Abstract: A pressure relief valve includes a valve body including a monitored pressure inlet leading to a monitored pressure region, a piston having a shear seal bore and a surface facing the monitored pressure region, a vent passage and a the shear seal assembly comprising a seal plate having a sealing surface thereon, and the shear seal assembly includes a sealing surface facing the seal plate and having a first annular area, and a first surface having an annular surface area at least twice as large as the first area of the sealing surface, the first surface facing away from the first area, and a biasing seal in contact with the first surface.

Abstract: A pressure relief valve includes a valve body including a monitored pressure inlet leading to a monitored pressure region, a piston having a shear seal bore and a surface facing the monitored pressure region, a vent passage and a the shear seal assembly comprising a seal plate having a sealing surface thereon, and the shear seal assembly includes a sealing surface facing the seal plate and having a first annular area, and a first surface having an annular surface area at least twice as large as the first area of the sealing surface, the first surface facing away from the first area, and a biasing seal in contact with the first surface.

Abstract: A pressure relief valve includes a valve body including a monitored pressure inlet leading to a monitored pressure region, a piston having a shear seal bore and a surface facing the monitored pressure region, a vent passage and a the shear seal assembly comprising a seal plate having a sealing surface thereon, and the shear seal assembly includes a sealing surface facing the seal plate and having a first annular area, and a first surface having an annular surface area at least twice as large as the first area of the sealing surface, the first surface facing away from the first area, and a biasing seal in contact with the first surface.

Abstract: A scarifier system for cutting channels into a ground surface according to a chosen design pattern, comprising a scarifier machine, and a guide system for guiding the scarifier machine on a tracked trail. The guide system for guiding the scarifier machine on a tracked trail can be, for instance, a sliding bracket clasping a guide rail or a rolling carriage having one or more pairs of wheels gripping a guide rail. A method of remodeling a ground surface using the scarifier system comprises the steps of planning a design pattern to remodel the ground surface and to mark the ground surface according to the chosen design pattern. The guide rail is installed on the ground surface according to the chosen design pattern and the scarifier machine is placed on the guide rail in a manner that the scarifier machine can slide along the guide rail to cut a channel into the ground surface.

Abstract: A method includes providing information to a user about available guided exercise routines. The method further includes receiving from the user a selection of one of the available guided exercise routines. The method further includes providing digital and audio content comprising the selected guided exercise routine to the user. The method further includes receiving motion data from a at least one motion sensor worn by the user while performing exercises associated with the selected guided exercise routine. The method further includes identifying repetitions of an exercise being performed by the user. The method further includes calculating a performance score based on the motion data received from the motion sensor using a neural network trained using feedback provided by one or more expert reviewers based on review of video of one or more training users performing the exercise. The method further includes displaying the performance score on the display unit.

Abstract: A pressure relief valve includes a valve body including a monitored pressure inlet leading to a monitored pressure region, a piston having a shear seal bore and a surface facing the monitored pressure region, a vent passage and a the shear seal assembly comprising a seal plate having a sealing surface thereon, and the shear seal assembly includes a sealing surface facing the seal plate and having a first annular area, and a first surface having an annular surface area at least twice as large as the first area of the sealing surface, the first surface facing away from the first area, and a biasing seal in contact with the first surface.

Abstract: A scarifier system for cutting channels into a ground surface according to a chosen design pattern, comprising a scarifier machine, and a guide system for guiding the scarifier machine on a tracked trail. The guide system for guiding the scarifier machine on a tracked trail can be, for instance, a sliding bracket clasping a guide rail or a rolling carriage having one or more pairs of wheels gripping a guide rail. A method of remodeling a ground surface using the scarifier system comprises the steps of planning a design pattern to remodel the ground surface and to mark the ground surface according to the chosen design pattern. The guide rail is installed on the ground surface according to the chosen design pattern and the scarifier machine is placed on the guide rail in a manner that the scarifier machine can slide along the guide rail to cut a channel into the ground surface.

Abstract: A pressure relief valve includes a valve body including a monitored pressure inlet leading to a monitored pressure region, a piston having a shear seal bore and a surface facing the monitored pressure region, a vent passage and a the shear seal assembly comprising a seal plate having a sealing surface thereon, and the shear seal assembly includes a sealing surface facing the seal plate and having a first annular area, and a first surface having an annular surface area at least twice as large as the first area of the sealing surface, the first surface facing away from the first area, and a biasing seal in contact with the first surface.

Abstract: A pressure regulator includes a regulated fluid volume, at least one vent passage and fluid supply passage, a dampening piston bore and a regulated fluid volume outlet passage, a regulated fluid pressure piston having a first surface side exposed to the regulated fluid volume, and a second surface side exposed outwardly of the body, an external biasing member contactable with the piston and providing a force on the piston inwardly of the body, a gate connected to the piston, a dampening piston disposed in the dampening piston bore, the dampening piston disposed between a dampening and regulated fluid volumes and including a recess including a band therein having at least one gap therethrough, the gap in the band forming a passage between the dampening piston and the piston bore communicable with a volume exterior to the region between the dampening piston and the piston bore.

Abstract: A pressure regulator includes a body including a regulated fluid volume, at least one vent passage and fluid supply passage, a dampening piston bore and one regulated fluid volume outlet passage, a regulated fluid pressure piston, the regulated fluid pressure piston having a first side exposed to the regulated fluid volume, and a second surface exposed outwardly of the body, an external biasing member contactable with the second surface of the piston and providing a force on the piston directed inwardly of the body, a gate connected to the piston and having a first seal and a second seal, a dampening piston disposed in the dampening piston bore, the dampening piston disposed between a dampening volume and the regulated fluid volume, the dampening piston including a bore extending therethrough and communicable between the regulated fluid volume and the dampening volume, the bore including an orifice position therein, and, an opening extending from the dampening volume outwardly the body, the opening sealable b

Abstract: A pressure regulator includes a regulated fluid volume, at least one vent passage and fluid supply passage, a dampening piston bore and a regulated fluid volume outlet passage, a regulated fluid pressure piston having a first surface side exposed to the regulated fluid volume, and a second surface side exposed outwardly of the body, an external biasing member contactable with the piston and providing a force on the piston inwardly of the body, a gate connected to the piston, a dampening piston disposed in the dampening piston bore, the dampening piston disposed between a dampening and regulated fluid volumes and including a recess including a band therein having at least one gap therethrough, the gap in the band forming a passage between the dampening piston and the piston bore communicable with a volume exterior to the region between the dampening piston and the piston bore.

Abstract: A pressure regulator includes a body including a regulated fluid volume, at least one vent passage and fluid supply passage, a dampening piston bore and one regulated fluid volume outlet passage, a regulated fluid pressure piston, the regulated fluid pressure piston having a first side exposed to the regulated fluid volume, and a second surface exposed outwardly of the body, an external biasing member contactable with the second surface of the piston and providing a force on the piston directed inwardly of the body, a gate connected to the piston and having a first seal and a second seal, a dampening piston disposed in the dampening piston bore, the dampening piston disposed between a dampening volume and the regulated fluid volume, the dampening piston including a bore extending therethrough and communicable between the regulated fluid volume and the dampening volume, the bore including an orifice position therein, and, an opening extending from the dampening volume outwardly the body, the opening sealable b

Abstract: A shuttle valve having a cage fixed in the cross bore thereof by opposed inlet adaptors extending into opposed first and second inlets is provided. A shuttle is reciprocally located in a bore in the cage, to selectively seal one of the first or second inlets from fluid communication with the valve outlet. The shuttle may be spring biased to maintain one of the inlets in the closed position without the need to apply a pressure into an inlet of the valve.

Abstract: The invention provides devices and methods for remanufacturing toner printer cartridges and their components by reusing a seal for the toner opening port. The invention also provides devices and methods for remanufacturing a printer cartridge by resealing the toner opening port of the toner hopper. The invention also relates to devices and methods to install and replace seals on a toner hopper, refill toner in a toner hopper, replace a bag of toner in a toner hopper, and replace a chip for a toner cartridge. Also included are devices and methods of sealing a toner cartridge and reattaching a toner cartridge end cap to a waste hopper. A soft shell bottle suitable for use in a toner cartridge composed of a soft polymeric material is also provided.

Abstract: A shuttle valve having a cage fixed in the cross bore thereof by opposed inlet adaptors extending into opposed first and second inlets is provided. A shuttle is reciprocally located in a bore in the cage, to selectively seal one of the first or second inlets from fluid communication with the valve outlet. The shuttle may be spring biased to maintain one of the inlets in the closed position without the need to apply a pressure into an inlet of the valve.

Abstract: A method and apparatus for driving a wire conveyor belt with a buildup shedding sprocket. When driving a belt in any application in which material is added to articles on the belt, excess material accumulates on the support shelves between the sprocket teeth. A relief cut is made between the sprocket teeth providing a channel through which the excess material can be pushed away.

Abstract: A method and apparatus for driving a wire conveyor belt with a buildup shedding sprocket. When driving a belt in any application in which material is added to articles on the belt, excess material accumulates on the support shelves between the sprocket teeth. A relief cut is made between the sprocket teeth providing a channel through which the excess material can be pushed away.

Abstract: A washing machine having a simple, leak-tight drain line that can be easily assembled on the wash tub of the washing machine is disclosed. The washing machine includes a valve part that is connected to the wash tub in a sealed fashion and designed in one piece together with the wash tub. The valve part has a drain valve, an outlet connection having a drain opening, and a pipe part connected to the outlet connection and to a drain pump for water transfer. The drain valve can float in the wash water and is moveably disposed inside the valve part to seal the drain opening when wash water is located inside the wash tub and when the drain pump is idle, and to open the drain opening when no wash water is located inside the wash tub and when the drain pump is operating.

Abstract: An optical lens which, in a controlled manner, and without altering either the resolution or luminous capture, helps to extend the depth of field of any other optical system. The optical lens of the present invention is composed of two optical lenses that form a pair. Each of the lenses of the pair produces a change of optical path with a symmetrical distribution. If there is no relative displacement, the lenses of the pair generate an optical path difference equal to zero. When there is relative displacement, the lenses of the pair generate a change of optical path with asymmetric distribution, which helps to extend the depth of field without reducing either the resolution or luminous capture. The optical lens of this invention, in the form of an optical pair, serves any other optical system to capture images without loss of modulation, but with attenuated modulation which can be retrieved with digital processing algorithms known in the art.