Patent US3637331A successfully refreshed from Google Patents.
US3637331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-contained pumping unit
Assignee: Studebaker Worthington Inc
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Filing: 1970-06-01
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Granted: 1972-01-25
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Expires: 1990-06-01
Abstract
Abstract A self-contained pumping unit, fabricated primarily from plastic materials, has pump apparatus and filter apparatus formed as integral parts of a single structure. The self-contained pumping unit includes a base member which communicates the pump apparatus to the filter apparatus. Additionally, the base member incorporates a mount for the pump drive motor and a pump discharge conduit. The relative positioning of the filter apparatus to the pump base member and other structural features of the unit provide the unit with self-venting, self-draining, and self-priming characteristics. The design of the pumping unit allows for the fabrication of the structure by modern plastic molding techniques, thereby allowing the use of noncorroding and chemically inactive materials in all the surfaces of the structure which are to be exposed to the liquid to be pumped. A special design is used to mate the individually molded parts of the pumping unit to form a single structure having high strength and rigidity.
Inventors
- 👤 Wilbur C Smith
- 👤 Philip Joseph Nagengast
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:40
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/02; F04D29/026; F04D29/40; F04D29/42; F04D29/426; F04D29/4273; F04D9/00; F04D9/02; F05; F05D; F05D2300/00; F05D2300/40; F05D2300/43
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
143 words
A pump unit comprising: a base member; filter means connected to said base member having an inlet and having an outlet in said base member; pump means connected to said base member having a discharge and having an inlet in said base member; drive means for said pump means supported at least partially by said base member; and passage means in said base member communicating said outlet of said filter means with said inlet of said pump means; said base member is disposed in a generally horizontal plane; said outlet of said filter means is disposed below said inlet of said filter means; said pump means includes impeller means rotating in a plane substantially parallel to said base member; and said drive means are connected to said impeller means and disposed perpendicular to and above said plane of rotation of said impeller means.
Claim 2
Dependent Claim
143 words
A pump unit comprising: a base member; filter means connected to said base member having an inlet and having an outlet in said base member; pump means connected to said base member having a discharge and having an inlet in said base member; drive means for said pump means supported at least partially by said base member; and passage means in said base member communicating said outlet of said filter means with said inlet of said pump means; said base member is disposed in a generally horizontal plane; said outlet of said filter means is disposed below said inlet of said filter means; said pump means includes impeller means rotating in a plane substantially parallel to said base member; and said drive means are connected to said impeller means and disposed perpendicular to and above said plane of rotation of said impeller means.
Claim 3
Dependent Claim
48 words
The invention claimed in claim No. 1 wherein said filter means comprises: a filter housing having an outlet communicating with said base member; an inlet opening in said housing; and filter element means disposed between said inlet opening and said outlet opening and extending into said base member.
Claim 4
Dependent Claim
122 words
The invention claimed in claim No. 2, wherein: said filter housing includes: a generally horizontal mounting flange projecting inward from the walls of said filter housing; and a generally vertical guide rail projecting inward from the walls of said filter housing; and said filter element means includes: a mounting lip extending from said filter element means adapted to engage said mounting flange to support said filter element; and a guide groove in said mounting lip adapted to coact with said guide rail to allow removal of said filter element means from said filter housing when said guide groove and rail are in alignment and to prevent removal of said filter element means when said guide groove and rail are out of alignment.
Claim 5
Dependent Claim
64 words
The invention claimed in claim No. 2 wherein said inlet opening in said housing is disposed above said filter element means; and further comprising closure means in said filter housing including: a cover threadably connected to said filter housing at the upper portion thereof; and seal means coacting with said cover and said upper portion of said filter housing to seal said filter housing.
Claim 6
Dependent Claim
19 words
The invention claimed in claim No. 1 wherein said base member includes drain means communicating with said passage means.
Claim 7
Dependent Claim
40 words
The invention claimed in claim No. 5 wherein the lowest portion of said passage means is disposed proximate said filter housing outlet in said base member; and said drain means are disposed at the lowest portion of said passage means.
Claim 8
Dependent Claim
57 words
The invention claimed in claim No. 1 wherein said pump means include: a centrifugal flow impeller having an inlet section and an outlet section; a pump casing having an outlet section and a vertically disposed inlet; and diffuser means disposed between said outlet section of said centrifugal flow impeller and said outlet section of said pump casing.
Claim 9
Dependent Claim
65 words
The invention claimed in claim No. 7 wherein: said filter means include a filter housing connected to and extending above said base member; and further comprising: generally veRtically disposed discharge conduit means connected to said outlet section of said pump casing and extending above said base member; and bracing means connecting said filter housing and said discharge conduit to support said generally vertical discharge conduit.
Claim 10
Dependent Claim
74 words
The invention claimed in claim No. 8 wherein: said filter housing has an inlet disposed above said base member; and said pump impeller is disposed to rotate below the level of said inlet in said filter housing and below the end of said vertically disposed discharge conduit, so that liquid to be pumped will tend to remain in said pump casing during periods of nonoperation to augment the self-priming characteristic of said pump means.
Claim 11
Dependent Claim
32 words
The invention claimed in claim No. 7 wherein: said centrifugal impeller has a front shroud and a rear shroud; and said front shroud extends proximate said passage means in said base member.
Claim 12
Dependent Claim
56 words
The invention claimed in claim 1 and further comprising: a pump casing having an inlet and an outlet; a diffuser disposed in said casing about said impeller means; said diffuser and said pump casing forming an annular collection chamber in said pump casing; and drain means communicating said collection chamber with midinlet of said pump casing.
Claim 13
Dependent Claim
28 words
The invention claimed in claim 11 wherein said pump casing is formed from at least two mating members disposed in vertical relation to each other and bonded together.
Claim 14
Dependent Claim
136 words
A pump unit comprising: a base member; filter means connected to said base member having an inlet and having an outlet in said base member; pump means connected to said base member having a discharge and having an inlet in said base member; drive means for said pump means supported at least partially by said base member; and passage means in said base member communicating said outlet of said filter means with said inlet of said pump means; wherein said base member comprises: a bottom member; an intermediate member adjacent said bottom member; an upper member adjacent said intermediate member; each of said member constructed to mate with said adjacent member to form a continuous structure; and fastening means operatively associated with said members, adapted to facilitate the alignment and chemical fastening of said adjacent members.
Claim 15
Dependent Claim
136 words
A pump unit comprising: a base member; filter means connected to said base member having an inlet and having an outlet in said base member; pump means connected to said base member having a discharge and having an inlet in said base member; drive means for said pump means supported at least partially by said base member; and passage means in said base member communicating said outlet of said filter means with said inlet of said pump means; wherein said base member comprises: a bottom member; an intermediate member adjacent said bottom member; an upper member adjacent said intermediate member; each of said member constructed to mate with said adjacent member to form a continuous structure; and fastening means operatively associated with said members, adapted to facilitate the alignment and chemical fastening of said adjacent members.
Claim 16
Dependent Claim
21 words
The invention claimed in claim No. 13 wherein said fastening means comprise mating tongue and groove surfaces on said adjacent members.
Claim 17
Dependent Claim
32 words
The invention claimed in claim No. 14 wherein said grooved surfaces include a plurality of positioning nibs extending into said groove, to position said tongued surface with relation to said grooved surface.
Claim 18
Dependent Claim
40 words
The invention claimed in claim No. 13 wherein said upper member and said intermediate member, in assembled position, comprise: a pump casing having an outlet section and a vertically disposed inlet; and a filter housing extending above said pump casing.
Claim 19
Dependent Claim
33 words
The invention claimed in claim No. 16 wherein said upper member comprises: a generally vertically disposed discharge conduit for said pump means; and support means connecting said discharge conduit to said filter housing.
Claim 20
Dependent Claim
90 words
The invention claimed in claim No. 13 wherein said pump means comprise: a pump casing formed from said upper and intermediate members in assembled position, said pump casing having an inlet and an outlet; a centrifugal impeller rotatively disposed in said pump casing; casing passage means in the top of said casing, said passage means large enough to remove said impeller from said casing; casing cover means for said casing passage means; and shaft means extending through said casing cover means and connected to said impeller to drive said impeller.
Claim 21
Dependent Claim
48 words
The invention claimed in claim No. 18 further comprising: a diffuser disposed in said casing about said centrifugal impeller; said diffuser and said pump caSing forming an annular collection chamber in said pump casing; and drain means communicating said collection chamber with said inlet of said pump casing.
Claim 22
Dependent Claim
59 words
The invention claimed in claim No. 19 wherein said drain means communicating said collection chamber with said inlet of said pump comprises: diffuser positioning means operatively associated with said diffuser and said intermediate member; and at least one drain passage between said diffuser and said intermediate member extending from said collection chamber to the inlet of said pump casing.
Claim 23
Dependent Claim
36 words
The invention claimed in claim No. 20 wherein: said diffuser positioning means is formed in said intermediate member; and said drain passage is a groove in said intermediate member and extending through said diffuser positioning means.
Claim 24
Dependent Claim
134 words
The invention claimed in claim No. 20 further comprising entrapped gas eliminating means comprising: a rear shroud on said impeller; a rear impeller chamber in said pump casing disposed between said rear shroud of said centrifugal impeller and said casing cover means; balancing passage means in said rear shroud of said centrifugal impeller communicating said rear impeller chamber with the inlet portion of said impeller; and vent passage means communicating the upper portion of said collection chamber with said rear impeller chamber so that liquid discharged into said collection chamber will circulate from said collection chamber to said rear impeller chamber to force gases in said collection and said rear impeller through said balancing passage means into said centrifugal impeller where the gases will be carried off with the liquid passing through said impeller.
Claim 25
Dependent Claim
21 words
The invention claimed in claim No. 22 wherein said vent passage means are disposed between said diffuser and said upper member.
Claim 26
Dependent Claim
22 words
The invention claimed in claim No. 23 wherein said vent passage means comprise a channel in the upper surface of said diffuser.
Claim 27
Dependent Claim
92 words
The invention claimed in claim No. 22 further comprising: a cylindrical section extending from said rear shroud of said impeller into said rear impeller chamber to rotate in said rear impeller chamber; a stationary cylindrical section extending from said casing cover means into rear impeller chamber disposed concentrically with relation to said rotating cylindrical section to separate said rear impeller chamber into rear shroud discharging chamber and seal chamber; and said rotatable and said stationary cylindrical sections coacting to impede fluid flow between said rear shroud discharge chamber and said seal chamber.
Claim 28
Dependent Claim
45 words
The invention claimed in claim No. 18 further comprising: motor means operatively connected to said shaft means to drive said impeller; and motor mounting means connecting said motor means to said base member to operatively support and position said motor to drive said pump means.
Claim 29
Dependent Claim
43 words
The invention claimed in claim No. 26 wherein: said casing cover means include said motor mounting means; and further comprising positioning means on said pump casing and said casing cover, coacting to align said motor mounting means with relation to said pump casing.
Claim 30
Dependent Claim
58 words
The invention claimed in claim No. 27 further comprising means to position said motor means, including: an aligning lip on the face of said motor means adjacent said pump casing; and positioning surface means extending from said motor mounting means to coact with said aligning lip to position said motor means with relation to said motor mounting means.
Claim 31
Dependent Claim
58 words
The invention claimed in claim 22 wherein: said drain means include a front shroud discharge chamber adjacent said impeller and communicating said pump casing; and said front shroud chamber is adapted to pass relatively gas-free liquid from said collection chamber to said front shroud chamber and back into said impeller inlet to provide said pump with self-priming characteristics.
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) | 1975-01-24 | 1975-07-26 | 1976-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-24 | 1979-07-26 | 1980-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-24 | 1983-07-26 | 1984-01-25 | $7700.00 | Window Closed / Lapsed |