US4050438A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spring type projecting device
Assignee: Individual
•
Filing: 1976-07-14
•
Granted: 1977-09-27
•
Expires: 1996-07-14
Abstract
Abstract A slingshot comprises a stock having front and rear ends. A manual gripping handle is disposed at the rear end of the stock. A pair of sheaves are rotatably mounted adjacent the front end and rear end of the stock on opposite sides of the fore-to-aft longitudinal axis of the stock. These sheaves are rotatable about generally upright parallel axes of rotation. An elastic band is provided having outer free ends anchored at points disposed adjacent the rear end of the stock on opposite sides of the fore-to-aft longitudinal stock axis. The elastic band extends forwardly from these anchoring points and is wrapped around the rotatable sheaves. The elastic band includes a pouch capable of carrying an object to be propelled. Upon displacement, the band is stretched in an energy-storing fashion so as to propel the object forwardly upon release. This arrangement provides an inordinately long length of elastic band, thereby increasing the ability of the band to stretch and maximizing its energy-storing capacity. As a result, the velocity of fired projectiles can be significantly increased without appreciably increasing the force required to extend the band, or the length of the stock.
Inventors
- 👤 James M. Pfotenhauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 06:57
CPC Classifications
F; F41; F41B; F41B3/00; F41B3/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
275 words
A slingshot comprising: a stock having front and rear ends; manual gripping handle means disposed at the rear end of said stock; a pair of sheaves rotatably mounted adjacent the front end of said stock on opposite sides of the fore-to-aft longitudinal axis of said stock; said sheaves being rotatable about generally upright parallel axes of rotation; elastic band means having outer free ends thereof anchored at points disposed adjacent the rear end of said stock on opposite sides of said fore-to-aft longitudinal stock axis; said elastic band means extending forwardly from said anchoring points and being wrapped around said rotatable sheaves; said elastic band means including a pouch capable of carrying an object to be propelled; said pouch disposed for manual rearward displacement in a direction parallel to said axis to stretch said elastic band means in an energy-storing fashion throughout the length thereof so as to propel said object forwardly upon release; and front and rear support frames mounted on opposite sides of said fore-to-aft extending stock axis; each front frame including: a front sheave mount section rotatably carrying one of said sheaves above the plane of said stock, and a front section extending generally at a right angle from said front mounting section generally at a right angle from said front section and fixedly connected to said stock, each rear frame comprising a rear section extending generally parallel to said front section and rear mounting section extending generally at a right angle from said rear section and being fixedly connected to said stock; each of said free ends of said elastic band means being connected to one of said rear upright sections.
Claim 2
Dependent Claim
275 words
A slingshot comprising: a stock having front and rear ends; manual gripping handle means disposed at the rear end of said stock; a pair of sheaves rotatably mounted adjacent the front end of said stock on opposite sides of the fore-to-aft longitudinal axis of said stock; said sheaves being rotatable about generally upright parallel axes of rotation; elastic band means having outer free ends thereof anchored at points disposed adjacent the rear end of said stock on opposite sides of said fore-to-aft longitudinal stock axis; said elastic band means extending forwardly from said anchoring points and being wrapped around said rotatable sheaves; said elastic band means including a pouch capable of carrying an object to be propelled; said pouch disposed for manual rearward displacement in a direction parallel to said axis to stretch said elastic band means in an energy-storing fashion throughout the length thereof so as to propel said object forwardly upon release; and front and rear support frames mounted on opposite sides of said fore-to-aft extending stock axis; each front frame including: a front sheave mount section rotatably carrying one of said sheaves above the plane of said stock, and a front section extending generally at a right angle from said front mounting section generally at a right angle from said front section and fixedly connected to said stock, each rear frame comprising a rear section extending generally parallel to said front section and rear mounting section extending generally at a right angle from said rear section and being fixedly connected to said stock; each of said free ends of said elastic band means being connected to one of said rear upright sections.
Claim 3
Dependent Claim
69 words
A slingshot according to claim 1 wherein said elastic band means comprises a pair of elastic band segments; the outer free end of each segment being anchored to said stock and the other end of each segment being connected to one side of said pouch; said pouch comprising a flexible strip having a slot formed therein and only partially therethrough intermediate its ends for centering objects to be propelled.
Claim 4
Dependent Claim
74 words
A slingshot according to claim 1 including a channel extending fore-to-aft along said stock; said channel being forwardly and upwardly open; an impact side being slidable within said channel; and a flexible connector connecting said pouch to said slide so that forward movement of said pouch pursuant to release of a tensioned band is transmitted to said slide to drive said slide forwardly to propel from said channel objects located in said channel thereahead.
Claim 5
Dependent Claim
55 words
A slingshot according to claim 1 wherein said gripping handle means is disposed at a point located forwardly of the rear end of said stock; a bracing stock portion depending downwardly from said stock behind said handle, said brace stock portion being engageable with the body of a shooter to support said stock during firing.
Claim 6
Dependent Claim
37 words
A slingshot according to claim 4 wherein said bracing stock portion includes a curved abutment knob projecting rearwardly from a bottom end of said bracing stock portion for engagement with the leg of a shooter during firing.
Claim 7
Dependent Claim
34 words
A slingshot according to claim 1 wherein said band means, when in a rest condition, includes a portion extending linearly from one of said sheaves to the other, across the front of said stock.
Claim 8
Dependent Claim
46 words
A slingshot according to claim 1 wherein said pouch includes slots at each end; said band means comprising bifurcated clamps mounted in said slots and a pair of elastic tubular band segments mounted over and in tight frictional contact with leg portions of each bifurcated clamp.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-26 | 1981-03-28 | 1981-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-26 | 1985-03-28 | 1985-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-26 | 1989-03-28 | 1989-09-27 | $7700.00 | Window Closed / Lapsed |