Patent US5853281A successfully refreshed from Google Patents.
US5853281A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Loading ramp for recreational vehicles
Assignee: Individual
•
Filing: 1996-12-16
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Granted: 1998-12-29
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Expires: 2016-12-16
Abstract
Abstract A ramp is used for loading and unloading recreational vehicles, especially snowmobiles, trucks, trailers and the like. The preferred ramp is a three section ramp with two outer sections and a center section connected to fold from side to side for storage and transport purposes. Each outer ramp section is equipped with a series of rollers spaced along the ramp section to allow the skis of a snowmobile to advance along the ramp without binding. The rollers are preferably made with a rigid core and a rotating outer sleeve of PVC. The tubing is slit helically from end to end so that it can be removed and installed without dismantling the ramp. The center section of the ramp is equipped with lateral cleats.
Inventors
- 👤 Mervin Blair Farmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:37
CPC Classifications
B; B65; B65G; B65G69/00; B65G69/28; B65G69/30; B65G39/00; B65G39/02; B65G39/07
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
170 words
A ramp for loading and unloading snowmobiles comprising: two longitudinally extending, laterally spaced apart ski supporting sections, each comprising; two spaced apart rails; a plurality of support members comprising a cylindrical member extending laterally between the rails and spaced longitudinally apart therealong, each said cylindrical member being non-rotatably fixed to the rails; and a plurality of removable and reengaaeable roller elements one being arranged around each one of said plurality of support members for rolling engagement with a snowmobile ski; each said roller element comprising a removable and reengageable cylindrical sheath arranged to surround the fixed cylindrical member in direct contact with the cylindrical member for sliding rotation about the cylindrical member such that the cylindrical member remains fixed and the sheath rotates relative thereto, said cylindrical sheath having a helical slit extending longitudinally therealong allowing ready removal and reengagement of the sheath on the support member; and a track supporting section between the ski supporting sections, the track supporting section comprising means for tractional engagement with a snowmobile track.
Claim 2
Dependent Claim
170 words
A ramp for loading and unloading snowmobiles comprising: two longitudinally extending, laterally spaced apart ski supporting sections, each comprising; two spaced apart rails; a plurality of support members comprising a cylindrical member extending laterally between the rails and spaced longitudinally apart therealong, each said cylindrical member being non-rotatably fixed to the rails; and a plurality of removable and reengaaeable roller elements one being arranged around each one of said plurality of support members for rolling engagement with a snowmobile ski; each said roller element comprising a removable and reengageable cylindrical sheath arranged to surround the fixed cylindrical member in direct contact with the cylindrical member for sliding rotation about the cylindrical member such that the cylindrical member remains fixed and the sheath rotates relative thereto, said cylindrical sheath having a helical slit extending longitudinally therealong allowing ready removal and reengagement of the sheath on the support member; and a track supporting section between the ski supporting sections, the track supporting section comprising means for tractional engagement with a snowmobile track.
Claim 3
Dependent Claim
15 words
A ramp according to claim 1 wherein the sheath comprises a sleeve of plastic material.
Claim 4
Dependent Claim
32 words
A ramp according to claim 1 wherein the ramp has a top end and ramp support means at the top end for supporting the ramp from the tailgate of a pickup truck.
Claim 5
Dependent Claim
37 words
A ramp according to claim 3 wherein the ramp support means comprise a flat plate extending laterally across the top of each ski support section and inclined at an angle to the longitudinal extent of the ramp.
Claim 6
Dependent Claim
42 words
A ramp according to claim 4 wherein the ramp support means further comprise two flexible tension elements, clamps for clamping the tension elements at select positions therealong to the ramp and anchor means at a distal end of each flexible tension element.
Claim 7
Dependent Claim
21 words
A ramp according to claim 1 wherein the means for tractional engagement comprise a plurality of laterally extending, longitudinally spaced cleats.
Claim 8
Dependent Claim
67 words
A ramp according to claim 1 including hinge means connecting the ski support and ramp sections to opposite sides of the track supporting section for pivotal movement about respective longitudinal axes between an extended condition with the ski supporting sections on opposite lateral sides of the track supporting section, and a folded condition with the sections stacked with the track supporting section between the ski supporting section.
References Cited (Backward Citations)
US3690481A
Cited
US3687314A
Cited
US3818528A
Cited
US4478549A
Cited
US4926995A
Cited
US5538308A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-12-28 | 2002-06-29 | 2002-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-12-28 | 2006-06-29 | 2006-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-12-28 | 2010-06-29 | 2010-12-29 | $7700.00 | Window Closed / Lapsed |