Patent ID: 9609852
Date: 2017-04-04
CPC Classifications: A01K,Y10T

Claim:
1. A bird feeder comprising: a seed container; a center tube within said seed container; a seed tray screwthreadably engaged with a lower end of said seed container; a cartridge spring assembly comprising: a center rod having an enlarged lower end; a cap sitting on said enlarged lower end; a nut screwthreadably engaged with an upper end of said center rod; a spring extending about said center rod; an upper end of said spring being biased against said nut and a lower end of said spring being biased against said cap; a cover, said cover having an aperture, said center tube passing through said aperture; a hanger, said hanger being engaged with an upper portion of said center tube to thereby retain said cover in position; a shroud having a perch member, said shroud and said cartridge spring assembly being attached whereby rotation of said perch member will cause a change in spring tension of said spring; and a retainer secured to said lower end of said spring assembly to retain said shroud in position.