US4966383A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Logging trailer
Assignee: Individual
•
Filing: 1989-05-09
•
Granted: 1990-10-30
•
Expires: 2009-05-09
Abstract
Abstract An extended trailer to attach to a tractor. The trailer has a main reach able to attach to a tractor. An extension reach extends rearwardly of the main reach. A bridge over the main is rigidly attached to the main reach. There is a forward self steering axle for the extended trailer. Springs extend forward from the bridge to the forward axle. The extension has an intermediate axle and rear axles. A subframe carries the intermediate and rear axles and is pivotally attached to the bridge.
Inventors
- 👤 Harold Sjostrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:03
CPC Classifications
B; B60; B60P; B60P3/00; B60P3/40; B60G; B60G5/00; B60G5/01
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
92 words
An extended trailer to attach to a tractor and comprising: a main reach; means formed at the end of the main reach to attach to a tractor; a bridge extending over the main reach; a forward axle for the extended trailer; steerable mountings for wheels on the forward axle, the mounting having castor and camber; resilient means extending forward from the bridge to the forward axle; an intermediate axle on the extension; a rear axle on the extension; and a subframe carrying the intermediate and rear axles pivotally attached to the bridge.
Claim 2
Dependent Claim
92 words
An extended trailer to attach to a tractor and comprising: a main reach; means formed at the end of the main reach to attach to a tractor; a bridge extending over the main reach; a forward axle for the extended trailer; steerable mountings for wheels on the forward axle, the mounting having castor and camber; resilient means extending forward from the bridge to the forward axle; an intermediate axle on the extension; a rear axle on the extension; and a subframe carrying the intermediate and rear axles pivotally attached to the bridge.
Claim 3
Dependent Claim
20 words
A trailer as claimed in claim 1 in which the bridge member comprises spaced longitudinal members linked by cross members.
Claim 4
Dependent Claim
23 words
A trailer as claimed in claim 1 in which the resilient means are leaf springs attached to the bridge and the forward axle.
Claim 5
Dependent Claim
37 words
A trailer as claimed in claim 1 in which the subframe comprises longitudinal members linking the intermediate and rear axles at both sides of the extension; and support members extending from the longitudinal members to the bridge.
Claim 6
Dependent Claim
45 words
A trailer as claimed in claim 4 in which the support members are attached to a mounting plate; pivot pins attached to the bridge; and bearing blocks attached to the mounting plate whereby the plate can pivot about a transverse axis relative to the bridge.
Claim 7
Dependent Claim
15 words
A trailer as claimed in claim 1 including load support means extending from the bridge.
Claim 8
Dependent Claim
19 words
A trailer as claimed in claim 6 in which the load support means is pivotally attached to a bunk.
Claim 9
Dependent Claim
17 words
A trailer as claimed in claim 1 in which the steerable mountings are pivotal on the axle.
Claim 10
Dependent Claim
16 words
A trailer as claimed in claim 8 including steering link extending between the wheel mounting means.
Claim 11
Dependent Claim
101 words
A trailer as claimed in claim 9 having a steering arm extending from one wheel mounting means; a spring abutment on the axle, spaced from the steering arm; a spring arm extending from the steering arm and slidably received in the spring abutment; a spring received on the steering arm on each side of the spring abutment plate; whereby the spring will allow wheels attached to the forward axle to turn under the action of the castor and camber on application of a turning force but urge the wheels back to a straight ahead position in the absence of a force.
Claim 12
Dependent Claim
21 words
A trailer as claimed in claim 10 including a shock absorber extending from the steering arm to damp the spring action.
References Cited (Backward Citations)
US2359299A
Cited
US3993326A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-10-29 | 1994-04-30 | 1994-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-10-29 | 1998-04-30 | 1998-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-10-29 | 2002-04-30 | 2002-10-30 | $7700.00 | Window Closed / Lapsed |