Patent US4419038A successfully refreshed from Google Patents.
US4419038A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bumper mounted foldable crane hoist
Assignee: Individual
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Filing: 1981-07-02
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Granted: 1983-12-06
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Expires: 2001-07-02
Abstract
Abstract A foldable hoist assembly has an elongated column with a boom pivotally mounted at its outer end to be moveable from a stored position alongside the column to its operating position. A spindle with radial and thrust bearings in the support column base provides rotary support so that loads suspended from the bottom can be swung over and away from the load bed. The base of the support column is also pivotally mounted on a horizontal support structure affixed to the vehicle chassis, preferably in the position of a bumper below te rear edge of the load bed. With boom stored alongside, the support column is rotated from its upright operating position to be supported horizontally within the support structure leaving the load bed unobstructed.
Inventors
- 👤 Billy D. Pendergraft
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:30
CPC Classifications
B; B60; B60P; B60P1/00; B60P1/54; B60P1/5485; B60P1/5495
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
320 words
A bumper mounted foldable crane hoist for vehicles having a chassis and a load bed with a tail gate forming an access opening to said load bed comprising: an elongated horizontal housing structure having a bottom and spaced apart end and side walls, means affixed to one of said side wall for mounting said housing to the vehicle chassis below the level of the load bed along the edge of the access opening, said housing forming a bumper for the vehicle; an elongated support column with a base section attached to one end thereof, shaft means pivotally mounting: said base section on a horizontal axis between said side walls at one end of said housing structure to facilitate the movement of said support column in a vertical plane relative to said housing structure from a stored horizontal position with said support column lying within and extending along the length of said housing structure to a fixed upright operating position with said support column disposed perpendicular to said housing structure; means on said base section for maintaining said support column in said fixed upright operating position; an elongated boom pivotally mounted on the other end of said support column opposite said base section to move from a stored position alongside said support column to an operating position extending outwardly from the axis of said support column; a hoist line mounted on said boom for handling a load, means on said housing for applying a hoisting force to said hoist line, means mounted on said base section which are selectively and operatively connectable with said hoist line to pivot said support column to said upright operating position; anti-friction bearing means mounted within said support column and base section for supporting said boom for rotation about the central axis of said support column relative to said base section to shift loads suspended by said hoist line over and away from said load bed.
Claim 2
Dependent Claim
320 words
A bumper mounted foldable crane hoist for vehicles having a chassis and a load bed with a tail gate forming an access opening to said load bed comprising: an elongated horizontal housing structure having a bottom and spaced apart end and side walls, means affixed to one of said side wall for mounting said housing to the vehicle chassis below the level of the load bed along the edge of the access opening, said housing forming a bumper for the vehicle; an elongated support column with a base section attached to one end thereof, shaft means pivotally mounting: said base section on a horizontal axis between said side walls at one end of said housing structure to facilitate the movement of said support column in a vertical plane relative to said housing structure from a stored horizontal position with said support column lying within and extending along the length of said housing structure to a fixed upright operating position with said support column disposed perpendicular to said housing structure; means on said base section for maintaining said support column in said fixed upright operating position; an elongated boom pivotally mounted on the other end of said support column opposite said base section to move from a stored position alongside said support column to an operating position extending outwardly from the axis of said support column; a hoist line mounted on said boom for handling a load, means on said housing for applying a hoisting force to said hoist line, means mounted on said base section which are selectively and operatively connectable with said hoist line to pivot said support column to said upright operating position; anti-friction bearing means mounted within said support column and base section for supporting said boom for rotation about the central axis of said support column relative to said base section to shift loads suspended by said hoist line over and away from said load bed.
Claim 3
Dependent Claim
56 words
The bumper mounted foldable crane hoist of claim 1 wherein: said housing structure is an open top box-shaped enclosure that is mounted at the rear of the vehicle in the position of a bumper with said side and bottom walls surrounding the sides and bottom of said support column and said boom in their stored positions.
Claim 4
Dependent Claim
72 words
The bumper mounted foldable crane hoist of claim 2 wherein: said means affixed to one of said side wall includes spaced apart bracket means affixed near opposite ends of said box-shaped enclosure to be mounted on adjacent rearward extensions of the vehicle chassis normally used to mount a rear bumper; and, said elongated support column is pivotally mounted between the side walls of said box-shaped enclosure adjacent one of said bracket means.
Claim 5
Dependent Claim
55 words
The bumper mounted foldable crane hoist of claim 1 wherein: said support column has an outward extension rotatably supported on said base section to rotate with said boom relative to said base section during operation to swing loads suspended beneath the outer end of said boom between positions over and away from said load bed.
Claim 6
Dependent Claim
26 words
The bumper mounted foldable crane hoist of claim 4 further comprising: spindle means having anti-friction radial and thrust bearing means for rotatably supporting said outward extension.
Claim 7
Dependent Claim
76 words
The bumper mounted foldable crane hoist of claim 1 further comprising: said hoist line having a free end attachable to a load; said means for applying a hoisting force includes drive means mounted on one end of said housing; and guide means for maintaining the hoist line in a path from the drive means along the support column to the outer end of said boom where a load attached to the free end is suspended beneath.
Claim 8
Dependent Claim
94 words
The bumper mounted foldable crane hoist of claim 1 wherein: said base section has an L-shape with a rigid projection extending radially outward from the pivotal mounting on said base section and perpendicular to the axis of elongation of said support column; and, said means for maintaining said support column in said fixed operating position includes releasable engaging means for rigidly securing said projection at a location near its outer end away from the pivotal mounting on said base section to said housing structure to hold said support column in a rigid upright position.
Claim 9
Dependent Claim
54 words
The bumper mounted foldable crane hoist of claim 7 comprising: said means for applying a hoisting force includes drive means disposed within said house at one end thereof; and, guide means for maintaining the hoist line in a path from the drive means along the support column to the outer end of said boom.
Claim 10
Dependent Claim
165 words
The bumper mounted foldable crane hoist of claim 8 wherein: said hoist line guide means includes a first guide roller at the far end of said support column and a second guide roller mounted on said base section adjacent the outer end of said rigid projection to be below the pivotal mounting on said base section when said support column is in its stored horizontal position, said hoist line extending from said drive means to pass under and around said second guide roller to said first guide roller at the far end of said support column and back to said rigid projection, and said means to selectively pivot said support column to said operating position includes means for attaching the free end of said hoist line adjacent said second roller whereby application of a hoisting force by said drive means applies an upward leverage force on said second guide roller and on said attaching means for pivoting said support column to its upright operating position.
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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) | 1986-12-05 | 1987-06-06 | 1987-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-05 | 1991-06-06 | 1991-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-05 | 1995-06-06 | 1995-12-06 | $7700.00 | Window Closed / Lapsed |