US12372739 - Turret with a zero stop
The patent describes a turret mechanism featuring a cam pin chassis, a stop ring with a spiral groove, and a turret cap, all aligned along a common rotational axis. This design allows for precise control of the turret’s rotational limits through engagement between the cam pin and the spiral groove, ensuring reliable positioning.
Claim 1
- A turret having screw defining an axis, the turret comprising: a cam pin chassis having a central bore and securing a cam pin, wherein the screw extends through the central bore, the cam pin extends from the chassis parallel with the axis, and the cam pin is linearly moveable within the cam pin chassis; a stop ring having a central bore, a first surface, and a second surface comprising a spiral groove terminating at first and second stop surfaces, wherein the screw extends through the central bore and the cam pin engages the spiral groove; and a turret cap having a central bore, wherein the screw extends through the central bore such that the turret cap, stop ring, and cam pin chassis have a common rotational axis, wherein the turret cap has a first surface having a groove terminating at first and second stop surfaces and the first surface of the stop ring comprises a pin, wherein the pin of the stop ring engages the groove of the turret cap; wherein a rotational limit of the turret is defined by one of the first and second stop surfaces of the stop ring. a cam pin chassis having a central bore and securing a cam pin, wherein the screw extends through the central bore, the cam pin extends from the chassis parallel with the axis, and the cam pin is linearly moveable within the cam pin chassis; a stop ring having a central bore, a first surface, and a second surface comprising a spiral groove terminating at first and second stop surfaces, wherein the screw extends through the central bore and the cam pin engages the spiral groove; and a turret cap having a central bore, wherein the screw extends through the central bore such that the turret cap, stop ring, and cam pin chassis have a common rotational axis, wherein the turret cap has a first surface having a groove terminating at first and second stop surfaces and the first surface of the stop ring comprises a pin, wherein the pin of the stop ring engages the groove of the turret cap; wherein a rotational limit of the turret is defined by one of the first and second stop surfaces of the stop ring.
Google Patents
https://patents.google.com/patent/US12372739
USPTO PDF
https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/12372739