Patent US3743101A successfully refreshed from Google Patents.
US3743101A
Expired / Lapsed
US
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Assignee: Individual
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Filing: 1972-04-18
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Granted: 1973-07-03
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Expires: 1992-04-18
Abstract
Abstract A pair of removable strainers are mounted in a slide movable to position either strainer in the flow passageway of an extruder. The slide is locked into position by a spherical bulb rotatable in a seating cup and a wedge block intermediate the slide and bulb. The seating cup, bulb and wedge block all include openings alignable with the passageway. Movement of the wedge block to release the wedge engagement between the slide and bulb permits rapid movement of the slide from one position to the other to permit changing of the strainers during continuous operation of the extruder.
Inventors
- 👤 L Schmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:50
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/50; B29C48/69; B29C48/691; B29C48/6912; B29C48/03
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
185 words
A double strainer apparatus for extruders comprising, in combination: a flow passageway in the extruder; a slide movable in guide means across said passageway and having a pair of openings alignable with said passageway; removable straining means receivable in said openings to strain the flow of mass through said passageway; bulb means aligned in said passageway to permit flow through said bulb means in said passageway; a seat means likewise having an opening aligned with said passageway for seating said bulb means to permit rotatable movement of said bulb means in said seat means; and a wedge block positioned intermediate said bulb means and slide, said wedge block likewise having an opening in alignment with said passageway and engageable with said bulb means to provide positive wedge engagement and disengagement between said bulb means and sLide as said wedge block is moved transversely to said passageway, said slide being movable in said guide means when said wedge block is out of wedge engagement with said bulb means and locked in said guide means when said wedge block is in wedge engagement with said bulb means.
Claim 2
Dependent Claim
185 words
A double strainer apparatus for extruders comprising, in combination: a flow passageway in the extruder; a slide movable in guide means across said passageway and having a pair of openings alignable with said passageway; removable straining means receivable in said openings to strain the flow of mass through said passageway; bulb means aligned in said passageway to permit flow through said bulb means in said passageway; a seat means likewise having an opening aligned with said passageway for seating said bulb means to permit rotatable movement of said bulb means in said seat means; and a wedge block positioned intermediate said bulb means and slide, said wedge block likewise having an opening in alignment with said passageway and engageable with said bulb means to provide positive wedge engagement and disengagement between said bulb means and sLide as said wedge block is moved transversely to said passageway, said slide being movable in said guide means when said wedge block is out of wedge engagement with said bulb means and locked in said guide means when said wedge block is in wedge engagement with said bulb means.
Claim 3
Dependent Claim
34 words
The apparatus according to claim 1 wherein the faces of said slide engageable in said guide means are flat to minimize the clearance necessary to permit movement of said slide in said guide means.
Claim 4
Dependent Claim
48 words
The apparatus according to claim 2 wherein said wedge block includes a flat surface and tapered surface, said flat surface being in engagement with one of the surfaces of said slide to form part of said guide means, said tapered surface being in engagement with said bulb means.
Claim 5
Dependent Claim
52 words
The apparatus according to claim 3 wherein said bulb means includes a general spherical shape to permit rotation of said bulb means about the axis of said passageway, said bulb means also being movable so that the axis of said bulb means is movable slightly out of alignment with said passageway axis.
Claim 6
Dependent Claim
38 words
The apparatus according to claim 4 wherein said bulb means includes a flange extending radially relative to the axis of said bulb means, said flange including a flat surface engageable with said tapered surface of said wedge block.
Claim 7
Dependent Claim
145 words
Apparatus for straining mass movable through a flow passageway comprising, in combination: a magazine having at least two openings; straining means mounted in said openings; said magazine being movable to align either of said openings with said passageway to strain flow through one of said straining means and permit replacement or cleaning of said other straining means; guide means for said magazine; and releasable lock means for locking said magazine in one of said positions, said lock means when released permitting movement of said magazine in said guide to the other of said positions, said lock means comprising a wedge block having a flat face engageable with said magazine for clamping said magazine in said guide means and a wedge surface engageable with a self-aligning swivel means for providing said clamping force, said swivel means and wedge block having openings aligned in said flow passageway.
Claim 8
Dependent Claim
145 words
Apparatus for straining mass movable through a flow passageway comprising, in combination: a magazine having at least two openings; straining means mounted in said openings; said magazine being movable to align either of said openings with said passageway to strain flow through one of said straining means and permit replacement or cleaning of said other straining means; guide means for said magazine; and releasable lock means for locking said magazine in one of said positions, said lock means when released permitting movement of said magazine in said guide to the other of said positions, said lock means comprising a wedge block having a flat face engageable with said magazine for clamping said magazine in said guide means and a wedge surface engageable with a self-aligning swivel means for providing said clamping force, said swivel means and wedge block having openings aligned in said flow passageway.
Claim 9
Dependent Claim
141 words
Apparatus according to claim 6 wherein said apparatus further includes a pair of spaced mounting plates for spacing said apparatus in said flow passageway, said magazine being sandwiched intermediate said mounting plates and having an elongated flat plate configuration, one of the sides of said magazine being slidably engaged with the face of one of said mounting plates and the other side being slidably engaged with said flat face of said wedge block, said wedge block and said mounting plate forming said guide means; said other of said mounting plates including a seat means for holding said swivel means, said swivel means comprising a truncated bulb movable in said seat means for rotation about the axis of said flow passageway and further rotation whereby the axis of said bulb opening is out of alignment with the axis of said flow passageway.
Claim 10
Dependent Claim
132 words
Apparatus according to claim 7 wherein said bulb and seat include matching spherical surfaces in engagement with each other, said bulb including a flange having a flat face engageable with the wedge surface of said wedge block so that when said wedge block is moved into wedging engagement with said bulb, said magazine is clamped intermediate said wedge block and said mounting plate to prevent leakage of mass flow through said flow passageway, and when said wedge block is moved slightly away from wedging engagement with said bulb, said magazine is movable intermediate said wedge block and said mounting plate, the clearance therebetween being substantially small enough to inhibit leakage of said mass flow therebetween as said magazine is moved to position the other of said strainer means in said flow passageway.
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) | 1976-07-02 | 1977-01-01 | 1977-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-02 | 1981-01-01 | 1981-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-02 | 1985-01-01 | 1985-07-03 | $7700.00 | Window Closed / Lapsed |