Propeller spinner for model airplanes

Claim 2

A propeller spinner for model airplanes comprising a generally conically shaped shell of impact resistant material including a forward portion and a rear portion, there being cooperating locking means and self-aligning means on said forward and rear portions for releasably joining those portions together with said rear portion being configured to be secured to a propeller and propeller shaft, and in which (1) said forward portion has a closed, generally pointed end and an open, enlarged end; (2) said rear portion has a generally planar wall closing one end thereof and substantially commensurate in diameter with said open end of said forward portion and a rearwardly directed skirt extending from the periphery of said wall, and is characterized by an opening in the center of its planar wall to receive means for attaching said rear portion to a propeller shaft and a plurality of notches in its skirt to receive the blades of a propeller passing radially outwardly through said rear portion, and (3) said cooperating locking means is in the nature of a snap-locking means and said snap-locking means and self-aligning means each comprises means on said planar wall of said rear portion and means on said forward portion at the open end thereof, said snap-locking means including a plurality of rearwardly extending, resilient arms on said forward portion at the open end thereof, each disposed at least somewhat radially inwardly from the periphery of said open end.

Claim 3

A propeller spinner for model airplanes comprising a generally conically shaped shell of impact resistant material including a forward portion and a rear portion, there being cooperating locking means and self-aligning means on said forward and rear portions for releasably joining those portions together with said rear portion being configured to be secured to a propeller and propeller shaft, and in which (1) said forward portion has a closed, generally pointed end and an open, enlarged end; (2) said rear portion has a generally planar wall closing one end thereof and substantially commensurate in diameter with said open end of said forward portion and a rearwardly directed skirt extending from the periphery of said wall, and is characterized by an opening in the center of its planar wall to receive means for attaching said rear portion to a propeller shaft and a plurality of notches in its skirt to receive the blades of a propeller passing radially outwardly through said rear portion, and (3) said cooperating locking means is in the nature of a snap-locking means and said snap-locking means and self-aligning means each comprises means on said planar wall of said rear portion and means on said forward portion at the open end thereof, said snap-locking means including a plurality of rearwardly extending, resilient arms on said forward portion at the open end thereof, each disposed at least somewhat radially inwardly from the periphery of said open end.

Claim 4

A propeller spinner for model airplanes comprising a generally conically shaped shell of impact resistant material including a forward portion and a rear portion, there being cooperating locking means and self-aligning means on said forward and rear portions for releasably joining those portions together with said rear portion being configured to be secured to a propeller and propeller shaft, and in which (1) said forward portion has a closed, generally pointed end and an open, enlarged end; (2) said rear portion has a generally planar wall closing one end thereof and substantially commensurate in diameter with said open end of said forward portion and a rearwardly directed skirt extending from the periphery of said wall, and is characterized by an opening in the center of its planar wall to receive means for attaching said rear portion to a propeller shaft and a plurality of notches in its skirt to receive the blades of a propeller passing radially outwardly through said rear portion, and (3) said cooperating locking means is in the nature of a snap-locking means and said snap-locking means and self-aligning means each comprises means on said planar wall of said rear portion and means on said forward portion at the open end thereof, said snap-locking means including a plurality of rearwardly extending, resilient arms on said forward portion at the open end thereof, each disposed at least somewhat radially inwardly from the periphery of said open end.

Claim 5

A propeller spinner for model airplanes comprising a generally conically shaped shell of impact resistant material including a forward portion and a rear portion, there being cooperative locking means and self-aligning means on said forward and rear portions for releasably joining those portions together with said rear portion being configured to be secured to a propeller and propeller shaft, and in which (1) said forward portion has a closed, generally pointed end and an open, enlarged end; (2) said rear portion has a generally planar wall closing one end thereof and substantially commensurate in diameter with said open end of said forward portion and a rearwardly directed skirt extending from the periphery of said wall, and is characterized by an opening in the center of its planar wall to receive means for attaching said rear portion to a propeller shaft and a plurality of notches in its skirt to receive the blades of a propeller passing radially outwardly through said rear portion, and (3) said cooperating locking means is in the nature of a snap-locking means and said snap-locking means and self-aligning means each comprise means on said planar wall of said rear portion and means on said forward Portion at the open end thereof, said self-aligning means including (i) a plurality of rearwardly directed flanges in said forward portion at the open end thereof terminating in the plane of said open end and (ii) a plurality of forwardly extending part-circular ridges on the front surface of said planar wall of said rear portion disposed radially inwardly of said flanges on said forward portion with said flanges and said part-circular ridges being in cooperatively engaging, interfitting relationship one with another when said forward portion is attached to said rear portion.

Claim 6

A propeller spinner for model airplanes comprising a generally conically shaped shell of impact resistant material including a forward portion and a rear portion, there being cooperative locking means and self-aligning means on said forward and rear portions for releasably joining those portions together with said rear portion being configured to be secured to a propeller and propeller shaft, and in which (1) said forward portion has a closed, generally pointed end and an open, enlarged end; (2) said rear portion has a generally planar wall closing one end thereof and substantially commensurate in diameter with said open end of said forward portion and a rearwardly directed skirt extending from the periphery of said wall, and is characterized by an opening in the center of its planar wall to receive means for attaching said rear portion to a propeller shaft and a plurality of notches in its skirt to receive the blades of a propeller passing radially outwardly through said rear portion, and (3) said cooperating locking means is in the nature of a snap-locking means and said snap-locking means and self-aligning means each comprise means on said planar wall of said rear portion and means on said forward Portion at the open end thereof, said self-aligning means including (i) a plurality of rearwardly directed flanges in said forward portion at the open end thereof terminating in the plane of said open end and (ii) a plurality of forwardly extending part-circular ridges on the front surface of said planar wall of said rear portion disposed radially inwardly of said flanges on said forward portion with said flanges and said part-circular ridges being in cooperatively engaging, interfitting relationship one with another when said forward portion is attached to said rear portion.

Claim 7

A propeller spinner for model airplanes according to claim 1 in which said snap-locking means further includes openings in said planar wall of said rear portion disposed in substantial alignment with said arms on said forward portion when said forward and rear portions are in operative position relative one to another and through which said arms extend when said forward and rear portions are joined together.

Claim 8

A propeller spinner for model airplanes according to claim 3 in which said rearwardly extending, resilient arms on said forward portion include thickened portions at their rear, free ends, said thickened portions being adapted to be projected through said openings and received behind said planar wall of said rear portion for joining said forward and rear portions together.

Claim 9

A propeller spinner for model airplanes according to claim 4 in which said thickened portions of said arms each are characterized by oppositely sloping surfaces forwardly and rearwardly thereof for reducing resistance to movement of said thickened portions through said openings in the planar wall of said rear portion.