US3726486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grinder pump
Assignee: ECOLOGY ENG AND Mfg Inc
•
Filing: 1971-01-07
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Granted: 1973-04-10
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Expires: 1991-01-07
Abstract
Abstract The functions of shredding and grinding have been separated from the pumping action of the grinding pump by utilizing two separate rotor sections attached to a common driving shaft. The first rotor contains a combination shearing plate and ripping bars which provide the functions of ripping the raw material and shredding this material into a discharge cavity. The end portions of the bars more efficiently rip the raw material without second rotor section contains a pumping member in the form of an impeller which is caused to rotate in a separate pumping cavity. The impeller causes a vacuum in the discharge cavity area which pulls the shredded material into the pumping cavity for discharge.
Inventors
- 👤 A Smith
- 👤 E Baggenstoss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:03
CPC Classifications
B; B02; B02C; B02C18/00; B02C18/0084; B02C18/0092
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
174 words
A grinder pump defining a fluid flow path therethrough, comprising: a stationary housing containing a reversible annular cutting ring having a diameter that is less than the inside diameter of said housing, said cutting ring having inwardly projecting cutting teeth shaped symmetrically relative to radii therethrough; a shaft located centrally within said housing; a combination of ripping bars and shearing plate fixedly attached to said shaft; the ripping bar portion having a reduced diameter for rotating within the inner diameter of said cutting ring; the shearing plate being located on the downstream side of the cutting ring and having portions of a diameter larger than said cutting ring; the housing portion surrounding the shearing plate defining a discharge cavity, and a separate pump member fixedly attached to said shaft and located within a pump cavity formed by the housing and having an inlet communicating with said discharge cavity adjacent said shaft; the pump cavity accepting the discharge from said discharge cavity at said inlet and discharging or pumping the fluid flow at another point.
Claim 2
Dependent Claim
174 words
A grinder pump defining a fluid flow path therethrough, comprising: a stationary housing containing a reversible annular cutting ring having a diameter that is less than the inside diameter of said housing, said cutting ring having inwardly projecting cutting teeth shaped symmetrically relative to radii therethrough; a shaft located centrally within said housing; a combination of ripping bars and shearing plate fixedly attached to said shaft; the ripping bar portion having a reduced diameter for rotating within the inner diameter of said cutting ring; the shearing plate being located on the downstream side of the cutting ring and having portions of a diameter larger than said cutting ring; the housing portion surrounding the shearing plate defining a discharge cavity, and a separate pump member fixedly attached to said shaft and located within a pump cavity formed by the housing and having an inlet communicating with said discharge cavity adjacent said shaft; the pump cavity accepting the discharge from said discharge cavity at said inlet and discharging or pumping the fluid flow at another point.
Claim 3
Dependent Claim
50 words
A grinder pump according to claim 1 in which said housing is comprised of a first part defining the fluid entry section at one end and which holds the cutting ring at the other end; and a second part defining the discharge cavity and a section of the pumping cavity.
Claim 4
Dependent Claim
34 words
A grinder pump according to claim 1 in which each of said ripping bars has a thickness varying from a minimum at the shaft to a maximum at the radial extremity of the bar.
Claim 5
Dependent Claim
38 words
A grinder pump according to claim 1 in which each of said ripping bars projects into the fluid flow a varying amount ranging from a minimum at the shaft to a maximum at the periphery of said bar.
Claim 6
Dependent Claim
24 words
A grinder pump according to claim 1 in which said cutting ring is comprised of a plurality of identical laminations forming a stacked array.
Claim 7
Dependent Claim
119 words
A grinder pump defining a fluid flow path therethrough, comprising: a stationary housing having an annular cutting ring therein, said cutting ring having inwardly projecting teeth, thereon; a combination ripping bar and shearing plate rotatably mounted in said housing for rotation about the axis of said cutting riNg and having generally radially extending ripping bars rotatable radially inwardly of said cutting ring and having generally planar outer axially elongated end edge surfaces extending generally tangent to said axis, in a circumferential direction, and arranged to define a space between said surfaces and the inner ends of said teeth that converges axially in the direction of fluid flow whereby to minimize clogging of material in the spaces between said teeth.
Claim 8
Dependent Claim
119 words
A grinder pump defining a fluid flow path therethrough, comprising: a stationary housing having an annular cutting ring therein, said cutting ring having inwardly projecting teeth, thereon; a combination ripping bar and shearing plate rotatably mounted in said housing for rotation about the axis of said cutting riNg and having generally radially extending ripping bars rotatable radially inwardly of said cutting ring and having generally planar outer axially elongated end edge surfaces extending generally tangent to said axis, in a circumferential direction, and arranged to define a space between said surfaces and the inner ends of said teeth that converges axially in the direction of fluid flow whereby to minimize clogging of material in the spaces between said teeth.
References Cited (Backward Citations)
US2063996A
Cited
US2484509A
Cited
US2824702A
Cited
US2902227A
Cited
US2853249A
Cited
US2857109A
Cited
US2912176A
Cited
US3013736A
Cited
US3128051A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-09 | 1976-10-09 | 1977-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-09 | 1980-10-09 | 1981-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-09 | 1984-10-09 | 1985-04-10 | $7700.00 | Window Closed / Lapsed |