Abstract: An in-situ pressure sensor bias determination apparatus (300) comprises a measurement pressure sensor (400), a reference pressure sensor (402), an electronically controllable pressure adjustment device (406), and a fluid conduit network (410) having an ambient access port (412). The measurement pressure sensor (400) has a greater operating pressure range than the reference pressure sensor (402). The measurement pressure sensor (400), the reference pressure sensor (402) and the pressure adjustment device (406) are sealingly coupled to the fluid conduit network (410) so as to define a volume that is open only at the ambient access port (412). An ambient isolation device (420) is arranged to isolate selectively the ambient access port (412) from the measurement pressure sensor (400), the reference pressure sensor (402) and the pressure adjustment device (406), thereby closing the open volume.

Abstract: Devices for mounting firearms to dashboards and motorcycle handlebars, making them readily available to drivers, are provided. A magnetic firearm dash mount kit includes a cup ring, a ring, a round cap, and a fastener. The cup ring houses the ring magnet, which in turn surrounds the round cap. The fastener is inserted through a fastener hole of the case and a corresponding hole in the vehicle dash panel to secure the magnetic firearm mount to the vehicle dash panel. A magnetic firearm mount assembly for a motorcycle comprises a magnetic firearm mount, a clamp, and optionally a barrel mount. The magnet is strong enough to stably secure a variety of handheld pistols to the mount under bumpy driving conditions. The clamp is linked to the mount and is stably and releasably mount about a motorcycle handlebar. The barrel mount fits in the firearm barrel to further secure the firearm.

Abstract: A variable flow external rotor hydraulic machine (10, 10?) has an inlet (26, 26?) an outlet (28, 28?), a rotor set having a first rotor (58, 58?) mounted for rotation about a first rotor axis and a second rotor (68, 68?) mounted for rotation about a second rotor axis, the machine being configured as either a pump or a motor, in which at least one of the first and second rotor axes is movable relative to the other to vary a leakage flow between the rotors.

Abstract: A serving tray (10) comprising a substantially planar tray (12) having a top surface (12a), and a bottom surface (12b) with a removable elongate handle (14) extending from the bottom surface of the tray. The tray (12) includes a handle coupling that is accessible via an opening in the vicinity of the bottom surface of the tray for receiving a complimentary engagement member of the handle (14) in a slidably releasable friction-fit hold.