Portable tester for hydraulic power circuits

Claim 2

A hydraulic circuit tester comprising a housing provided with a mounting surface at one end and with a pair of bores extending inwardly beside each other from said surface to provide at said end an inlet port and an outlet port to register with side-byside outlet and inlet ports in a fluid line, the inner end portions of the two bores communicating with each other, a valve member in the bore with said outlet port for throttling fluid flow therethrough, means for adjusting said valve member in said bore, electric signal emitting means associated with the other bore and responsive to fluid flowing through the housing, and means for electrically connecting said signal emitting means to means for indicating the flow rate of said fluid.

Claim 3

A hydraulic circuit tester according to claim 1, in which said bores are substantially parallel, the housing including a transverse passage connecting the inner end portions of the two bores.

Claim 4

A hydraulic circuit tester according to claim 1, in which said signal emitting means include a turbine rotor for rotation by the fluid, and means responsive to the rotation of said rotor connected with said connecting means, the tester also including an electrical pressure sensor mounted in the wall of said housing and engageable by fluid flowing through the housing between its inlet port and said valve member.

Claim 5

A hydraulic circuit tester according to claim 1, in which said signal emitting means include a turbine rotor for rotation by the fluid, and means responsive to the rotation of said rotor connected with said connecting means, the tester also including a temperature sensor at the upstream side of said valve member in a position to be surrounded by fluid flowing through said housing.

Claim 6

In a hydraulic circuit, a connector having a passage therethrough provided with an inlet and an outlet permanently connected in the circuit for flow of fluid through the connector, the connector having a base and a cap detachably mounted thereon, said inlet and outlet being in said base, portions of said passage extending from said inlet and outlet into the base and up to its top to form two intermediate ports in the top of the base, the remaining portion of the passage being disposed in said cap and connecting said ports, a testing housing provided with a pair of bores extending inwardly from one end thereof with their inner end portions communicating with each other, means for mounting said end of the housing on said base when said cap is removed, with the open ends of said bores registering with said ports, a valve member in the bore connected with saiD outlet for throttling fluid flow therethrough, means for adjusting said valve member, electric signal emitting means associated with the other bore and responsive to predetermined fluid conditions in said housing, and means responsive to said signal emitting means for indicating said fluid conditions in said housing.

Claim 7

In a hydraulic circuit, a connector having a passage therethrough provided with an inlet and an outlet permanently connected in the circuit for flow of fluid through the connector, the connector having a base and a cap detachably mounted thereon, said inlet and outlet being in said base, portions of said passage extending from said inlet and outlet into the base and up to its top to form two intermediate ports in the top of the base, the remaining portion of the passage being disposed in said cap and connecting said ports, a testing housing provided with a pair of bores extending inwardly from one end thereof with their inner end portions communicating with each other, means for mounting said end of the housing on said base when said cap is removed, with the open ends of said bores registering with said ports, a valve member in the bore connected with saiD outlet for throttling fluid flow therethrough, means for adjusting said valve member, electric signal emitting means associated with the other bore and responsive to predetermined fluid conditions in said housing, and means responsive to said signal emitting means for indicating said fluid conditions in said housing.

Claim 8

In a hydraulic circuit as defined in claim 5, said signal emitting means including an electrical pressure transducer exposed to fluid pressure in said housing at the upstream side of said valve, and a temperature sensor responsive to the temperature of fluid flowing through said housing.

Claim 9

In a hydraulic circuit as defined in claim 5, said signal emitting means including a turbine rotor mounted in said other bore for rotation by fluid flowing through the housing, a magnet rotatable by the turbine, and means responsive to the rotation of the magnet for emitting said signal.