Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
  • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
  • B60C11/14—Anti-skid inserts, e.g. vulcanised into the tread band
  • B60C11/16—Anti-skid inserts, e.g. vulcanised into the tread band of plug form, e.g. made from metal, textile
  • B60C11/1606—Anti-skid inserts, e.g. vulcanised into the tread band of plug form, e.g. made from metal, textile retractable plug

Definitions

• the present invention relates to an arrangement in studded tires with retractable studs, and includes a movable wall defining together with the inside of the tire an air chamber, which may be inflated for moving the studs fastened to the wall out through passages in the tread of the tire.
• the object of the present invention is to obviate the disadvantages with which previously known arrange- ments of the kind mentioned above are burdened, and to provide a simple and reliable arrangement where the studs may be retracted and protruded such as to be locked in their protrudent state, the arrangement being such as to ensure a fully effective seal between the studs and the tire as well as a decreased risk of punctures.
• This object is achieved primarily by locking means in the tire in association with the passages mentioned, these means being adapted to. lock the studs in their protrudent positions for desired periods, the object also being achieved with the aid of the characterizing features disclosed in the subclaims. Description of Figures
• Figure 1 is a section through a part of a schematically illustrated tire provided with an arrangement in accordance with the invention, a stud being shown in a retracted, first position, and
• Figure 2 is a section substantially correspond ⁇ ing to the one in Figure 1 but with the arrangement being illustrated with a stud in a protrudent second position.
• the tire provided with an arrangement in accordance with the invention has a tread denoted by 1 and an inner lining denoted by 2.
• An interior wall 3 movably accommodated in an unillustrated way inside the tire forms a closed chamber 4 together with the lining 2.
• a stud anchor 5 is fixed to the wall 3, and wedging rods 6 are fixed to the anchor.
• a stud 7, provided at either end with a hexagonal socket 8, 11, is screwed tightly into the anchor 5 such that the socket 8 is accessible from the inward side of the tire via a passage 9 in the anchor.
• a locking and sealing sleeve 10 is fixed in the tire with the aid of a flange 10a on the sleeve.
• the stud 7 is accommodated in the sleeve for reciprocating, longitudinal movement such that the active end of the stud can project out from a passage 1a in the tire tread.
• An upper sealing ring 12 seals between an upper cylindrical portion 14 of the stud and a bore 16 in the sleeve 10, and a lower seal ⁇ ing ring 13 seals between a lower conical portion 15 of the stud 7 and a passage 17 in the sleeve 10 complemental "to the conical portion 15.
• the sleeve 10 is also provided with bores 18 for the wedging rods 6, and bores 19 for balls 20.
• the conical passage 17 is provided with rubber cladding 21 for also sealing against the conical portion 15 of the stud 7.
• the inner wall 3 is provided with a hole 22, from which a hose 23 extends to a valve 25 threaded on to an attachment plate 24 attached to the rim on which the tire is mounted.
• the valve 25 is provided with a valve needle 26 and is externally threaded for meshing with the interior thread of a two chamber nipple 27 provided with an inner pin 28 and vent hole 29.
• This nipple is suitably hexagonal in cross section, is internally threaded at either end and is reversible. In one position, the pin 28 can depress the needle 26, thus allowing venting of the air in the chamber 4 via the vent hole 29. In the reverse position of the nipple it is not possible to vent the chamber, but air may be pumped into it.
• the nipple is also provided with a protective cap 30, which has an external thread for screwing into either end of the nipple, as well as wings 32 and a hexagonal socket 31 fitting the body of the nipple.
• a protective cap 30 which has an external thread for screwing into either end of the nipple, as well as wings 32 and a hexagonal socket 31 fitting the body of the nipple.
• the air is let out from the chamber 4 by screwing the two- chamber nipple 27 ⁇ i j the-valve--25 so. that the pin 28 depresses the valve needle 26.
• the cap 30 is provided with wings 32 and the hexagonal socket 31 fitting the body of. the nipple 27.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Tires In General (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=20360962

Family Applications (1)

Country Status (5)

Families Citing this family (7)

Family Cites Families (3)

• 1985
  • 1985-07-25 SE SE8503589A patent/SE448614B/sv not_active IP Right Cessation
• 1986
  • 1986-07-25 EP EP19860904967 patent/EP0409820A1/en not_active Withdrawn
  • 1986-07-25 WO PCT/SE1986/000343 patent/WO1987000488A1/en not_active Application Discontinuation
  • 1986-07-25 JP JP50417986A patent/JPS63500791A/ja active Pending
• 1987
  • 1987-03-17 DK DK136687A patent/DK136687A/da not_active Application Discontinuation

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events