US3837534A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compact, flexible, multiple fluid dispenser
Assignee: Rohe Scientific Corp
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Filing: 1972-10-16
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Granted: 1974-09-24
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Expires: 1992-10-16
Abstract
Abstract A simple compact fluid dispenser, capable of dispensing a plurality of fluids from separate containers, the volume dispensed from each container of the dispenser being independently adjustable over a wide range. In the instrument, a motor rotates a cam causing a slide to move up and then down along a slide post. Attached to the slide post is a fixed clamp capable of holding a plurality of containers in the form of syringes. The plungers of these syringes each rest on a separate movable support. Lift bars are attached to a slide in such a manner that free travel is allowed before they engage and lift the different supports. The extent of free travel can be zero, in which case the slide lifts and lowers the plunger its full traverse. On the other hand, it may be so large that as much as 99 percent of its travel distance is free and only 1 percent of the travel of the lift bar causes the plunger to be raised or lowered. Thus, one plunger may have no free travel and the other have 99 percent free travel, delivering only 1 percent of the volume delivered from the first plunger, on the same stroke of the slide. The movement of the slide is also adjustable. This is done by moving a pivot around, which a connecting bar from the cam to the slide rotates so that it is closer or further from the center of the cam, regulating the diameter of the circle that the bar travels, and thus the maximum thrust of the slide. By means of shims, syringes of different bore may be utilized giving further flexibility to the instrument. The instrument can be used in connection with several types of valve arrangements, including a preferred type of multiple rotary valve.
Inventors
- 👤 S Natelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:20
CPC Classifications
B; B01; B01L; B01L3/00; B01L3/02; B01L3/0289; B01L3/0293; G; G01; G01N; G01N1/00; G01N1/28; G01N1/38; G01N2001/382
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
267 words
In a compact, flexible fluid dispenser for dispensing measured amounts of a plurality of fluids from container barrel (1a, 1b) said fluids being ejected by pushing on a plunger head (3a, 3b) of a plunger, said plunger penetrating said barrel, said plunger head (3a, 3b) protruding out from one end of the barrel, the amount of liquid dispensed being determined by the longitudinal stroke of said plunger reciprocating in said barrel, in combination: a. a post (13) including clamp means thereon for holding at least two container barrels (1a, 1b) in substantially parallel relationship so that plunger heads protruding from barrels held by said clamp means are substantially side by side; b. separate moveable supports (4a, 4b) disposed to engage separate protruding plunger heads; c. separate vertical lift rods (102, 10b) disposed to engage corresponding moveable supports and adjustable longitudinal slots (7a, 7b) associated with each moveable support, said longitudinal slots being in a plane substantially parallel to the plane of said longitudinal plungers, each lift rod being in one slot, said longitudinal slots serving to regulate the vertical movement of the lift rod before the lift rod engages said moveable support; d. slide means (12, 14, 19) connected to said lift rods to raise the lower said lift rods; and, e. a rotating cam (27) and crank means (20, 21, 21a, 21b, 22), said cam having a cam slot (26) therein for adjusting the position of said crank means, said crank means being coupled to said slide means, the position of said crank means in said cam slot determining the stroke of said vertical slide means.
Claim 2
Dependent Claim
267 words
In a compact, flexible fluid dispenser for dispensing measured amounts of a plurality of fluids from container barrel (1a, 1b) said fluids being ejected by pushing on a plunger head (3a, 3b) of a plunger, said plunger penetrating said barrel, said plunger head (3a, 3b) protruding out from one end of the barrel, the amount of liquid dispensed being determined by the longitudinal stroke of said plunger reciprocating in said barrel, in combination: a. a post (13) including clamp means thereon for holding at least two container barrels (1a, 1b) in substantially parallel relationship so that plunger heads protruding from barrels held by said clamp means are substantially side by side; b. separate moveable supports (4a, 4b) disposed to engage separate protruding plunger heads; c. separate vertical lift rods (102, 10b) disposed to engage corresponding moveable supports and adjustable longitudinal slots (7a, 7b) associated with each moveable support, said longitudinal slots being in a plane substantially parallel to the plane of said longitudinal plungers, each lift rod being in one slot, said longitudinal slots serving to regulate the vertical movement of the lift rod before the lift rod engages said moveable support; d. slide means (12, 14, 19) connected to said lift rods to raise the lower said lift rods; and, e. a rotating cam (27) and crank means (20, 21, 21a, 21b, 22), said cam having a cam slot (26) therein for adjusting the position of said crank means, said crank means being coupled to said slide means, the position of said crank means in said cam slot determining the stroke of said vertical slide means.
Claim 3
Dependent Claim
57 words
A dispenser, as claimed in claim 1, wherein said cam slot is substantially radial, an outer axle connected to said slide means, and, an inner axle disposed for radial movement in said slot, a connecting bar connecting said inner and outer axles, and means to fix the radial position of said inner axle in said cam slot.
Claim 4
Dependent Claim
32 words
A dispenser, as claimed in claim 1, said post having upper and lower slides (19, 12), a tie rod connecting said slides, said outer axle being connected to one of said slides.
Claim 5
Dependent Claim
32 words
A dispenser, as claimed in claim 2, said post having upper and lower slides (19, 12), a tie rod connecting said slides, said outer axle being connected to one of said slides.
Claim 6
Dependent Claim
21 words
A dispenser, as claimed in claim 4, said post being a substantially vertical post, said adjustable longitudinal slots being substantially vertical.
Claim 7
Dependent Claim
16 words
A dispenser, as claimed in claim 5, including valve arrangements connected to each barRel other end.
Claim 8
Dependent Claim
26 words
A dispenser, as claimed in claim 6, said valve arrangements being a non-corrosive material for pumping strong corrosive liquids and includes first and second ball valves.
Claim 9
Dependent Claim
18 words
A dispenser, as claimed in claim 6, said valve arrangements including a pair of spring loaded rubber valves.
Claim 10
Dependent Claim
119 words
A dispenser as claimed in claim 6, said valve arrangement including three y-shaped aperture tubes having an aspirating aperture connected to the source of the dispensing fluid, an expelling aperture to dispense said fluid and a third aperture disposed for connection to said barrel other end so that a continuous connection exists between aspirating and expelling aperture to dispense said fluid and a third aperture disposed for connection to said barrel other end so that a continuous connection exists between aspirating and expelling apertures of said tubes and said barrels other end, means for causing sequential pressure along said tubes synchronized with the plunger movements so as to cause a continuous unidirectional pumping action of fluids in said barrels.
Claim 11
Dependent Claim
192 words
A dispenser as claimed in claim 6, said valve arrangements including a. a valve axle rotated by drive means; b. a plurality of cylindrical valves disposed on said valve axle each comprising two outer discs and an inner disc held tightly together by clamp means, the two outer discs being prevented from rotating, a keyway in said center layer to be rotated when said valve axle rotates, and openings in the two outer discs, alignment being maintained between corresponding openings in the two outer discs, the center disc containing only one opening so that on rotation it can form communication between corresponding openings in the outer discs thus resulting in the alternating formation of two fluid passageways; c. connecting means to connect the barrel other end simultaneously with the two openings on the first of the outer discs, separate connecting means for one of the openings of the second outer disc to a receptacle to accept liquid dispensed, and program means for synchronizing the rotation of the valves with that of the plungers so that on the downstroke of the plunger there is communication from the plunger to a dispensing connecting tube.
Claim 12
Dependent Claim
216 words
In a compact, flexible fluid dispenser for dispensing measured amounts of a plurality of fluids from container barrels (1a, 1b) said fluids being ejected by pushing on a plunger head (3a, 3b) of a plunger, said plunger penetrating said barrel, said plunger head (3a, 3b) protruding out from one end of the barrel, the amount of liquid dispensed being determined by the longitudinal stroke of said plunger reciprocating in said barrel, in combination: a. a post (13) including clamp means thereon for holding at least two container barrels (1a, 1b) in substantially parallel relationship so that plunger heads protruding from barrels held by said clamp means are substantially side by side; b. separate moveable supports (4a, 4b) disposed to engage separate protruding plunger heads; c. separate traveling means (10a, 10b) disposed to engage corresponding moveable supports and adjustable travel limit means (7a, 7b) associated with each moveable support, said travel limit means serving to regulate the movement of the traveling means before the traveling means engages said moveable support; d. a rotating cam (27) and crank means coupled to said traveling means, said cam having a cam slot (26) therein for adjusting the position of said crank means, the position of said crank means in said cam slot determining the travel distance of said traveling means.
Claim 13
Dependent Claim
216 words
In a compact, flexible fluid dispenser for dispensing measured amounts of a plurality of fluids from container barrels (1a, 1b) said fluids being ejected by pushing on a plunger head (3a, 3b) of a plunger, said plunger penetrating said barrel, said plunger head (3a, 3b) protruding out from one end of the barrel, the amount of liquid dispensed being determined by the longitudinal stroke of said plunger reciprocating in said barrel, in combination: a. a post (13) including clamp means thereon for holding at least two container barrels (1a, 1b) in substantially parallel relationship so that plunger heads protruding from barrels held by said clamp means are substantially side by side; b. separate moveable supports (4a, 4b) disposed to engage separate protruding plunger heads; c. separate traveling means (10a, 10b) disposed to engage corresponding moveable supports and adjustable travel limit means (7a, 7b) associated with each moveable support, said travel limit means serving to regulate the movement of the traveling means before the traveling means engages said moveable support; d. a rotating cam (27) and crank means coupled to said traveling means, said cam having a cam slot (26) therein for adjusting the position of said crank means, the position of said crank means in said cam slot determining the travel distance of said traveling means.
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) | 1977-09-23 | 1978-03-25 | 1978-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-23 | 1982-03-25 | 1982-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-23 | 1986-03-25 | 1986-09-24 | $7700.00 | Window Closed / Lapsed |