A tire pressure gauge for a bicycle is provided. The tire pressure gauge is fastened to an air valve and includes a connector assembly and a gauge assembly. The connector assembly includes a main body and an air-tight member. The main body includes a front member and a connecting member. The main body includes an opening portion, a first thread hole, and an accommodating channel, in which the opening portion and the first thread hole extend inwards, and the accommodating channel is disposed between the opening portion and the first thread hole. The gas-tight member is disposed in the accommodating channel by passing through the opening portion. When disposed in the accommodating channel, the air-tight member can be squeezed by the inner surface of the accommodating channel, and a gap exists between the air-tight member and the accommodating channel in the axial direction.

Embodiments of the disclosure relate to devices for controlling the pressure of bicycle tire. The devices generally include a casing configured to be housed inside a bicycle wheel and in which are arranged: a measurement unit comprising at least one sensor capable of measuring a pressure of the bicycle tire and producing a signal indicative of the value of the pressure, a transmission unit electrically connected to the measurement unit and capable of transmitting the signal to an external display, and a battery. The casing includes an opening passing through the casing, from an upper face to a lower face, the opening presenting at least one part flaring from its lower face towards the upper face, so as to define a slope adapted to fit a flared support, corresponding to a foot of the valve of the wheel.

A pressure sensing assembly configured to be attached to a bicycle wheel having a tire and a rim mounted to the tire. The pressure sensing assembly includes a housing, a pressure transmitting member, a sensing chamber defined by the housing and the pressure transmitting member, and a sensing element. The pressure transmitting member is coupled the housing and has a central portion offset from the plane in a first direction. The sensing element is offset from the plane in a second direction opposite the first direction. The pressure transmitting member is configured to transmit a pressure in the tire to the sensing element via the sensing chamber.

A pressure measuring device for a bicycle has a housing that includes a pressure chamber. The pressure chamber has a valve disposed in a first opening and a second opening into or out of a tire assembly volume of a tire assembly. A sense element is in pressure communication with the pressure chamber along a flow path between the first and second openings.

A tire pressure gauge for a bicycle is provided. The tire pressure gauge is fastened to an air valve and includes a connector assembly and a gauge assembly. The connector assembly includes a main body and an air-tight member. The main body includes a front member and a connecting member. The main body includes an opening portion, a first thread hole, and an accommodating channel, in which the opening portion and the first thread hole extend inwards, and the accommodating channel is disposed between the opening portion and the first thread hole. The gas-tight member is disposed in the accommodating channel by passing through the opening portion. When disposed in the accommodating channel, the air-tight member can be squeezed by the inner surface of the accommodating channel, and a gap exists between the air-tight member and the accommodating channel in the axial direction.

A vehicle includes a front wheel assembly and a rear wheel assembly having different outer diameters. A wheel position identifying device includes a reception circuit and processing circuitry. The reception circuit is configured to receive a first transmission signal and a second transmission signal. The first transmission signal is transmitted from a transmitter attached to the front wheel assembly at a specific rotational position of the front wheel assembly. The second transmission signal is transmitted from a transmitter attached to the rear wheel assembly at a specific rotational position of the rear wheel assembly. The processing circuitry is configured to determine whether each of the transmitters is attached to the front wheel assembly or the rear wheel assembly based on a reception interval of the first transmission signal and a reception interval of the second transmission signal.

A rim for a bicycle wheel includes a radially inner portion disposed along an inner circumference of the rim, a first sidewall, and a second sidewall spaced apart from the first sidewall. The first sidewall and the second sidewall extend radially outward from the radially inner portion. The rim also includes a radially outer tire engaging portion disposed along an outer circumference of the rim. The radially outer tire engaging portion extends from the first sidewall and the second sidewall, respectively. The rim also includes an opening through the radially inner portion at a first circumferential position along the inner circumference. An air valve of the bicycle wheel is positionable through the opening. The rim also includes a receptacle for a sensor device within the radially inner portion at a second circumferential position along the inner circumference. The second circumferential position is different than the first circumferential position.

A rotary union assembly for use with a tire inflation system includes a hollow tube configured to deliver air between proximal and distal ends, a bullet having a central axial aperture receiving the tube therethrough, a proximal retaining structure defined on the proximal end of the tube, and a distal retaining structure defined on a distal end of the tube, configured to retain the bullet on the tube therebetween. A cartridge is coupled to a distal end of the tube and includes one or more apertures on a sidewall thereof in fluid communication with the tube. In use, the rotary union assembly is coupled between a non-rotating axle of a vehicle and the rotating hubcap of a tire rotating about the axle and may be removed as a unit for repair and/or replacement of wear parts on the assembly.

Disclosed is a method for detecting an inclination, relative to the ground, of a wheel of a motor vehicle which includes: measuring two accelerations by using two accelerometers mounted on the wheel and suitable for measuring the acceleration of the wheel along a first axis and along a second axis, respectively, the first axis and the second axis being in the plane of the wheel and orthogonal, and calculating the components of a gravity vector in a reference frame formed by the first axis and the second axis from the measurements of acceleration, determining a modulus of the gravity vector from the calculated components, and determining a position of inclination of the wheel relative to the ground by comparing the value of the modulus of the gravity vector with a predetermined value.

The air-compressing device for a cycle has a crank set. The device includes at least one cartridge for storing compressed air, and a compressor, connected to the cartridge. The compressor includes a device for engaging with the crank set and a first and a second compression chamber, each chamber provided with an air piston. The device for engaging is connected to each piston and translatably drives the stroke of each piston so as to carry out compression in the respective chamber. The first chamber is connected to the second chamber so as to transfer the compressed air within the first chamber to the second chamber when compression is being carried out in the latter.