US3737073A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for proportionally dosing a plurality of liquids
Assignee: Individual
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Filing: 1972-01-31
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Granted: 1973-06-05
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Expires: 1992-01-31
Abstract
Abstract A proportionating dosing device has two pairs of pistons, each pair being mounted on the respective ends of a common piston rod. The piston rods are parallel and are coupled for movement in opposite directions by a two-armed lever whose fulcrum may be shifted to vary the ratio of the arms and thereby of the respective strokes of the piston pairs. The two cylinders receiving the pistons of each pair are connected with a common intake nipple and a common discharge nipple and controlled by pneumatically actuated valves, the pneumatic valve actuating circuits including conduits blocked and opened by the moving piston rods in proper sequence. Because of the wide available ratio of liquid discharge rates, the apparatus is suitable for metering resin compositions and curing agents for the same to an injection molding machine.
Inventors
- 👤 R Lupert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:56
CPC Classifications
G; G01; G01F; G01F11/00; G01F11/02; G01F11/021; B; B01; B01F; B01F35/00; B01F35/80; B01F35/88; B01F35/882; B01F35/8822; B01F35/88222; G11; G11B; G11B3/00; G11B3/68; G11B3/70; G11B3/705; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2514; Y10T137/2516
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
343 words
An apparatus for proportionally dosing a plurality of liquids comprising, in combination: a. housing means defining four cylinders; b. four pistons respectively received in said cylinders, said pistons constituting a first pair and a second pair of pistons; c. a piston rod connecting the pistons of each pair for simultaneous movement between respective terminal positions of said pistons in the respective cylinders, each piston rod and the pistons connected thereby constituting a piston assembly, 1. each cylinder being provided with an intake opening and a discharge opening, 2. one piston of each pair moving toward said openings of the associated cylinder while the other piston of said pair moves away from the openings provided for the cylinder receiving said other piston; d. linkage means coupling said piston assemblies for moving the pistons of each pair a first distance in the associated cylinders when the pistons of the other pair move a second distance; e. a control valve associated with each cylinder and movable between a first position in which the control valve opens said discharge opening and closes said intake opening, and a secoNd position in which said control valve closes said discharge opening and opens said intake opening; f. pressure-fluid operated valve actuating means for moving each control valve between said two positions thereof; g. a source of pressure fluid; h. supply valve means interposed between said source and said valve actuating means and operatively connected to one of said piston rods for supplying pressure fluid from said source to said valve actuating means and for thereby moving said control valve between said positions thereof in response to said movement of said one piston rod; i. a source of a first liquid connected by the associated control valves with the intake openings of the two cylinders respectively receiving the pistons of said first pair; and j. a source of a second liquid separated from said source of said first liquid and connected by the associated control valves with the intake openings of the two cylinders receiving the pistons of said second pair.
Claim 2
Independent Claim
343 words
An apparatus for proportionally dosing a plurality of liquids comprising, in combination: a. housing means defining four cylinders; b. four pistons respectively received in said cylinders, said pistons constituting a first pair and a second pair of pistons; c. a piston rod connecting the pistons of each pair for simultaneous movement between respective terminal positions of said pistons in the respective cylinders, each piston rod and the pistons connected thereby constituting a piston assembly, 1. each cylinder being provided with an intake opening and a discharge opening, 2. one piston of each pair moving toward said openings of the associated cylinder while the other piston of said pair moves away from the openings provided for the cylinder receiving said other piston; d. linkage means coupling said piston assemblies for moving the pistons of each pair a first distance in the associated cylinders when the pistons of the other pair move a second distance; e. a control valve associated with each cylinder and movable between a first position in which the control valve opens said discharge opening and closes said intake opening, and a secoNd position in which said control valve closes said discharge opening and opens said intake opening; f. pressure-fluid operated valve actuating means for moving each control valve between said two positions thereof; g. a source of pressure fluid; h. supply valve means interposed between said source and said valve actuating means and operatively connected to one of said piston rods for supplying pressure fluid from said source to said valve actuating means and for thereby moving said control valve between said positions thereof in response to said movement of said one piston rod; i. a source of a first liquid connected by the associated control valves with the intake openings of the two cylinders respectively receiving the pistons of said first pair; and j. a source of a second liquid separated from said source of said first liquid and connected by the associated control valves with the intake openings of the two cylinders receiving the pistons of said second pair.
Claim 3
Dependent Claim
41 words
An apparatus as set forth in claim 1, further comprising adjusting means operatively connected to said linkage means for varying said first distance moved by the pistons of each pair when the pistons of the other pair move said second distance.
Claim 4
Dependent Claim
255 words
one piston of each pair moving toward said openings of the associated cylinder while the other piston of said pair moves away from the openings provided for the cylinder receiving said other piston; d. linkage means coupling said piston assemblies for moving the pistons of each pair a first distance in the associated cylinders when the pistons of the other pair move a second distance; e. a control valve associated with each cylinder and movable between a first position in which the control valve opens said discharge opening and closes said intake opening, and a secoNd position in which said control valve closes said discharge opening and opens said intake opening; f. pressure-fluid operated valve actuating means for moving each control valve between said two positions thereof; g. a source of pressure fluid; h. supply valve means interposed between said source and said valve actuating means and operatively connected to one of said piston rods for supplying pressure fluid from said source to said valve actuating means and for thereby moving said control valve between said positions thereof in response to said movement of said one piston rod; i. a source of a first liquid connected by the associated control valves with the intake openings of the two cylinders respectively receiving the pistons of said first pair; and j. a source of a second liquid separated from said source of said first liquid and connected by the associated control valves with the intake openings of the two cylinders receiving the pistons of said second pair.
Claim 5
Dependent Claim
255 words
one piston of each pair moving toward said openings of the associated cylinder while the other piston of said pair moves away from the openings provided for the cylinder receiving said other piston; d. linkage means coupling said piston assemblies for moving the pistons of each pair a first distance in the associated cylinders when the pistons of the other pair move a second distance; e. a control valve associated with each cylinder and movable between a first position in which the control valve opens said discharge opening and closes said intake opening, and a secoNd position in which said control valve closes said discharge opening and opens said intake opening; f. pressure-fluid operated valve actuating means for moving each control valve between said two positions thereof; g. a source of pressure fluid; h. supply valve means interposed between said source and said valve actuating means and operatively connected to one of said piston rods for supplying pressure fluid from said source to said valve actuating means and for thereby moving said control valve between said positions thereof in response to said movement of said one piston rod; i. a source of a first liquid connected by the associated control valves with the intake openings of the two cylinders respectively receiving the pistons of said first pair; and j. a source of a second liquid separated from said source of said first liquid and connected by the associated control valves with the intake openings of the two cylinders receiving the pistons of said second pair.
Claim 6
Dependent Claim
72 words
An apparatus as set forth in claim 1, wherein said piston rods are elongated in a common direction, the pistons of each pair are spaced from each other longitudinally of the associated piston rod, and said linkage means include a fulcrum mounted on said housing means and a lever member pivotally mounted on said fulcrum, respective portions of said lever member spaced from said fulcrum being hingedly connected to said piston rods.
Claim 7
Dependent Claim
62 words
An apparatus as set forth in claim 3, wherein said lever member has two arms extending from said fulcrum in opposite directions and hingedly connected to said piston rods respectively, and said adjusting means include means for varying the ratio of the effective lengths of said arms and for thereby varying the ratio of said first distance and of said second distance.
Claim 8
Dependent Claim
51 words
An apparatus as set forth in claim 3, wherein said lever member is elongated and formed with at least one longitudinally elongated slot, and each of said piston rods carries an engaging member movably received in said at least one slot for hingedly connecting said lever member to said piston rods.
Claim 9
Dependent Claim
43 words
An apparatus as set forth in claim 5, wherein said fulcrum includes a pin member movably received in said at least one slot, and said adjusting means include means for moving said pin member toward and away from one of said piston rods.
Claim 10
Dependent Claim
153 words
An apparatus as set forth in claim 1, wherein said piston rods are elongated in a common direction, and the pistons of each pair are spaced from each other longitudinally of the associated piston rod, the apparatus further comprising two valve housings elongated transversely of said common direction and spaced from each other in said common direction so as to receive said housing means therebetween, each valve housing movably receiving a valve assembly including two of said control valves, said valve actuating means including two valve actuating members respectively fastened in said valve housings to said two control valves and constituting respective elements of the valve assemblies, said two control valves of each valve assembly being associated with cylinders receiving respective pistons of said first and second pairs, each of said two control valves being in said first position thereof when the other control valve is in the second position of the same.
Claim 11
Dependent Claim
89 words
An apparatus as set forth in claim 1, wherein said supply valve means include a conduit transverse to said one piston rod, said one piston rod having a first portion of a cross section greater than the cross section of said conduit and a second portion of a cross section smaller than the cross section of said conduit, said piston rod intersecting said conduit and sealing the same when said first portion thereof engages said conduit while permiTting flow through said conduit when said second portion engages said conduit.
Claim 12
Dependent Claim
30 words
An apparatus as set forth in claim 1, wherein the pistons of each pair have the same cross-section different from the cross section of the pistons of the other pair.
Claim 13
Dependent Claim
67 words
An apparatus as set forth in claim 1, wherein said housing means define a fifth cylinder, one of said piston rods carrying an additional piston received in said fifth cylinder for joint movement therein with the pistons of the pair connected by said one piston rod, and means for supplying a pressure fluid to said fifth cylinder and for thereby urging said one piston rod to move.
References Cited (Backward Citations)
GB807338A
Cited
FR1296540A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-04 | 1976-12-04 | 1977-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-04 | 1980-12-04 | 1981-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-04 | 1984-12-04 | 1985-06-05 | $7700.00 | Window Closed / Lapsed |