US3717983A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control apparatus for a harvesting machine
Assignee: Robert Bosch GmbH
•
Filing: 1971-11-01
•
Granted: 1973-02-27
•
Expires: 1991-11-01
Abstract
Abstract A control apparatus for lifting and lowering the mowing platform of a harvesting machine having a first housing for a control valve controlling the flow of pressure fluid from a pump into working conduits for the hydraulic lifting motor of the platform and a second housing attached to the first housing, and enveloping the cylinder of a pressure-responsive piston, a location-representing linkage connected with the nowing platform, and a regulator controlled by the pressure-responsive piston and by the location-representing linkage to operate the control valve by a part acting on a control valve slide portion of the control valve, projecting out of the first housing into the second housing. A manually operated lever controls the regulator to obtain a position of the mowing platform spaced from the ground.
Inventors
- 👤 W Reitz
- 👤 G Schwerin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:27
CPC Classifications
A; A01; A01D; A01D34/00; A01D34/01; A01D34/02; A01D34/24; A01D34/246; Y; Y10; Y10S; Y10S56/00; Y10S56/15
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
352 words
Control apparatus for the mowing means of a harvesting machine, comprising a hydraulic lifting motor; mowing means at least partly supported by said lifting motor and located on the ground; a first housing, and a second housing secured to said first housing adjacent the same; conduit means partly located in said first housing and connected with said lifting motor, and including a conduit in said second housing; control valve means located in said first housing for controlling the flow of fluid under pressure through said conduit means to said lifting motor, said control valve means including a control valve slide means having a portion projecting out of said first housing and into said second housing; a source of pressure fluid supplying pressure fluid to said control valve means; pressure-responsive means located in said second housing and including a pressure chamber connected by said conduit with said conduit means in said first housing for permitting said pressure-responsive means to sense the pressure in said lifting motor, said pressureresponsive means including a pressure cylinder, a pressureresponsive piston forming in said pressure cylinder said pressure chamber communicating with said conduit and conduit means, and pressure spring means urging said pressure-responsive piston into said pressure chamber and having a curved spring force characteristic, and means for adjusting said spring means; a regulating device in said second housing including a movable regulating means connected with said pressure-responsive means, location-representing means connecting said mowing means with the other end of said regulating means, and operating means connected with and controlled by said regulating means and engaging said projecting portion of said control valve means for operating the same, a load variation of said lifting motor due to ground conditions causing said pressure-responsive means and said location-representing means to place said regulating means in a regulating position controlling said operating means to operate said control valve means to control the flow of pressure fluid to said lifting motor to effect a pressure adjustment of said lifting motor compensating the load variation; and manually operated means connected with said regulating means for setting said regulating device to a desired position.
Claim 2
Dependent Claim
352 words
Control apparatus for the mowing means of a harvesting machine, comprising a hydraulic lifting motor; mowing means at least partly supported by said lifting motor and located on the ground; a first housing, and a second housing secured to said first housing adjacent the same; conduit means partly located in said first housing and connected with said lifting motor, and including a conduit in said second housing; control valve means located in said first housing for controlling the flow of fluid under pressure through said conduit means to said lifting motor, said control valve means including a control valve slide means having a portion projecting out of said first housing and into said second housing; a source of pressure fluid supplying pressure fluid to said control valve means; pressure-responsive means located in said second housing and including a pressure chamber connected by said conduit with said conduit means in said first housing for permitting said pressure-responsive means to sense the pressure in said lifting motor, said pressureresponsive means including a pressure cylinder, a pressureresponsive piston forming in said pressure cylinder said pressure chamber communicating with said conduit and conduit means, and pressure spring means urging said pressure-responsive piston into said pressure chamber and having a curved spring force characteristic, and means for adjusting said spring means; a regulating device in said second housing including a movable regulating means connected with said pressure-responsive means, location-representing means connecting said mowing means with the other end of said regulating means, and operating means connected with and controlled by said regulating means and engaging said projecting portion of said control valve means for operating the same, a load variation of said lifting motor due to ground conditions causing said pressure-responsive means and said location-representing means to place said regulating means in a regulating position controlling said operating means to operate said control valve means to control the flow of pressure fluid to said lifting motor to effect a pressure adjustment of said lifting motor compensating the load variation; and manually operated means connected with said regulating means for setting said regulating device to a desired position.
Claim 3
Dependent Claim
76 words
Control apparatus as claimed in claim 1, wherein said regulating means has one end pivotally connected with said pressure-responsive means, wherein said location-representing means include lever means pivotally connected with the other end of said regulating means, and wherein said regulating device includes an intermediate link pivotally connected at one end with said regulating means intermediate the ends thereof, and a connecting link pivotally connecting the other end of said intermediate link with said operating means;
Claim 4
Dependent Claim
47 words
Control apparatus as claimed in claim 2, wherein said regulating means, said lever means of said location-representing means, said intermediate link, said connecting link, and said operating means are pivotally connected to form a preassembled linkage which is mounted as an assembled unit in said second housing.
Claim 5
Dependent Claim
61 words
Control apparatus as claimed in claim 1, comprising threaded attaching means for securing said first and second housings to each other; wherein said first housing is formed with return conduit means controlled by said control valve means, said return conduit means including a chamber open one side of said first housing and being closed by a wall of said second housing.
Claim 6
Dependent Claim
101 words
Control apparatus as claimed in claim 1, wherein said means for adjusting include a disk supporting one end of said pressure spring means and being threaded into saiD second housing, and comprising a stop member surrounded by said spring means and having one end adjustably mounted on said disk and an other end cooperating with said pressure-responsive piston for stopping the same in an end position, said stop member having at said one end a portion projecting out of said second housing, and means for securing said projecting portion in an adjusted position of said stop member to said second housing.
Claim 7
Dependent Claim
103 words
Control apparatus as claimed in claim 1, wherein said regulating device includes a stop fixed to said second housing for stopping said location-representing means for operation of said regulating means by said pressure-responsive means while said location-representing means is ineffective; and wherein said pressure-responsive means includes another stop for stopping said pressure-responsive means in a position in which said regulating means is controlled only by said location-representing means; and wherein when said location-representing means and said pressure-responsive means engage said stops, respectively, at the same time, said mowing means is almost totally supported by said lifting motor and just slidingly touches the ground.
Claim 8
Dependent Claim
85 words
Control apparatus as claimed in claim 1, wherein said operating means has a camming edge and is mounted for turning movement under the control of said regulating means; and wherein said control valve means include a spring-biased control slide having an abutment projecting out of said first housing into said second housing and being engaged by said camming edge, the direction of movement of said control slide being in any position of said control slide and of said operating means perpendicular to said camming edge.
Claim 9
Dependent Claim
68 words
Control apparatus as claimed in claim 1, wherein said regulating means is turnable and has a forked end portion with curved faces; and wherein said pressure-responsive piston has first and second abutments forming an annular recess in which said forked end portion is located so that said regulating means is turned by said pressure-responsive piston means while said curved faces slide on said first and second abutments, respectively.
Claim 10
Dependent Claim
94 words
Control apparatus as claimed in claim 1, wherein said pressure-responsive means includes a fixed end member closing one end of said pressure cylinder, said fixed end member having a throttling passage connecting said pressure chamber with said conduit, said conduit being partly located in said second housing and partly in said first housing communicating through said conduit means with said lifting motor so that the pressure in said lifting motor influences the pressure in said pressure chamber acting on said pressure-responsive piston; and wherein said pressure-responsive piston is operatively connected with said regulating means.
Claim 11
Dependent Claim
169 words
Control apparatus as claimed in claim 1, wherein said regulating means is a regulating lever having one end connected with said pressure-responsive means, wherein said location-representing means includes a location-representing lever pivotally connected with the other end of said regulating lever, wherein said regulating device includes an intermediate link pivotally connected at one end with said regulating lever intermediate the end thereof, and a connecting link pivotally connected at one end with the other end of said intermediate link, a lever for representing a desired value, manually operated means for setting said value-representing lever, said connecting link having a guideway and said value-representing lever has a guiding projection guided in said guideway, a shaft secured to said value-representing lever, a setting member carried by said shaft and located in a bore of said second housing and having an end portion projecting out of said second housing, and an other end portion located in said second housing and formed with a guideway in which said value-representing lever is non-rotatably mounted.
Claim 12
Dependent Claim
80 words
Control apparatus as claimed in claim 10, wherein said bore and said setting meMber have conical surfaces in friction contact with each other, wherein said manually operated means includes a manual lever, and a hub means secured to said manual lever and mounted on said projecting end portion of said setting member, and a spring abutting at one end on said hub means and at the other end on an abutment on said projecting end portion of said setting member.
Claim 13
Dependent Claim
82 words
Control apparatus as claimed in claim 11, wherein said regulating device includes a bolt, another setting member surrounding said bolt and mounted in said second housing, threaded means securing said other setting member to said bolt and to said location-representing lever, said setting member having an end portion in said second housing formed with a guideway in which said location representing lever is non-rotatably located, and another end portion projecting out of said second housing and operatively connected with said mowing means.
Claim 14
Dependent Claim
70 words
Control apparatus as claimed in claim 12, wherein said other end portion of said other setting member has an annular recess; said regulating device comprising an adjusting member mounted on said second housing and engaging said annular recess, and at least one disk between said adjusting member and said second housing for adjusting the position of said adjusting member and of said other setting member relative to said second housing.
References Cited (Backward Citations)
US3568420A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-27 | 1976-08-28 | 1977-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-27 | 1980-08-28 | 1981-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-27 | 1984-08-28 | 1985-02-27 | $7700.00 | Window Closed / Lapsed |