US5823558A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trailer loading support
Assignee: Individual
•
Filing: 1997-01-31
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Granted: 1998-10-20
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Expires: 2017-01-31
Abstract
Abstract A load frame which mounts on a trailer between the trailer hitch connection and the trailer frame front cross member. The load frame is a wishbone-shaped structural unit which mounts to the trailer frame front cross member with a pivoting saddle on the two rear legs of the wishbone. The load frame includes a spindle mount connected to a wheel assembly and a retracting arm for engaging a retracting apparatus to adjust the relationship between the wheel assembly and the trailer frame. The spindle mount includes a suspension mechanism and a pivoting connection for the wheel assembly. The wheel assembly includes a spindle member which is slidably and rotatably attached to the spindle mount. A tire is rotatably attached to the wheel assembly. The tire extends downwardly from the spindle mount to roll along the ground and support a portion of the tongue weight of the trailer.
Inventors
- 👤 William A. Shoquist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:30
CPC Classifications
B; B60; B60D; B60D1/00; B60D1/24; B60D1/42; B60D1/46; B60D1/465; B60D1/58; B60D1/66; B60G; B60G3/00; B60S; B60S9/00; B60S9/14; B60S9/16; B60S9/18; B60S9/22
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
170 words
A device for reducing a load on a motor vehicle trailer hitch in combination with a rigid trailer frame, while the trailer is towed by the motor vehicle, comprising: (a) a load frame, the load frame having a top side, a bottom side, a front portion and a back portion, the back portion of the load frame pivotally connected to the trailer frame; (b) a wheel assembly comprising a sleeve affixed to the load frame and a spindle rotatably and slidably attached in the sleeve, and a tire rotatably attached to the spindle adjacent the bottom side of the load frame; (c) a suspension mechanism coupled between the wheel assembly and the load frame; and (d) a retracting apparatus, the retracting apparatus fixedly mounted to the trailer frame, and having an adjustment member bearing against the front portion of the load frame to thereby control and limit the pivot of the load frame about the pivotal connection to the trailer frame, to selectively adjust the loading on the trailer hitch.
Claim 2
Independent Claim
170 words
A device for reducing a load on a motor vehicle trailer hitch in combination with a rigid trailer frame, while the trailer is towed by the motor vehicle, comprising: (a) a load frame, the load frame having a top side, a bottom side, a front portion and a back portion, the back portion of the load frame pivotally connected to the trailer frame; (b) a wheel assembly comprising a sleeve affixed to the load frame and a spindle rotatably and slidably attached in the sleeve, and a tire rotatably attached to the spindle adjacent the bottom side of the load frame; (c) a suspension mechanism coupled between the wheel assembly and the load frame; and (d) a retracting apparatus, the retracting apparatus fixedly mounted to the trailer frame, and having an adjustment member bearing against the front portion of the load frame to thereby control and limit the pivot of the load frame about the pivotal connection to the trailer frame, to selectively adjust the loading on the trailer hitch.
Claim 3
Dependent Claim
32 words
The device of claim 1, wherein the load frame has a wishbone-shape, the load frame having a first leg on the front portion, a second and third leg on the back portion.
Claim 4
Dependent Claim
13 words
The device of claim 1, wherein the suspension mechanism comprises a coil spring.
Claim 5
Dependent Claim
12 words
The device of claim 1, wherein the retracting apparatus comprises a jack.
Claim 6
Dependent Claim
89 words
The device of claim 1, wherein the wheel assembly further comprises a tire support connected between the tire and the spindle, the spindle having a lower spindle end and an upper spindle end, the spindle connected to the tire support at the lower spindle end, the spindle rotatably and slidably movable in the sleeve connected to the load frame, intermediate the lower spindle end and the upper spindle end, a plurality of spindle holes in the upper spindle end of the spindle, the holes being spaced from each other.
Claim 7
Dependent Claim
26 words
The device of claim 5, wherein the wheel assembly lower spindle end further comprises a spring seat and a wear pad mounted on the spring seat.
Claim 8
Dependent Claim
47 words
The device of claim 5, wherein the sleeve further comprises a detent upper surface; and further comprising a pin removably mountable in any of the spindle holes on the spindle to bear against the detent surface and thereby limit the motion of the spindle in the sleeve.
Claim 9
Dependent Claim
35 words
The invention of claim 7, wherein the top end of the sleeve comprises a cam surface, the pin bearing against the cam surface as a cam follower to urge the spindle in a predetermined orientation.
Claim 10
Dependent Claim
158 words
A trailer towing support device comprising: (a) a load frame, the load frame having a top side, a bottom side, a forward portion and a rear portion; (b) a wheel assembly, the wheel assembly pivotally attached to the load frame, and having a tire rotatably connected to a tire support frame on the wheel assembly, adjacent to the bottom side of the load frame; the wheel assembly further comprising a spindle connected to the tire support frame, the spindle having a lower end and an upper spindle end, the spindle connected to the tire support frame at the lower spindle end, the spindle rotatably and slidable connected to the load frame intermediate the lower spindle end and the upper spindle end, a plurality of holes in the upper spindle end of the spindle, the spindle holes being spaced from each other; and (c) a suspension mechanism, the suspension mechanism bearing between the wheel assembly and the load frame.
Claim 11
Dependent Claim
158 words
A trailer towing support device comprising: (a) a load frame, the load frame having a top side, a bottom side, a forward portion and a rear portion; (b) a wheel assembly, the wheel assembly pivotally attached to the load frame, and having a tire rotatably connected to a tire support frame on the wheel assembly, adjacent to the bottom side of the load frame; the wheel assembly further comprising a spindle connected to the tire support frame, the spindle having a lower end and an upper spindle end, the spindle connected to the tire support frame at the lower spindle end, the spindle rotatably and slidable connected to the load frame intermediate the lower spindle end and the upper spindle end, a plurality of holes in the upper spindle end of the spindle, the spindle holes being spaced from each other; and (c) a suspension mechanism, the suspension mechanism bearing between the wheel assembly and the load frame.
Claim 12
Dependent Claim
84 words
The device of claim 9, wherein the load frame further comprises a spindle mount, the spindle mount having a sleeve, a top end and a bottom end on the sleeve, the spindle rotatably and slidably mounted in the sleeve with the tire adjacent the bottom end, the upper spindle end of the spindle extending outside the top end of the sleeve, and a pin removably mounted in one of the spindle holes to thereby limit the slidable motion of the spindle in the sleeve.
Claim 13
Dependent Claim
41 words
The invention of claim 10, wherein the sleeve has an upper edge comprising a cam surface, the pin bearing against the cam surface as a cam follower to urge the spindle in a predetermined orientation with respect to the load frame.
Claim 14
Independent Claim
196 words
A device for reducing a load on a motor vehicle trailer hitch in combination with a rigid trailer frame comprising: (a) a load frame, the load frame having a top side, a bottom side, a forward portion and a rear portion, a spindle mount mounted on the load frame comprising a sleeve having a top end, a cam surface on the top end, a spring saddle on the load frame, a retraction arm attached to the front portion of the load frame pivotally connected to the trailer frame; (b) a wheel assembly comprising a spindle connected to a tire support, the spindle rotatably and slidably mounted in the sleeve, a tire rotatably mounted on the tire support, a spring seat mounted on the wheel assembly; and (c) a spring coupled between the wheel assembly and the load frame, the spring mounted on the spring saddle and bearing against the spring seat; (d) a retracting apparatus fixably mounted to the trailer frame and having an adjustment member connected to the retracting arm and adjustable against the load frame, to thereby control and limit the pivot of the load frame about the pivotal connection to the trailer frame.
Claim 15
Independent Claim
196 words
A device for reducing a load on a motor vehicle trailer hitch in combination with a rigid trailer frame comprising: (a) a load frame, the load frame having a top side, a bottom side, a forward portion and a rear portion, a spindle mount mounted on the load frame comprising a sleeve having a top end, a cam surface on the top end, a spring saddle on the load frame, a retraction arm attached to the front portion of the load frame pivotally connected to the trailer frame; (b) a wheel assembly comprising a spindle connected to a tire support, the spindle rotatably and slidably mounted in the sleeve, a tire rotatably mounted on the tire support, a spring seat mounted on the wheel assembly; and (c) a spring coupled between the wheel assembly and the load frame, the spring mounted on the spring saddle and bearing against the spring seat; (d) a retracting apparatus fixably mounted to the trailer frame and having an adjustment member connected to the retracting arm and adjustable against the load frame, to thereby control and limit the pivot of the load frame about the pivotal connection to the trailer frame.
Claim 16
Dependent Claim
60 words
The invention of claim 12, wherein the trailer support device further comprises a plurality of holes in the spindle, a pin mounted in one of the holes in the spindle, the pin serving as a cam follower bearing against the cam surface of the sleeve to thereby urge the spindle in a predetermined orientation with respect to the load frame.
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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) | 2001-10-19 | 2002-04-20 | 2002-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-10-19 | 2006-04-20 | 2006-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-10-19 | 2010-04-20 | 2010-10-20 | $7700.00 | Window Closed / Lapsed |