US4958845A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extendable trailer apparatus
Assignee: Individual
•
Filing: 1989-06-19
•
Granted: 1990-09-25
•
Expires: 2009-06-19
Abstract
Abstract Extendable trailer apparatus includes a fixed frame and a frame slidably connected to the fixed frame and movable relative to the fixed frame for lengthening and shortening the trailer apparatus. The movable rear frame includes an axle and wheels secured to it, and a load is secured to the fixed frame. The two frames are movable for adjusting the weight of the load on trailer axles including axles secured to the fixed portion of the trailer and an axle or axles secured to the movable frame. One embodiment of the apparatus includes an end dump bed with tapered sides and a sloping bottom for enhancing the dumping capabilities.
Inventors
- 👤 Donald J. Parks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:45
CPC Classifications
B; B62; B62D; B62D53/00; B62D53/04; B62D53/06; B62D53/067; B62D53/068
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
313 words
Extendable trailer apparatus, comprising in combination: first frame means for supporting a load to be hauled having a first overall length, including bed means on which the load is disposed, first beam means secured to the bed means for supporting the bed means and the load, and second beam means spaced apart from and disposed generally parallel to the first beam means and secured to the bed means for supporting the bed means and the load with the first beam means; second frame means movable relative to the first frame means between an open and a closed position, including third beam means having a first full length and disposed adjacent to the first beam means for movement relative to the first beam means, fourth beam means having a second full length and disposed adjacent to the second beam means for movement relative to the second beam means, slider means secured to the third and fourth beam means and extending substantially the first and second full lengths of the third and fourth beam means for guiding the first and third beam means and the second and fourth beam means as the third and fourth beam means move relative to the first and second beam means and on which the first and second beam means are disposed, wherein the first frame means further includes first slide bar means secured to the first and second beam means and slidable on the third and fourth beam means as the first and second frame means move relative to each other between the open and closed positions and the first and third beam means includes webs with which the first slide bar means is aligned, and wheel and axle means operatively secured to the third and fourth beam means for supporting the first and second frame means; and locking means for securing the first and second frame means together.
Claim 2
Dependent Claim
313 words
Extendable trailer apparatus, comprising in combination: first frame means for supporting a load to be hauled having a first overall length, including bed means on which the load is disposed, first beam means secured to the bed means for supporting the bed means and the load, and second beam means spaced apart from and disposed generally parallel to the first beam means and secured to the bed means for supporting the bed means and the load with the first beam means; second frame means movable relative to the first frame means between an open and a closed position, including third beam means having a first full length and disposed adjacent to the first beam means for movement relative to the first beam means, fourth beam means having a second full length and disposed adjacent to the second beam means for movement relative to the second beam means, slider means secured to the third and fourth beam means and extending substantially the first and second full lengths of the third and fourth beam means for guiding the first and third beam means and the second and fourth beam means as the third and fourth beam means move relative to the first and second beam means and on which the first and second beam means are disposed, wherein the first frame means further includes first slide bar means secured to the first and second beam means and slidable on the third and fourth beam means as the first and second frame means move relative to each other between the open and closed positions and the first and third beam means includes webs with which the first slide bar means is aligned, and wheel and axle means operatively secured to the third and fourth beam means for supporting the first and second frame means; and locking means for securing the first and second frame means together.
Claim 3
Dependent Claim
32 words
The apparatus of claim 1 in which the first frame means includes stop means for stopping the relative movement of the first and second frame means in the open and closed positions.
Claim 4
Dependent Claim
49 words
The apparatus of claim 1 in which the first and second beam means each include respectively a first flange and a second flange, and the third and fourth beam means each include respectively a third flange and a fourth flange disposed respectively adjacent to the first and second flanges.
Claim 5
Dependent Claim
52 words
The apparatus of claim 3 in which the first slide bar means secured to the first and second beam means includes a first slide bar secured to the first flange, and slidable on the third flange, and a second slide bar secured to the second flange and slidable on the fourth flange.
Claim 6
Dependent Claim
43 words
The apparatus of claim 4 in which the slider means of the second frame means further includes first slide means secured to the third and fourth beam means and slidable on the first and second flanges of the first and second beam means.
Claim 7
Dependent Claim
47 words
The apparatus of claim 5 in which the first slide means includes a first slide element secured to the third flange and receiving a portion of the first flange, and a second slide element secured to the fourth flange and receiving a portion of the second flange.
Claim 8
Dependent Claim
91 words
The apparatus of claim 1 in which the bed means includes: a front side having a first width, a tail gate remote from the front side and having a second width which is wider than the first width, side means extending from the front side of the tail gate, including portions tapering inwardly between the tail gate and the front side, and bottom means extending from the front side to the tail gate, including a downwardly tapering portion extending rearwardly from the front side to provide a sloping first bottom portion.
Claim 9
Dependent Claim
30 words
The apparatus of claim 7 in which the bottom means further includes a generally horizontally disposed second bottom portion extending from the sloping first bottom portion to the tail gate.
Claim 10
Dependent Claim
27 words
The apparatus of claim 8 in which the bottom means includes means for pivoting the bed means relative to the first frame means for dumping the load.
Claim 11
Dependent Claim
17 words
The apparatus of claim 8 in which the side means includes means for pivoting the tail gate.
Claim 12
Dependent Claim
87 words
The apparatus of claim 1 in which the locking means includes pin means, including a pin movable between a lock position and an unlock position to respectively lock and unlock the first and second frame means, and aperture means, including a first aperture for receiving the pin of the pin means to lock the first and second frame means in the open position and a second aperture for receiving the pin of the pin means to lock the first and second frame means in the closed position.
Claim 13
Dependent Claim
22 words
The apparatus of claim 1 in which the first and second beam means include flanges disposed and movable within the slider means.
Claim 14
Dependent Claim
77 words
The apparatus of claim 12 in which the first and second slide bars extend along the third and fourth beam means, and the slider means, the first and second beam means, and the third and fourth beam means cooperate to define enclosures for the first and second slide bars and the flanges disposed within the slider means for preventing the entrance of undesirable elements and for retaining a lubricant for the slider means and the slide bars.
References Cited (Backward Citations)
US1621075A
Cited
US1627336A
Cited
US2682419A
Cited
US2831735A
Cited
US2831700A
Cited
US2841411A
Cited
US2835504A
Cited
US3152837A
Cited
US3146000A
Cited
US3181914A
Cited
FR1464476A
Cited
US3410576A
Cited
US3508762A
Cited
US3729214A
Cited
US3893710A
Cited
US4021074A
Cited
FR2379400A1
Cited
US4111450A
Cited
US4365820A
Cited
US4397476A
Cited
US4429892A
Cited
US4526395A
Cited
US4478547A
Cited
US4561671A
Cited
US4566714A
Cited
US4580805A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-09-24 | 1994-03-26 | 1994-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-09-24 | 1998-03-26 | 1998-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-09-24 | 2002-03-26 | 2002-09-25 | $7700.00 | Window Closed / Lapsed |