Pressure variable valve apparatus and set pressure detecting apparatus of the valve apparatus
AssigneeSeiko Instruments Inc.
InventorTakashi Ito
Life of this patent
Estimating the term…
Abstract
A pressure variable valve apparatus includes a mover constituted to be embedded in the body and movable linearly in B direction in a main body to change pressure for releasing closure of a valve flow path by a valve element, a fixed magnetic marker provided unmovably to the main body and a variable magnetic marker integrally formed with the mover. Meanwhile, a set pressure detecting apparatus includes a magnetic sensor and a supporter for supporting from outside of the body the magnetic sensor scannably in direction for moving the variable magnetic marker to provide detected output in accordance with positions of the fixed magnetic marker and the movable magnetic marker of the valve apparatus from the magnetic sensor.
Claims20
A pressure variable valve apparatus which is configured to be embedded in a living body and having a variable set pressure, the pressure variable valve apparatus comprising:
- a housing defining a fluid flow path;
- a valve element disposed in the housing for releasably closing the fluid flow path;
- a movable member linearly movable in the housing to change a pressure in the fluid flow path by varying the closure of the fluid flow path by the valve element;
- a fixed magnetic marker mounted stationary to the housing;
- and
- a movable magnetic marker integrally formed with the movable member.
A variable pressure valve apparatus comprising:
- a housing defining a fluid conduit having a fluid inlet port and a fluid discharge port;
- a valve element for releasably closing one of the fluid inlet and outlet ports;
- an elongate spring member disposed in the housing for biasing the valve element in a closing direction to control a flow pressure of a fluid;
- a movable member linearly slidable relative to the elongate spring member and in contact therewith for controlling a biasing force of the spring member on the valve element;
- and a driving mechanism for driving the movable member to slide relative to the elongate spring member to control the fluid pressure.
A pressure variable valve apparatus which is configured to be embedded in a living body and having a variable set pressure, the pressure variable valve apparatus comprising:
- a housing defining a fluid flow path;
- a valve element disposed in the housing for releasably closing the fluid flow path;
- a rotary type step motor element disposed in the housing and having a rotor comprising a multiple pole permanent magnet structure, a rotational position of the rotor being adjustable to change a pressure of the fluid by varying the closure of the fluid flow path by the valve element;
- and
- a fixed magnetic marker integrally formed with the rotor.
Dependencies are inferred from the claim text.