Classifications

• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
  • H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
  • H02G3/02—Details
  • H02G3/04—Protective tubing or conduits, e.g. cable ladders or cable troughs
  • H02G3/0462—Tubings, i.e. having a closed section
  • H02G3/0481—Tubings, i.e. having a closed section with a circular cross-section

Definitions

• the invention relates to a protective sleeve for enclosing lengths of electrical and
• E & M conducting devices such as cables, wiring, and tubing, and more particularly, to a one piece plastic sleeve having male and female locking members located along first and second longitudinal edges which allow the plastic sleeve to be closed by inserting the male member within the female member.
• tubular enclosures having longitudinal points of attachment are known.
• the tubular enclosures are sheets of material wrapped around elongated objects such as wiring, cables, or other forms of tubing which are closed along the longitudinal edges to provide a sealed environment for the object or objects contained therein.
• United States Patent Nos. 1,895,133 to Quamstrom; 2,067,665 to Holt; 3,625,259 to Kennedy; 4,513,787 to Hegler; and 4,944,976 to Plumer all disclose various designs of tubular enclosures, however, each of the above-mentioned patents fall short of the advantages offered by the present invention.
• the tubular enclosures presently available do not include separate sealing means for preventing the introduction of undesirable elements such as soil or water into the protective sleeve over an extended period of time. Further, the sealing means of the present invention can be attached to the protective sleeve after the object or objects to be contained have been inserted into the protective sleeve.
• the invention provides a protective sleeve having increased tubular strength for spooling the sleeve onto a reel to facilitate transportation of the sleeve.
• the sleeve is extruded in the form of a closed conduit and has an outwardly projecting female locking member.
• the sleeve is slit longitudinally to allow for the insertion of object or objects and once the object or objects have been inserted, the edge of the sleeve distal to the female locking member is inserted into the gap provided by the female locking member- The distal edge and the female locking member are then sealed together.
• a protective sleeve which incorporates sealing means which preclude the introduction of undesired elements such as soil and water. It is another object of the present invention to provide a protective sleeve which allows for the introduction of sealing means after the object or objects to be contained have been inserted into the protective sleeve and just prior to closing the structure.
• the present invention provides a protective sleeve assembly which generally comprises a single piece of plastic having a longitudinal body which includes an inner surface, an outer surface, a male locking member along a first longitudinal edge and a mating female locking member located along a second longitudinal edge.
• the protective sleeve is made of a relatively deformable plastic which allows for deformation of the sleeve without damaging the contents of the sleeve.
• the male locking member typically includes a first enlarged diameter portion and a second reduced diameter portion.
• the female locking member typically has a substantially U-shaped cross-section comprising a first leg which continuously extends from the body portion and a second flexible leg projecting upwardly from the body portion. Disposed within the U-shaped cross-section is a sealing means such as an elastomeric material which has the capability of conforming to the shape of the gap provided within the U-shaped cross-section once the male and female blocking members are connected.
• the leading portion of the second leg of the female locking member can be provided with a chamfer which allows a tool to pry the second leg open allowing the male member to be disconnected therefrom.
• the protective sleeve can be extruded in a tubular form having a female locking member projecting therefrom.
• the sleeve is slit open longitudinally and the object or objects to be protected are indented through the slit. Thereafter the edge of the sleeve most distal to the femal locking member is inserted into the gap provided between the outer surface of the protective sleeve and inner wall of the female locking member. With the distal edge otherwise referred to herein as the male locking member, positioned within the female locking member, the male and female locking members are sealed together to protect the object or objects from the elements.
• Figure 1 is a cross-sectional end view of the present invention shown in a locked position.
• Figure 2 is a cross-sectional end view of the present invention shown in a disengaged position with the sealing material inserted within the female locking member.
• Figure 3 is a cross-sectional end view of the present invention shown in a locked position with sealing material contained between the male and female locking members.
• Figure 4 is a cross-sectional end view of the present invention wherein the male and female locking members have been plastic welded together.
• Figure 5 is a cross sectional end view of the present invention wherein the protective sleeve is extruded as a tube.
• a cross-sectional end view of the sleeve assembly 10 of the present invention is generally comprised of a longitudinal body portion 12 and male and female locking members 18 and 32, respectively, extending from the body portion 12 at first and second longitudinal edges.
• the sleeve assembly 10 is typically formed of extruded plastic and can extend essentially to any length necessary.
• the embodiment of Figure 1 has an overall round cross-section, although it will be understood that other overall shapes are possible.
• the protective sleeve assembly 10 is formed and the male and female locking members 18 and 32 are connected for shipping purposes.
• the male locking member 18 which extends from the body portion 12 at a first longitudinal «dge has a width which is thinner than that of the body portion 12.
• the inner surface 22 is formed with a step 24 which gives the male locking member 18 a reduced thickness.
• a longitudinally flange 26 Extending outwardly from the outer surface 20 of the male locking member 18 is a longitudinally flange 26 which, upon connection, locks into the female locking member 32.
• the flange 26 is provided with a blocking wall 28 at its trailing end and a downwardly tapering lead-in portion 30.
• the downwardly tapering lead- in portion 30 assists in the insertion of the male locking member 18 into the female locking member 32.
• the female locking member 32 which extends longitudinally from a second longitudinal edge of the body portion 12 has a U-shape in cross-section.
• the female locking member 32 has a first leg 34 which is a continuation of the body portion 12 and a second L-shaped leg 40 which projects upwardly from the body portion 12.
• the inner surface of the first leg 38 is essentially a smooth continuation of the inner surface 16 of the body portion 12.
• the first leg 38 typically is about half as thick as the body portion 12 to accommodate for the thickness of the substantially overlapping male locking member 18.
• the second substantially L-shaped leg 40 flexes to receive male locking member 18.
• Point 42 is where the leg 38 projects up from the body portion 12.
• the first end of the leg 38 is provided with an inwardly projecting longitudinally flange 44.
• This flange 44 is provided with a first surface 46, as shown more clearly in Figure 2, which abuts the blocking wall 28 of the male locking member 18 upon connection of the male and female locking members. Additionally, the first end of the inwardly projecting flange 44 is chamfered at point 48 to allow for the insertion of a tool which is used to pry the second leg 40 open to facilitate joining the male and female locking members together. As can be see in Figure 1, a gap 50 is provided between the male locking member 18 and the female locking member 40 when the male locking member is engaged within the female locking member.
• a cross-sectional end view of the present invention is shown in a disengaged position with a sealing material 52 being inserted between the first and second legs 34 and 40, respectively.
• the male locking member 18 is withdrawn from the female locking member 32 by prying the second leg 40 open with a tool (not shown).
• a sealant dispenser 54 which typically has a tapered tip is inserted under the chamfered portion 48 of the second leg 40.
• a sealing material is inserted. It is preferable that the sealing material be inserted just prior to locking the sleeve assembly 10 to contain the conducting equipment 56. Often because the sealing material is made from a deformable elastomeric material such as a non-hardening rubber, the sealing material will "cold flow", or shift, which will result in an imperfect seal if the sealing material is inserted too soon.
• the male locking member 18 is again inserted into the female locking member 32, as shown in Figure 3.
• the sleeve assembly tends to be easily closable after the sealing material has been positioned within the female locking member.
• the tapered lead-in portion 30 of the flange 26 forces the second leg 40 to flex open until the flange 26 passes by the inwardly projecting flange 44 and snap locks in behind blocking wall 46.
• the sealing material 52 is capable of conforming to the dimensions of gap 50 when the male locking member 18 is engaged within the female locking member, thereby filling gap 50.
• additional sealing can be accomplished by plastic welding the male and female locking members 18 and 32 together. Once the male and female locking members have been snap locked, additional plastic is provided at the point 58 which is contiguous with the leading end of second leg. The additional plastic is melted upon the male member which permanently seals the male locking member 18 within the female locking member 32.
• the sleeve assembly can be extended in the disconnected position similar to the view in Figure 2 or it can be extruded in a tubular manner as shown in Figure 5. Extrusion in a tubular form is often desirable as this eliminates the possibility of contamination prior to inserting the object or objects to be protected and makes it easier to ship the protective sleeve.
• the protective slleve has a female locking member 32 projecting outwardly from the outer surface 14.
• a severable web 60 is provided at the leading end 50 of the male member 18.
• a slit is cut into the protective sleeve at the web 60 thereby separating the sleeve to provide the male and female locking members 18 and 32, respectively.
• the object or objects are inserted through the slit and the male member is inserted into the female member 32 to close the sleeve.
• the male member 18 primarily becomes locked within the female member 32 as a result of the flange 44 abutting against the blocking wall 28.
• the seal can be further reinforced with glue or by arc welding the male and female locking members together and by providing a sealing material (now shown) in gap 50.

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• 1992
  • 1992-03-19 CA CA 2132436 patent/CA2132436A1/en not_active Abandoned
  • 1992-03-19 AU AU23143/92A patent/AU666321B2/en not_active Expired - Fee Related
  • 1992-03-19 WO PCT/US1992/002221 patent/WO1993018982A1/en not_active Application Discontinuation
  • 1992-03-19 BR BR9207105A patent/BR9207105A/pt active Search and Examination
  • 1992-03-19 JP JP5516488A patent/JPH07504874A/ja active Pending
  • 1992-03-19 EP EP92915164A patent/EP0630341A1/de not_active Ceased

Patent Citations (2)

Non-Patent Citations (1)

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