US3639082A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid metering device having an automatically variable discharge
Assignee: John Deere Technologies International Inc
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Filing: 1970-03-02
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Granted: 1972-02-01
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Expires: 1990-03-02
Abstract
Abstract In a liquid metering device of the type having piston-cylinder assembly connected for receiving pressurized liquid and discharging slugs of the liquid alternately from opposite ends of the cylinder of the piston-cylinder assembly upon reciprocative movement of the piston therein, the improvement comprising a regulating means for automatically controlling the length of travel or stroke of the piston in response to the change in angular velocity of a rotating mechanism. The regulating means includes a valve actuatable by an inertia means which senses the r.p.m. of the rotating mechanism.
Inventors
- 👤 Howard Russell Corwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:39
CPC Classifications
F; F16; F16N; F16N25/00; F16N25/02; F04; F04B; F04B7/00; F04B7/0003; F04B7/0007; F16N27/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
203 words
In a liquid metering device having a double-acting pistoncylinder assembly for receiving pressurized liquid and discharging the same alternately from opposite ends of the cylinder of said piston-cylinder assembly upon reciprocative movement of the piston therein and including a piston-cylinder mechanism having a cylinder adjacent the double-acting pistoncylinder assembly with the piston having a portion thereof extending into the cylinder of said double-acting piston-cylinder assembly to limit the extent of the stroke of the piston of said double-acting piston-cylinder assembly, the improvement comprising: a. passageway means for conducting pressurized fluid to said piston-Cylinder mechanism to urge the piston of the pistoncylinder mechanism in one direction relative to said doubleacting piston-cylinder assembly; b. means for urging said piston-cylinder mechanism in an opposite direction relative to said double-acting pistoncylinder assembly; c. a dump passageway disposed to communicate said passageway means with a point of lower fluid pressure; and d. valve means for simultaneously controlling pressurized fluid flow through said passageway means and said dump passageway in response to the angular velocity of a source of rotary power so as to effect reciprocative movement of said piston of the piston-cylinder mechanism and change the length of the stroke of the piston of the double-acting piston-cylinder assembly.
Claim 2
Dependent Claim
203 words
In a liquid metering device having a double-acting pistoncylinder assembly for receiving pressurized liquid and discharging the same alternately from opposite ends of the cylinder of said piston-cylinder assembly upon reciprocative movement of the piston therein and including a piston-cylinder mechanism having a cylinder adjacent the double-acting pistoncylinder assembly with the piston having a portion thereof extending into the cylinder of said double-acting piston-cylinder assembly to limit the extent of the stroke of the piston of said double-acting piston-cylinder assembly, the improvement comprising: a. passageway means for conducting pressurized fluid to said piston-Cylinder mechanism to urge the piston of the pistoncylinder mechanism in one direction relative to said doubleacting piston-cylinder assembly; b. means for urging said piston-cylinder mechanism in an opposite direction relative to said double-acting pistoncylinder assembly; c. a dump passageway disposed to communicate said passageway means with a point of lower fluid pressure; and d. valve means for simultaneously controlling pressurized fluid flow through said passageway means and said dump passageway in response to the angular velocity of a source of rotary power so as to effect reciprocative movement of said piston of the piston-cylinder mechanism and change the length of the stroke of the piston of the double-acting piston-cylinder assembly.
Claim 3
Dependent Claim
39 words
The apparatus of claim 1, wherein said means for urging the piston of the piston-cylinder mechanism is a spring which biases the piston toward a position allowing the piston of the double-acting piston-cylinder mechanism the maximum length of stroke.
Claim 4
Dependent Claim
27 words
The apparatus of claim 1, wherein said valve means is a spool valve constructed and arranged to reciprocate relative to said passageway means and the dump passageway.
Claim 5
Dependent Claim
228 words
In a liquid metering device having a double-acting piston-cylinder assembly for receiving pressurized liquid and discharging the same alternately from opposite ends of the cylinder of said piston-cylinder assembly upon reciprocative movement of the piston therein, the improvement comprising: a. piston-cylinder mechanism having a cylinder adjacent the double-acting piston-cylinder assembly with the piston having limit means extending into the cylinder of said double-acting piston-cylinder assembly to limit the extent of the reciprocative movement of the piston of the double-acting piston-cylinder assembly; b. passageway means for communicating the cylinder of said piston-cylinder mechanism with a source of pressurized fluid to force the piston of the piston-cylinder mechanism in one direction relative to said double-acting piston-cylinder assembly; c. means for moving said piston of the piston-cylinder mechanism in an opposite direction relative to said double-acting piston-cylinder assembly; and d. a dump passageway disposed to communicate the cylinder of said piston-cylinder mechanism with a point of lower fluid pressure than said source of fluid pressure; and e. a spool valve disposed in said passageway means and dump passageway for reciprocable movement in response to the angular velocity of a source of rotary power for simultaneously controlling flow of fluid through the passageway means and to thereby effect reciprocative movement of said piston of the piston-cylinder mechanism and change the length of the stroke of the piston of the double-acting piston-cylinder assembly.
Claim 6
Dependent Claim
228 words
In a liquid metering device having a double-acting piston-cylinder assembly for receiving pressurized liquid and discharging the same alternately from opposite ends of the cylinder of said piston-cylinder assembly upon reciprocative movement of the piston therein, the improvement comprising: a. piston-cylinder mechanism having a cylinder adjacent the double-acting piston-cylinder assembly with the piston having limit means extending into the cylinder of said double-acting piston-cylinder assembly to limit the extent of the reciprocative movement of the piston of the double-acting piston-cylinder assembly; b. passageway means for communicating the cylinder of said piston-cylinder mechanism with a source of pressurized fluid to force the piston of the piston-cylinder mechanism in one direction relative to said double-acting piston-cylinder assembly; c. means for moving said piston of the piston-cylinder mechanism in an opposite direction relative to said double-acting piston-cylinder assembly; and d. a dump passageway disposed to communicate the cylinder of said piston-cylinder mechanism with a point of lower fluid pressure than said source of fluid pressure; and e. a spool valve disposed in said passageway means and dump passageway for reciprocable movement in response to the angular velocity of a source of rotary power for simultaneously controlling flow of fluid through the passageway means and to thereby effect reciprocative movement of said piston of the piston-cylinder mechanism and change the length of the stroke of the piston of the double-acting piston-cylinder assembly.
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) | 1975-01-31 | 1975-08-02 | 1976-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-31 | 1979-08-02 | 1980-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-31 | 1983-08-02 | 1984-02-01 | $7700.00 | Window Closed / Lapsed |