A reciprocating pump comprises a cylinder, an inlet check valve, a piston, an outlet check valve and a purge circuit. The cylinder has a first end and a second end. The inlet check valve is disposed proximate a first end of the cylinder. The piston is disposed within the cylinder between the inlet check valve and the second end. The outlet check valve is disposed within the piston. The purge circuit extends across the inlet check valve and the outlet check valve to fluidly couple the first end and the second end.

A refillable reusable grease gun reservoir has grease inlet and outlet ports coupled with dry break fittings enabling the reservoir to be used and refilled. The reservoir may be filled through the top and/or bottom of the reservoir body.

A refillable reusable grease gun reservoir has grease inlet and outlet ports coupled with dry break fittings enabling the reservoir to be used and refilled. The reservoir may be filled through the top and/or bottom of the reservoir body.

Disclosed is a supply device (1) for supplying a consumer with a viscous medium, in particular a lubricant supply device (1), comprising at least a reservoir (6) for the viscous medium (8) comprising a follower piston (30) which comprises a ring seal (32) at its circumferential edges and is supported on the viscous medium and which separates the reservoir (6) into a space (36) supplied with a viscous medium and an air space (38), and a feed pump (10) for feeding the viscous medium from the reservoir (6) to a medium outlet (12), wherein further in the reservoir (6) at least one opening (60) is provided which serves to receive a ventilation apparatus (50) via which the reservoir (6) is in air-exchanging contact with the exterior surroundings; wherein the opening (60) is arranged in the reservoir (6) such that in a determined filling state of the reservoir (6) the ring seal (32) at least partially overrides the opening (60) so that the space supplied with a viscous medium is in fluidic connection with the opening (60).

A sensor transportation apparatus to convey an elongate sensor assembly through a wellbore, the sensor transportation apparatus comprises a pair of axles and a pair of wheels corresponding with the pair of axles with each wheel mounted on a respective said axle to rotate about an axis of rotation perpendicular to a longitudinal axis of the elongate sensor assembly. A protection structure extends longitudinally around each wheel to prevent a side of the wheel from contacting a wall of the wellbore. Each wheel extends above and below the protection structure to contact a side of the wellbore.

A sensor transportation apparatus to convey an elongate sensor assembly through a wellbore, the sensor transportation apparatus comprises a pair of axles and a pair of wheels corresponding with the pair of axles with each wheel mounted on a respective said axle to rotate about an axis of rotation perpendicular to a longitudinal axis of the elongate sensor assembly. A protection structure extends longitudinally around each wheel to prevent a side of the wheel from contacting a wall of the wellbore. Each wheel extends above and below the protection structure to contact a side of the wellbore.

A sensor transportation apparatus to convey a sensor assembly through a bore comprises at least one engagement structure to connect the sensor transportation apparatus to the sensor assembly, one or more wheels each arranged to rotate on a bearing about an axis of rotation substantially perpendicular to a longitudinal axis of the bore in use, and a lubrication system.

The lubrication system comprises a reservoir with an elastomer diaphragm, with an exterior side of the elastomer diaphragm subjected to an ambient bore pressure.

A conveyable medium, which may be gaseous, liquid, viscous, pasty, or pulverulent, is dispensed into an organism (human, animal, plant) or onto a technical system in a targeted, controlled, closed-loop controlled, and monitored manner by a displacement pumping principle using a gas produced by a gas generating cell. Conveyable media may be medicaments or active ingredients in a liquid, dissolved, or viscous form, as well as any type of supporting substance and liquid, and lubricants or protective agents (grease, oil) or reagents. The system includes the following parts: a) an operating, control, regulating, monitoring, and communication unit; b) a gas drive unit; c) an active ingredient reservoir; and d) a connection system.

A conveyable medium, which may be gaseous, liquid, viscous, pasty, or pulverulent, is dispensed into an organism (human, animal, plant) or onto a technical system in a targeted, controlled, closed-loop controlled, and monitored manner by a displacement pumping principle using a gas produced by a gas generating cell. Conveyable media may be medicaments or active ingredients in a liquid, dissolved, or viscous form, as well as any type of supporting substance and liquid, and lubricants or protective agents (grease, oil) or reagents. The system includes the following parts: a) an operating, control, regulating, monitoring, and communication unit; b) a gas drive unit; c) an active ingredient reservoir; and d) a connection system.

A device stand system for a portable electronic device includes a device holder assembly, an elongated stand assembly, and a base assembly. The base assembly includes an upper assembly fixedly coupled to the stand assembly and a lower assembly rotatably coupled to the upper assembly about an axis of rotation. The lower assembly includes retaining tabs, a central aperture, and a bearing assembly frictionally engaged with a coupling member having a circumferential flange, cylindrical portion, and apertured end face. In implementations a grooved channel and aligned apertures define a passageway. Other aspects are described in the claims, drawings, and text forming a part of the present disclosure.