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US3871268A
Expired / Lapsed
US
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Combination pumping apparatus
Assignee: SHIMAZAKI MIXING EQUIPMENT CO Ltd
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Filing: 1973-07-16
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Granted: 1975-03-18
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Expires: 1993-07-16
Abstract
Abstract A combination pumping apparatus comprising two or more unit pumps each having a driving rod installed at a fixed position; a shiftable supporting point; and a conically movable rod which is supported by said supporting point and connected with each of said driving rods at the opposite sides thereof with respect to said supporting point, thus permitting the opposite ends thereof to revolve about said supporting point so that said opposite sides may conical movements (movements to draw conical loci respectively), whereby the quantities of flow of different kinds of liquids and/or the ratio between flow among said liquids can be varied by shifting said shiftable supporting point and/or changing the conical angles of said conical movements.
Inventors
- 👤 Yusi Misima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:46
CPC Classifications
F; F04; F04B; F04B9/00; F04B9/02; F04B9/04; F04B9/047; F04B1/00; F04B1/02; F04B13/00; F04B13/02; F04B9/045
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
236 words
In a combination pumping apparatus including: I. at least two unit pumps each incluDing a piston rod fixedly arranged parallel with one another to a base; II. a supporting point shiftable perpendicularly with respect to the reciprocation directions of said piston rods of said unit pumps; III. a conically movable rod supported on said supporting point, and connected to each of said piston rods of said unit pumps at each ends thereof; said shiftable supporting point comprising a screw-threaded shaft arranged perpendicular with respect to the reciprocating directions of said piston rods of said unit pumps, a pair of bearings each supporting each of the ends of said screw-threaded shaft, a tapped boss of a hemispherical bearing engaging with said screw-threaded shaft, and a spherical bush supported on said hemispherical bearing; the strokes of said rods of said unit pumps being varied according to the shift of said support point caused by rotating said screw-threaded shaft the improvement characterized in that a disc-shaped crank arm is mounted on one end of an input shaft supported by a bearing secured to said base, and another crank arm is mounted so as to be opposite to said disc-shaped crank arm on a supporting shaft supported by a bearing which is oppositely disposed to said base bearing at a given interval therebetween, and each of said crank arms is connected to a respective end of said conically movable rod.
Claim 2
Dependent Claim
236 words
In a combination pumping apparatus including: I. at least two unit pumps each incluDing a piston rod fixedly arranged parallel with one another to a base; II. a supporting point shiftable perpendicularly with respect to the reciprocation directions of said piston rods of said unit pumps; III. a conically movable rod supported on said supporting point, and connected to each of said piston rods of said unit pumps at each ends thereof; said shiftable supporting point comprising a screw-threaded shaft arranged perpendicular with respect to the reciprocating directions of said piston rods of said unit pumps, a pair of bearings each supporting each of the ends of said screw-threaded shaft, a tapped boss of a hemispherical bearing engaging with said screw-threaded shaft, and a spherical bush supported on said hemispherical bearing; the strokes of said rods of said unit pumps being varied according to the shift of said support point caused by rotating said screw-threaded shaft the improvement characterized in that a disc-shaped crank arm is mounted on one end of an input shaft supported by a bearing secured to said base, and another crank arm is mounted so as to be opposite to said disc-shaped crank arm on a supporting shaft supported by a bearing which is oppositely disposed to said base bearing at a given interval therebetween, and each of said crank arms is connected to a respective end of said conically movable rod.
Claim 3
Dependent Claim
31 words
A combination pumping apparatus, according to claim 1, wherein an elongated narrow groove of constant width is formed radially on each of the insides of said oppositely disposed disc-shaped crank arms.
Claim 4
Dependent Claim
42 words
A combination pumping apparatus, according to claim 2, wherein an engaging disc providing an elongated protrusion having a constant width for being axially movably engaged within each of said grooves is secured to each of the ends of said conically movable rod.
Claim 5
Dependent Claim
30 words
A combination pumping apparatus, according to claim 2, wherein a driving source through a stepless transmission is secured to the other end of said input shaft supported on the bearing.
Claim 6
Dependent Claim
41 words
The pumping apparatus according to claim 1 in which said tapped boss is formed integrally with said supporting point and screw-engaged with said screw-threaded rod, whereby said screw-threaded rod is rotatable to displace said supporting point integral with said tapped boss.
Claim 7
Dependent Claim
25 words
The apparatus according to claim 1 whereby said supporting shaft is connected to a driving source and rotatable in synchronism with said first-mentioned input shaft.
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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) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |