US3989026A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Archery bow with balanced adjustable tension
Assignee: Kidde Inc
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Filing: 1974-04-22
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Granted: 1976-11-02
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Expires: 1994-04-22
Abstract
Abstract A pair of oppositely extending bow arms on a main body portion have guides on their tips. A bowstring extending between the tips has end sections movably contacting the guides. The bow has a drawing force produced either by flexible bow arms or a resilient member on the bow, and a second guide is employed to receive the end sections of the bowstring and position them so that they will be acted upon equally by the drawing force while moving in unison with it to provide a balanced bow for accurate shooting of arrows. Control apparatus may be employed to decrease the tension on the bowstring as the latter approaches its fully drawn condition. In bows using flexible bow arms as the drawing force, a cable operatively connects the arms and unites them into common operation.
Inventors
- 👤 Jim Zenji Nishioka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:33
CPC Classifications
F; F41; F41B; F41B5/00; F41B5/0094; F41B5/10
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
163 words
An archery bow including a body portion, said body portion having a pair of oppositely extending bow arms with tip ends, a bowstring extending between said tip ends, said bowstring being a single elongated member having two terminal free end sections, guide means on the tip ends of each of said arms movably engaged by the respective end sections of said bowstring, tension means on said bow for producing variable tension in said bowstring to control the bowstring tension force while shooting an arrow engaged with said bowstring, and control means for controlling movements of said bow string end sections, said control means being positioned on said bow and including a pivotal member engaged by said end sections wherein movement of said two end sections as said bowstring is drawn causes pivoting of said pivotal member and simultaneous movement of said end sections wherein said tension developed in said end sections is at substantially equal amounts to accomplish accurate shooting of an arrow.
Claim 2
Dependent Claim
163 words
An archery bow including a body portion, said body portion having a pair of oppositely extending bow arms with tip ends, a bowstring extending between said tip ends, said bowstring being a single elongated member having two terminal free end sections, guide means on the tip ends of each of said arms movably engaged by the respective end sections of said bowstring, tension means on said bow for producing variable tension in said bowstring to control the bowstring tension force while shooting an arrow engaged with said bowstring, and control means for controlling movements of said bow string end sections, said control means being positioned on said bow and including a pivotal member engaged by said end sections wherein movement of said two end sections as said bowstring is drawn causes pivoting of said pivotal member and simultaneous movement of said end sections wherein said tension developed in said end sections is at substantially equal amounts to accomplish accurate shooting of an arrow.
Claim 3
Dependent Claim
35 words
The archery bow of claim 1 wherein said tension means comprises a resilient member having one end thereof connected to said end sections of the bowstring and having its other end anchored to the bow.
Claim 4
Dependent Claim
14 words
The archery bow of claim 2 wherein said resilient member includes a tension spring.
Claim 5
Dependent Claim
15 words
The archery bow of claim 3 including means for adjusting the tension of said spring.
Claim 6
Dependent Claim
17 words
The archery bow of claim 1 wherein said bow arms are flexible and comprise said tension means.
Claim 7
Dependent Claim
47 words
The archery bow of claim 1 wherein said bow arms flexible and comprise said tension means, and including a flexible link connected at its opposite ends of the respective bow arms, said link being associated with said pivotal member whereby to influence operation of said pivotal member.
Claim 8
Dependent Claim
14 words
The archery bow of claim 6 including means for shortening and lengthening said link.
Claim 9
Dependent Claim
20 words
The archery bow of claim 1 wherein said end sections of said bowstring extend movably around said pivotal central means.
Claim 10
Dependent Claim
18 words
The archery bow of claim 1 wherein said control means includes means for shortening and lengthening the bowstring.
Claim 11
Dependent Claim
27 words
The archery bow of claim 1 wherein said pivotal control means includes a single cross shaft and a rotatable member which pivots on said single cross shaft.
Claim 12
Dependent Claim
42 words
The archery bow of claim 10 wherein said rotatable control means has connecting terminals for said end sections, said terminals being located on opposite sides of said cross shaft to cause said rotatable control means to pivot as said bowstring is drawn.
Claim 13
Dependent Claim
65 words
The archery bow of claim 1 wherein said pivotal member is pivotally mounted and engaged by the end sections of said bowstring, whereby draw force applied to said bowstring and said end sections causes said pivotal member to pivot and decrease influence of said tension means on said pivotal member thereby decreasing the tension in said bowstring end sections when said bow is fully drawn.
Claim 14
Dependent Claim
56 words
The archery bow of claim 12 wherein said tension means includes said resilient member having one end thereof connected to said pivotal control means and its other end connected to said bow, and means on said rotatable control means for varying the ratio of elongation of said resilient member and said end sections of the bowstring.
Claim 15
Dependent Claim
24 words
The archery bow of claim 13 wherein said pivotal comprises a lever pivotally supported at one of its ends on said bow control means.
Claim 16
Dependent Claim
20 words
The archery bow of claim 14 including stop means arranged to limit the pivoting movement of said pivotal control means.
Claim 17
Dependent Claim
34 words
The archery bow of claim 1 wherein said pivotal includes connecting means to connect said end sections of said bowstring control means to said rotatable control means, said connecting means having multiple connecting locations.
Claim 18
Dependent Claim
92 words
The archery bow of claim 1 wherein said control means comprises a rigid support secured to said bow and disposed on the bowstring side of the bow between said tip ends, said pivotal member being pivotally mounted on said support and engaged by the end sections of said bowstring, whereby draw force applied to said bowstring and said end sections causes said pivotal member to pivot and decrease influence of said tension means on said pivotal member thereby decreasing the tension in said bowstring end sections when said bow is fully drawn.
Claim 19
Dependent Claim
17 words
The archery bow of claim 17 wherein said bow arms are flexible and comprise said tension means.
Claim 20
Dependent Claim
23 words
The archery bow of claim 18 including a flexible link connected to said bow arms, said flexible link engaging said pivotal control means.
Claim 21
Dependent Claim
31 words
The archery bow of claim 1 wherein said rotatable control means includes connecting means to connect said tension means to said rotatable control means, said connecting means having multiple connecting locations.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-11-02 | 1980-05-03 | 1980-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-02 | 1984-05-03 | 1984-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-02 | 1988-05-03 | 1988-11-02 | $7700.00 | Window Closed / Lapsed |