US3908292A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Articulated vehicle with trench filler and tamper
Assignee: Individual
•
Filing: 1973-06-14
•
Granted: 1975-09-30
•
Expires: 1993-06-14
Abstract
Abstract An articulated tractor-type vehicle having a supporting frame including a pivotable boom to which a steerable wheel is mounted. The supporting frame carries an adjustably positionable tamping unit and an adjustably positionable trench filling unit such as a drag conveyor to provide simultaneous filling and tamping of a trench. A novel reciprocating tamping unit having increased effectiveness and reduced shock transmission is described.
Inventors
- 👤 Marvin K Harris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:40
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/76; E02F3/78; E02F3/96; E02F3/961; E02F5/00; E02F5/22; E02F5/223; E02F5/30
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
99 words
A device for filling and tamping a trench comprising: a vehicle having a pivotable boom with a steerabLe wheel at its forward end, said pivotable boom being connected to said vehicle at a substantially vertical pivot point; arm means pivotally connected to said vehicle at one end thereof about a vertical pivotal point; a reciprocating tamping unit supported from the other end of the arm means; and a drag conveyor means pivotally mounted to said pivotable boom along a substantially vertical axis, whereby said tamping unit and said conveyor means are independently adjustable laterally with respect to said vehicle.
Claim 2
Independent Claim
99 words
A device for filling and tamping a trench comprising: a vehicle having a pivotable boom with a steerabLe wheel at its forward end, said pivotable boom being connected to said vehicle at a substantially vertical pivot point; arm means pivotally connected to said vehicle at one end thereof about a vertical pivotal point; a reciprocating tamping unit supported from the other end of the arm means; and a drag conveyor means pivotally mounted to said pivotable boom along a substantially vertical axis, whereby said tamping unit and said conveyor means are independently adjustable laterally with respect to said vehicle.
Claim 3
Dependent Claim
18 words
A device according to claim 1 wherein the steerable wheel supports the entire front portion of the device.
Claim 4
Dependent Claim
56 words
A device according to claim 1 wherein the drag conveyor is pivotally mounted about a substantially horizontal axis and has a means for permitting substantially 180* rotation about said substantially horizontal axis to and from a position substantially on one side of said boom and a position substantially on the other side of said pivotable boom.
Claim 5
Dependent Claim
18 words
A device according to claim 3 having means for tilting the drag conveyor about said substantially horizontal axis.
Claim 6
Dependent Claim
17 words
A device according to claim 4 having means for vertically adjusting the position of said drag conveyor.
Claim 7
Dependent Claim
37 words
A device according to claim 1 wherein said drag conveyor comprises two rotatably mounted members having a continuous flexible drive belt extending around said rotatably mounted members; and earth moving blades attached to said flexible drive belt.
Claim 8
Independent Claim
76 words
A device for filling a trench comprising: support means; a first member rotatably mounted to said support means; a second member rotatably mounted to said support means; a continuous flexible drive belt surrounding said first and second members; earth moving blades connected to said drive belt; means for moving said drive belt; and means for allowing said filling device to be pivoted substantially 180* about an axis of one of said first and second rotatable members.
Claim 9
Independent Claim
76 words
A device for filling a trench comprising: support means; a first member rotatably mounted to said support means; a second member rotatably mounted to said support means; a continuous flexible drive belt surrounding said first and second members; earth moving blades connected to said drive belt; means for moving said drive belt; and means for allowing said filling device to be pivoted substantially 180* about an axis of one of said first and second rotatable members.
Claim 10
Dependent Claim
26 words
A device as defined in claim 7 wherein said means for moving said drive belt is reversible to thereby drive the belt either clockwise or counterclockwise.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |