US4763953A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trailer dump stop and stabilizer
Assignee: Watson and Chalin Manufacturing Inc
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Filing: 1987-01-09
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Granted: 1988-08-16
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Expires: 2007-01-09
Abstract
Abstract Disclosed is a device for stabilizing an air spring dumping trailer during dumping operations. Suspension hangers are affixed to the main support frame in front of the rear axle. Arm members are pivotally connected to the hangers and extend rearward past the rear axle. An axle seat is mounted to each of the arm members and air springs are provided between the axle seats in the main support frame. The section of the arm member which cantilevers past the rear axle is provided with a chock. A second chock is mounted to the main support frame. During trailer dumping operation, the air springs are deflated allowing the first and second chocks to interact with one another thereby creating a load transfer means between the main support frame and the arm member thereby bypassing the air springs.
Inventors
- 👤 Thomas N. Chalin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:30
CPC Classifications
B; B60; B60P; B60P1/00; B60P1/04; B60P1/16; B60P1/18; B60G; B60G11/00; B60G11/26; B60G11/27; B60G17/00; B60G17/005; B60G5/00; B60G5/04; B60G7/00; B60G7/04
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
117 words
A pivot stop for a dumping trailer comprising: (a) a plurality of primary frame members; (b) a hanger extending downward from each of said primary frame members; (c) an arm pivotally connected to each of said hangers; (d) an axle seat attached to each of said arms; (e) a set of air springs extending between said axle seats and said primary frame members; (f) a cantilever section of each of said arms extending beyond said axle seats; (g) a plurality of chocks mounted to and extending downward from said primary frame members for contacting each of said cantilever sections of said arms and for transferring load from said primary frame members to said arms during dumping operations.
Claim 2
Dependent Claim
117 words
A pivot stop for a dumping trailer comprising: (a) a plurality of primary frame members; (b) a hanger extending downward from each of said primary frame members; (c) an arm pivotally connected to each of said hangers; (d) an axle seat attached to each of said arms; (e) a set of air springs extending between said axle seats and said primary frame members; (f) a cantilever section of each of said arms extending beyond said axle seats; (g) a plurality of chocks mounted to and extending downward from said primary frame members for contacting each of said cantilever sections of said arms and for transferring load from said primary frame members to said arms during dumping operations.
Claim 3
Dependent Claim
95 words
An air spring suspension dump trailer stabilizing device comprising: (a) a support frame to which the trailer is mounted; (b) a plurality of hangers connected to said support frame; (c) an arm member pivotally connected to each of said hangers; (d) an axle seat affixed to each of said arm members; (e) air springs extending from said axle seats to said support frame; (f) load transfer means affixed to a cantilever section of said arm members, said load transfer means serving to transfer load from said support frame to said arm members during dumping operations.
Claim 4
Dependent Claim
95 words
An air spring suspension dump trailer stabilizing device comprising: (a) a support frame to which the trailer is mounted; (b) a plurality of hangers connected to said support frame; (c) an arm member pivotally connected to each of said hangers; (d) an axle seat affixed to each of said arm members; (e) air springs extending from said axle seats to said support frame; (f) load transfer means affixed to a cantilever section of said arm members, said load transfer means serving to transfer load from said support frame to said arm members during dumping operations.
Claim 5
Dependent Claim
60 words
A device for stabilizing air spring suspension trailers during dumping operations as recited in claim 2 further comprising: (a) a lift air spring mounted to said support frame; (b) a lift saddle residing on top of said air spring; (c) a chain affixed at a first end to said lift saddle and at a second end to said arm member.
Claim 6
Dependent Claim
40 words
A device for stabilizing an air spring suspension dump trailer during dumping operation as recited in claim 2 wherein said load transfer means is a travel stop for said arm members preventing further upward rotational movement of said arm members.
Claim 7
Dependent Claim
43 words
A device for stabilizing air spring suspension dump trailers during dumping operations as recited in claim 2 wherein said load transfer means comprises a first chock mounted to each of said arm members and a second corresponding chock attached to said support frame.
Claim 8
Dependent Claim
27 words
A device for stabilizing an air spring suspension dump trailer during dumping operations as recited in claim 5, wherein said first and second chocks have mating surfaces.
Claim 9
Dependent Claim
45 words
A device for stabilizing an air spring suspension dump trailer during dumping operations as recited in claim 5, wherein said first chock has a convex surface and said second chock has a concave surface, said convex surface mating with said concave surface during dumping operations.
Claim 10
Dependent Claim
45 words
A device for stabilizing an air spring suspension dump trailer during dumping operations as recited in claim 5, wherein said first chock has a concave surface and said second chock has a convex surface, said convex surface mating with said concave surface during dumping operations.
Claim 11
Independent Claim
135 words
A device for stabilizing an air spring suspension dump trailer during dumping operations comprising: (a) a support frame; (b) a plurality of axle seats; (c) a plurality of air springs extending from said support frame to said axle seats; (d) a plurality of hangers affixed to said support frames; (e) a plurality of arm members have proximal and distal ends, said proximal end of each of said arm members being pivotally connected to said hangers with said axle seats being connected to said arm members between said proximal and distal ends; (f) a first set of chocks mounted to said arm members between said axle seats and said distal ends; (g) a second set of chocks affixed to said support frame, said first set of chocks contacting said second set of chocks during dumping operations.
Claim 12
Independent Claim
135 words
A device for stabilizing an air spring suspension dump trailer during dumping operations comprising: (a) a support frame; (b) a plurality of axle seats; (c) a plurality of air springs extending from said support frame to said axle seats; (d) a plurality of hangers affixed to said support frames; (e) a plurality of arm members have proximal and distal ends, said proximal end of each of said arm members being pivotally connected to said hangers with said axle seats being connected to said arm members between said proximal and distal ends; (f) a first set of chocks mounted to said arm members between said axle seats and said distal ends; (g) a second set of chocks affixed to said support frame, said first set of chocks contacting said second set of chocks during dumping operations.
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) | 1991-08-16 | 1992-02-15 | 1992-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-16 | 1996-02-15 | 1996-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-16 | 2000-02-15 | 2000-08-16 | $7700.00 | Window Closed / Lapsed |