Patent US1026429A successfully refreshed from Google Patents.
Patent US3875970A successfully refreshed from Google Patents.
US3875970A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tubing
Assignee: Manostat Corp
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Filing: 1973-09-17
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Granted: 1975-04-08
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Expires: 1993-09-17
Abstract
Abstract A tubing particularly adapted for use in peristaltic pumps; the tubing having an inner tubular portion of a corrosion resistant resin and an outer tubular portion of a resilient elastomeric material, the inner and outer tubular portions coacting to withstand extreme conditions of usage due to the normal repeated alternating compression and expansion of the tubing when the pump is in use.
Inventors
- 👤 John O Fitter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:59
CPC Classifications
F; F04; F04B; F04B43/00; F04B43/12; F04B43/1253; F04B43/0009; F04B43/0054; F04B43/0072; Y; Y10; Y10S; Y10S285/00; Y10S285/911
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
108 words
In combination with a peristaltic pump having a flexible tubular element subject to repeated alternating compression and expansion along the length thereof, wherein the improvement comprises a compressible tubing, said tubing comprising a continuous, thin, smooth-walled inner tubular portion consisting of an inert fluorocarbon resin having a wall thickness of from 0.005 inch to 0.020 inch and a thick outer nonreinforced tubular portion consisting of a resilient elastomeric organopolysiloxane, said outer tubular portion having a wall thickness of from 0.030 inch to 0.125 inch and being operative to restore the compressed inner tubular portion to its normal tubular shape and to thereby avoid creasing said inner tubular portion.
Claim 2
Dependent Claim
108 words
In combination with a peristaltic pump having a flexible tubular element subject to repeated alternating compression and expansion along the length thereof, wherein the improvement comprises a compressible tubing, said tubing comprising a continuous, thin, smooth-walled inner tubular portion consisting of an inert fluorocarbon resin having a wall thickness of from 0.005 inch to 0.020 inch and a thick outer nonreinforced tubular portion consisting of a resilient elastomeric organopolysiloxane, said outer tubular portion having a wall thickness of from 0.030 inch to 0.125 inch and being operative to restore the compressed inner tubular portion to its normal tubular shape and to thereby avoid creasing said inner tubular portion.
Claim 3
Dependent Claim
13 words
The combination as in claim 1 wherein said inner tubular portion is polytetrafluoroethylene.
Claim 4
Dependent Claim
32 words
The combination as in claim 1 wherein the outer tubular portion has a wall thickness of about 0.060 inch and the inner tubular portion has a wall thickness of about 0.015 inch.
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) | 1978-04-07 | 1978-10-07 | 1979-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-07 | 1982-10-07 | 1983-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-07 | 1986-10-07 | 1987-04-08 | $7700.00 | Window Closed / Lapsed |