Patent DE2700521C2 successfully refreshed from Google Patents.
US3731469A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Convertible gang lawn mower
Assignee: Jacobsen Manufacturing Co
•
Filing: 1972-01-24
•
Granted: 1973-05-08
•
Expires: 1992-01-24
Abstract
Abstract A convertible gang lawn mower having a supporting vehicle and a plurality of lawn mowers pivotally mounted on the vehicle to be raised and lowered thereon. A drive connection exists between a driving mower and a driven mower, and a limit connector is also attached between the mowers for limiting the relative motion therebetween. Storage supports are included in the machine for storing the drive connector and the limit connector when they are disconnected between the mowers so that only the driving mower is left in mowing position and the driven power is placed in the stored or transport position on the machine. Hydraulic lift cylinders are on the machine for lifting the mowers, and an additional crank-type lift is also on the machine for lifting one of the lowers when the hydraulic cylinders are not in use.
Inventors
- 👤 S Akgulian
- 👤 D Haffner
- 👤 S Heth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:10
CPC Classifications
A; A01; A01D; A01D34/00; A01D34/01; A01D34/02; A01D34/24; A01D34/246; A01D75/00; A01D75/30
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
186 words
In a gang lawn mowing machine, a supporting vehicle, a plurality of lawn mowers with movable cutters, pivot means between said vehicle and said mowers for articularly mounting said mowers on said vehicle for supporting said mowers thereon between a lowered mowing position and a raised transport position, said mowers including one driving mower and at least one drive mower powered through said driving mower, a drive connection between said driving mower and said driven mower for transmitting the drive between said cutters of the said two mowers, the improvement comprising disconnect means included in said drive connection and being physically separable from one of said mowers for interrupting the drive to said cutter of said driven mower, and storage means supported on said machine and being arranged to releasably fixedly receive said drive connection for storing said drive connection when the latter is separated from said one of said mowers, so that said driven mower can be in the raised transport position without having its said cutter being driven, and thereby convert said gang lawn mower to a fewer number of operating said lawn mowers.
Claim 2
Dependent Claim
186 words
In a gang lawn mowing machine, a supporting vehicle, a plurality of lawn mowers with movable cutters, pivot means between said vehicle and said mowers for articularly mounting said mowers on said vehicle for supporting said mowers thereon between a lowered mowing position and a raised transport position, said mowers including one driving mower and at least one drive mower powered through said driving mower, a drive connection between said driving mower and said driven mower for transmitting the drive between said cutters of the said two mowers, the improvement comprising disconnect means included in said drive connection and being physically separable from one of said mowers for interrupting the drive to said cutter of said driven mower, and storage means supported on said machine and being arranged to releasably fixedly receive said drive connection for storing said drive connection when the latter is separated from said one of said mowers, so that said driven mower can be in the raised transport position without having its said cutter being driven, and thereby convert said gang lawn mower to a fewer number of operating said lawn mowers.
Claim 3
Dependent Claim
50 words
The gang lawn mower as claimed in claim 1, wherein said drive connection is a splined telescoping shaft, and said disconnect means is a universal joint quick-disconnect device on the end of said shaft, and said storage means is a pin fitted to said quick-disconnect device for storing said shaft.
Claim 4
Dependent Claim
91 words
The gang lawn mower as claimed in claim 2, including a detachable connector extending between said driving and said driven mowers and being connected therebetween for limiting relative motion between the said two mowers to secure said splined telescoping shaft against separation of itself, and additional storage means supported on said machine for storing said connector when the latter is detached to permit relative movement between said two mowers so that said driven mower can be in the raised transport position while said driving mower is in the lowered mowing position.
Claim 5
Dependent Claim
33 words
The gang lawn mower as claimed in claim 3, including hydraulic cylinders mounted on said machine and being connected with each of said lawn mowers for raising and lowering of said lawn mowers.
Claim 6
Dependent Claim
74 words
The gang lawn mower as claimed in claim 4, wherein there are five of said mowers, and said hydraulic cylinders being arranged and connected to have two thereof extend and two thereof contract, upon lifting the four respective said mowers, and the four said cylinders having hydraulic connections therebetween for directing the fluid from said extending said two cylinders to the retracting said two cylinders, for optimum use of the fluid in the system.
Claim 7
Dependent Claim
26 words
The gang lawn mower as claimed in claim 3, including lifting means mounted on said machine and connected to said driving mower for raising the latter.
Claim 8
Dependent Claim
84 words
The gang lawn mower as claimed in claim 1, wherein said machine includes five said lawn moweRs, with three said lawn mowers being in one row extending across said machine and with the center one of said three being the driving mower and the outer two of said three being the driven mowers, said disconnect means being on each side of said driving mower and adjacent thereto, to permit terminating the drive to said cutters of both said driven mowers at said driving mower.
References Cited (Backward Citations)
US1944584A
Cited
US3007297A
Cited
US3058281A
Cited
US3106811A
Cited
US3583139A
Cited
US3613337A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-07 | 1976-11-06 | 1977-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-07 | 1980-11-06 | 1981-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-07 | 1984-11-06 | 1985-05-08 | $7700.00 | Window Closed / Lapsed |