US3931957A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lifting apparatus
Assignee: Individual
•
Filing: 1975-04-25
•
Granted: 1976-01-13
•
Expires: 1995-04-25
Abstract
Abstract Lifting apparatus for mounting on a support structure comprising first and second elongated guide assemblies each having an anchor end pivotally anchorable to said support structure for vertical pivotal movement and a movable end disposed to extend outwardly beyond the end of said support structure. The first guide assembly is disposed above the second guide assembly and has its anchor end disposed for anchoring to said support structure at a location spaced substantially inwardly from the end of said support structure, while the second guide assembly has its anchor end disposed for anchoring closer to the end of said support structure. A rigid base assembly is vertically pivotally connected to the movable ends of said guide assemblies to form a liftable assembly. Bulkhead means including object engagement means are mounted on said base assembly. Elevating means, mountable on said support structure, are provided for raising said liftable assembly.
Inventors
- 👤 John D. Thibodeaux
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:36
CPC Classifications
B; B60; B60P; B60P1/00; B60P1/48
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
209 words
Lifting apparatus for mounting on a supporting structure having an end, said lifting apparatus comprising: a first guide assembly having an anchor end pivotally anchorable to said support structure at a location spaced substnatially inwardly from the end of said support structure for vertical pivotal movement and a movable end disposed to extend outwardly beyond the end of said support structure; a second guide assembly disposed below said first guide assembly and having an anchor end pivotally anchorable to said support structure at a location closer to the end of said support structure than the location of the anchor end of said first guide assembly for vertical pivotal movement and a movable end disposed to extend outwardly beyond the end of said support structure; a rigid base assembly pivotally connected to the movable ends of said guide assemblies at vertically spaced points for relative vertical pivotal movement between said base assembly and each of said guide assemblies whereby said base assembly and said guide assemblies comprise a liftable assembly; bulkhead means mounted on said base assembly and including engagement means for engaging an object; and elevating means mountable on said support structure and connected to said liftable assembly for raising said liftable assembly with respect to said support structure.
Claim 2
Dependent Claim
209 words
Lifting apparatus for mounting on a supporting structure having an end, said lifting apparatus comprising: a first guide assembly having an anchor end pivotally anchorable to said support structure at a location spaced substnatially inwardly from the end of said support structure for vertical pivotal movement and a movable end disposed to extend outwardly beyond the end of said support structure; a second guide assembly disposed below said first guide assembly and having an anchor end pivotally anchorable to said support structure at a location closer to the end of said support structure than the location of the anchor end of said first guide assembly for vertical pivotal movement and a movable end disposed to extend outwardly beyond the end of said support structure; a rigid base assembly pivotally connected to the movable ends of said guide assemblies at vertically spaced points for relative vertical pivotal movement between said base assembly and each of said guide assemblies whereby said base assembly and said guide assemblies comprise a liftable assembly; bulkhead means mounted on said base assembly and including engagement means for engaging an object; and elevating means mountable on said support structure and connected to said liftable assembly for raising said liftable assembly with respect to said support structure.
Claim 3
Dependent Claim
39 words
The lifting apparatus of claim 1 wherein said second guide assembly is shorter than said first guide assembly and the anchor end of said second guide assembly is disposed for anchoring closely adjacent the end of said support structure.
Claim 4
Dependent Claim
79 words
The lifting apparatus of claim 1 wherein said elevating means comprises a mast assembly rigidly mountable on said support structure to extend vertically upwardly therefrom and having an upper end, an elongate flexible member movably connected to said mast assembly adjacent said upper end, said flexible member having an end portion connected to said liftable assembly, and drive means connected to said flexible member and operative to pull said end portion of said flexible member toward said mast assembly.
Claim 5
Dependent Claim
25 words
The lifting apparatus of claim 3 wherein the end portion of said flexible member is connected to said second guide assembly adjacent said base assembly.
Claim 6
Dependent Claim
31 words
The lifting apparatus of claim 4 wherein said first guide assembly includes means for movably receiving a portion of said flexible member between said mast assembly and said second guide assembly.
Claim 7
Dependent Claim
32 words
The lifting apparatus of claim 1 including first swivel means cooperative between said base assembly and said bulkhead means for allowing pivotal movement of said bulkhead means about a generally vertical axis.
Claim 8
Dependent Claim
30 words
The lifting apparatus of claim 6 further comprising first locking means removably connectible to said bulkhead means to prevent pivotal movement of said bulkhead means on said first swivel means.
Claim 9
Dependent Claim
32 words
The lifting apparatus of claim 1 including second swivel means cooperative between said base assembly and said bulkhead means for allowing pivotal movement of said bulkhead means about a generally horizontal axis.
Claim 10
Dependent Claim
28 words
The lifting apparatus of claim 8 further comprising second locking means removably connectible to said bulkhead means to prevent pivotal movement of said bulkhead on said swivel means.
Claim 11
Dependent Claim
62 words
The lifting apparatus of claim 1 wherein said base assembly comprises a bearing portion having the movable ends of said guide assemblies connected thereto and a rotary portion mounted in said bearing portion for rotation about a generally vertical axis and wherein said bulkhead means is attached to said rotary portion generally opposite said guide assemblies for rotation with said rotary portion.
Claim 12
Dependent Claim
65 words
The lifting apparatus of claim 10 wherein said rotary portion of said base assembly comprises a generally vertical cylindrical element, and wherein said bearing portion comprises a pair of bearing caps disposed over respective ends of said cylindrical element and a spacer rigidly connected to each of said two caps and disposed generally on the opposite side of said base assembly from said bulkhead means.
Claim 13
Dependent Claim
43 words
The lifting apparatus of claim 10 further comprising a pair of laterally spaced first locking members removably connectible to said bulkhead means and to said support structure to prevent rotation of said cylindrical element and said bulkhead means about said generally vertical axis.
Claim 14
Dependent Claim
24 words
The lifting apparatus of claim 10 wherein said bulkhead means is rotatably mounted on said cylindrical element for rotation about a generally horizontal axis.
Claim 15
Dependent Claim
82 words
The lifting apparatus of claim 13 wherein said bulkhead means includes means defining a pair of abutment surfaces facing each other and spaced apart in a direction transverse to said generally horizontal axis said lifting apparatus further comprising a second locking member removably interconnectible between said cylindrical element and said bulkhead and including means for engaging said cylindrical element and means disposed between said abutment surfaces and abuting said abutment surfaces to prevent rotation of said bulkhead about said generally horizontal axis.
Claim 16
Dependent Claim
24 words
The lifting apparatus of claim 13 wherein said base assembly further comprises a holder on said cylindrical element for supporting said second locking member.
Claim 17
Dependent Claim
34 words
The lifting apparatus of claim 1 wherein said bulkhead means includes a main body portion, and holding means carried by said main body portion, said engagement means being removably mounted on said holding means.
Claim 18
Dependent Claim
21 words
The lifting apparatus of claim 16 wherein said engagement means is generally horizontally longitudinally adjustable with respect to said holding means.
Claim 19
Dependent Claim
48 words
The lifting apparatus of claim 17 wherein said engagement means extends away from said main body portion in a direction generally opposite said base assembly and wherein said bulkhead means further comprises bumper means disposed between said main body portion and the outer extremity of said engagement means.
Claim 20
Dependent Claim
50 words
The lifting apparatus of claim 16 wherein said holding means comprises two laterally spaced holder members each laterally extensible and retractable with respect to said main body portion, and wherein said engagement means comprises two engagement members each of which is mounted on a respective one of said holder members.
Claim 21
Dependent Claim
33 words
The lifting apparatus of claim 16 wherein said engagement means comprises a pair of generally horizontal lifting arms extending away from said main body portion in a direction generally opposite said base assembly.
Claim 22
Dependent Claim
23 words
The lifting apparatus of claim 20 wherein each of said lifting arms includes a rigid upstanding retaining element distal said main body portion.
Claim 23
Dependent Claim
26 words
The lifting apparatus of cliam 16 wherein said engagement means comprises a pair of laterally spaced ground gripping members each having a generally downwardly directed tooth.
Claim 24
Dependent Claim
26 words
The lifting apparatus of cliam 16 wherein said engagement means comprises a pair of laterally spaced ground gripping members each having a generally downwardly directed tooth.
Claim 25
Dependent Claim
54 words
The lifting apparatus of claim 16 wherein said engagement means comprises a foundation part mounted on said holding means and upstanding therefrom and a carrier part on said foundation part extending generally horizontally from said foundation part in a direction generally opposite said base assembly, and object gripping means carried by said carrier part.
Claim 26
Dependent Claim
23 words
The lifting apparatus of claim 23 wherein said carrier part is adjustable with respect to said foundation part in a generally vertical direction.
Claim 27
Dependent Claim
20 words
The lifting apparatus of claim 23 wherein said object gripping means comprises hook means flexibly suspended from said carrier part.
Claim 28
Dependent Claim
25 words
The lifting apparatus of claim 23 wherein said object gripping means comprises a cam member having cam surfaces which flare outwardly from top to bottom.
Claim 29
Dependent Claim
33 words
The lifting apparatus of claim 23 wherein said object gripping means comprises a pair of generally horizontal lifting arms extending away from said carrier part in a direction generally opposite said base assembly.
Claim 30
Dependent Claim
16 words
The lifting apparatus of claim 1 further comprising trailer hitch means carried by said bulkhead means.
References Cited (Backward Citations)
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Cited
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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) | 1979-01-12 | 1979-07-14 | 1980-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-12 | 1983-07-14 | 1984-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-12 | 1987-07-14 | 1988-01-13 | $7700.00 | Window Closed / Lapsed |