Locking pin assemblies and uses thereof

A key assembly comprising:

• a) an elongated key blade, the elongated key blade being substantially flat and having a first surface and a symmetric second surface defining a longitudinal axis;
• b) an ovoid depression defined on the first surface with a major axis and a minor axis, having side walls and a floor, wherein the major axis of the ovoid depression extends from the center of the elongated key blade—transverse to the longitudinal axis of the elongated key blade;
• c) an through aperture, defined in the ovoid depression spanning the width of the elongated key blade, the through aperture having a diameter smaller than the minor axis of the ovoid depression and is bored in the center of the key blade, wherein the floor of the ovoid depression form a shelf extending radially to the aperture;
• d) an ovoid male cap accommodated in the depression comprising:
• i. an outer surface and an inner surface;
• ii. a double flanged cylindrical fitting having an internal diameter extending inward from the inner surface, the fitting having a basal resilient interrupted flange, operable to frictionally engage a portion of an ovoid female base;
• e) the ovoid female base accommodated in the depression comprising:
• i. an outer surface identical to the outer surface of the ovoid male cap, and an inner surface;
• ii. a cylindrical well defined in the inner surface;
• iii. an annulus extending inward on the periphery of the cylindrical well, the annulus having an outer diameter sized to abut the minor axis of the ovoid depression, and be larger than the through aperture, the annulus defining an internal rim operable to engage the basal resilient interrupted flange of the ovoid male cap;
• and
• f) a first biasing element, disposed within the double flanged cylindrical fitting and abutting the inner surface at the cylindrical well of the ovoid female base and is operable to bias the ovoid male cap from the ovoid female base, wherein the outer surface of the ovoid male cap defines at least two different topologies.

A key and lock combination comprising

• a) a key assembly comprising:
• i. an elongated key blade, the elongated key blade being substantially flat and having a first surface and a symmetric second surface defining a longitudinal axis;
• ii. an ovoid depression defined on the first surface with a major axis and a minor axis, having side walls and a floor, wherein the major axis of the ovoid depression extends from the center of the elongated key blade—transverse to the longitudinal axis of the elongated key blade;
• iii. an through aperture, defined in the ovoid depression spanning the width of the elongated key blade, the through aperture having a diameter smaller than the minor axis of the ovoid depression and is bored in the center of the key blade, wherein the floor of the ovoid depression form a shelf extending radially to the aperture;
• iv. an ovoid male cap accommodated in the depression comprising:
• an outer surface and an inner surface;
• a double flanged cylindrical fitting having an internal diameter extending inward from the inner surface, the fitting having a basal resilient interrupted flange, operable to frictionally engage a portion of an ovoid female base;
• v. the ovoid female base accommodated in the depression comprising:
• an outer surface identical to the outer surface of the ovoid male cap, and an inner surface;
• a cylindrical well defined in the inner surface;
• an annulus extending inward on the periphery of the cylindrical well, the annulus having an outer diameter sized to abut the minor axis of the ovoid depression, and be larger than the through aperture, the annulus defining an internal rim operable to engage the basal resilient interrupted flange of the ovoid male cap;
• and
• a first biasing element, disposed within the double flanged cylindrical fitting and abutting the inner surface at the cylindrical well of the ovoid female base and is operable to bias the ovoid male cap from the ovoid female base, wherein the outer surface of the ovoid male cap defines at least two different topologies:
• at least partially inserted in
• b) an axial key way of a cylinder lock comprising:
• i. a rotatable barrel defining an external surface having a proximal end and a distal end with an axial keyway and a plurality of barrel bores extending radially from, and in communication with the keyway, the barrel being selectably, rotatably movable within a cylindrical housing portion;
• ii. the cylindrical housing portion having a column portion with a plurality of column bores in registration with the plurality of barrel bores, extending radially from the cylindrical housing portion, wherein at least one column bore and at least one barrel bore in registration therewith, in combinations comprise a locking pin assembly having a barrel pin assembly comprising:
• a barrel pin having a predetermined length with an apical end and a basal end, the barrel pin defining a longitudinal axis;
• and an extender, having an apical end, slidably, coupled to the barrel pin, operable to slidably translate along the barrel pin in parallel with the barrel pin's longitudinal axis:
• a column pin assembly comprising:
• a cylindrical sheath having an apical end, a basal end, an internal diameter and an external diameter;
• and a column pin having an apical end and a basal end, the column being, nested in and concentric with the cylindrical sheath, the column pin being slidably coupled to the cylindrical sheath;
• a stopper;
• and a biaser disposed beneath the stopper and coupled to the column pin, operable to bias the column pin away from the stopper.

A method of preventing an unauthorized entry to an enclosed space having an opening with a door having a cylinder lock therein by key bumping, the cylinder lock configured to transition between a locked position preventing entry to the enclosed space, and an open position allowing entry to the enclosed space, the method comprises:

• providing a door wherein the cylinder lock comprises:
• a rotatable barrel defining an external surface, having a proximal end and a distal end with an axial keyway and a plurality of barrel bores extending radially from, and in communication with the keyway, the barrel being selectably, rotatably movable within a cylindrical housing portion;
• the cylindrical housing portion having a column portion with a plurality of column bores in registration with the plurality of column bores, extending radially from the cylindrical housing portion, wherein at least one column bore and barrel bore in registration therewith, both—in combination comprise a locking pin assembly, wherein the locking pin assembly comprises a barrel pin assembly disposed within the barrel bore, the barrel pin assembly comprising a barrel pin having a predetermined length with an apical end and a distal end, the barrel pin defining a longitudinal axis;
• and an extender, having an apical end, slidably, coupled to the barrel pin, operable to slidably translate along the barrel pin in parallel with the barrel pin's longitudinal axis;
• a column pin assembly disposed within the column bore, the column pin assembly comprising:
• a cylindrical sheath having an apical end, a basal end, an internal diameter and an external diameter;
• and a column pin having an apical end and a basal end, the column pin being nested in and concentric with the cylindrical sheath, the column pin being slidably coupled to the cylindrical sheath;
• a stopper engaged within the column bore;
• and a biaser disposed in the column bore beneath the stopper and coupled to the column pin, operable to bias the column pin and cylindrical sheath away from the stopper toward the axial keyway.