upstanding from the ends of the axle and extending over the wheels and said rear support means comprising hooks for a securing strap.
Claim 18
Dependent Claim
107 words
A collapsible trolley adapted for transporting and launching dinghies and like-sized boats comprising a rear axle having endwise disposed wheels and a Y-frame comprising a forward spine and trailing frame members pivotted thereto and deployed between a stowing position alongside and parallel to the spine and an operational Y shaped configuration in which the ends of the frame members remote from their spine pivot ends are releasably attachable to the axle near the ends thereof, and further comprising rear lateral support means comprising arms upstanding from the ends of the axle and extending over the wheels and said rear support means comprising hooks for a securing strap.
Claim 19
Dependent Claim
113 words
A collapsible trolley adapted for transporting and launching dinghies and like-sized boats comprising a rear axle having endwise disposed wheels and a Y-frame comprising a forward spine and trailing frame members pivotted thereto and deployed between a stowing position alongside and parallel to the spine and an operational Y shaped configuration in which the ends of the frame members remote from their spine pivot ends are releasably attachable to the axle near the ends thereof, comprising canvas support platform means releasably attachable to the frame members to extend tautly between them when deployed in their operational position, said canvas support means comprising pop fasteners mating with components secured to the said frame members.
Claim 20
Dependent Claim
113 words
A collapsible trolley adapted for transporting and launching dinghies and like-sized boats comprising a rear axle having endwise disposed wheels and a Y-frame comprising a forward spine and trailing frame members pivotted thereto and deployed between a stowing position alongside and parallel to the spine and an operational Y shaped configuration in which the ends of the frame members remote from their spine pivot ends are releasably attachable to the axle near the ends thereof, comprising canvas support platform means releasably attachable to the frame members to extend tautly between them when deployed in their operational position, said canvas support means comprising pop fasteners mating with components secured to the said frame members.
References Cited (Backward Citations)
US2608418A
Cited
US2933328A
Cited
FR1488011A
Cited
US3377095A
Cited
US3831958A
Cited
US4037858A
Cited
FR2337640A1
Cited
FR2546466A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-11-01 | 1992-05-02 | 1992-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-01 | 1996-05-02 | 1996-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-01 | 2000-05-02 | 2000-11-01 | $7700.00 | Window Closed / Lapsed |