Patent US4327747A successfully refreshed from Google Patents.
Patent US3561443A successfully refreshed from Google Patents.
US3561443A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inoculator gun with delayed action
Assignee: Individual
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Filing: 1968-09-06
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Granted: 1971-02-09
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Expires: 1988-09-06
Abstract
Abstract An improvement in gas-operated inoculator guns which ensures correct operating pressure for the gun and hence a correct penetrating pressure for the inoculant. The pressure-producing piston is held back by a spring-pressed latch which is released by a plunger operated by the pressure of the gas behind the piston. The spring pressure is adjustable so that the gas pressure at which the piston is released can thereby be varied. This in turn makes it possible to adjust the pressure at which the inoculant is introduced under the skin. The latch prevents operation of the gun when insufficient pressure is available for a satisfactory inoculation.
Inventors
- 👤 Oscar H Banker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:02
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/178; A61M5/30
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
126 words
In combination a pressure fluid operated device comprising a housing forming a cylinder, a piston in said cylinder adapted to perform work, an abutment rigidly connected to said piston, a trigger pivoted on said housing and adapted to cooperate with said abutment to hold or release said abutment, a source of gas under pressure for moving the piston in one direction, means forming a passageway connecting the gas source with the cylinder on one side of said piston to move said piston in said one direction, a valve in the passageway and controlling passage of gas therethrough, and means operated by the pressure of gas under predetermined unit pressure in said cylinder for operating said trigger to release said trigger and said abutment on said piston.
Claim 2
Dependent Claim
126 words
In combination a pressure fluid operated device comprising a housing forming a cylinder, a piston in said cylinder adapted to perform work, an abutment rigidly connected to said piston, a trigger pivoted on said housing and adapted to cooperate with said abutment to hold or release said abutment, a source of gas under pressure for moving the piston in one direction, means forming a passageway connecting the gas source with the cylinder on one side of said piston to move said piston in said one direction, a valve in the passageway and controlling passage of gas therethrough, and means operated by the pressure of gas under predetermined unit pressure in said cylinder for operating said trigger to release said trigger and said abutment on said piston.
Claim 3
Dependent Claim
36 words
The combination described in claim 1, said abutment comprising a rod secured to said piston and extending through the housing to the exterior thereof, and a radially disposed face on said rod cooperable with said trigger.
Claim 4
Dependent Claim
60 words
The combination described in claim 2, there being a return spring in the cylinder to move the piston and rod in the opposite direction to said one direction, an abutment on the trigger, engageable by said rod for reversing the movement of the trigger upon movement of said piston, and rod in the opposite direction, whereby to reset the trigger.
Claim 5
Dependent Claim
44 words
The combination described in claim 1, said means operated by the presence of gas under predetermined pressure including a shutoff valve, and means movable with the piston for operating said shutoff valve whereby to fix the quantity of gas under pressure in the cylinder.
Claim 6
Dependent Claim
91 words
The combination described in claim 1, said means operated by the presence of gas under predetermined pressure comprising a plunger in the housing and exposed on one side to the pressure of the gas in the housing, a pivoted latch bearing against the other side of said plunger, a spring bearing against said latch to hold it against said plunger, said trigger adapted to be held in one position by said latch, said trigger in its latch-held position providing an abutment against which the abutment connected to said piston may bear.
Claim 7
Dependent Claim
36 words
The combination described in claim 5, and means for adjusting the pressure of the spring against the latch, whereby to adjust the unit pressure of the gas at which the latch is operated by the plunger.
Claim 8
Dependent Claim
74 words
The combination described in claim 5, said spring comprising a leaf spring, a plate secured to the housing, said spring having its end hooked around said plate, aligned openings in the hooked end and in the plate, said opening in the plate being threaded, and a thumbscrew in the openings and bearing against the spring to adjust the pressure of the spring against the latch, said thumbscrew also holding the spring on the plate.
Claim 9
Dependent Claim
49 words
The combination described in claim 5, said means operated by the pressure of gas under predetermined pressure including a shutoff valve disposed in the plunger, and means movable with the work piston for operating said shutoff valve, whereby to fix the quantity of fluid under pressure in the cylinder.
Claim 10
Dependent Claim
21 words
The combination described in claim 1, and means interposed between said housing and said trigger to retard movement of said trigGer.
Claim 11
Dependent Claim
82 words
The combination described in claim 1, said housing comprising a U-shaped bracket, said trigger being pivoted between the sides of the ''''U,'''' a recess in the side of the trigger adjacent one of the sides of the bracket, and a ball and a spring in said recess, said spring pressing the ball against one side of the ''''U'''' and the trigger against the other side of the ''''U'''' to create friction forces to retard movement of said trigger relative to said bracket.
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) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |