Patent US3574332A successfully refreshed from Google Patents.
US3574332A
Expired / Lapsed
US
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Trailer lifting and dumping apparatus
Assignee: Individual
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Filing: 1969-06-09
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Granted: 1971-04-13
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Expires: 1989-06-09
Abstract
Abstract Apparatus for dumping a vehicle having a load carrying bed located at a conventional level and comprising an elongated platform on which the vehicle may be driven so as to cause the discharge end of the load carrying bed to engage an abutment having its upper surface at a level corresponding substantially to that of the load carrying bed. The platform is pivoted to rock about an axis at a level corresponding to that of the load carrying bed, thereby enabling the contents of the vehicle to be discharged onto a conveyor or the like without falling from the height at which the load carrying bed is located. The platform preferably includes a vertically adjustable gate to provide a variable size throat through which the vehicle''s contents must pass, thereby affording means for regulating the rate of discharge of the vehicle''s contents.
Inventors
- 👤 Clifford C Wetzel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:58
CPC Classifications
B; B65; B65G; B65G67/00; B65G2814/00; B65G2814/03; B65G2814/0347; B65G2814/0356; B65G2814/0359; B65G2814/0379; B65G2814/0385; B65G2814/0386; B65G2814/0389
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
72 words
Apparatus for dumping the contents of a vehicle having a load-carrying bed, said apparatus comprising an elongated frame for the accommodation of said vehicle; an abutment supported by said frame adjacent one end thereof at such level as to be abutted by said bed; means mounting said one end of said frame for rocking movement about an axis located substantially at said level; and means for rocking said frame about said axis.
Claim 2
Dependent Claim
72 words
Apparatus for dumping the contents of a vehicle having a load-carrying bed, said apparatus comprising an elongated frame for the accommodation of said vehicle; an abutment supported by said frame adjacent one end thereof at such level as to be abutted by said bed; means mounting said one end of said frame for rocking movement about an axis located substantially at said level; and means for rocking said frame about said axis.
Claim 3
Dependent Claim
21 words
Apparatus as set forth in claim 1 wherein said abutment includes resilient, deformable means adapted to be eNgaged by said bed.
Claim 4
Dependent Claim
49 words
Apparatus as set forth in claim 1 including gate means substantially spanning the width of said frame, and means mounting said gate means on said frame at a level above that of said abutment to provide a throat through which articles from said bed may pass over said abutment.
Claim 5
Dependent Claim
27 words
Apparatus as set forth in claim 3 including means for varying the position of said gate means above said abutment for varying the size of said throat.
Claim 6
Dependent Claim
13 words
The apparatus set forth in claim 1 including means for vibrating said frame.
Claim 7
Dependent Claim
29 words
The apparatus set forth in claim 1 wherein said frame is composed of tubular members extending longitudinally of said frame and other tubular members extending transversely of said frame.
Claim 8
Dependent Claim
26 words
The apparatus set forth in claim 1 including yieldable, resilient cushion means at opposite ends of said abutment and extending above the level of the latter.
Claim 9
Dependent Claim
44 words
The apparatus set forth in claim 1 including a base beneath said frame and on which said frame is supported, and wherein said rocking means comprises extensible and retractile means acting between said base and said frame for imparting rocking movement to the latter.
Claim 10
Dependent Claim
154 words
Apparatus for dumping the contents of a vehicle having a load-carrying bed provided with an upper surface, said apparatus comprising a base; an elongated frame adapted to accommodate said vehicle thereon; an abutment carried by said frame adjacent one end thereof in a position to be abutted by said vehicle and having an upper surface at a level corresponding substantially to that of the upper surface of said bed; means pivotally mounting said one end of said frame on said base for rocking movement of said frame about an axis substantially at the level of said upper surface of said abutment; and means for rocking said frame about said axis from a substantially horizontal position to a raised portion in which the other end of said frame is at a level above that of said axis, whereby the contents of said vehicle may be discharged by gravity across said upper surface of said abutment.
Claim 11
Dependent Claim
154 words
Apparatus for dumping the contents of a vehicle having a load-carrying bed provided with an upper surface, said apparatus comprising a base; an elongated frame adapted to accommodate said vehicle thereon; an abutment carried by said frame adjacent one end thereof in a position to be abutted by said vehicle and having an upper surface at a level corresponding substantially to that of the upper surface of said bed; means pivotally mounting said one end of said frame on said base for rocking movement of said frame about an axis substantially at the level of said upper surface of said abutment; and means for rocking said frame about said axis from a substantially horizontal position to a raised portion in which the other end of said frame is at a level above that of said axis, whereby the contents of said vehicle may be discharged by gravity across said upper surface of said abutment.
Claim 12
Dependent Claim
21 words
Apparatus as set forth in claim 9 wherein said abutment includes resilient, deformable means adapted to be engaged by said bed.
Claim 13
Dependent Claim
49 words
Apparatus as set forth in claim 9 including gate means substantially spanning the width of said frame, and means mounting said gate means on said frame at a level above that of said abutment to provide a throat through which articles from said bed may pass over said abutment.
Claim 14
Dependent Claim
27 words
Apparatus as set forth in claim 11 including means for varying the position of said gate means above said abutment for varying the size of said throat.
Claim 15
Dependent Claim
13 words
The apparatus set forth in claim 9 including means for vibrating said frame.
Claim 16
Dependent Claim
29 words
The apparatus set forth in claim 9 wherein said frame is composed of tubular members extending longitudinally of said frame and other tubular members extending transversely of said frame.
Claim 17
Dependent Claim
26 words
The apparatus set forth in claim 9 including yieldable, resilient cushion means at opposite ends of said abutment and extending above the level of the latter.
Claim 18
Dependent Claim
44 words
The apparatus set forth in claim 9 including a base beneath said frame and on which said frame is supported, and wherein said rocking means comprises extensible and retractile means acting between said base and said frame for imparting rocking movement to the latter.
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) | 1974-04-12 | 1974-10-12 | 1975-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-12 | 1978-10-12 | 1979-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-12 | 1982-10-12 | 1983-04-13 | $7700.00 | Window Closed / Lapsed |