Patent ID: 7992520

Claim:
A squirrel-proof bird feeder, comprising: a vertically disposed inner housing member, having upper and lower ends, a plurality of vertically spaced-apart housing segments having upper and lower ends; the spacing of said housing segments defining feed openings therebetween; said housing segments of said inner housing member being comprised of a metal material having openings formed therein which are sized so as to maintain feed therein; a combination feed level control and feed port device positioned in each of said feed openings in said inner housing member which maintains a certain amount of feed at that level even though the main supply of feed has dropped below the combination feed level control and feed port device and which provides a feed port in the associated feed opening; a vertically disposed outer housing member, having upper and lower ends, including a plurality of vertically spaced-apart housing segments; the spacing of said housing segments defining feed openings therebetween; said housing segments of said outer housing member being comprised of a metal material having openings formed therein; said outer housing member including a support which is secured to a the lowermost housing segment of said outer housing member and which is spaced below the lower end of the lowermost housing segment thereof to define a feed opening therebetween; said inner housing member having a feed port secured to a the lower end of a the lowermost housing segment thereof; said inner housing member being positioned in said outer housing member; said outer housing member being vertically movable between first and second positions with respect to said inner housing member; said feed ports of said combination feed level control and feed port devices of said inner housing member registering with said feed openings between said housing segments of said outer housing member when said outer housing member is in its said first position; said feed port at said lower end of the lowermost housing segment of said inner housing member registering with said feed opening below the lower end of the lowermost housing segment of said outer housing member when said outer housing member is in its said first position; said feed openings between said housing segments of said outer housing member being positioned below said feed ports of said feed level control and feed port devices when said outer housing member is in its said second position; said feed openings below the lower end of the lowermost housing segment of said outer housing member being positioned below said feed port at said lower end of the lowermost housing segment of said inner housing member when said outer housing member is in its said second position; and a spring means interconnecting said inner and outer housing members to yieldably maintain said outer housing member in its said first position but will permit said outer housing member to move to its said second position if a squirrel should move onto said outer housing member.