Patent US3940308A successfully refreshed from Google Patents.
US3940308A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Suction pipe with quick disconnect cover
Assignee: Appleton Specialty Products Inc
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Filing: 1974-06-07
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Granted: 1976-02-24
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Expires: 1994-06-07
Abstract
Abstract A suction pipe for a paper machine having a tapered seat and a cover and an insert mounted in the seat to provide an air tight seal therewith. The insert and the cover being laterally removable from the seat after sufficient longitudinal travel of the cover to free the insert in the seat.
Inventors
- 👤 Phillip E. Blanchfield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:05
CPC Classifications
D; D21; D21F; D21F1/00; D21F1/48; D21F1/52; D21F1/523
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
159 words
A suction pipe for a paper machine comprising: a. a pipe adapted to be connected to a vacuum means, said pipe having a longitudinally extending dovetail seat that is tapered in the longitudinal direction from one end of the seat to the other and slots therethrough extending into the interior of said pipe; b. a cover having a tapered configuration complementary to the tapered configuration of said seat and mounted in said seat, said cover having passages therethrough aligned with said slots for conducting a liquid into said pipe; and c. an insert located between said cover and said pipe in said seat and providing an air tight seal with said pipe and cover, said insert having a portion extending above said seat, said insert being laterally removable from said seat upon longitudinal movement of said cover in said seat away from said air tight position to free said insert, said cover thereby being laterally removable from said seat.
Claim 2
Dependent Claim
159 words
A suction pipe for a paper machine comprising: a. a pipe adapted to be connected to a vacuum means, said pipe having a longitudinally extending dovetail seat that is tapered in the longitudinal direction from one end of the seat to the other and slots therethrough extending into the interior of said pipe; b. a cover having a tapered configuration complementary to the tapered configuration of said seat and mounted in said seat, said cover having passages therethrough aligned with said slots for conducting a liquid into said pipe; and c. an insert located between said cover and said pipe in said seat and providing an air tight seal with said pipe and cover, said insert having a portion extending above said seat, said insert being laterally removable from said seat upon longitudinal movement of said cover in said seat away from said air tight position to free said insert, said cover thereby being laterally removable from said seat.
Claim 3
Dependent Claim
23 words
The pipe of claim 1 in which said insert portion has means engageable by motive means for removing said insert from said seat.
Claim 4
Dependent Claim
19 words
The pipe of claim 2 in which said means engageable by motive means is a plurality of spaced holes.
Claim 5
Dependent Claim
41 words
The pipe of claim 3 in which said cover has a surface adjacent to said insert which extends above said insert to provide clearance for the removal of said insert from said seat and said insert is a metallic flexible strip.
Claim 6
Dependent Claim
43 words
The pipe of claim 4 in which said insert comprises a plurality of segments aligned end to end and having a rectangular and longitudinally extending configuration and further comprising means connected to said pipe for supporting said segments when not in said seat.
Claim 7
Dependent Claim
29 words
The pipe of claim 5 in which said segments are made of stainless steel and said cover is made of polyethylene and said seat is made of stainless steel.
References Cited (Backward Citations)
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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) | 1979-02-23 | 1979-08-25 | 1980-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-23 | 1983-08-25 | 1984-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-23 | 1987-08-25 | 1988-02-24 | $7700.00 | Window Closed / Lapsed |