US4696484A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dolly for towing vehicles
Assignee: HOLMES INTERNATIONAL Inc
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Filing: 1986-04-28
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Granted: 1987-09-29
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Expires: 2006-04-28
Abstract
Abstract A towing dolly has a pair of supports between which a pair of wheels of a disabled vehicle may be cradled, the supports being carried by rails on which respective pairs of rocker arms are pivotally mounted. Each rocker arm carries a dolly support wheel and a mounting adapted to that a hydraulic jack may be positioned between the pair of rocker arms of each rail. Upon actuation of the hydraulic jack the rails and thus the wheel engaging supports are raised relative to the axles of the dolly wheels, thereby raising the wheels of a disabled vehicle cradled on the supports. A locking device is carried by each rocker arm for cooperating with a respective hold-down block on the rails after the rocker arm has been pivoted by actuation of the hydraulic jack so that the hydraulic jack may be removed while the disabled vehicle is towed.
Inventors
- 👤 Robert Casey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:19
CPC Classifications
B; B66; B66F; B66F5/00; B66F5/04; B60; B60P; B60P3/00; B60P3/12; B60P3/125; B60P3/127; B60S; B60S13/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
283 words
A towing dolly for lifting and supporting a pair of laterally spaced wheels of a disabled vehicle for towing thereof, said dolly comprising a pair of side rails, a pair of spaced apart cross members, mounting means for removably connecting each cross member to both rails for supporting said cross members and for spacing said rails apart laterally, the cross members being adapted to support and cradle the wheels of the disabled vehicle thereon, a pair of pivot blocks for each side rail, journal means for pivotably mounting each pair of pivot blocks at spaced locations on the respective side rail, a rocker arm secured to each pivot block for moving therewith, the rocker arms of each side rail extending away from and in opposite directions to each other, support means for rotatably carrying a dolly support wheel on each rocker arm remote from a respective journal means, abutment means carried by each pivot block spaced from said journal means facing toward the other pivot block associated with each respective rail, a removable extendible jack means adapted to be placed selectively between and engage the abutment means associated with a respective rail, such that extension of the jack means forces the pair of blocks associated with a rail to pivot relative to the rail to lift the rail relative to the support wheels associated with that rail, and hold-down means for securing said rocker arms to the corresponding side rail when said rail has been raised so that said jack means may be removed from engagement with the abutment means associated with the lifted rail and repositioned between and engage the abutment means associated with the other rail for lifting said other rail.
Claim 2
Dependent Claim
283 words
A towing dolly for lifting and supporting a pair of laterally spaced wheels of a disabled vehicle for towing thereof, said dolly comprising a pair of side rails, a pair of spaced apart cross members, mounting means for removably connecting each cross member to both rails for supporting said cross members and for spacing said rails apart laterally, the cross members being adapted to support and cradle the wheels of the disabled vehicle thereon, a pair of pivot blocks for each side rail, journal means for pivotably mounting each pair of pivot blocks at spaced locations on the respective side rail, a rocker arm secured to each pivot block for moving therewith, the rocker arms of each side rail extending away from and in opposite directions to each other, support means for rotatably carrying a dolly support wheel on each rocker arm remote from a respective journal means, abutment means carried by each pivot block spaced from said journal means facing toward the other pivot block associated with each respective rail, a removable extendible jack means adapted to be placed selectively between and engage the abutment means associated with a respective rail, such that extension of the jack means forces the pair of blocks associated with a rail to pivot relative to the rail to lift the rail relative to the support wheels associated with that rail, and hold-down means for securing said rocker arms to the corresponding side rail when said rail has been raised so that said jack means may be removed from engagement with the abutment means associated with the lifted rail and repositioned between and engage the abutment means associated with the other rail for lifting said other rail.
Claim 3
Dependent Claim
23 words
A towing dolly as recited in claim 1, wherein said mounting means comprises means for adjustably connecting said cross members to said rails.
Claim 4
Dependent Claim
78 words
A towing dolly as recited in claim 2, wherein said means for adjustably connecting said cross members to said rails comprises a series of spaced vertically extending plates secured to each rail adjacent each end thereof, a pair of horizontally extending rods carried by each said series of plates in vertically spaced relationship, and a hanger bracket secured at each end of each cross member, said hanger bracket having spaced notches for receiving and resting on said rails.
Claim 5
Dependent Claim
58 words
A towing dolly as recited in claim 1, wherein said hold-down means comprises a keeper block corresponding to each rocker arm secured to the respective rails at dispositions beneath the respective rocker arm, and a locking member carried by each rocker arm adapted to be cooperatively secured to the respective keeper block when the rail has been raised.
Claim 6
Dependent Claim
37 words
A towing dolly as recited in claim 4, wherein each keeper block has a threaded bore and each locking member includes a threaded rod adapted to be threadedly received in the bore of a respective keeper block.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-09-28 | 1991-03-30 | 1991-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-09-28 | 1995-03-30 | 1995-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-09-28 | 1999-03-30 | 1999-09-29 | $7700.00 | Window Closed / Lapsed |