Abstract: An extruder or other similar tool head of a three-dimensional printer is slidably mounted along a feedpath of build material so that the extruder can move into and out of contact with a build surface according to whether build material is being extruded. The extruder may be spring-biased against the forward feedpath so that the extruder remains above the build surface in the absence of applied forces, and then moves downward into a position for extrusion when build material is fed into the extruder. In another aspect, modular tool heads are disclosed that can be automatically coupled to and removed from the three-dimensional printer by a suitable robotics system. A tool crib may be provided to store multiple tool heads while not in use.

Abstract: An extruder or other similar tool head of a three-dimensional printer is slidably mounted along a feedpath of build material so that the extruder can move into and out of contact with a build surface according to whether build material is being extruded. The extruder may be spring-biased against the forward feedpath so that the extruder remains above the build surface in the absence of applied forces, and then moves downward into a position for extrusion when build material is fed into the extruder. In another aspect, modular tool heads are disclosed that can be automatically coupled to and removed from the three-dimensional printer by a suitable robotics system. A tool crib may be provided to store multiple tool heads while not in use.

Abstract: An extruder or other similar tool head of a three-dimensional printer is slidably mounted along a feedpath of build material so that the extruder can move into and out of contact with a build surface according to whether build material is being extruded. The extruder may be spring-biased against the forward feedpath so that the extruder remains above the build surface in the absence of applied forces, and then moves downward into a position for extrusion when build material is fed into the extruder. In another aspect, modular tool heads are disclosed that can be automatically coupled to and removed from the three-dimensional printer by a suitable robotics system. A tool crib may be provided to store multiple tool heads while not in use.

Abstract: An extruder or other similar tool head of a three-dimensional printer is slidably mounted along a feedpath of build material so that the extruder can move into and out of contact with a build surface according to whether build material is being extruded. The extruder may be spring-biased against the forward feedpath so that the extruder remains above the build surface in the absence of applied forces, and then moves downward into a position for extrusion when build material is fed into the extruder. In another aspect, modular tool heads are disclosed that can be automatically coupled to and removed from the three-dimensional printer by a suitable robotics system. A tool crib may be provided to store multiple tool heads while not in use.

Abstract: An extruder or other similar tool head of a three-dimensional printer is slidably mounted along a feedpath of build material so that the extruder can move into and out of contact with a build surface according to whether build material is being extruded. The extruder may be spring-biased against the forward feedpath so that the extruder remains above the build surface in the absence of applied forces, and then moves downward into a position for extrusion when build material is fed into the extruder. In another aspect, modular tool heads are disclosed that can be automatically coupled to and removed from the three-dimensional printer by a suitable robotics system. A tool crib may be provided to store multiple tool heads while not in use.

Abstract: An exercise device can include a pair of pedal members, each of which can be rotatably connected on at least one end to a planet gear that is rotatable about a sun gear on each side of the device. The pedal members and the planet gears can be rotated to provide an elliptical exercise motion. The device can include a mechanism for simultaneously rotating each of the sun gears together to change the orientation of the elliptical exercise motion relative to a user. The orientation of an elliptical exercise motion can be changed dynamically from one orientation to another, for example, from horizontal to uphill or downhill, during a particular workout period. The exercise device can change the orientation of an elliptical exercise motion while maintaining a user's ankles at a substantially constant angle during the exercise cycle.

Abstract: An exercise device can include a pair of pedal members, each of which can be rotatably connected on at least one end to a planet gear that is rotatable about a sun gear on each side of the device. The pedal members and the planet gears can be rotated to provide an elliptical exercise motion. The device can include a mechanism for simultaneously rotating each of the sun gears together to change the orientation of the elliptical exercise motion relative to a user. The orientation of an elliptical exercise motion can be changed dynamically from one orientation to another, for example, from horizontal to uphill or downhill, during a particular workout period. The exercise device can change the orientation of an elliptical exercise motion while maintaining a user's ankles at a substantially constant angle during the exercise cycle.

Abstract: The present invention discloses a waste disposal apparatus including a container having a first end and a second end. A tubing cassette for supplying tubing is mounted proximate the first end of the container. A first sealing member and a second sealing member are moveable between an open position, wherein tubing from the tubing cassette can pass between the first and second sealing members, and a closed position, wherein the first and second sealing members can be activated to create a seal in the tubing. The first and second sealing members are guided by guide pins that travel along stepped channels for moving the first and second sealing members between the open and closed positions, and for pulling the tubing and waste packages through the waste disposal apparatus.

Abstract: An apparatus comprising: (a) a stationary base; (b) a drive assembly providing a drive member and means for reciprocating the drive member along a fixed linear path; (c) a femoral support extending between a first end connected to the base and a second end; (d) a tibial support extending between a first end connected to the second end of the femoral support and a second end; (e) a rigidly mounted, cantilevered femoral cradle slidably connected to the femoral support; (f) a rigidly mounted, cantilevered tibial cradle slidably connected to the tibial support; (g) a connecting member having an upper end connected to the tibial support second end and a lower end connected to the drive member; (h) a footrest structure mounted forwardly of the tibial cradle; and (i) the above elements arranged such that a person's leg is cyclically flexed and extended in response to reciprocation of said drive member.

Abstract: The present invention discloses a waste disposal apparatus including a container having a first end and a second end. A tubing cassette for supplying tubing is mounted proximate the first end of the container. A first sealing member and a second sealing member are moveable between an open position, wherein tubing from the tubing cassette can pass between the first and second sealing members, and a closed position, wherein the first and second sealing members can be activated to create a seal in the tubing. The first and second sealing members are guided by guide pins that travel along stepped channels for moving the first and second sealing members between the open and closed positions, and for pulling the tubing and waste packages through the waste disposal apparatus.

Abstract: The present invention discloses a waste disposal apparatus including a container having a first end and a second end. A tubing cassette for supplying tubing is mounted proximate the first end of the container. A first sealing member and a second sealing member are moveable between an open position, wherein tubing from the tubing cassette can pass between the first and second sealing members, and a closed position, wherein the first and second sealing members can be activated to create a seal in the tubing. The first and second sealing members are guided by guide pins that travel along stepped channels for moving the first and second sealing members between the open and closed positions, and for pulling the tubing and waste packages through the waste disposal apparatus.

Abstract: The present invention discloses a waste disposal apparatus including a container having a first end and a second end. A tubing cassette for supplying tubing is mounted proximate the first end of the container. A first sealing member and a second sealing member are moveable between an open position, wherein tubing from the tubing cassette can pass between the first and second sealing members, and a closed position, wherein the first and second sealing members can be activated to create a seal in the tubing. The first and second sealing members are guided by guide pins that travel along stepped channels for moving the first and second sealing members between the open and closed positions, and for pulling the tubing and waste packages through the waste disposal apparatus.

Abstract: A tissue processor having a process chamber and at least one liquid reservoir. At least one auxiliary reservoir is connected between the process chamber and the at least one liquid reservoir. There is a means to drive liquid from the at least one liquid reservoir to the auxiliary reservoir, and from the auxiliary reservoir to the process chamber. Preferably, there is a second auxiliary reservoir and means to drive fluid from the process chamber back to the liquid reservoir. The apparatus and related method are useful to treat and fix biological tissue samples for microscopic examination.

Abstract: A tissue processor having a process chamber and at least one liquid reservoir. At least one auxiliary reservoir is connected between the process chamber and the at least one liquid reservoir. There is a means to drive liquid from the at least one liquid reservoir to the auxiliary reservoir, and from the auxiliary reservoir to the process chamber. Preferably, there is a second auxiliary reservoir and means to drive fluid from the process chamber back to the liquid reservoir. The apparatus and related method are useful to treat and fix biological tissue samples for microscopic examination.