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US 11,306,747 B2Granted
Servovalves
AssigneeHamilton Sundstrand Corporation
InventorsMaciej Bujewicz, Maciej Zak
Life of this patent
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Abstract
A single stage flapper type servovalve comprises a valve housing comprising a bore, a pair of opposed nozzles arranged in the bore and a flapper element arranged between the pair of nozzles. The valve housing further comprises a plurality of fluid ports for communicating a working fluid to and from the nozzles and in fluid communication with the housing bore. The valve housing and the nozzles are both made from a stainless steel material.
Claims6
A single stage flapper type servovalve comprising:
- a valve housing comprising a bore;
- a pair of opposed nozzles arranged in the bore;
- a flapper element arranged between the pair of nozzles;
- and
- a torque motor mounted to the valve housing;
- the valve housing further comprising a plurality of fluid ports for communicating a working fluid to and from the nozzles and in fluid communication with the housing bore;
- wherein the valve housing and the nozzles are both made from a stainless steel material;
- and
- the valve housing further comprising a stainless steel connecting tube between the valve housing and the torque motor, the flapper element extending through the connecting tube;
- wherein the connecting tube is received in a first groove in the valve housing and secured to the valve housing by a braze or weld and wherein the connecting tube is received in a second groove in a torque bridge of the torque motor and secured to the torque bridge by a braze or weld.
7 more elements
A single stage flapper type servovalve comprising:
- a valve housing comprising a bore;
- a pair of opposed nozzles arranged in the bore;
- and
- a flapper element arranged between the pair of nozzles;
- the valve housing further comprising a plurality of fluid ports for communicating a working fluid to and from the nozzles and in fluid communication with the housing bore;
- wherein the valve housing and the nozzles are both made from a stainless steel material;
- and
- wherein the valve housing further comprises a plurality of mounting bores at its periphery, for receiving fasteners for mounting the valve housing to a surface;
- wherein the mounting bores are formed as tubular elements attached to a central portion of the valve housing in which is formed the valve bore and/or the ports, by means of one or more connecting elements;
- and
- wherein the connecting elements further comprise a plurality of connecting arms that directly connect the mounting bores, wherein the connecting elements form a lattice structure with voids formed between the connecting arms and the central portion of the valve housing.
8 more elements
Dependencies are inferred from the claim text.