US3697197A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ice cream pump
Assignee: Waterous Co
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Filing: 1970-08-06
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Granted: 1972-10-10
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Expires: 1990-08-06
Abstract
Abstract A double acting pump is provided for pumping air in one cylinder and liquid mix into another. The cylinders and valve housings, together with the inlet and outlet fittings, are readily separable for cleaning. The entire pump unit may be disassembled for cleaning by the removal of four knobs or nuts.
Inventors
- 👤 Harold A Berglund
- 👤 David F Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:06
CPC Classifications
F; F04; F04B; F04B13/00; F04B13/02; F04B1/00; F04B1/02; F04B53/00; F04B53/10; F04B53/102; F04B53/1022; F04B53/14; F04B53/16; F04B53/162
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
200 words
A readily dismountable pump assembly for use with a pump frame having a base panel and a pair of right angularly extending frame sides thereupon, and including a motor secured to said base panel and having a motor shaft on an axis normal to said base panel, said motor extending from said base panel in a direction opposite to the direction of said frame sides from said base panel, said base panel having an aperture therethrough intermediate said frame sides aligned with said motor shaft and exposing the same, the pump assembly including: a pair of cylinders having open ends, said frame sides having aligned apertures therethrough through which said cylinders extend with the open ends thereof in inner opposed relation, means detachably securing said cylinders to said side plates, pistons slideable in said cylinders, readily detachable piston rod means connecting said pistons for movement in unison, valve housings connected to, and communicating with the outer ends of said cylinders, and including readily removable check valves on either side of the communication with said cylinders, and means on said motor shaft detachably engaged with said piston rod means for reciprocating said piston rod means upon rotation of said motor shaft.
Claim 2
Dependent Claim
200 words
A readily dismountable pump assembly for use with a pump frame having a base panel and a pair of right angularly extending frame sides thereupon, and including a motor secured to said base panel and having a motor shaft on an axis normal to said base panel, said motor extending from said base panel in a direction opposite to the direction of said frame sides from said base panel, said base panel having an aperture therethrough intermediate said frame sides aligned with said motor shaft and exposing the same, the pump assembly including: a pair of cylinders having open ends, said frame sides having aligned apertures therethrough through which said cylinders extend with the open ends thereof in inner opposed relation, means detachably securing said cylinders to said side plates, pistons slideable in said cylinders, readily detachable piston rod means connecting said pistons for movement in unison, valve housings connected to, and communicating with the outer ends of said cylinders, and including readily removable check valves on either side of the communication with said cylinders, and means on said motor shaft detachably engaged with said piston rod means for reciprocating said piston rod means upon rotation of said motor shaft.
Claim 3
Dependent Claim
13 words
The structure of claim 1 and in which said pistons are disc-like bodies.
Claim 4
Dependent Claim
28 words
The structure of claim 2 and including bosses projecting inwardly from the inner surfaces of said disc-like bodies, and said piston rod includes means interengaging with said bosses.
Claim 5
Dependent Claim
27 words
The structure of claim 2 and in which said pistons are peripherally grooved, and including a resilient sealing ring in each of said grooves and projecting therefrom.
Claim 6
Dependent Claim
31 words
The structure of claim 4 and in which each said piston includes a notch in the periphery thereof on one side of said groove providing access to said resilient sealing ring.
Claim 7
Dependent Claim
28 words
The structure of claim 1 and in which said pistons include inwardly projecting bosses, and said piston rod includes right angularly extending means detachably secured to said bosses.
Claim 8
Dependent Claim
31 words
The structure of claim 6 and in which the right angularly extending means on said piston rod comprise spaced fingers, and in which said bosses are grooved to accommodate said fingers.
Claim 9
Dependent Claim
26 words
The structure of claim 1 and in which said valve housings are arranged on substantially vertical axes, and in which said check valves are gravity actuated.
Claim 10
Dependent Claim
23 words
The structure of claim 1 and in which said means detachably securing said cylinders to said side plates include stud and nut means.
Claim 11
Dependent Claim
37 words
The structure of claim 1 and including a pair of yokes extending outwardly from opposite sides of said cylinders, and threaded means forming the means detachably securing said cylinders to said side plates extending through said yokes.
Claim 12
Dependent Claim
33 words
The structure of claim 10 and in which said threaded means include studs projecting in parallel relation outwardly from each said frame sides through said yokes, and including threaded knobs on said studs.
Claim 13
Dependent Claim
43 words
The structure of claim 1 and in which said piston rod includes a central offset portion connected to the remainder thereof along parallel sides and said means on said motor shaft comprises a crank supporting a cylindrical bearing engageable with said parallel sides.
Claim 14
Dependent Claim
12 words
The structure of claim 12 and in which said crank is cylindrical.
Claim 15
Dependent Claim
23 words
The structure of claim 12 and in which said piston rod includes right angularly extending end with which said pistons are detachably engaged.
Claim 16
Dependent Claim
189 words
A pump asSembly for use with a pump frame having a base panel and a pair of parallel right angularly extending frame sides, and including a motor secured to said base panel having a motor shaft on an axis normal to said base panel, said base panel having an aperture aligned with said motor shaft and exposing the same, the pump assembly including: a pair of cylinders having open ends, valve housing connected to other ends of said cylinders and including check valves arranged to control the flow of fluid into and out of said cylinders, said parallel frame sides having aligned apertures through which said cylinders may extend with the open ends thereof innermost, pistons in said cylinders, piston rod means connecting said pistons for movement in unison, means on said motor shaft engageable with said piston rod means for reciprocating the same upon rotation of said motor shaft, inlet and outlet fittings in telescoping relation to said valve housings, and including means on said parallel frame sides for holding said fittings in telescoping relation to said valve housing when said cylinders are extending through said aligned apertures.
Claim 17
Dependent Claim
189 words
A pump asSembly for use with a pump frame having a base panel and a pair of parallel right angularly extending frame sides, and including a motor secured to said base panel having a motor shaft on an axis normal to said base panel, said base panel having an aperture aligned with said motor shaft and exposing the same, the pump assembly including: a pair of cylinders having open ends, valve housing connected to other ends of said cylinders and including check valves arranged to control the flow of fluid into and out of said cylinders, said parallel frame sides having aligned apertures through which said cylinders may extend with the open ends thereof innermost, pistons in said cylinders, piston rod means connecting said pistons for movement in unison, means on said motor shaft engageable with said piston rod means for reciprocating the same upon rotation of said motor shaft, inlet and outlet fittings in telescoping relation to said valve housings, and including means on said parallel frame sides for holding said fittings in telescoping relation to said valve housing when said cylinders are extending through said aligned apertures.
Claim 18
Dependent Claim
21 words
The structure of claim 15 and in which said means on said frame sides comprise vertically spaced yokes engaging said fittings.
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) | 1975-10-10 | 1976-04-10 | 1976-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-10 | 1980-04-10 | 1980-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-10 | 1984-04-10 | 1984-10-10 | $7700.00 | Window Closed / Lapsed |