Abstract: Housingless positive displacement pump assembly comprises one or more vane or gerotor type housingless positive displacement pump units, each comprising pump unit components. One or more retaining rods extend through axially aligned holes in a mounting flange at one end of the pump assembly and the pump unit components to hold the pump unit components in stacked relation to one another and connect the pump assembly to the mounting flange.

Abstract: Housingless positive displacement pump assembly comprises one or more vane or gerotor type housingless positive displacement pump units, each comprising pump unit components. One or more retaining rods extend through axially aligned holes in a mounting flange at one end of the pump assembly and the pump unit components to hold the pump unit components in stacked relation to one another and connect the pump assembly to the mounting flange.

Abstract: An egg removal apparatus includes a frame and a manifold removably secured to the frame. The frame is movable from a first location overlying an egg flat to a second location overlying an area adjacent the egg flat. When the frame is in the first location, eggs from an egg flat are picked up under vacuum via a plurality of flexible cups. When the frame is in the second position, the eggs are released from the plurality of flexible cups. The removable manifold can be quickly and easily removed from a supporting frame and cleaned as a unit.

Abstract: Methods and apparatus are provided for removing clear avian eggs from a moving egg flat without contacting the removed eggs and without contaminating the eggs remaining within the egg flat. Clear eggs are identified by passing an egg flat between respective pairs of light sources and light detectors and detecting the amount of light that passes through each egg. Clear eggs are then ejected from the moving egg flat into a stationary receptacle located above the moving egg flat by applying a first stream of air to the lower end of the clear egg. A second stream of air may also be applied to the egg after the egg has been lifted from the egg flat by the first stream of air. This second stream of air is applied to the egg along a direction substantially transverse to the first stream of air. A third stream of air may be utilized to dislodge an egg from a stuck condition prior to being ejected from the egg flat.

Abstract: A method for distinguishing live from dead poultry eggs comprises: (a) providing a light source (preferably an infrared light source) and a light detector in opposite facing relation to one another; (b) passing an egg between the light source and light detector; (c) switching the light source at a frequency greater than 100 cycles per second while passing the egg between the light source and the light detector; and (d) detecting light that passes through the egg from the light source with the light detector. Preferably, the egg is passed between the light source and the light detector without making contact therewith. And the method preferably further comprises the step of electronically filtering the signal detected by the light detector to distinguish light emitted from the light source from ambient light. Steps (b) through (d) may be repeated at a rate of at least one egg per second. Apparatus for carrying out the foregoing method is also provided.