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US 7,922,609 B1Granted
Arrow nocks
OwnerKhosro B. Hajariinventor
Life of this patent
Estimating the term…
Abstract
An arrow nock having a telescoping impeller and housing with a resilient spring for enhancing the acceleration of launch. In various embodiments, effective together or independently, the housing and impeller are configured and coupled to: create arrow rotation during launch; grip the bowstring during notching and release it during launch; and generate tracking signals.
Claims18
An arrow nock for mounting on the end of an arrow shaft, comprising
- (a) a cylindrical housing having first and second ends;
- (b) impeller means mounted within said housing and adapted for translation along the longitudinal axis of said housing;
- (c) resilient means interposed between said first end of said housing and said impeller means having a quiescent expanded state holding said housing and impeller means separated with substantially maximum displacement along said axis;
- (d) cocking means holding said resilient means compressed whereby said housing and said impeller means are positioned with minimum axial displacement along said axis;
- and
- (e) release means for releasing said resilient means to expand.
3 more elements
An arrow nock configured at a firs end for mounting on the end of an arrow and having a shaft projecting from a second end with a notch for engagement by a bowstring, comprising
- (a) a cylindrical housing having forward and distal ends;
- (b) impeller means mounted within said housing and adapted for translation along the longitudinal axis of said housing;
- (c) resilient means interposed between one end of said housing and said impeller means having a quiescent expanded state holding said housing and impeller means separated with substantially maximum displacement along said axis;
- (d) torsional coupling means coupling said housing and said impeller means to impart relative rotation about said axis as said housing and said impeller means are axially displaced;
- (e) cocking means holding said resilient means compressed whereby said housing and said impeller means are positioned with minimum axial displacement along said axis;
- (f) release means for releasing said resilient means to expand;
- (g) releasable gripper means to open and close said notch responsive to the axial relationship of said housing and said impeller means;
- and
- (h) signal means operative when said housing and said impeller means are in a predetermined axial position.
6 more elements
Dependencies are inferred from the claim text.