Patent ID: 11950573
Assignee: KSP INC
Field: Other special machines (Mechanical engineering)
Classification: CPC A | IPC A

Claim 0:
1. A bird feeder with a pull knob device for removing a base, comprising:
an enclosure having a top and bottom opening and a side wall, said enclosure comprising a plurality of holes providing access to birds to a bird feed contained inside the enclosure;
a top cover securing the top opening of the enclosure;
a plurality of locking apertures near a bottom end the side wall of the enclosure; and
a base member enclosing the bottom opening of the enclosure,
wherein the base member has a pull knob device fixed inside the base member,
wherein the base member comprises a plurality of locking apertures near the top of the base member, and
wherein the pull knob device comprises,
a metallic housing having locking pins passing through a cylindrical passage attached on sides of the housing,
a pull knob attached to a taper slider through a vertical pin,
a plurality of first compressive springs for locking pins forming spring-biased locking pins to bias the locking pins outwardly, wherein the spring-biased locking pins passing through the locking apertures of the base member are configured and arranged to engage one of the plurality of locking apertures on the enclosure to releasably secure the base member to the bottom opening of the enclosure, and
a second compressive spring for the taper slider biasing the pull knob in a release position, wherein the locking pins engages the taper slider and are configured to retract inwardly as the pull knob is pulled vertically downwards by a user to disengage the spring-biased locking pins from the locking aperture of the enclosure.