Nearest analogue is a pollen catcher placed on a way of bees to the hive. 

Pollen catcher hangs on the front wall of the beehive ahead of bee-entrance. For bees which pass through the grates of pollen catcher with openings which diameter is about 4,9±0,1mm, pollen load breaks away from legs and falls in the tray of pollen catcher, what is closed from above with a net, which the nubbins of pollen load penetrate through. 

The main lack is low capacity of beehive gratings, as bees have to spend too much time and power to pass it. 

Production of analogue averages about 20-30%, sometimes up to 60% because bees have an ability inclining a belly from a side to the side and stretching out in turn back legs with a pollen load, to creep in to the beehive trough thin circle gratings. 

Source of analogue publication – journal “Apiary”#12, 2006year. 

Purpose of invention – to create a pollen catcher, through what bees could come into the beehive without large delay, giving as a most pollen load. 

Put purpose may be achieved due to right openings of correct hexahedral form of the pollen catchers grate, by a size 4,6±0,1mm is between parallel bases, thickness of what averages about 5±0,5mm and plates 10mm thick with conical form pilot holes, based simultaneously on the both sides of grate, less openings to the hexahedral openings. 

So the bee will creep into the pollen catcher just the same way as it creeps into the cell. 

There is a gap between face plate and grate (about 4±0,1mm), through what nubbins of pollen load`ll fall to the tray of pollen catcher. 

There is no gap between the plate, positioned behind the grate and present grate, that is made for better entrance and exit of bees trough the gate of pollen catcher to the beehive. 

At the pic1. showed common construction of pollen catcher. 

It consists of body 1, what has ventilation openings 4, tray 6, what has openings for pollen load ventilation, grate with hexahedral openings 3, plates 5 and plates 8 with pilot holes of cone form, the diameter of the less opening is about 6±0,2mm, and greater 9±0,2mm and gap 10, breadthways 4±0,1mm. 

The use of this device will increase the productivity of selection of bee pollen load in industrial scales. 

A patent of Ukraine is on an useful model #38787 from 26.01.2009