Patent US3618982A successfully refreshed from Google Patents.
US3618982A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drawbar for articulated vehicle
Assignee: Caterpillar Inc
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Filing: 1969-07-18
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Granted: 1971-11-09
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Expires: 1989-07-18
Abstract
Abstract A drawbar mechanism for a vehicle made of two sections articulately connected as by a vertical pivot pin and which vehicle is steered by angling the two sections with relation to each other about the pin. The drawbar is pivoted for swinging movement behind the rear of the rearmost section and there is a connection between the forward section and the drawbar to cause the drawbar to swing in a direction opposite to that in which the vehicle is steered, thus reducing the magnitude of movement of the drawbar away from the direction of travel of the vehicle.
Inventors
- 👤 John A Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:31
CPC Classifications
B; B62; B62D; B62D12/00; B64; B64F; B64F1/00; B64F1/22; B64F1/223; B64F1/225; B64F1/227
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
121 words
In an articulated towing vehicle having a front section means and a rear section means which section means are pivotally connected together for steering, a towing drawbar means pivotally connected to said rear section means intermediate front and rear ends thereof said, towing drawbar means extending axially beyond said rear end of said rear section means and capable of swinging movement about its pivot connection to said rear section means, and separate means movable with respect to said drawbar means and pivoted to said front section means and operable when said front section means is turning in one direction to coact with said drawbar means and to cause said drawbar means to swing in an opposite direction about its pivot connection.
Claim 2
Dependent Claim
121 words
In an articulated towing vehicle having a front section means and a rear section means which section means are pivotally connected together for steering, a towing drawbar means pivotally connected to said rear section means intermediate front and rear ends thereof said, towing drawbar means extending axially beyond said rear end of said rear section means and capable of swinging movement about its pivot connection to said rear section means, and separate means movable with respect to said drawbar means and pivoted to said front section means and operable when said front section means is turning in one direction to coact with said drawbar means and to cause said drawbar means to swing in an opposite direction about its pivot connection.
Claim 3
Dependent Claim
32 words
The drawbar system of claim 5 in which the separate means comprises a rigid bar member pivoted to said front section means and engaging the drawbar means of said rear section means.
Claim 4
Dependent Claim
36 words
The drawbar system of claim 2 in which said rigid bar member pivoted to said front section means has a slidable connection with said drawbar means of said rear section means to maintain longitudinal alignment therewith.
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) | 1974-11-08 | 1975-05-10 | 1975-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-08 | 1979-05-10 | 1979-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-08 | 1983-05-10 | 1983-11-09 | $7700.00 | Window Closed / Lapsed |