Hydraulic directional valve for servocontrols of aircraft in particular helicopters
First Claim
1. Hydraulic directional valve for in particular servocontrols of helicopters and aircraft, said directional valve comprising in combination:
- a body, a fixed sleeve disposed in said body, a closing element rotatively mounted in said fixed sleeve, an annular element interposed between said closing element and said sleeve, ports provided radially in said sleeve and in said annular element in the extension of one another for the inlet of a hydraulic fluid under pressure and the outlet of said hydraulic fluid to a tank, passages provided on the periphery of said annular element to permit a circulation of said fluid from one of said ports to the other in the event of a seizing of said closing element in said annular element, means for locking said annular element against rotation in normal use and for permitting a driving of said annular element in rotation by means of said closing element in the event of a seizing of said closing element in said annular element, said means for locking said annular element in rotation in normal use comprising a device including a push member which is mounted laterally on said body adjacent one end of said closing element and extends in a direction perpendicular to said closing element, a rocker mounted inside said body, recesses provided in an end of said annular element, and locking balls inserted in and projecting from said recesses, resilient means for biasing said push member against said rocker, said resilient means exerting a thrust which is applied on said locking balls through the medium of said rocker.
2 Assignments
0 Petitions
Accused Products
Abstract
This directional valve comprises a closing element (1) rotatively mounted in a fixed sleeve (5) disposed in a body (2) with interposition of an annular element (4) between the closing element and the sleeve. Means are provided for locking the annular element against rotation in normal use and for permitting the driving of the annular element by the closing element in the event of a seizing of the closing element in the annular element. These locking means comprise a device (12) having a push member (13) mounted laterally on the body at one end of the closing element (1) and extending in a direction perpendicular to the closing element (1), resilient means (15) being provided for biasing the push member against a rocker (30) inside the body, the thrust of which is applied to locking balls (21) which project from recesses (24) provided in an end of the annular element (4).
13 Citations
8 Claims
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1. Hydraulic directional valve for in particular servocontrols of helicopters and aircraft, said directional valve comprising in combination:
- a body, a fixed sleeve disposed in said body, a closing element rotatively mounted in said fixed sleeve, an annular element interposed between said closing element and said sleeve, ports provided radially in said sleeve and in said annular element in the extension of one another for the inlet of a hydraulic fluid under pressure and the outlet of said hydraulic fluid to a tank, passages provided on the periphery of said annular element to permit a circulation of said fluid from one of said ports to the other in the event of a seizing of said closing element in said annular element, means for locking said annular element against rotation in normal use and for permitting a driving of said annular element in rotation by means of said closing element in the event of a seizing of said closing element in said annular element, said means for locking said annular element in rotation in normal use comprising a device including a push member which is mounted laterally on said body adjacent one end of said closing element and extends in a direction perpendicular to said closing element, a rocker mounted inside said body, recesses provided in an end of said annular element, and locking balls inserted in and projecting from said recesses, resilient means for biasing said push member against said rocker, said resilient means exerting a thrust which is applied on said locking balls through the medium of said rocker.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
Specification