US3554394A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trailer and method for loading and unloading the same, in which only one workman need by used to carry out the method
Assignee: Individual
•
Filing: 1968-02-29
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Granted: 1971-01-12
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Expires: 1988-02-29
Abstract
Abstract A boat trailer having a U-shaped chassis, when loaded by one man, is moved thus passing the U-legs of the chassis beyond and on either side of the shoring member or members supporting the boat, whereupon removable support stocks are introduced into holes in the U-legs so as to interconnect said legs, thus enabling to lift the boat first at the stave and then at the stern by means of hydraulic means regulating the angle between the coupling arm of the trailer and the chassis to which said arm is pivoted.
Inventors
- 👤 John Gunnar Hedman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:39
CPC Classifications
B; B60; B60P; B60P3/00; B60P3/06; B60P3/10; B60P3/1033
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
95 words
A trailer for transferring loads comprising: a substantially U-shaped frame, having horizontal leg members, a wheel on each of the leg members, removable suPport means extending between the leg members comprising beams having eccentric grooves, the Ushaped frame having openings that are capable of accommodating the eccentric grooves, coupling arm means pivotally attached to the U-shaped frame, and control means operatively connected to the coupling arm means and frame to provide a relatively vertical rotation for varying the angle between the coupling arm means and the U-shaped frame to aid in transferring of the load.
Claim 2
Dependent Claim
95 words
A trailer for transferring loads comprising: a substantially U-shaped frame, having horizontal leg members, a wheel on each of the leg members, removable suPport means extending between the leg members comprising beams having eccentric grooves, the Ushaped frame having openings that are capable of accommodating the eccentric grooves, coupling arm means pivotally attached to the U-shaped frame, and control means operatively connected to the coupling arm means and frame to provide a relatively vertical rotation for varying the angle between the coupling arm means and the U-shaped frame to aid in transferring of the load.
Claim 3
Dependent Claim
110 words
A trailer for transferring loads comprising: a substantially U-shaped frame, having horizontal leg members, a wheel on each of the leg members, removable keel trestles capable of being mounted between the leg members and beams for locking the keel trestles in place, the leg members and beams for locking the keel trestles in place, the leg members having slots to accommodate the beams, coupling arm means pivotally attached to the U-shaped frame, and control means operatively connected to the coupling arms means and frame to provide a relative vertical rotation for varying the angle between the coupling arm means and the U-shaped frame to aid in transferring of the load.
Claim 4
Dependent Claim
110 words
A trailer for transferring loads comprising: a substantially U-shaped frame, having horizontal leg members, a wheel on each of the leg members, removable keel trestles capable of being mounted between the leg members and beams for locking the keel trestles in place, the leg members and beams for locking the keel trestles in place, the leg members having slots to accommodate the beams, coupling arm means pivotally attached to the U-shaped frame, and control means operatively connected to the coupling arms means and frame to provide a relative vertical rotation for varying the angle between the coupling arm means and the U-shaped frame to aid in transferring of the load.
Claim 5
Dependent Claim
131 words
A trailer for transferring loads comprising: a substantially U-shaped frame, having horizontal leg members, a wheel on each of the leg members, removable support means extending between the leg members, coupling arm means pivotally attached to the U-shaped frame, control means operatively connected to the coupling arm means and frame to provide a relative vertical rotation for varying the angle between the coupling arm means and the U-shaped frame to aid in transferring of the load, and shoring means adapted to cooperate with the trailer frame comprising a first support stock having a width smaller than the distance between the leg members of the U-shaped frame and a second support stock having collapsible side support members whereby the support stocks support the load when the trailer is being unloaded or loaded.
Claim 6
Dependent Claim
131 words
A trailer for transferring loads comprising: a substantially U-shaped frame, having horizontal leg members, a wheel on each of the leg members, removable support means extending between the leg members, coupling arm means pivotally attached to the U-shaped frame, control means operatively connected to the coupling arm means and frame to provide a relative vertical rotation for varying the angle between the coupling arm means and the U-shaped frame to aid in transferring of the load, and shoring means adapted to cooperate with the trailer frame comprising a first support stock having a width smaller than the distance between the leg members of the U-shaped frame and a second support stock having collapsible side support members whereby the support stocks support the load when the trailer is being unloaded or loaded.
Claim 7
Dependent Claim
100 words
A trailer transferring loads comprising; a frame having a shape substantially in the form of a double U with one U member located inside of the other to provide parallel legs, a shaft mounted on each pair of parallel legs, at least one wheel attached to each shaft to provide a pivot point with respect to the frame, at least one removable support beam, and at least one removable support keel trestle capable of being mounted between the legs of the inner U member, the legs having slots to accommodate the beam for locking the keel trestle to the frame.
Claim 8
Dependent Claim
100 words
A trailer transferring loads comprising; a frame having a shape substantially in the form of a double U with one U member located inside of the other to provide parallel legs, a shaft mounted on each pair of parallel legs, at least one wheel attached to each shaft to provide a pivot point with respect to the frame, at least one removable support beam, and at least one removable support keel trestle capable of being mounted between the legs of the inner U member, the legs having slots to accommodate the beam for locking the keel trestle to the frame.
Claim 9
Dependent Claim
14 words
A trailer according to claim 1, where the control means is a hydraulic jack.
Claim 10
Independent Claim
132 words
The method of unloading a boat from a trailer having a U-shaped frame, coupling arm, removable supports and collapsible support members comprising: the steps of rotating the U-shaped frame downward relative to the coupling arm, placing a first stock support under the keel of the boat adjacent the stern thereof; rotating the U-shaped frame upward until the boat is supported on the stock, removing the collapsible support members which are not supporting the boat, removing a keel support on the U-shaped frame, placing second stock support under the keel, rotating the U-shaped frame downward until the boat is supported only by the stocks, removing the removable supports that are located between the legs of the U-shaped frame, and the remaining collapsible supports, whereupon the trailer can be removed from the unloaded boat.
Claim 11
Independent Claim
132 words
The method of unloading a boat from a trailer having a U-shaped frame, coupling arm, removable supports and collapsible support members comprising: the steps of rotating the U-shaped frame downward relative to the coupling arm, placing a first stock support under the keel of the boat adjacent the stern thereof; rotating the U-shaped frame upward until the boat is supported on the stock, removing the collapsible support members which are not supporting the boat, removing a keel support on the U-shaped frame, placing second stock support under the keel, rotating the U-shaped frame downward until the boat is supported only by the stocks, removing the removable supports that are located between the legs of the U-shaped frame, and the remaining collapsible supports, whereupon the trailer can be removed from the unloaded boat.
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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |