Control handle arrangement for power takeoff valve
First Claim
1. A control handle arrangement for selectively moving a reciprocable valve member of a self-centering valve, comprising:
- handle bracket means adapted for mounting in association with said valve member, said bracket means defining a guide slot;
control handle means adapted to be mounted in association with said bracket means and extend through said guide slot of said bracket means, said handle means being adapted for releasable operative connection with said valve member for selectively positioning said handle means in either of first and second positions with respect to said valve member and said bracket means, whereby movement of said handle means in a first direction within said guide slot of said bracket means moves said valve member from a first neutral position thereof to a second position thereof; and
selectively operable retaining means for retaining said handle in a position in which said valve member is maintained in said second position thereof, said retaining means comprising detent means defined by said bracket means in operative association with said guide slot, said retaining means being operable by movement of said handle means into said detent means when said handle means is operatively connected to said valve member in said first position of said handle means, said retaining means being inoperable whereby said handle means cannot be moved into said detent means when said handle means is operatively connected with said valve member in said second position of said handle means.
2 Assignments
0 Petitions
Accused Products
Abstract
A control arrangement is disclosed which is particularly suited for selective operation of a reciprocable member, such as the valve spool of a hydraulic power takeoff valve on a material handling implement. The arrangement includes a handle bracket which is adapted to be mounted in association with the hydraulic valve, and further includes a control handle adapted for releasable connection with the spool of the valve. The movement of the handle is guided by the handle bracket such that in a first position of the handle with respect to the valve spool, the handle can be positioned within a detent notch in the bracket for maintaining the valve spool out of its neutral position in opposition to its associated centering springs. The control handle can further be connected to the control member in a second position. In this second position, the handle is no longer receivable within the detent notch, thus requiring continued manipulation of the handle to maintain the valve spool out of its center, neutral position.
9 Citations
9 Claims
-
1. A control handle arrangement for selectively moving a reciprocable valve member of a self-centering valve, comprising:
-
handle bracket means adapted for mounting in association with said valve member, said bracket means defining a guide slot; control handle means adapted to be mounted in association with said bracket means and extend through said guide slot of said bracket means, said handle means being adapted for releasable operative connection with said valve member for selectively positioning said handle means in either of first and second positions with respect to said valve member and said bracket means, whereby movement of said handle means in a first direction within said guide slot of said bracket means moves said valve member from a first neutral position thereof to a second position thereof; and selectively operable retaining means for retaining said handle in a position in which said valve member is maintained in said second position thereof, said retaining means comprising detent means defined by said bracket means in operative association with said guide slot, said retaining means being operable by movement of said handle means into said detent means when said handle means is operatively connected to said valve member in said first position of said handle means, said retaining means being inoperable whereby said handle means cannot be moved into said detent means when said handle means is operatively connected with said valve member in said second position of said handle means. - View Dependent Claims (2, 3)
-
-
4. A control handle arrangement for selectively moving a reciprocable valve member, comprising:
-
handle bracket means adapted for mounting in association with said valve member; control handle means adapted to be mounted in association with said bracket means, said handle means being adapted for releasable operative connection with said valve member in first and second positions of said handle with respect to said valve member and said bracket means, whereby movement of said handle means in a first direction moves said valve member from a first neutral position thereof to a second position thereof; and selectively operable retaining means for retaining said handle in a position in which said valve member is maintained in said second position thereof, said retaining means being operable when said handle means is operatively connected to said valve member in said first position of said handle means, said retaining means being inoperable when said handle means is operatively connected with said valve member in said second position of said handle means, said handle means being movable in a second direction transverse to said first direction for operating said retaining means, said bracket means including a first wall portion defining a guide slot within which said handle means is movable in said first direction, said retaining means comprising detent means defined by said first wall portion in association with said guide slot; said retaining means further comprising a portion of said handle means of relatively reduced cross-section; said retaining means operating such that in said first position of said handle means, said reduced portion is receiveable within said detent means, while in said second position of said handle means said reduced portion is not receivable within said detent means. - View Dependent Claims (5, 6)
-
-
7. A control handle arrangement for selectively moving a reciprocable valve spool of a self-centering valve on an associated material handling implement, comprising:
-
a handle bracket adapted for mounting in association with said valve, and including a base portion through which said valve spool is adapted to extend, and further including spaced apart, first and second wall portions extending from said base portion on respective opposite sides of said valve spool; a control handle adapted to extend through said first and second wall portions and move within a guide slot defined by said first wall portion as said handle pivots with respect to said second wall portion; means for releasably pivotally connecting said control handle with said valve spool so that said valve spool is movable from a first neutral position to a second position as said handle is moved in said guide slot; and means for selectively retaining said control handle in a position wherein said valve spool is maintained in said second position thereof, said retaining means including a detent notch defined by said first wall portion of said handle bracket and opening into said guide slot, said retaining means further including a portion of said control handle of relatively reduced cross-section, whereby said reduced portion is receivable within said detent notch in a first position of said control handle with respect to said valve spool for maintaining said valve spool in said second position thereof, while in a second position of said handle with respect to said valve spool said reduced portion is not receivable within said detent notch. - View Dependent Claims (8, 9)
-
Specification