Patent US3884490A successfully refreshed from Google Patents.
US3884490A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Folding sled
Assignee: Flambeau Products Corp
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Filing: 1974-04-03
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Granted: 1975-05-20
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Expires: 1994-04-03
Abstract
Abstract A unitary, plastic, folding or collapsible sled. The sled includes a first and second sled section integrally connected by a flexible plastic web acting as a hinge.
Inventors
- 👤 Werner Hellman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:00
CPC Classifications
B; B62; B62B; B62B13/00; B62B13/16; B62B2205/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
227 words
A unitary, single body collapsible sled, comprising, in combination: a first sled member having a forwardly and upwardly turned nose portion and a first body-supporting portion, said first bodysupporting portion including a first upper wall member and a first lower surface-engaging wall member, said first upper and lower wall members being specially separated by a first hollow region of said first sled member; a second sled member having an end portion and a second bodysupporting portion, said second body-supporting portion including a second upper wall member and a second lower surface-engaging wall member, said second upper and lower wall members being spacially separated by a second hollow region of said second sled member; a plastic hinge integrally and hingedly connecting said first and second sled members opposite said nose and end portions, respectively, whereby said collapsible sled is operable in an open and folded state, said first and second body-supporting portions being substantially planar in said open state; and means for locking said first sled member to said second sled member in said folded state; said first and second upper wall members, said first and second lower surface-engaging wall members and said first and second hollow regions cooperatively defining cushion means for absorbing shock upon said first and second lower surfaceengaging wall members to substantially avoid transmission of said shock to a user of said collapsible sled.
Claim 2
Dependent Claim
227 words
A unitary, single body collapsible sled, comprising, in combination: a first sled member having a forwardly and upwardly turned nose portion and a first body-supporting portion, said first bodysupporting portion including a first upper wall member and a first lower surface-engaging wall member, said first upper and lower wall members being specially separated by a first hollow region of said first sled member; a second sled member having an end portion and a second bodysupporting portion, said second body-supporting portion including a second upper wall member and a second lower surface-engaging wall member, said second upper and lower wall members being spacially separated by a second hollow region of said second sled member; a plastic hinge integrally and hingedly connecting said first and second sled members opposite said nose and end portions, respectively, whereby said collapsible sled is operable in an open and folded state, said first and second body-supporting portions being substantially planar in said open state; and means for locking said first sled member to said second sled member in said folded state; said first and second upper wall members, said first and second lower surface-engaging wall members and said first and second hollow regions cooperatively defining cushion means for absorbing shock upon said first and second lower surfaceengaging wall members to substantially avoid transmission of said shock to a user of said collapsible sled.
Claim 3
Dependent Claim
30 words
A unitary, single body collapsible sled as claimed in claim 1 wherein said first and second upper wall members and said plastic hinge are substantially planar in said open state.
Claim 4
Dependent Claim
21 words
A unitary, single body collapsible sled as claimed in claim 1 wherein the said plastic hinge includes a thin plastic web.
Claim 5
Dependent Claim
21 words
A unitary, single body collapsible sled as claimed in claim 3 wherein said plastic web is polyethylene, polypropylene, polyurethane or polycarbonate.
Claim 6
Dependent Claim
48 words
A unitary, single body collapsible sled as claimed in claim 1 wherein said first and second sled members include a locking tab and a locking slot, said locking tab and slot cooperatively defining said locking means, said locking tab lockingly engaging said locking slot in said folded state.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-19 | 1978-11-18 | 1979-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-19 | 1982-11-18 | 1983-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-19 | 1986-11-18 | 1987-05-20 | $7700.00 | Window Closed / Lapsed |