Patent US4121586A successfully refreshed from Google Patents.
US4121586A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blow gun innoculating dart
Assignee: Individual
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Filing: 1977-05-02
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Granted: 1978-10-24
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Expires: 1997-05-02
Abstract
Abstract An innoculating dart especially designed for use with blow guns. The dart can be accurately fired for distances up to in excess of 25 feet in order to innoculate and/or tranquilize animals. The dart is designed to expel its contained innoculating fluid, after being shot from a blow gun, upon impact with the target animal.
Inventors
- 👤 Edward M. Lawrence
- 👤 Brian E. Lawrence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:04
CPC Classifications
A; A61; A61D; A61D7/00; F; F41; F41B; F41B11/00; F41B11/80; F41B11/85; F42; F42B; F42B12/00; F42B12/02; F42B12/36; F42B12/46; F42B12/54
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
156 words
An innoculating dart for blow guns, comprising a hollow syringe barrel having forward and rearward ends, and having near its rearward end, an alignment aperture, a tubular needle in communication with said syringe barrel positioned at the forward end of said syringe barrel, and a plunger having front and back ends, reciprocally mounted within the rearward end of said barrel, a power head sealer mounted on said dart, biasing means associated with said plunger to normally urge said plunger to a closed forward position in said barrel, and a plurality of spaced apart transverse openings extending through said plunger, for mating alignment with the alignment aperture of said syringe barrel, and an easy break-away shear pin which may be extended through said alignment aperture of said syringe barrel and any one of said transverse opening at least partially across the rearward end of said syringe barrel to releasably hold said plunger in a cocked, rearward position.
Claim 2
Dependent Claim
156 words
An innoculating dart for blow guns, comprising a hollow syringe barrel having forward and rearward ends, and having near its rearward end, an alignment aperture, a tubular needle in communication with said syringe barrel positioned at the forward end of said syringe barrel, and a plunger having front and back ends, reciprocally mounted within the rearward end of said barrel, a power head sealer mounted on said dart, biasing means associated with said plunger to normally urge said plunger to a closed forward position in said barrel, and a plurality of spaced apart transverse openings extending through said plunger, for mating alignment with the alignment aperture of said syringe barrel, and an easy break-away shear pin which may be extended through said alignment aperture of said syringe barrel and any one of said transverse opening at least partially across the rearward end of said syringe barrel to releasably hold said plunger in a cocked, rearward position.
Claim 3
Dependent Claim
20 words
The innoculating dart of claim 1 wherein said easy break-away shear pin is a clay based mechanical pencil lead material.
Claim 4
Dependent Claim
15 words
The innoculating dart of claim 1 wherein a counterweight is positioned over said tubular needle.
Claim 5
Dependent Claim
13 words
The innoculating dart of claim 1 wherein said biasing means are rubber bands.
Claim 6
Dependent Claim
27 words
The innoculating dart of claim 4, wherein said rubber bands are pierced through said tubular needle and extend rearwardly therefrom over the back end of said plunger.
Claim 7
Dependent Claim
65 words
The innoculating dart of claim 1 in combination with an innoculating dart blow gun having an interior bore, wherein said power head sealer is comprised of a forward extending pin portion and a sealing head mounted to said pin portion, said sealing head having a diameter generally equal to the interior bore diameter of said blow gun through which said dart is to be expelled.
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) | 1981-10-23 | 1982-04-24 | 1982-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-23 | 1986-04-24 | 1986-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-23 | 1990-04-24 | 1990-10-24 | $7700.00 | Window Closed / Lapsed |