US3826324A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trailer mover
Assignee: Individual
•
Filing: 1972-10-26
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Granted: 1974-07-30
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Expires: 1992-10-26
Abstract
Abstract A powered mover is disclosed herein for positioning a wheeled trailer or the like in a forward, rearward or pivotal direction which includes a drive drum associated with each wheel that is pivotally carried on the chassis of the trailer and operably coupled to a drive motor via a drive gear train whereby the exterior periphery of the drum frictionally engages with the tread of the trailer wheel in a driving relationship. A control mechanism is operatively carried on the chassis for positioning the drum into and out of engagement with the tire tread. Powered rotary movement and speed of the drum is imparted to the tire for driving the trailer in a selected direction in response to the direction of the drum rotation as determined by an electrical control circuit.
Inventors
- 👤 D Stevens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:28
CPC Classifications
B; B62; B62D; B62D59/00; B62D59/04; Y; Y10; Y10S; Y10S280/00; Y10S280/11
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
202 words
A trailer mover for positioning a trailer in a forward, rearward or pivoting direction comprising the combination of: a chassis having a pair of wheels rotatably carried on opposite sides of said chassis; drive means pivotally carried on said chassis for selective driving engagement and non-driving disengagement with the tread of said wheels; power means operably connected to said drive means for rotating said drive means for imparting a driving force to said wheels when said drive means is pivoted in driving engagement with said wheels; control means operably coupled to said power means and said drive means for pivoting said drive means into and out of engagement with said wheels and for starting and stopping said power means; said drive means includes a rotatable drum having its exterior periphery adapted to impart said driving force and said power means includes a DC reversible motor coupled in driving relationship to said drum; pivotal means mounting said power means and said drive means to said chasis; said pivotal means includes a bar extending transversely across the chassis and rotatably carried thereon; said bar having opposite ends terminating adjacent said wheels; and said power means and said drive means carried on said terminating ends.
Claim 2
Dependent Claim
202 words
A trailer mover for positioning a trailer in a forward, rearward or pivoting direction comprising the combination of: a chassis having a pair of wheels rotatably carried on opposite sides of said chassis; drive means pivotally carried on said chassis for selective driving engagement and non-driving disengagement with the tread of said wheels; power means operably connected to said drive means for rotating said drive means for imparting a driving force to said wheels when said drive means is pivoted in driving engagement with said wheels; control means operably coupled to said power means and said drive means for pivoting said drive means into and out of engagement with said wheels and for starting and stopping said power means; said drive means includes a rotatable drum having its exterior periphery adapted to impart said driving force and said power means includes a DC reversible motor coupled in driving relationship to said drum; pivotal means mounting said power means and said drive means to said chasis; said pivotal means includes a bar extending transversely across the chassis and rotatably carried thereon; said bar having opposite ends terminating adjacent said wheels; and said power means and said drive means carried on said terminating ends.
Claim 3
Dependent Claim
71 words
The invention as defined in claim 1 wherein said control means includes a control mechanism connected between said bar and said chassis comprising a bell crank secured to said bar, a rotatable handle carried on said chassis and a pair of control cables interconnecting said handle with said bell crank whereby rotation of said handle is translated into pivotal movement of said bar via said control cables and said bell crank.
Claim 4
Dependent Claim
20 words
The invention as defined in claim 2 including an over-center toggle mechanism operably connecting said handle to said control cables.
Claim 5
Dependent Claim
31 words
The invention as defined in claim 3 including a gear train operably connecting said motor to said drum and including a common housing for enclosing said motor and said gear train.
Claim 6
Dependent Claim
32 words
The invention as defined in claim 4 wherein said control means further includes an electrical circuit connected to said motor for determining drum speed and direction of rotation of said drive means.
Claim 7
Dependent Claim
26 words
The invention as defined in claim 5 wherein said bell crank, said control cables and said handle substantially lie along the longitudinal axis of said chassis.
Claim 8
Dependent Claim
33 words
The invention as defined in claim 6 wherein said drum exterior periphery depresses into the tread of said wheels in driving frictional engagement therewith when said drum is in engagement with said wheels.
Claim 9
Dependent Claim
169 words
A trailer mover for positioning a trailer in a forward, rearward or pivoting direction comprising the combination of: a chasis having a pair of wheels rotatably carried on opposite sides of said chassis; drive means pivotally carried on said chassis for selective driving engagement and non-driving disengagement with the tread of said wheels; power means operably connected to said drive means for rotating said drive means for imparting a driving force to said wheels when said drive means is pivoted in driving engagement with said wheels; control means operably coupled to said power means and said drive means for pivoting said drive means into and out of engagement with said wheels and for starting and stopping said power means; pivotal means mounting said power means and said drive means to said chasis; said pivotal means includes a bar extending transversely across the chassis and rotatably carried thereon; said bar having opposite ends terminating adjacent said wheels; and said power means and said drive means carried on said terminating ends.
Claim 10
Dependent Claim
169 words
A trailer mover for positioning a trailer in a forward, rearward or pivoting direction comprising the combination of: a chasis having a pair of wheels rotatably carried on opposite sides of said chassis; drive means pivotally carried on said chassis for selective driving engagement and non-driving disengagement with the tread of said wheels; power means operably connected to said drive means for rotating said drive means for imparting a driving force to said wheels when said drive means is pivoted in driving engagement with said wheels; control means operably coupled to said power means and said drive means for pivoting said drive means into and out of engagement with said wheels and for starting and stopping said power means; pivotal means mounting said power means and said drive means to said chasis; said pivotal means includes a bar extending transversely across the chassis and rotatably carried thereon; said bar having opposite ends terminating adjacent said wheels; and said power means and said drive means carried on said terminating ends.
Claim 11
Dependent Claim
47 words
The invention as defined in claim 8 wherein said control means includes a control mechanism connected between said bar and said chassis comprising a bell crank secured to said bar, a rotatable handle carried on said chassis and control cables interconnecting said handle with said bell crank.
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) | 1977-07-29 | 1978-01-28 | 1978-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-29 | 1982-01-28 | 1982-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-29 | 1986-01-28 | 1986-07-30 | $7700.00 | Window Closed / Lapsed |