US4046393A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable sled
Assignee: Individual
•
Filing: 1976-03-04
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Granted: 1977-09-06
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Expires: 1996-03-04
Abstract
Abstract A portable plastic sled for the rescue of injured persons and disabled snowmobiles. The sled is constructed of heavy gauge low density polyethylene having a molecular memory and formed to lay substantially flat when unrolled with the exception of the front portion which retains a partial curvature. A transverse bar at the front of the sled includes a socket for attachment of a separate crank to enable the sled to be conveniently rolled into a tight bundle for stowage aboard a snowmobile or all terrain vehicle. The crank is formed with attachments to permit use as a handle for manual towing or as a towbar for snowmobile towing. The crank also becomes a convenient carrying handle when the sled is rolled up. An integral tail on the sled retains the sled in the rolled up condition and multipurpose clasp lines retain the crankhandle to the rolled up sled.
Inventors
- 👤 Kenneth Vadnais
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:57
CPC Classifications
B; B62; B62B; B62B15/00; B62B15/007
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
101 words
A portable sled comprising, an oblong flexible plastic sheet having a front end and a back end, a bar extending transversely along at least a portion of the front end of the sheet and fastened thereto, the bar including engagement means at one end thereof, a separate crankhandle, engagement means on the crankhandle adapted to engage the engagement means on the bar thereby permitting rotation of the crankhandle to tightly roll up the sled, and, separate attachment means on the sled and separate attachment means on the crankhandle to permit at least one alternative attachment of the crankhandle with the sled.
Claim 2
Dependent Claim
101 words
A portable sled comprising, an oblong flexible plastic sheet having a front end and a back end, a bar extending transversely along at least a portion of the front end of the sheet and fastened thereto, the bar including engagement means at one end thereof, a separate crankhandle, engagement means on the crankhandle adapted to engage the engagement means on the bar thereby permitting rotation of the crankhandle to tightly roll up the sled, and, separate attachment means on the sled and separate attachment means on the crankhandle to permit at least one alternative attachment of the crankhandle with the sled.
Claim 3
Dependent Claim
19 words
The portable sled of claim 1 including retention means adapted to retain the sled in the rolled up condition.
Claim 4
Dependent Claim
32 words
The portable sled of claim 2 wherein the retention means comprise a tail attached to the back of the sled and adapted to fasten about the sled in the rolled up condition.
Claim 5
Dependent Claim
17 words
The portable sled of claim 3 wherein the tail extends integrally from the back of the sled.
Claim 6
Dependent Claim
18 words
The portable sled of claim 1 wherein the bar is integrally molded into the front of the sled.
Claim 7
Dependent Claim
20 words
The portable sled of claim 1 wherein the plastic sheet is molded to remain substantially flat in the unrolled condition.
Claim 8
Dependent Claim
28 words
The portable sled of claim 1 wherein the attachment means on the sled include means to attach both ends of the crankhandle to the front of the sled.
Claim 9
Dependent Claim
36 words
The portable sled of claim 7 wherein the means to attach the crankhandle to the front of the sled include strap loops loosely fitting about the bar and adapted to engage the ends of the crankhandle.
Claim 10
Dependent Claim
29 words
The portable sled of claim 7 including a grip rotatably mounted on the central portion of the crankhandle and means on the grip adapted to engage a towing vehicle.
Claim 11
Dependent Claim
38 words
The portable sled of claim 1 wherein the attachment means include at least one line adapted to attach the crankhandle to the sled and means on the sled and on the crankhandle for attaching the line to each.
Claim 12
Dependent Claim
40 words
The portable sled of claim 10 wherein each line includes a clasp and the crankhandle attachment means include at least one ring adjacent the central portion of the crankhandle and at least one ring at one end of the crankhandle.
Claim 13
Dependent Claim
31 words
The portable sled of claim 10 wherein the attachment means on the sled include at least one slot adjacent the bar to permit the line to be looped therethrough and fastened.
Claim 14
Dependent Claim
56 words
The portable sled of claim 11 wherein the sled includes fastening means at the back for the line and the line is sized to wrap about the sled in the rolled up condition with the clasp tightly engaging a ring at the end of the crankhandle to retain the crankhandle against the back of the sled.
Claim 15
Dependent Claim
44 words
A portable sled comprising, an oblong flexible sheet, a separate crankhandle, at least two separate attachment means on the crankhandle and at least two separate attachment means on the sled to permit at least two optionally selectable attachments of the crankhandle to the sled.
Claim 16
Dependent Claim
44 words
A portable sled comprising, an oblong flexible sheet, a separate crankhandle, at least two separate attachment means on the crankhandle and at least two separate attachment means on the sled to permit at least two optionally selectable attachments of the crankhandle to the sled.
Claim 17
Dependent Claim
35 words
The portable sled of claim 14 including engagement means at one end of the sled and co-operative engagement means on the crankhandle adapted to permit roll up of the sled by rotation of the crankhandle.
Claim 18
Dependent Claim
45 words
The portable sled of claim 14 wherein the central portion of the crankhandle is displaced from the cranking axis of the crankhandle, and a grip is rotatably mounted on the central portion of the crankhandle, the grip including means adapted to engage a towing vehicle.
Claim 19
Dependent Claim
35 words
The portable sled of claim 14 wherein the sheet material is a plastic having a molecular memory and formed to remain substantially flat in the unrolled condition with a slight upward curvature at one end.
Claim 20
Dependent Claim
19 words
The portable sled of claim 17 including retention means adapted to retain the sled in the rolled up condition.
Claim 21
Dependent Claim
51 words
The portable sled of claim 14 including a bar extending transversely along at least a portion of one end of the sled, the bar including engagement means at one end thereof, and co-operative engagement means on the crankhandle adapted to permit roll up of the sled by rotation of the crankhandle.
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) | 1980-09-05 | 1981-03-07 | 1981-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-05 | 1985-03-07 | 1985-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-05 | 1989-03-07 | 1989-09-06 | $7700.00 | Window Closed / Lapsed |