US3646701A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable thermal fogger
Assignee: McGraw Edison Co
•
Filing: 1970-05-04
•
Granted: 1972-03-07
•
Expires: 1990-05-04
Abstract
Abstract A portable thermal insecticide fogger including an internal combustion engine for generating hot exhaust gases that discharge from an outlet, a supply of liquid insecticide, and a diaphragm pump operated off the changing pressures of the internal combustion engine for pumping the liquid insecticide to a location upstream of the outlet for admixture and common discharge with the exhaust gases.
Inventors
- 👤 Arthur Pfaffenbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:44
CPC Classifications
A; A01; A01M; A01M13/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
153 words
A thermal fogger comprising an internal combustion engine having an exhaust manifold and having a pressure line that experiences varying pressures during each cycle of the engine, an outlet tube including a venturi restriction therein, means connecting the exhaust manifold to the outlet tube for exhaust flow through the venturi restriction, a diaphragm pump having an inlet and an outlet and having a pressure connection for powering the pump, an insecticide tank, connecting means between the insecticide tank and the diaphragm pump inlet and between the diaphragm pump outlet and the outlet tube at a location immediately downstream of the venturi restriction, and means connecting the engine pressure line with the diaphragm pump pressure connection, whereby operation of the internal combustion engine pressure powers the diaphragm pump for forcing insecticide to the outlet tube for heating admixture with the exhaust downstream of the venturi restriction and for common discharge from the outlet tube.
Claim 2
Dependent Claim
153 words
A thermal fogger comprising an internal combustion engine having an exhaust manifold and having a pressure line that experiences varying pressures during each cycle of the engine, an outlet tube including a venturi restriction therein, means connecting the exhaust manifold to the outlet tube for exhaust flow through the venturi restriction, a diaphragm pump having an inlet and an outlet and having a pressure connection for powering the pump, an insecticide tank, connecting means between the insecticide tank and the diaphragm pump inlet and between the diaphragm pump outlet and the outlet tube at a location immediately downstream of the venturi restriction, and means connecting the engine pressure line with the diaphragm pump pressure connection, whereby operation of the internal combustion engine pressure powers the diaphragm pump for forcing insecticide to the outlet tube for heating admixture with the exhaust downstream of the venturi restriction and for common discharge from the outlet tube.
Claim 3
Dependent Claim
41 words
A thermal fogger according to claim 1, wherein the internal combustion engine is a two-cycle engine having an intake manifold that experiences varying pressures during each cycle of the engine, and wherein the pressure line is connected to the intake manifold.
Claim 4
Dependent Claim
59 words
A thermal fogger according to claim 1, wherein the internal combustion engine has an output throttle control including a trigger mechanism, wherein a control valve is in the connecting means, and wherein linkage means responsive to the trigger mechanism also opens the control valve as the throttle control is opened such as to increase the output of the engine.
Claim 5
Dependent Claim
41 words
A thermal fogger according to claim 3, wherein the internal combustion engine is a two-cycle engine having an intake manifold that experiences varying pressures during each cycle of the engine, and wherein the pressure line is connected to the intake manifold.
Claim 6
Dependent Claim
18 words
A thermal fogger according to claim 4, wherein the thermal fogger is portable and has a carrying handle.
Claim 7
Dependent Claim
28 words
A thermal fogger according to claim 3, wherein the connecting means control valve has a manual adjustment means to achieve a desired insecticide flow at full output conditions.
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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) | 1975-03-07 | 1975-09-06 | 1976-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-07 | 1979-09-06 | 1980-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-07 | 1983-09-06 | 1984-03-07 | $7700.00 | Window Closed / Lapsed |