US4482268A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Boat lift
Assignee: LEVITATOR Inc A NV CORP
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Filing: 1983-10-13
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Granted: 1984-11-13
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Expires: 2003-10-13
Abstract
Abstract A boat lift supported on a single stanchion that includes a sleeve assembly mounted for slidable movement on the stanchion. A cross arm mounted on the sleeve assembly carries fork members which protrude out from the cross member. Blocks on the forks cradle the hull of a boat for lifting. Standards mounted on the cross member carry bumper floats and docking eyes.
Inventors
- 👤 Ernest W. Stevenson
- 👤 Randall E. Nahas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:55
CPC Classifications
B; B63; B63C; B63C3/00; B63C3/06
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
132 words
A boat lift comprising: (a) a single stanchion load bearing member; (b) a base plate connected to the top of said stanchion; (c) a bracket member connected to said base plate laterally disposed from said stanchion members and adapted for connection to a stablizing member; (d) a sleeve assembly slidably mounted on said stanchion member for travel thereon; (e) a cross arm connected to said sleeve assembly and extending laterally substantially equidistant on either side of said stanchion; (f) forward and aft fork members connected to said cross arm and disposed on opposite sides of said stanchion member; (g) block means mounted on said forks adapted for cradling the hull of a boat; (h) a lifting member connected to said sleeve assembly; and (i) mechanical multiplying means connected to said lifting member.
Claim 2
Dependent Claim
132 words
A boat lift comprising: (a) a single stanchion load bearing member; (b) a base plate connected to the top of said stanchion; (c) a bracket member connected to said base plate laterally disposed from said stanchion members and adapted for connection to a stablizing member; (d) a sleeve assembly slidably mounted on said stanchion member for travel thereon; (e) a cross arm connected to said sleeve assembly and extending laterally substantially equidistant on either side of said stanchion; (f) forward and aft fork members connected to said cross arm and disposed on opposite sides of said stanchion member; (g) block means mounted on said forks adapted for cradling the hull of a boat; (h) a lifting member connected to said sleeve assembly; and (i) mechanical multiplying means connected to said lifting member.
Claim 3
Dependent Claim
59 words
A boat lift as described in claim 1 comprising: (a) a pair of docking standards connected to said cross arm on opposite sides of said stanchion member; (b) docking eyes mounted at the upper end of each of said docking standards; and (c) buoyant fender means slidably mounted on each of said docking standards for vertical free sliding movement.
Claim 4
Dependent Claim
79 words
A boat lift as described in claim 1 comprising; (a) said block means includes a fore block assembly connected to said fore fork member and an aft block assembly connected to said aft fork member; (b) said fore block assembly includes right and left swivel mounts connected to said fore fork member; (c) said aft block assembly includes right and left swivel mounts connected to said aft fork member; and (d) power means connected to said mechanical multiplying means.
Claim 5
Dependent Claim
22 words
A boat lift as described in claim 1 wherein: (a) said fork members include slide means slidably mounted on said cross arm.
Claim 6
Dependent Claim
22 words
A boat lift as described in claim 2 wherein: (a) said docking standards include slide means slidably mounted on said cross arm.
Claim 7
Dependent Claim
27 words
A boat lift as described in claim 1 wherein: (a) said sleeve assembly includes upper and lower roller assemblies mounted for rolling contact on said stanchion member.
Claim 8
Dependent Claim
36 words
A boat lift as described in claim 1 comprising: (a) a latch means mounted on said base plate; (b) an eye member mounted on said sleeve member and positioned for releasable registration with said latch means.
Claim 9
Dependent Claim
27 words
A boat lift as described in claim 1 comprising: (a) said lifting means is a linked chain; and (b) said mechanical multiplying means is a chain fall.
Claim 10
Dependent Claim
59 words
A boat lift as described in claim 8 comprising: (a) a yoke member connected to said base plate; (b) said chain fall is pivotally connected to said yoke member; (c) said chain fall includes a chain drive power wheel; (d) an adapter member connected to said power wheel; and (e) an electric motor operatively connected to said adapter member.
Claim 11
Dependent Claim
31 words
A boat lift as described in claim 1 comprising: (a) said sleeve assembly includes a cross bar sleeve; and (b) said cross arm is slidably mounted within said cross bar sleeve.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-11-13 | 1988-05-14 | 1988-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-11-13 | 1992-05-14 | 1992-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-11-13 | 1996-05-14 | 1996-11-13 | $7700.00 | Window Closed / Lapsed |