Patent US3711158A successfully refreshed from Google Patents.
US3711158A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary trenches having adjustable depth control means
Assignee: Individual
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Filing: 1970-12-07
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Granted: 1973-01-16
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Expires: 1990-12-07
Abstract
Abstract A trench-forming device includes an elongate boom which is swingably mounted on a transverse drive shaft of a vehicle. A revolvable blade is carried by the outer end of the boom and is driven by an endless chain and sprocket which is connected to the drive shaft of the vehicle. An adjustable depth-control member is mounted on the boom to permit adjustable control of the depth of the trench being formed.
Inventors
- 👤 W Butcher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:03
CPC Classifications
B; B28; B28D; B28D1/00; B28D1/02; B28D1/04; B28D1/045; E; E02; E02F; E02F3/00; E02F3/04; E02F3/18; E02F3/188; E02F3/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
327 words
A trench -forming device for use with a vehicle having driven ground-engaging propulsion means and having a transverse horizontal drive shaft adjacent the rear end thereof, said device comprising, an elongate boom having an inner end and outer end, coupling means at the inner end of said boom swingably coupling said boom to the transverse shaft to permit vertical swinging movement of the boom about the shaft, a pair of bearing members mounted on opposite sides of said boom adjacent the outer end thereof, a revolvable driven shaft journaled in said bearing means and being disposed in substantially parallel relation to the drive shaft of the vehicle, a substantially flat generally circular blade affixed to said driven shaft and having a plurality of teeth in the periphery thereof, a guard member mounted on said boom and embracing at least a portion of said blade to prevent soil and the like from being thrown by the blade during operation of the blade, a pair of sprockets, one of which is secured to said driven shaft for rotation therewith, and the other sprocket adapted to be affixed to the transverse drive shaft of the vehicle for rotation therewith, an endless chain trained about said sprockets, an elongate substantially flat ground engaging depth-control member positioned below said boom adjacent the outer end thereof, and being engageable with the surface of the ground to limit penetration of the blade to the ground, said depth control member having an outer end arcuately bent upwardly and being pivotally connected adjacent its inner end with said boom to permit vertical swinging of the depth control member about a transverse horizontal axis spaced below said boom, an elongate apertured bracket secured to the outer end of said depth control member and projecting upwardly therefrom, means connected with the outer end portion of the boom and said bracket and being adjustable relative to the latter to variably limit the penetration of the blade into the ground.
Claim 2
Dependent Claim
327 words
A trench -forming device for use with a vehicle having driven ground-engaging propulsion means and having a transverse horizontal drive shaft adjacent the rear end thereof, said device comprising, an elongate boom having an inner end and outer end, coupling means at the inner end of said boom swingably coupling said boom to the transverse shaft to permit vertical swinging movement of the boom about the shaft, a pair of bearing members mounted on opposite sides of said boom adjacent the outer end thereof, a revolvable driven shaft journaled in said bearing means and being disposed in substantially parallel relation to the drive shaft of the vehicle, a substantially flat generally circular blade affixed to said driven shaft and having a plurality of teeth in the periphery thereof, a guard member mounted on said boom and embracing at least a portion of said blade to prevent soil and the like from being thrown by the blade during operation of the blade, a pair of sprockets, one of which is secured to said driven shaft for rotation therewith, and the other sprocket adapted to be affixed to the transverse drive shaft of the vehicle for rotation therewith, an endless chain trained about said sprockets, an elongate substantially flat ground engaging depth-control member positioned below said boom adjacent the outer end thereof, and being engageable with the surface of the ground to limit penetration of the blade to the ground, said depth control member having an outer end arcuately bent upwardly and being pivotally connected adjacent its inner end with said boom to permit vertical swinging of the depth control member about a transverse horizontal axis spaced below said boom, an elongate apertured bracket secured to the outer end of said depth control member and projecting upwardly therefrom, means connected with the outer end portion of the boom and said bracket and being adjustable relative to the latter to variably limit the penetration of the blade into the ground.
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) | 1976-01-16 | 1976-07-17 | 1977-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-16 | 1980-07-17 | 1981-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-16 | 1984-07-17 | 1985-01-16 | $7700.00 | Window Closed / Lapsed |