US3995876A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trailer dolly
Assignee: Individual
•
Filing: 1975-06-25
•
Granted: 1976-12-07
•
Expires: 1995-06-25
Abstract
Abstract A longitudinal frame has a conventional fifth wheel on its forward end and this end of the frame is supported on caster wheels. The rearward end of the frame has a depending portion provided with hitches on each side for connection to two hitch points on the front of a towing vehicle to form a longitudinally rigid extension of the towing vehicle. With this arrangement the operator faces the dolly. The hitches on the dolly are vertically adjustable to provide easy connection to the towing vehicle and to accommodate various ground conditions during connection. The fifth wheel assembly of the dolly is supported on an auxiliary longitudinally extending frame pivotally connected at a rearward point on the main frame, and an air lift bag assembly is provided between the auxiliary frame and the main frame for raising and lowering the fifth wheel assembly. A vertically adjustable pony wheel is provided at the rear of the main frame.
Inventors
- 👤 R. Mack Ronne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:32
CPC Classifications
B; B62; B62D; B62D63/00; B62D63/06; B62D63/062; B62D63/065; B60; B60D; B60D3/00; B62D13/00; B62D13/06; B62D53/00; B62D53/04; B62D53/08; B62D53/0807; B62D53/0821; B62D53/0857; B62D53/0864
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
134 words
A trailer dolly comprising a. a longitudinal main frame having forward and rearward ends, b. a conventional fifth wheel on a forward end of said main frame arranged for removable connection to the king pin of a trailer, c. a caster wheel assembly under the forward end of said main frame providing steerable wheel support of said dolly and a trailer when connected to said fifth wheel, d. and hitch means at the rearward end of said frame arranged to connect said dolly to a towing vehicle, e. said hitch means comprising a pair of hitch members located one on each side of said main frame for connection to a towing vehicle at two lateral points whereby said dolly when connected to a towing vehicle comprises a longitudinally rigid extension of the towing vehicle.
Claim 2
Dependent Claim
134 words
A trailer dolly comprising a. a longitudinal main frame having forward and rearward ends, b. a conventional fifth wheel on a forward end of said main frame arranged for removable connection to the king pin of a trailer, c. a caster wheel assembly under the forward end of said main frame providing steerable wheel support of said dolly and a trailer when connected to said fifth wheel, d. and hitch means at the rearward end of said frame arranged to connect said dolly to a towing vehicle, e. said hitch means comprising a pair of hitch members located one on each side of said main frame for connection to a towing vehicle at two lateral points whereby said dolly when connected to a towing vehicle comprises a longitudinally rigid extension of the towing vehicle.
Claim 3
Dependent Claim
32 words
The trailer dolly of claim 1 wherein one of said hitch members is disposed longitudinally rearward of the other to cause said main frame to be angled relative to the towing vehicle.
Claim 4
Dependent Claim
162 words
A trailer dolly in combination with a towing vehicle comprising a. a longitudinal main frame on said dolly having forward and rearward ends; b. a conventional fifth wheel on the forward end of said main frame arranged for removable connection to the king pin of a trailer, c. a caster wheel assembly under the forward end of said main frame providing steerable wheel support for said dolly and a trailer when connected to said fifth wheel, d. hitch means at the rearward end of said frame, e. and hitch means on the front of said towing vehicle arranged for removable connection to said hitch means on said dolly, f. said hitch means on said main frame and on said towing vehicle comprising a pair of hitch members located one on each side of said main frame and corresponding hitch members on said towing vehicle whereby said dolly when connected to said towing vehicle comprises a longitudinally rigid extension of said towing vehicle.
Claim 5
Dependent Claim
162 words
A trailer dolly in combination with a towing vehicle comprising a. a longitudinal main frame on said dolly having forward and rearward ends; b. a conventional fifth wheel on the forward end of said main frame arranged for removable connection to the king pin of a trailer, c. a caster wheel assembly under the forward end of said main frame providing steerable wheel support for said dolly and a trailer when connected to said fifth wheel, d. hitch means at the rearward end of said frame, e. and hitch means on the front of said towing vehicle arranged for removable connection to said hitch means on said dolly, f. said hitch means on said main frame and on said towing vehicle comprising a pair of hitch members located one on each side of said main frame and corresponding hitch members on said towing vehicle whereby said dolly when connected to said towing vehicle comprises a longitudinally rigid extension of said towing vehicle.
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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) | 1979-12-07 | 1980-06-07 | 1980-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-12-07 | 1984-06-07 | 1984-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-12-07 | 1988-06-07 | 1988-12-07 | $7700.00 | Window Closed / Lapsed |