GB790426A - Improvements in or relating to a plastic tap or valve, particularly for glass burettes - Google Patents

Improvements in or relating to a plastic tap or valve, particularly for glass burettes

Info

Publication number
GB790426A
GB790426A GB320755A GB320755A GB790426A GB 790426 A GB790426 A GB 790426A GB 320755 A GB320755 A GB 320755A GB 320755 A GB320755 A GB 320755A GB 790426 A GB790426 A GB 790426A
Authority
GB
United Kingdom
Prior art keywords
tapered
polythene
bores
valve
glass
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB320755A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
RAYMOND BARRINGTON BROCK
Townson & Mercer Ltd
Original Assignee
RAYMOND BARRINGTON BROCK
Townson & Mercer Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by RAYMOND BARRINGTON BROCK, Townson & Mercer Ltd filed Critical RAYMOND BARRINGTON BROCK
Priority to GB320755A priority Critical patent/GB790426A/en
Publication of GB790426A publication Critical patent/GB790426A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
    • B01L3/02—Burettes; Pipettes
    • B01L3/0203—Burettes, i.e. for withdrawing and redistributing liquids through different conduits

Abstract

790,426. Valves. TOWNSON & MERCER, Ltd., and BROCK, R. B. Feb. 3, 1956 [Feb. 3, 1955], No. 3207/55. Class 135. The body of a plastic tap or valve includes hollow tapered parts for receiving separate pieces of tubing and a flow passage or passages interconnecting the bores of the tapered parts which is or are controllable in area. In Fig. 1, a polythene valve body 1 has tapered bores 2, 3, receiving corresponding tapered ends of a glass burette tube 11 and jet 12 respectively. Elbow passages 4 interconnecting the bores are controlled by a flexible diaphragm 6 secured in the body by a polythene gland nut 8 and operable by a member 10. The member 10 may be made of polythene or polystyrene. In Fig. 3, body parts 20 are externally tapered to receive the internally tapered ends of glass or plastic tubing.
GB320755A 1955-02-03 1955-02-03 Improvements in or relating to a plastic tap or valve, particularly for glass burettes Expired GB790426A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB320755A GB790426A (en) 1955-02-03 1955-02-03 Improvements in or relating to a plastic tap or valve, particularly for glass burettes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB320755A GB790426A (en) 1955-02-03 1955-02-03 Improvements in or relating to a plastic tap or valve, particularly for glass burettes

Publications (1)

Publication Number Publication Date
GB790426A true GB790426A (en) 1958-02-12

Family

ID=9753970

Family Applications (1)

Application Number Title Priority Date Filing Date
GB320755A Expired GB790426A (en) 1955-02-03 1955-02-03 Improvements in or relating to a plastic tap or valve, particularly for glass burettes

Country Status (1)

Country Link
GB (1) GB790426A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4354660A (en) * 1981-02-02 1982-10-19 Baxter Travenol Laboratories Inc. In-line flow control clamp
EP2128502A2 (en) * 2008-04-30 2009-12-02 Poulten & Graf Ltd Stopcock for laboratory glassware

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4354660A (en) * 1981-02-02 1982-10-19 Baxter Travenol Laboratories Inc. In-line flow control clamp
EP2128502A2 (en) * 2008-04-30 2009-12-02 Poulten & Graf Ltd Stopcock for laboratory glassware
EP2128502A3 (en) * 2008-04-30 2010-02-17 Poulten & Graf Ltd Stopcock for laboratory glassware

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