Safety pin
OwnerPaul D. Bettersinventor
Life of this patent
Estimating the term…
Abstract
An injection molded safety pin particularly for use as a laundry net pin or for attachment of hunting tag holders to jackets and the like, said pin including a free shaft having a pointed first end with a groove which is transverse the shaft and adjacent the pointed end, a fixed shaft integrally connected at one end by a U-shaped portion to the second end of the free shaft, a head assembly integral with the second end of the fixed shaft and having a slot which is narrower than the free shaft to receive said first free end of the free shaft with a protrusion extending into the slot to engage the transverse groove on the shaft, said head assembly may include a spring biased clip or a wall which prevents the free shaft from deflecting out of the slot.
Claims3
A reusable safety pin formable in a single plastic injection molding, said safety pin comprising a free shaft having a first end with an indentation on one side only of said shaft adjacent said first end, a fixed shaft connected at one end by a resiliently flexible portion to the second end of the free shaft, and a head assembly connected to the second end of the fixed shaft, said head assembly including a back wall with a mold opening therethrough and with a resilient projection integrally formed with the back wall and extending above the back wall, a rear wall integral along one edge with said back wall and extending upwardly from said back wall, a tab extending inwardly from said rear wall and over said mold opening in said back wall, said tab positioned above said back wall at a height approximately equal to the thickness of said first end of said free shaft to provide a receiving slot for said free shaft, said tab including a downwardly projecting protrusion positioned over said mold opening and engageable with said indentation on said free shaft when said free shaft is inserted under said tab, said protrusion preventing axial movement of said free shaft, said resilient projection on said back wall positioned adjacent the free shaft when the free shaft is positioned in said receiving slot to increase the force required to remove the free shaft from the receiving slot thereby providing a reusable safety pin formable in a single injection molding without requiring the use of movable cores during the injection molding process.
A reusable safety pin formable in a single plastic injection molding without the use of movable cores, said safety pin comprising a free shaft having a groove in said shaft adjacent a first end of said free shaft, a fixed shaft connected to one end by a resilient U-shaped portion to the second end of the free shaft, and a head assembly connected to the second end of the fixed shaft, said head assembly including a back wall with a mold opening therethrough and with a clip means formed in said back wall, a rear wall integral with said rear wall and extending upwardly from said back wall, a tab extending inwardly from said back wall and over said mold opening in said back wall, said tab positioned above said back wall at a height approximately equal to the thickness of said first end of said free shaft to provide a receiving slot for said free shaft, said tab including a downwardly projecting protrusion engageable with said groove on said free shaft when said free shaft is inserted under said tab to prevent axial movement of said free shaft, said clip on said back wall positioned adjacent the free shaft to resist removal of the free shaft from said receiving slot, said groove having generally parallel side walls perpendicular to the axis of said first end of said shaft and a raised portion at the bottom of said groove and said protrusion on said tab having a shape complementary to said groove on said free shaft thereby providing a reusable safety pin formable in a single injection molding without requiring the use of movable cores during the injection molding process.
Dependencies are inferred from the claim text.