Jul 8, 2025

US12352527 - Linkage dual mode release

The linkage dual mode release includes a main body, a string hook, a linkage lock, a thumb trigger, a sear, and a trigger bar flange. The main body has a first finger groove arm. The string hook is elastically pivoted to one end of the main body for releasably hook to a bow string. The linkage lock is elastically pivoted to an outer surface of the main body, and the linkage lock is located adjacent the other end of the main body opposite to the string hook. The linkage lock has a locking arm and a lever arm extending to the main body. The thumb trigger is mounted to the linkage lock extending away from the main body. The sear is pivoted to the main body, a rest member is located between the sear and the main body, the sear comprises a second finger groove arm.

Assignee: SHENZHEN RAVANON SPORTS GOODS CO., LTD.
Inventors: Shenglei Shi, Wanli Fan, Fangwei Jiang
Filing date: 2023-04-19

The patent describes a linkage dual mode release mechanism designed for bowstrings, featuring a main body with a string hook, linkage lock, thumb trigger, and sear. This innovative design allows for a user-friendly release by pulling the thumb trigger, which rotates the linkage lock and subsequently unlocks the string hook from the sear.

Claim 1

A linkage dual mode release, comprising: a main body having a first finger groove arm; a string hook, elastically pivoted to one end of the main body for releasably hook to a bow string; a linkage lock, elastically pivoted to an outer surface of the main body, and the linkage lock located adjacent the other end of the main body away from the string hook, the linkage lock having a locking arm and a lever arm extending to the main body; a thumb trigger, mounted to the linkage lock and extending away from the main body; a sear, pivoted to the main body, and located between the string hook and the linkage lock, a rest member located between the sear and the main body, the sear comprising a second finger groove arm, a first end of the second finger groove arm locking the string hook; and a trigger bar flange, protruding from the sear, and extending to the linkage lock and being locked by the locking arm; wherein when the thumb trigger is pulled by a thumb of the user, the thumb trigger the linkage lock to rotate, causing the trigger bar flange to be unlocked from the locking arm; and when the linkage lock continues to rotate, the lever arm exerts pressure on the sear to cause the sear to rotate, simultaneously, and the lever arm exerts pressure on the sear to cause the first finger groove arm to rotate, in turn unlocking the string hook from the sear; wherein the linkage lock is pivoted to the main body via a second pivot shaft, and a second reset member is sleeved on the second pivot shaft and located between the linkage lock and the main body; wherein the outer surface of the main body defines a channel, which is formed by two facing ridges of the main body, a part of the linkage lock extends into the channel and the second pivot shaft is inserted into the ridges and the linkage lock to enable the second pivot shaft to pivotively mounted to the main body; wherein the locking arm and the lever arm extend into the channel and resists against the main body; and wherein the first finger groove arm defines a first finger groove, a first knob and a second knob protrudes from the main body at an interval and opposite the first finger groove, the first knob and the second knob are configured to mounted the sear and the linkage lock respectively. a main body having a first finger groove arm; a string hook, elastically pivoted to one end of the main body for releasably hook to a bow string; a linkage lock, elastically pivoted to an outer surface of the main body, and the linkage lock located adjacent the other end of the main body away from the string hook, the linkage lock having a locking arm and a lever arm extending to the main body; a thumb trigger, mounted to the linkage lock and extending away from the main body; a sear, pivoted to the main body, and located between the string hook and the linkage lock, a rest member located between the sear and the main body, the sear comprising a second finger groove arm, a first end of the second finger groove arm locking the string hook; and a trigger bar flange, protruding from the sear, and extending to the linkage lock and being locked by the locking arm; wherein when the thumb trigger is pulled by a thumb of the user, the thumb trigger the linkage lock to rotate, causing the trigger bar flange to be unlocked from the locking arm; and when the linkage lock continues to rotate, the lever arm exerts pressure on the sear to cause the sear to rotate, simultaneously, and the lever arm exerts pressure on the sear to cause the first finger groove arm to rotate, in turn unlocking the string hook from the sear; wherein the linkage lock is pivoted to the main body via a second pivot shaft, and a second reset member is sleeved on the second pivot shaft and located between the linkage lock and the main body; wherein the outer surface of the main body defines a channel, which is formed by two facing ridges of the main body, a part of the linkage lock extends into the channel and the second pivot shaft is inserted into the ridges and the linkage lock to enable the second pivot shaft to pivotively mounted to the main body; wherein the locking arm and the lever arm extend into the channel and resists against the main body; and wherein the first finger groove arm defines a first finger groove, a first knob and a second knob protrudes from the main body at an interval and opposite the first finger groove, the first knob and the second knob are configured to mounted the sear and the linkage lock respectively.

Google Patents

https://patents.google.com/patent/US12352527

USPTO PDF

https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/12352527