A ball mount for measuring tongue weight of a trailer is disclosed. The ball mount can comprise a ball portion for interfacing with a ball configured to couple with a tongue of a trailer, a hitch portion for interfacing with a hitch receiver associated with a vehicle, and a load measurement device associated with the hitch portion. The hitch portion can be configured to pivot relative to the hitch receiver about a fulcrum in response to a downward force on the ball, with the hitch receiver resisting rotation of the hitch portion about the fulcrum thereby inducing a load on the hitch portion. The load measurement device can be configured to determine a magnitude of the downward force on the ball based on the load on the hitch portion.

A Device for measuring a force applied by a fitting apparatus provided with a threaded rod having an external or internal thread, includes a hydraulic chamber containing a fluid; a piston configured to slide inside the hydraulic chamber; a threaded connector fixed to the piston, the threaded connector having a thread configured in such a way that the threaded rod screws onto the threaded connector, so that the threaded rod can impose an axial force on the piston resulting in travel of the piston in the hydraulic chamber; and a pressure gauge communicating with the hydraulic chamber, configured to measure a pressure inside the hydraulic chamber created by the axial force applied on the piston by the threaded rod.

Embodiments of a valve assembly and a plumbing system incorporating the same are provided herein. In some embodiments, a valve assembly for use with an enclosed environment includes a housing having an interior volume, an inlet disposed at a first end of the housing and fluidly coupled to an environment surrounding the housing, and an outlet disposed at a second end of the housing opposite the first end and fluidly coupled to the enclosed environment; a first valve having a first valve seat and a first sealing member at least partially extending through a first opening in the first valve seat in a closed position; and a second valve disposed beneath the first valve and having a second valve seat and a second sealing member at least partially extending through a second opening in the second valve seat in a closed position.

A pressure gauge includes a base, a dial, an indicator, and an actuating device. The base defines a channel. The dial has graduations in a first region for low pressures, graduations in a second region for high pressures, and a middle graduation located between the first and second regions. The graduations in the first region are spaced at a first distance. The graduations in the second region are spaced at a second distance different from the first distance. The actuating device includes a pressure responding device and a plunger held in the channel. The plunger is abutted by the pressure responding device. The pressure responding device includes a first and second resilient member having a different modulus of elasticity and arranged in series. The shaft is rotated in response to movement of the plunger.

A method for the visual inspection of the existence of pressure within a branch line of pipes includes locating the run of pipes, coupling a mechanical tee to a first pipe so as to form a branch in the run of pipes wherein the mechanical tee has a pressure indicator, pressurizing the run of pipes, and checking the pressure indicator for an indication of pressure within the run of pipes. The mechanical tee includes a collar portion configured to extend around a pipe. A neck portion is coupled to the collar portion. The channel of the neck portion is in fluid communication with the interior of the pipe. A pressure indicating device is in fluid communication with the channel to provide a visual indication of the pressure level. The pressure indicating device may include electrical contacts to communicate with a monitoring system.

A valve actuator is described that comprises a piston movable within a cylinder, an indicator pin support member movable with the piston, and an indicator pin attached to the support member and extending through an opening provided in a housing, wherein the indicator pin includes an attachment region held captive to the support member, the attachment region extending through an arcuate slot formed in the support member. Also described is a valve incorporating such an actuator.

A pressure gauge and/or relief valve which may be used in a single-use fluid system, such as a sterilizable fluid system. The pressure gauge and/or pressure relief valve may be configured to measure and to relieve fluid within a fluid-containing structure, the pressure gauge relief valve including a housing having a first end, a second end, and an inner surface defining a passage between the first end and the second end, a movable element movable within the passage, wherein the housing first end is configured to be coupled with a fluid-containing structure, the housing second end is spaced from the housing first end; and the movable element is movable with respect to the housing to indicate pressure therein and to allow fluid to pass between the movable element and the inner surface of the passage at a selected pressure.

A height adjustable hitch receiver is disclosed and described.

An air inflation device includes an inflation unit defining an interior space, a handgrip unit connected to the inflation unit, and a pressure measuring mechanism disposed in the handgrip unit and including a first tubular member defining a receiving space, and a second tubular member defining a flow guide channel that has an air inlet communicating with the interior space, and an air guide hole communicating with the receiving space. A measuring unit is disposed in the receiving space and has a free end pushed to move relative to the first tubular member by air entering the receiving space from the flow guide channel. An indicating unit indicates a position of the free end in the first tubular member.

A differential pressure gauge for measuring a difference in pressure present between a low pressure portion of a fluid and a high pressure portion of the fluid includes a cylinder and a housing. The cylinder includes an opening. The housing includes an opening. A piston extends from a first end having a visual indicator to a second end having a remote indicator. The first end of the piston is in fluid communication with the high pressure portion of the fluid and the second end of the piston is in fluid communication with the low pressure portion of the fluid. A sensor is configured to sense a presence of the remote indicator when the remote indicator is within a sensing range of the sensor. The sensor is coupled to a sensor positioning mechanism for adjusting a position of the sensor with respect to the axial direction of the housing.