GB1280236A - A slit seal - Google Patents

A slit seal

Info

Publication number
GB1280236A
GB1280236A GB3831469A GB3831469A GB1280236A GB 1280236 A GB1280236 A GB 1280236A GB 3831469 A GB3831469 A GB 3831469A GB 3831469 A GB3831469 A GB 3831469A GB 1280236 A GB1280236 A GB 1280236A
Authority
GB
United Kingdom
Prior art keywords
pressure
sealing
elements
belt
forces
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
GB3831469A
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.)
Sandco Ltd
Original Assignee
Sandco 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
Priority claimed from CH1155068A external-priority patent/CH497656A/en
Application filed by Sandco Ltd filed Critical Sandco Ltd
Publication of GB1280236A publication Critical patent/GB1280236A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/168—Sealings between relatively-moving surfaces which permits material to be continuously conveyed

Abstract

1280236 Endless conveyers SANDCO Ltd 30 July 1969 [1 Aug 1968 13 May 1968] 38314/69 Heading B8A [Also in Division F2] A seal for sealing a gap provided for the flow of a fluid medium between a fixed part and a movable part such as for sealing the gaps 21 through which a conveyer belt 3 may pass into and out of a pressure chamber 2 comprises a seal element 19 which is movably-mounted on the fixed part and yieldably-urged towards the other by pressure means having a resultant which is directly opposed to the resultant of forces exerted on the seal element by fluid flowing under pressure through the gap. As shown, the conveyer belt 3 passes through a pressure chamber 2 supplied with gas from a source 18, the gas pressure tending to lift the seal element 19 being opposed by springs 16 which are off-set so as to balance the forces and maintain the seal element parallel to the belt. In a second embodiment, Figs. 3 and 4 (not shown), sealing elements (26) are provided one on each side of the belt (22) which in this case consists of two separate belts with the material to be treated between them. The sealing elements are mounted on plungers (27) which are urged towards the belt by the gas pressure until the pressure in the sealing gaps are balanced by the plunger pressures; alternatively the plungers may be operated by a pressure source which is independent of the pressure chamber. In Figs. 5 and 6 (not shown), the sealing elements are resiliently-mounted and urged towards the belt by the gas pressure, the elements being extended axially on the side remote from the pressure chamber so that the forces on each side of the elements balance and maintain the elements parallel to the belt. In Fig. 7, the sealing elements 50 are each mounted by a pair of flexible tubes filled with a pressure medium which exert a force F R . The opposing forces F P produced in the sealing gaps 55 set up torques M and the elements are maintained parallel by means of lever arms 60 supported at their free ends by pneumatic cushion devices; alternatively, each sealing element may be mounted by a pair of flexible tubes one being filled at a pressure higher than the other so as to maintain the element parallel.
GB3831469A 1968-08-01 1969-07-30 A slit seal Expired GB1280236A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1155068A CH497656A (en) 1968-08-01 1968-08-01 Sealing device intended to oppose the passage of a pressurized fluid between two elements, one of which moves opposite the other
CH732769A CH512026A (en) 1968-08-01 1969-05-13 Sealing device

Publications (1)

Publication Number Publication Date
GB1280236A true GB1280236A (en) 1972-07-05

Family

ID=25701127

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3831469A Expired GB1280236A (en) 1968-08-01 1969-07-30 A slit seal

Country Status (9)

Country Link
BE (1) BE736857A (en)
CH (1) CH512026A (en)
DE (1) DE1937247C3 (en)
FI (1) FI55904C (en)
FR (1) FR2014877B1 (en)
GB (1) GB1280236A (en)
NL (1) NL145334B (en)
NO (1) NO133378C (en)
SE (1) SE347805B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4354686A (en) * 1979-07-06 1982-10-19 Matsushita Electric Industrial Co., Ltd. Contact-free sealing member

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1450275A1 (en) * 1964-04-16 1969-08-28 Krupp Gmbh Seal construction
DE1475588A1 (en) * 1965-02-24 1969-03-13 Krupp Gmbh Seal construction

Also Published As

Publication number Publication date
FI55904B (en) 1979-06-29
DE1937247A1 (en) 1970-02-05
SE347805B (en) 1972-08-14
DE1937247B2 (en) 1973-05-10
DE1937247C3 (en) 1973-12-06
CH512026A (en) 1971-08-31
NL145334B (en) 1975-03-17
NL6911696A (en) 1970-02-03
FR2014877A1 (en) 1970-04-24
NO133378C (en) 1976-04-21
BE736857A (en) 1969-12-31
FI55904C (en) 1979-10-10
NO133378B (en) 1976-01-12
FR2014877B1 (en) 1974-08-09

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee