Abstract: A reservoir includes first and second chambers, and a piston having first and second ends disposed in the first and second chambers, respectively. The first and second ends isolate a first area from a second area within the first and second chambers. The first area of the first chamber is in fluid communication with a high pressure fluid source and the second area of the first chamber is in fluid communication with a low pressure fluid source. An orifice is formed in the first end and is configured to allow fluid communication between the upper and lower areas of the first chamber. A pumping system and an aircraft are also disclosed.

Abstract: A vent valve according to an exemplary aspect of the present disclosure includes, among other things, a sensing sleeve defining a sensing chamber and a vent channel for venting fluid out of the sensing chamber. A sensing piston is moveable within the sensing chamber between an open position and a closed position. The sensing piston allows flow of the fluid into the vent channel during movement of the sensing piston between the open and closed positions.

Abstract: A gear includes a gear root defined by a stretched root blended into an involute tooth profile curve within a True Involute Form diameter.

Abstract: A vent valve according to an exemplary aspect of the present disclosure includes, among other things, a sensing sleeve defining a sensing chamber and a vent channel for venting fluid out of the sensing chamber. A sensing piston is moveable within the sensing chamber between an open position and a closed position. The sensing piston allows flow of the fluid into the vent channel during movement of the sensing piston between the open and closed positions.

Abstract: A reservoir includes first and second chambers, and a piston having first and second ends disposed in the first and second chambers, respectively. The first and second ends isolate a first area from a second area within the first and second chambers. The first area of the first chamber is in fluid communication with a high pressure fluid source and the second area of the first chamber is in fluid communication with a low pressure fluid source. An orifice is formed in the first end and is configured to allow fluid communication between the upper and lower areas of the first chamber. A pumping system and an aircraft are also disclosed.

Abstract: A planetary gear system includes a sun gear rotatable about an axis. Planetary gears are circumferentially arranged about and intermesh with the sun gear and peripherally with a ring gear. Each of the planetary gears is supported by a journal bearing arranged in a bore in a carrier wall. A carrier supports the journal bearings and is configured to rotate about the axis and carry the planetary gears. The carrier wall supports the journal bearings and has spaced apart lateral surfaces. A scupper is arranged between the lateral surfaces and provides an inlet in one of the lateral surfaces, in this example facing the sun gear. The inlet has a first circumferential dimension, and a passage fluidly interconnects the scupper to one of the journal bearings via the bore. The passage has a second circumferential dimension less than the first circumferential dimension.

Abstract: A planetary gear system includes a sun gear rotatable about an axis. Planetary gears are circumferentially arranged about and intermesh with the sun gear and peripherally with a ring gear. Each of the planetary gears is supported by a journal bearing arranged in a bore in a carrier wall. A carrier supports the journal bearings and is configured to rotate about the axis and carry the planetary gears. The carrier wall supports the journal bearings and has spaced apart lateral surfaces. A scupper is arranged between the lateral surfaces and provides an inlet in one of the lateral surfaces, in this example facing the sun gear. The inlet has a first circumferential dimension, and a passage fluidly interconnects the scupper to one of the journal bearings via the bore. The passage has a second circumferential dimension less than the first circumferential dimension.

Abstract: A gear includes a gear root defined by a stretched root blended into an involute tooth profile curve within a True Involute Form diameter.

Abstract: A level comprises a body, a body orientation detector, a laser beam source, a laser beam configuring lens, and a manually engageable lens switch. The body orientation indicator is carried by the body and constructed and arranged to indicate an orientation of the body. The laser beam source is carried by the body and constructed and arranged to emit a laser beam from the body to a location on a surface remote from the body, the laser beam being directed at a predetermined orientation with respect to the body to interrelate the orientation of the body with respect to the location on the surface remote from the body. The laser beam configuring lens assembly is carried by the body and movable between a first position and a second position with respect to the laser beam source.

Abstract: A hidden object sensor is described which senses and locates hidden objects hidden behind a surface of an architectural structure. The sensor includes sensing elements for sensing live wires behind the accessible surface, and separate sensing elements for respectively sensing metal and non-metallic objects behind the tested surface. A microprocessor alternates between the use of the various sensing elements and their associated circuits to detect live wires, metal objects, or wood studs. Visible and audible indicators are provided for indicating the device's mode of operation and the locations of sensed hidden objects.

Abstract: A measuring device includes a housing, a distance measuring apparatus carried on the housing, one or more housing orientation indicators, and a focused light beam source. Using the housing orientation indicators, the housing can be properly oriented so that a focused light beam emitted by the focused light beam source will illuminate a point on a remote surface to accurately transfer the position of the housing to the remote surface.

Abstract: A hidden object sensor is described which senses and locates hidden objects hidden behind a surface of an architectural structure. The sensor includes sensing elements for sensing live wires behind the accessible surface, and separate sensing elements for respectively sensing metal and non-metallic objects behind the tested surface. A microprocessor alternates between the use of the various sensing elements and their associated circuits to detect live wires, metal objects, or wood studs. Visible and audible indicators are provided for indicating the device's mode of operation and the locations of sensed hidden objects. If a live wire is sensed, the processor may preclude an indication of a metal object or wood stud.

Abstract: A two-piece mechanical joint light weight bearing includes a liner of leaded bronze joined with an outer sleeve of an aluminum alloy. The joint consists of a straight cylindrical section and a threaded section along the axial direction of the bearing. Both the threaded and straight cylindrical sections of the bearing employ a radial interference fit to ensure positive contact between the bronze and aluminum materials. The interference fit is selected to compensate for radial differential thermal expansion between the liner and sleeve and provides a prevailing torque to prevent rotational movement between the liner and sleeve. A molded elastomer seal is located on a first end of the bearing to provide a seal between the liner and sleeve. A method of assembling the bearing includes establishing a relative temperature differential between the component parts, assembling the component parts while held at the differential temperature and then stabilizing the completed assembly at room temperature.

Abstract: Defects in the glass lining of a production-size reactor can be conveniently and inexpensively repaired by (a) applying a thin primer that contains a silane coupling agent, (b) applying a dental composite, and (c) then curing the resin of the composite. This strongly bonds the dental composite to the glass and, when the defect extends to the metal jacket of the reactor, also strongly bonds the composite to the metal. Preferably prior to step (b), the primer is covered by a light-curable adhesive that can covalently bond both to the silane coupling agent of the primer and to the resin of the dental composite. By patching the glass lining in this way, there is little danger of fire or explosion or hazard to the health of the person who applies the patch, and reactor down-time is significantly reduced compared to prior patching methods.