US3610783A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metering devices
Assignee: Individual
•
Filing: 1969-11-07
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Granted: 1971-10-05
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Expires: 1989-11-07
Abstract
Abstract A metering device for delivering two or more materials in predetermined ratios and at predetermined rates, which is unaffected by changes in viscosity and operating pressure. The device comprising a positive displacement delivery pump for each material, an hydraulic ram for driving the said delivery pumps at predetermined relative speeds, and a variable delivery hydraulic pump for driving the ram at a predetermined speed. In the case when two delivery pumps are provided they may be connected by a rocking member having a variable fulcrum to vary the relative speeds of the delivery pumps.
Inventors
- 👤 Antony Harry Croucher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:38
CPC Classifications
G; G05; G05D; G05D11/00; G05D11/02; G05D11/13; G05D11/131; G05D11/132; F; F04; F04B; F04B13/00; F04B13/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
131 words
In a metering device for delivering at least two materials in a predetermined ratio and at predetermined rates: the improvement which comprises, a separate positive displacement delivery pump for each respective one of at least two materials to be delivered in predetermined volume ratios and at predetermined rates, a rockable member operably connecting the delivery pumps, means defining a fulcrum for the rockable member means connected to the said means defining the fulcrum for varying the position of the fulcrum to vary the relative speeds of the delivery pumps, a hydraulic ram driving the delivery pumps at relative speeds determined by the position of the fulcrum, a variable delivery hydraulic pump for driving the ram at a predetermined speed, and conduit means connecting the variable delivery pump to said hydraulic ram.
Claim 2
Dependent Claim
131 words
In a metering device for delivering at least two materials in a predetermined ratio and at predetermined rates: the improvement which comprises, a separate positive displacement delivery pump for each respective one of at least two materials to be delivered in predetermined volume ratios and at predetermined rates, a rockable member operably connecting the delivery pumps, means defining a fulcrum for the rockable member means connected to the said means defining the fulcrum for varying the position of the fulcrum to vary the relative speeds of the delivery pumps, a hydraulic ram driving the delivery pumps at relative speeds determined by the position of the fulcrum, a variable delivery hydraulic pump for driving the ram at a predetermined speed, and conduit means connecting the variable delivery pump to said hydraulic ram.
Claim 3
Dependent Claim
44 words
In a metering device according to claim 1, in which the first-mentioned pumps comprise two pumps, and including means connecting said first-mentioned pumps to said means defining the fulcrum at fixed positions spaced from each other and disposed on opposite sides of said fulcrum.
Claim 4
Dependent Claim
21 words
In a metering device according to claim 1, manual control means for varying the output of the variable delivery hydraulic pump.
Claim 5
Dependent Claim
22 words
In a metering device according to claim 1, a synchronous electric motor driving said variable delivery hydraulic pump at a constant speed.
Claim 6
Dependent Claim
22 words
In a metering device according to claim 1, means connecting one of the first-mentioned pumps to said ram for conjoint movement therewith.
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) | 1974-10-04 | 1975-04-05 | 1975-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-04 | 1979-04-05 | 1979-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-04 | 1983-04-05 | 1983-10-05 | $7700.00 | Window Closed / Lapsed |