Patent US3599812A successfully refreshed from Google Patents.
US3599812A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crane and tow unit
Assignee: Individual
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Filing: 1969-12-15
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Granted: 1971-08-17
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Expires: 1989-12-15
Abstract
Abstract A unit in one position on caster wheels for use as a crane for lifting engines while in another position of operation being carried on a second set of wheels only for transport or towing other vehicles. The boom is extendable, pivotal and rotatable and when the unit is used as a towing device it will lift a towed vehicle through a cable arrangement on the opposite side from the boom while the boom is being raised. When the unit is in a crane position a pair of outwardly extending members having casters thereon extend below the boom and stabilize the unit while these same members in the towing position are interconnected by a hitch assembly for attachment to a towing vehicle.
Inventors
- 👤 Roger D Hasstedt
- 👤 Kenneth L Hasstedt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:53
CPC Classifications
B; B66; B66C; B66C23/00; B66C23/18; B66C23/36; B66C23/48; B60; B60P; B60P3/00; B60P3/12; B60P3/125; B60P3/127
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
123 words
A crane and tow unit comprising, a cross frame having an upstanding standard, a first pair of wheels also mounted at opposite ends of said cross frame, a second pair of wheels at opposite ends of said cross frame and being rotatable on the opposite side of said cross frame from which said first pair of wheels are rotated, said standard being pivotally connected to said cross frame, lever means connected to said frame and extending perpendicular therefrom for pivoting said cross frame relative to said standard between a first position with said first pair of wheels only engaging the ground and the second position with only said second pair of wheels engaging the ground, and lifting means connected to said upstanding standard.
Claim 2
Dependent Claim
123 words
A crane and tow unit comprising, a cross frame having an upstanding standard, a first pair of wheels also mounted at opposite ends of said cross frame, a second pair of wheels at opposite ends of said cross frame and being rotatable on the opposite side of said cross frame from which said first pair of wheels are rotated, said standard being pivotally connected to said cross frame, lever means connected to said frame and extending perpendicular therefrom for pivoting said cross frame relative to said standard between a first position with said first pair of wheels only engaging the ground and the second position with only said second pair of wheels engaging the ground, and lifting means connected to said upstanding standard.
Claim 3
Dependent Claim
21 words
The structure of claim 1 wherein said first pair of wheels are connected to said cross frame by a swivel means.
Claim 4
Dependent Claim
22 words
The structure of claim 2 wherein said second pair of wheels are substantially larger in diameter then said first pair of wheels.
Claim 5
Dependent Claim
30 words
The structure of claim 3 wherein said lever means includes in said first position a pair of spaced apart horizontally extending members having swivel wheels in engagement with the ground.
Claim 6
Dependent Claim
37 words
The structure of claim 3 wherein said lifting means includes a horizontally extending extendable boom adapted to be rotated about the longitudinal axis of said standard and power means for pivoting said boom in a vertical plane.
Claim 7
Dependent Claim
39 words
The structure of claim 3 wherein said lever means includes a pair of horizontally extending spaceD-apart members when said cross frame is in said second position, and a hitch assembly interconnecting said members for connection with a towing vehicle.
Claim 8
Dependent Claim
64 words
The structure of claim 6 wherein said lifting means includes a horizontally extending boom on said standard, power means for pivoting said boom in a vertical plane, a lift cable extending over top and bottom pulleys on said standard, thence upwardly into engagement with said boom, and a vehicle griping means on the end of said cable opposite said end connected to said boom.
Claim 9
Dependent Claim
68 words
The structure of claim 7 wherein said boom and pair of members are positioned on the opposite side of said standard from said griping means, and an adjustable extension means interconnects said pair of members to said standard for selective pivoting of said standard relative to the vertical for selective positioning of a load connected to said griping means over said second pair of wheels and cross frame.
Claim 10
Dependent Claim
65 words
The structure of claim 4 wherein a hitch means is provided on the outer end of said standard, and said second pair of wheels being adapted to engage the ground only upon said pair of members being pivoted 90* to a vertical position and said standard being pivoted to a horizontal position whereby said hitch means is adapted to be connected to a towing vehicle.
Claim 11
Dependent Claim
70 words
The structure of claim 1 wherein said second pair of wheels are substantially larger in diameter than said first pair of wheels, and the relative size and location of said first and said second pair of wheels are such that pivoting of said cross frame through 90* to 180* from said first position to said second position will place only the second pair of wheels in contact with the ground.
References Cited (Backward Citations)
US3145857A
Cited
US3154290A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-16 | 1975-02-15 | 1975-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-16 | 1979-02-15 | 1979-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-16 | 1983-02-15 | 1983-08-17 | $7700.00 | Window Closed / Lapsed |