US 12,173,530 B2
Door lock and knob system with invisible hub
Lampros Sarbanis, Pireas Attikis (GR)
Appl. No. 17/912,178
Filed by Lampros Sarbanis, Pireas Attikis (GR)
PCT Filed Mar. 9, 2021, PCT No. PCT/GR2021/000014
§ 371(c)(1), (2) Date Sep. 16, 2022,
PCT Pub. No. WO2021/191641, PCT Pub. Date Sep. 30, 2021.
Claims priority of application No. 20200100154 (GR), filed on Mar. 23, 2020.
Prior Publication US 2023/0131844 A1, Apr. 27, 2023
Int. Cl. E05B 33/00 (2006.01); E05B 27/00 (2006.01); E05B 19/04 (2006.01); E05B 27/10 (2006.01)
CPC E05B 33/00 (2013.01) [E05B 27/0035 (2013.01); E05B 27/0057 (2013.01); E05B 19/04 (2013.01); E05B 27/10 (2021.08)] 3 Claims
OG exemplary drawing
 
1. A door lock and knob system with invisible hub, comprising:
a knob with a shaft ending in a knob gear;
a hub cap that closes with a rear cover, wherein the hub cap has an outer perforated hole, and on a center inside has a tube, an inclined pin pressure level, and an inclined key pressure level;
a circular case having an opening configured to correspond to the outer perforated hole and having a notch, the circular case further secured to the tube of the hub cap and positioned within the hub cap;
a hub having two legs, a key interface, and vertical longitudinal holes, in which repellent springs and locking pins are positioned, the hub inserted within the circular case such that the key interface is positioned within the opening of the circular case and the outer perforated hole of the hub cap;
a hub gear secured to the hub and having two notches, wherein each leg of the two legs of the hub passes through a corresponding notch of the two notches of the hub gear and through a semicircular hole of the rear cover of the hub cap:
a latch bolt secured to an end of each said leg of the two legs of the hub;
a base having a series of holes corresponding to the vertical longitudinal holes of the hub, each hole of the series of holes configured to secure an alignment pin and an extrusion spring, wherein a base cover is secured to the base, the base cover having a shaft and a roller axially secured to and rotatable about the shaft, wherein the base is movably secured to the circular base by fastening springs securing the base cover to the circular base such that the series of holes and each alignment pin are alignable with the notch of the circular base;
wherein when inserting a key with an appropriate configuration inside at least the key interface and with rotation of the hub cap, the inclined pin pressure level pushes down the roller of the base cover, which respectively pushes the base cover toward the circular case, aligning each said alignment pin and the locking pins with the notch allowing the hub to rotate, while at the same time the key is pressed inside by the inclined key pressure level pushing the hub gear into the engagement position with the knob gear connected to the knob by the shaft, such that rotating of the knob rotates both the knob gear and the hub gear, allowing opening of the latch bolt by rotating the knob.