US4466504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tractor seat-operated hydraulic valve control
Assignee: Textron IPMP LP
•
Filing: 1983-02-03
•
Granted: 1984-08-21
•
Expires: 2003-02-03
Abstract
Abstract A tractor seat-operated hydraulic valve control including a power tractor and a hydraulically powered implement connected with the tractor. A hydraulic valve on the tractor is controlled by a manual lever connected therewith and by a mechanical connection between a pivotally mounted operator's seat and the valve. When the operator is off the seat the control moves the valve to the neutral position.
Inventors
- 👤 Frank J. Giandenoto
- 👤 Anthony J. Saiia
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:27
CPC Classifications
B; B60; B60K; B60K28/00; B60K28/02; B60K28/04
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
212 words
A tractor seat-operated hydraulic valve control, comprising a powered tractor, a hydraulically powered implement connected with said tractor, a hydraulic valve and a hydraulic motor operatively interconnected and operatively connected with said implement for powering said implement, said hydraulic valve having a neutral position where no fluid is passed to said hydraulic motor, a manual control mounted on said tractor and operatively connected with said hydraulic valve for controlling the flow of fluid through said valve and to said hydraulic motor, said manual control including a pivotally mounted member interconnected with said valve for operating said valve, including setting said valve in said neutral position, an uprightly disposed and vertically movable member having its lower end interconnected with said pivotally mounted member for positioning said pivotally mounted member in said neutral position, when said vertically movable member is in an upward position, a vertically movable operator's seat on said tractor, a spring on said tractor and operative on said seat for moving said seat to an upward position in the absence of the weight of the operator on said seat, and said vertically movable member being connected with said operator's seat and being movable to said upward position along with said seat for positioning said pivotally mounted member in said neutral position.
Claim 2
Dependent Claim
212 words
A tractor seat-operated hydraulic valve control, comprising a powered tractor, a hydraulically powered implement connected with said tractor, a hydraulic valve and a hydraulic motor operatively interconnected and operatively connected with said implement for powering said implement, said hydraulic valve having a neutral position where no fluid is passed to said hydraulic motor, a manual control mounted on said tractor and operatively connected with said hydraulic valve for controlling the flow of fluid through said valve and to said hydraulic motor, said manual control including a pivotally mounted member interconnected with said valve for operating said valve, including setting said valve in said neutral position, an uprightly disposed and vertically movable member having its lower end interconnected with said pivotally mounted member for positioning said pivotally mounted member in said neutral position, when said vertically movable member is in an upward position, a vertically movable operator's seat on said tractor, a spring on said tractor and operative on said seat for moving said seat to an upward position in the absence of the weight of the operator on said seat, and said vertically movable member being connected with said operator's seat and being movable to said upward position along with said seat for positioning said pivotally mounted member in said neutral position.
Claim 3
Dependent Claim
33 words
The tractor seat-operated hydraulic valve control as claimed in claim 1, wherein said vertically movable member includes a lost motion connection in the interconnection between said pivotally mounted member and said operator seat.
Claim 4
Dependent Claim
189 words
A tractor seat-operated hydraulic valve control, comprising a powered tractor, a hydraulically powered implement connected with said tractor, a hydraulic valve and a hydraulic motor operatively interconnected and operatively connected with said implement for powering said implement, said hydraulic valve having a neutral position where no fluid is passed to said hydraulic motor, a manual control mounted on said tractor and operatively connected with said hydraulic valve for controlling the flow of fluid through said valve and to said hydraulic motor, an over-ride control movably mounted on said tractor to one position and interconnected with said hydraulic valve for moving said hydraulic valve to said neutral position, a vertically movable operator's seat mounted on said tractor and connected with said over-ride control and being downwardly movable under the weight of an operator for actuating said over-ride control in a direction away from said one position, and a spring on said tractor and operatively related to said seat for moving said seat upwardly when said seat is not occupied by the operator and to thereby move said over-ride control to said one position for restricting operation of said hydraulic motor.
Claim 5
Dependent Claim
189 words
A tractor seat-operated hydraulic valve control, comprising a powered tractor, a hydraulically powered implement connected with said tractor, a hydraulic valve and a hydraulic motor operatively interconnected and operatively connected with said implement for powering said implement, said hydraulic valve having a neutral position where no fluid is passed to said hydraulic motor, a manual control mounted on said tractor and operatively connected with said hydraulic valve for controlling the flow of fluid through said valve and to said hydraulic motor, an over-ride control movably mounted on said tractor to one position and interconnected with said hydraulic valve for moving said hydraulic valve to said neutral position, a vertically movable operator's seat mounted on said tractor and connected with said over-ride control and being downwardly movable under the weight of an operator for actuating said over-ride control in a direction away from said one position, and a spring on said tractor and operatively related to said seat for moving said seat upwardly when said seat is not occupied by the operator and to thereby move said over-ride control to said one position for restricting operation of said hydraulic motor.
Claim 6
Dependent Claim
190 words
A tractor seat-operated hydraulic valve control, comprising a powered tractor, a hydraulically powered implement connected with said tractor, a hydraulic valve and a hydraulic motor operatively interconnected and operatively connected with said implement for powering said implement, said hydraulic valve having a neutral position where no fluid is passed to said hydraulic motor, said valve having an axially movable valve spool extending thereon, a manual control mounted on said tractor and including a pivotal member mounted for pivotal movement in the vertical plane and being pinned to said valve spool for axial displacement of said valve spool upon pivotal movement of said pivotal member, including setting said valve in said neutral position, a vertically mounted operator's seat on said tractor, a spring on said tractor and operative on said seat for moving said seat to an upward position in the absence of the weight of the operator on said seat, and means interconnected between said seat and said pivotal member and responsive to the vertical movement of said seat and being dimensioned to move and position said pivotal member in said neutral position in said upward position of said seat.
Claim 7
Dependent Claim
190 words
A tractor seat-operated hydraulic valve control, comprising a powered tractor, a hydraulically powered implement connected with said tractor, a hydraulic valve and a hydraulic motor operatively interconnected and operatively connected with said implement for powering said implement, said hydraulic valve having a neutral position where no fluid is passed to said hydraulic motor, said valve having an axially movable valve spool extending thereon, a manual control mounted on said tractor and including a pivotal member mounted for pivotal movement in the vertical plane and being pinned to said valve spool for axial displacement of said valve spool upon pivotal movement of said pivotal member, including setting said valve in said neutral position, a vertically mounted operator's seat on said tractor, a spring on said tractor and operative on said seat for moving said seat to an upward position in the absence of the weight of the operator on said seat, and means interconnected between said seat and said pivotal member and responsive to the vertical movement of said seat and being dimensioned to move and position said pivotal member in said neutral position in said upward position of said seat.
Claim 8
Dependent Claim
29 words
The tractor seat-operated hydraulic valve control as claimed in claim 4, wherein said means includes a lost motion connected in the interconnection between said seat and said pivotal member.
Claim 9
Dependent Claim
47 words
The tractor seat-operated hydraulic valve control as claimed in claim 5, wherein said valve neutral position is a central position for said valve spool, and said lost-motion connection has its lost-motion action disposed for movement of said spool in only one axial direction from said central position.
Claim 10
Dependent Claim
65 words
The tractor seat-operated hydraulic valve control as claimed in claim 4, wherein said manual control includes a bell crank pivotal on said tractor in a vertical plane and with one end of said bell crank being pinned with said valve spool, and said means being movable in the vertical plane and directly connected with said bell crank for limiting pivotal movement of said bell crank.
Claim 11
Dependent Claim
30 words
The tractor seat-operated hydraulic valve control as claimed in claim 4, wherein said means includes two bell cranks on separate axes and operable in vertical planes for multiple crank action.
Claim 12
Dependent Claim
51 words
The tractor seat-operated hydraulic valve control as claimed in claim 4, wherein said means includes a lost-motion connection arranged for positioning said pivotal member in said neutral position at one end of said lost-motion connection, and arranged for movement of said pivotal member in only one direction from said neutral position.
Claim 13
Dependent Claim
44 words
The tractor seat-operated hydraulic valve control as claimed in claim 4, including a switch mounted on said tractor and operated by said manual control and being connected with the power of said tractor for controlling same when said manual control is in one position.
References Cited (Backward Citations)
US710508A
Cited
US2612232A
Cited
US3229452A
Cited
US3334488A
Cited
US3590564A
Cited
US3736729A
Cited
US3918240A
Cited
US3969875A
Cited
US4178741A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-08-21 | 1988-02-20 | 1988-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-21 | 1992-02-20 | 1992-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-21 | 1996-02-20 | 1996-08-21 | $7700.00 | Window Closed / Lapsed |