Patent US3825072A successfully refreshed from Google Patents.
US3825072A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic upper link sensing
Assignee: Deutz Allis Corp
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Filing: 1972-09-28
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Granted: 1974-07-23
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Expires: 1992-09-28
Abstract
Abstract Electronic draft load sensing on the upper link of a three point hitch operating in combination with a hydraulic weight distribution system on a draft vehicle.
Inventors
- 👤 E Collins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:46
CPC Classifications
A; A01; A01B; A01B63/00; A01B63/02; A01B63/10; A01B63/111; A01B63/112
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
169 words
An electronic sensing system for use on a vehicle having a three-point hitch comprising, a pair of lower draft arms, and an upper link for connection to an implement, a bracket including a cantilever beam with mounting means supported on said vehicle, connecting means on said cantilever beam connected to said upper link, a strain gauge support portion on said cantilever beam intermediate said mounting means and said connecting means, a hydraulic weight distribution system on said vehicle having hydraulic means for raising and lowering said lower draft arms including a hydraulic valve having electrical operating means, an electronic control circuit including a strain gauge means and said electrical operating means for controlling said hydraulic valve in said hydraulic weight distribution system, said strain gauge means mounted on said strain gauge support portion of said bracket for sensing compressive and tensive forces from said upper link to thereby control said hydraulic weight distribution system for raising and lowering said draft arms responsive to draft loads on said three-point hitch.
Claim 2
Dependent Claim
169 words
An electronic sensing system for use on a vehicle having a three-point hitch comprising, a pair of lower draft arms, and an upper link for connection to an implement, a bracket including a cantilever beam with mounting means supported on said vehicle, connecting means on said cantilever beam connected to said upper link, a strain gauge support portion on said cantilever beam intermediate said mounting means and said connecting means, a hydraulic weight distribution system on said vehicle having hydraulic means for raising and lowering said lower draft arms including a hydraulic valve having electrical operating means, an electronic control circuit including a strain gauge means and said electrical operating means for controlling said hydraulic valve in said hydraulic weight distribution system, said strain gauge means mounted on said strain gauge support portion of said bracket for sensing compressive and tensive forces from said upper link to thereby control said hydraulic weight distribution system for raising and lowering said draft arms responsive to draft loads on said three-point hitch.
Claim 3
Dependent Claim
51 words
An electronic sensing system for use on a vehicle having a three-point hitch as set forth in claim 1, a strain gauge positioned forwardly on said cantilever beam, a strain gauge positioned rearwardly on said cantilever beam for operating in compression and tension to sense draft loads on said three-point hitch.
Claim 4
Dependent Claim
55 words
A hydraulic sensing system for use on a vehicle having a three-point hitch as set forth in claim 1 wherein said electrical operating means of said hydraulic valvE includes, a solenoid having at least one coil connected in said electronic circuit to operate said hydraulic valve in response to draft loads on said three-point hitch.
Claim 5
Dependent Claim
65 words
An electronic sensing system for use on a vehicle having a three-point hitch as set forth in claim 1 wherein said bracket includes a base defining said mounting means for connection to the vehicle, two cantilever beams positioned on said base and connected to said upper link through said connecting means, means supporting said strain gauge means on at least one of said cantilever beams.
Claim 6
Dependent Claim
35 words
An electronic sensing system for use on a vehicle having a three-point hitch as set forth in claim 1 including means defining a recess means on said cantilever beam for receiving said strain gauge means.
Claim 7
Dependent Claim
47 words
An electronic sensing system for use on a vehicle having a three-point hitch as set forth in claim 1 wherein said bracket includes recessed means for receiving said strain gauge means, means for covering said recessed means thereby providing an enclosed compartment for said strain gauge means.
Claim 8
Dependent Claim
66 words
An electronic sensing system for use on a vehicle having a three-point hitch as set forth in claim 1 wherein said electronic circuit includes means sensing a change in voltage across said strain gauge means responsive to draft loads, electrical adjusting means for presetting a voltage for comparison with the voltage across said strain gauge means thereby providing a zero signal at a predetermined draft load.
Claim 9
Dependent Claim
58 words
An electronic sensing system for use on a vehicle having a three-point hitch as set forth in claim 1 wherein said strain gauge means include two strain gauges, said strain gauge support portion includes means for positioning one said strain gauge to operate in tension and one of said strain gauges to operate in compression and vice versa.
Claim 10
Dependent Claim
52 words
An electronic sensing system for use on a vehicle having a three-point hitch as set forth in claim 8 wherein said strain gauge means includes two strain gauges connected in series, means sensing the change in voltage at the junction of said strain gauges responsive to draft loads on said three-point hitch.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-22 | 1978-01-21 | 1978-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-22 | 1982-01-21 | 1982-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-22 | 1986-01-21 | 1986-07-23 | $7700.00 | Window Closed / Lapsed |