GB1112557A - Improvements in or relating to viscous couplings - Google Patents

Improvements in or relating to viscous couplings

Info

Publication number
GB1112557A
GB1112557A GB3331465A GB3331465A GB1112557A GB 1112557 A GB1112557 A GB 1112557A GB 3331465 A GB3331465 A GB 3331465A GB 3331465 A GB3331465 A GB 3331465A GB 1112557 A GB1112557 A GB 1112557A
Authority
GB
United Kingdom
Prior art keywords
rotor
fluid
slots
casing
notches
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
GB3331465A
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.)
Smiths Group PLC
Original Assignee
Smiths Group PLC
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 Smiths Group PLC filed Critical Smiths Group PLC
Priority to GB3331465A priority Critical patent/GB1112557A/en
Publication of GB1112557A publication Critical patent/GB1112557A/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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D35/00—Fluid clutches in which the clutching is predominantly obtained by fluid adhesion
    • F16D35/02—Fluid clutches in which the clutching is predominantly obtained by fluid adhesion with rotary working chambers and rotary reservoirs, e.g. in one coupling part
    • F16D35/021—Fluid clutches in which the clutching is predominantly obtained by fluid adhesion with rotary working chambers and rotary reservoirs, e.g. in one coupling part actuated by valves
    • F16D35/023—Fluid clutches in which the clutching is predominantly obtained by fluid adhesion with rotary working chambers and rotary reservoirs, e.g. in one coupling part actuated by valves the valve being actuated by a bimetallic coil

Abstract

1,112,557. Hydraulic couplings. SMITHS INDUSTRIES Ltd. (Eaton Manufacturing Co.). 4 Aug., 1965, No. 33314/65. Heading F2C. A viscous coupling for driving a vehicle cooling fan has a working chamber 40 supplied with fluid from a reservoir 58 under the control of a bimetallic temperature-responsive coil, and has build-up of fluid in the shear space 56 formed between interdigitating projections 57 on an input rotor 11 and an output casing 12 delayed by notches 70 or slots formed in the cylindrical periphery of the rotor. The notches or slots serve to pump fluid from the shear space 56 to the opposite side of the rotor, whence it flows to the reservoir through ports 63 which are associated with pumping elements 66 fast with the casing 12. As shown, notches 70 are provided which get progressively narrower and shallower in the axial direction of the shear space and which are angled to assist the pumping action. As an alternative slots (Figs. 6-8, not shown) of uniform depth throughout the entire width of the rotor may be provided, the slots being suitably shaped and angled to promote pumping. The delay in build-up of fluid in the shear space retards acceleration of the output casing upon acceleration of the input rotor and thus causes fan noise, caused by acceleration of the fan, to lag behind, and thus be masked by, the engine noise. Cooling fins may be provided on the casing.
GB3331465A 1965-08-04 1965-08-04 Improvements in or relating to viscous couplings Expired GB1112557A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3331465A GB1112557A (en) 1965-08-04 1965-08-04 Improvements in or relating to viscous couplings

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3331465A GB1112557A (en) 1965-08-04 1965-08-04 Improvements in or relating to viscous couplings

Publications (1)

Publication Number Publication Date
GB1112557A true GB1112557A (en) 1968-05-08

Family

ID=10351341

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3331465A Expired GB1112557A (en) 1965-08-04 1965-08-04 Improvements in or relating to viscous couplings

Country Status (1)

Country Link
GB (1) GB1112557A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3439794A1 (en) * 1984-10-31 1986-04-30 Fichtel & Sachs Ag, 8720 Schweinfurt VISCULE COUPLING WITH IMPROVED COLD START BEHAVIOR
FR2621088A1 (en) * 1987-09-30 1989-03-31 Aisin Seiki FLUID COUPLING DEVICE

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3439794A1 (en) * 1984-10-31 1986-04-30 Fichtel & Sachs Ag, 8720 Schweinfurt VISCULE COUPLING WITH IMPROVED COLD START BEHAVIOR
GB2166523A (en) * 1984-10-31 1986-05-08 Fichtel & Sachs Ag Fluid friction coupling
US4665694A (en) * 1984-10-31 1987-05-19 Fichtel & Sachs Ag Fluid friction coupling
FR2621088A1 (en) * 1987-09-30 1989-03-31 Aisin Seiki FLUID COUPLING DEVICE

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