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Patent US4306402A successfully refreshed from Google Patents.
US4306402A
Expired / Lapsed
US
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Gang mowers
Assignee: AHIWHIMPWAY Ltd MANUFACTURERS A COMPANY OF NEW ZEALAND
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Filing: 1980-06-09
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Granted: 1981-12-22
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Expires: 2000-06-09
Abstract
Abstract A gang mower comprises a number of individual reel mowers ganged together, each reel being driven by an electric motor from an electric power source, such as an alternator, associated with the mower. The alternator is typically driven by the same motor that propels the gang mower along.
Inventors
- 👤 Raymond G. Whimp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:57
CPC Classifications
A; A01; A01D; A01D75/00; A01D75/30; A01D34/00; A01D34/01; A01D34/412; A01D34/42; A01D34/56; A01D34/58; A01D69/00; A01D69/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
178 words
A gang mower suitable for being propelled along the ground by an engine driven vehicle, including: (a) a frame connectable to move with said vehicle; (b) an alternator assembly securable to said vehicle, said alternator being couplable with said engine of said vehicle, whereby said engine speed and alternator output voltage vary together; (c) a plurality of cutting reel assemblies attached to said frame said cutting reel assemblies experiencing a load which varies with respect to the ground speed of said vehicle; (d) each of said cutting reel assemblies including a cutting reel mounted between and supported by a pair of wheels; (e) a single electric motor mounted on each cutting reel assembly in driving engagement with the corresponding cutting reel; and (f) power supply cables connected to each of said electric motors from said alternator to supply electrical power generated by said alternator assembly whereby when said engine speed decreases, decreasing said vehicle ground speed and the voltage from said alternator, the load applied to said cutting assembly decreases to correspondingly lower voltage requirements for said motor.
Claim 2
Dependent Claim
178 words
A gang mower suitable for being propelled along the ground by an engine driven vehicle, including: (a) a frame connectable to move with said vehicle; (b) an alternator assembly securable to said vehicle, said alternator being couplable with said engine of said vehicle, whereby said engine speed and alternator output voltage vary together; (c) a plurality of cutting reel assemblies attached to said frame said cutting reel assemblies experiencing a load which varies with respect to the ground speed of said vehicle; (d) each of said cutting reel assemblies including a cutting reel mounted between and supported by a pair of wheels; (e) a single electric motor mounted on each cutting reel assembly in driving engagement with the corresponding cutting reel; and (f) power supply cables connected to each of said electric motors from said alternator to supply electrical power generated by said alternator assembly whereby when said engine speed decreases, decreasing said vehicle ground speed and the voltage from said alternator, the load applied to said cutting assembly decreases to correspondingly lower voltage requirements for said motor.
Claim 3
Dependent Claim
24 words
The gang mower as claimed in claim 1 wherein said alternator assembly is a three-phase alternator and each electric motor is a three-phase motor.
Claim 4
Dependent Claim
37 words
The gang mower as claimed in claim 1 wherein the gang mower frame is towed by said vehicle and the electric alternator assembly is driven from the crank shaft or a power take-off of the towing vehicle.
Claim 5
Dependent Claim
30 words
The gang mower as claimed in claim 1 wherein the gang mower is of the self-propelled type and the electric alternator is driven by the propelling means of the mower.
Claim 6
Dependent Claim
16 words
The gang mower as claimed in claim 1 wherein each reel is drivable from either end.
Claim 7
Dependent Claim
29 words
The gange mower as claimed in claim 1 including a hydraulically retractable arm pivoted to said frame, said cutting reel assemblies of said mower being mounted on said arm.
Claim 8
Dependent Claim
24 words
The gang mower as claimed in claim 1 wherein each cutting wheel assembly is pivotally mounted behind a jockey wheel attached to said frame.
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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) | 1984-12-21 | 1985-06-22 | 1985-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-21 | 1989-06-22 | 1989-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-21 | 1993-06-22 | 1993-12-22 | $7700.00 | Window Closed / Lapsed |