US3854467A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Force multiplying type archery bow
Assignee: HERTERS Inc
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Filing: 1974-03-14
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Granted: 1974-12-17
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Expires: 1994-03-14
Abstract
Abstract An archery bow includes a handle having resilient limbs secured thereto and extending outwardly therefrom. A pair of eccentric sheaves are revolvably mounted on the handle and a pair of pulleys are revolvably mounted on the ends of the limbs. A bowstring has its ends anchored to the handle and is trained about the eccentric sheaves and pulleys to define a nocking stretch. When the bowstring is drawn, the eccentric sheaves produce an overcenter action so that the force beyond this point is less than the force required at an intermediate draw position. A pair of concentric sheaves are each connected to one of the eccentric sheaves, and an endless crossed cable is trained about these concentric sheaves to thereby cause the eccentric sheaves to rotate in unison during movement of the nocking stretch between drawn and rest positions.
Inventors
- 👤 R Hofmeister
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:17
CPC Classifications
F; F41; F41B; F41B5/00; F41B5/10; F41B5/105
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
221 words
An archery bow comprising: an elongate handle member having spaced apart ends, a pair of elongate resilient limbs connected to the ends of said handle member and projecting outwardly therefrom, said limbs having free terminAl ends, a bowstring support means mounted on said limbs adjacent the free terminal ends thereof, a pair of similar eccentric sheaves, each eccentric sheave of said pair of eccentric sheaves being revolvably mounted on said handle immediately adjacent each end thereof, a pair of concentric sheaves, each concentric sheave of said pair of concentric sheaves being fixedly connected to an associated one of said eccentric sheaves and revolvable therewith, a bowstring assembly having opposite free ends thereof connected with said handle and being trained about said spaced apart eccentric sheaves and about said bowstring support means and defining a nocking stretch between said bowstring support means, said nocking stretch being movable between drawn and rest positions, said eccentric sheaves being revolvable in response to movement of the nocking stretch between the drawn and rest positions, an elongate flexible, endless connecting cable trained about said spaced apart concentric sheaves to define a pair of stretches which cross each other and cooperating with said concentric sheaves to cause said eccentric sheaves to rotate in unison in response to movement of the nocking stretch between drawn and rest position.
Claim 2
Dependent Claim
221 words
An archery bow comprising: an elongate handle member having spaced apart ends, a pair of elongate resilient limbs connected to the ends of said handle member and projecting outwardly therefrom, said limbs having free terminAl ends, a bowstring support means mounted on said limbs adjacent the free terminal ends thereof, a pair of similar eccentric sheaves, each eccentric sheave of said pair of eccentric sheaves being revolvably mounted on said handle immediately adjacent each end thereof, a pair of concentric sheaves, each concentric sheave of said pair of concentric sheaves being fixedly connected to an associated one of said eccentric sheaves and revolvable therewith, a bowstring assembly having opposite free ends thereof connected with said handle and being trained about said spaced apart eccentric sheaves and about said bowstring support means and defining a nocking stretch between said bowstring support means, said nocking stretch being movable between drawn and rest positions, said eccentric sheaves being revolvable in response to movement of the nocking stretch between the drawn and rest positions, an elongate flexible, endless connecting cable trained about said spaced apart concentric sheaves to define a pair of stretches which cross each other and cooperating with said concentric sheaves to cause said eccentric sheaves to rotate in unison in response to movement of the nocking stretch between drawn and rest position.
Claim 3
Dependent Claim
42 words
The archery bow as defined in claim 1 wherein each eccentric sheave has a pair of circumferential grooves in the surface thereof, and a passage extending generally diametrically through each sheave intercommunicating one groove in eccentric sheave with the other groove thereof.
Claim 4
Dependent Claim
61 words
The archery bow as defined in claim 1 wherein each concentric sheave has a pair of circumferential grooves in the surface thereof, and a passage extending diametrically through each concentric sheave intercommunicating one groove in an eccentric sheave with the other groove thereof, said bowstring assembly being positioned in the grooves of each concentric sheave and extending through the passage therein.
Claim 5
Dependent Claim
33 words
The archery bow as defined in claim 1 wherein said bowstring support means comprises at least one pair of pulleys, each pulley being mounted on one of said limbs adjacent the end thereof.
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) | 1977-12-16 | 1978-06-17 | 1978-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-16 | 1982-06-17 | 1982-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-16 | 1986-06-17 | 1986-12-17 | $7700.00 | Window Closed / Lapsed |