US3899801A - Castor for use with pile carpet - Google Patents

Castor for use with pile carpet Download PDF

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Publication number
US3899801A
US3899801A US498380A US49838074A US3899801A US 3899801 A US3899801 A US 3899801A US 498380 A US498380 A US 498380A US 49838074 A US49838074 A US 49838074A US 3899801 A US3899801 A US 3899801A
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US
United States
Prior art keywords
bosses
wheel
castor
carpet
pile
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 - Lifetime
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US498380A
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English (en)
Inventor
Vernon J Carrier
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to US498380A priority Critical patent/US3899801A/en
Priority to JP50092442A priority patent/JPS5137446A/ja
Application granted granted Critical
Priority to IT83643/75A priority patent/IT1045173B/it
Priority to FR7525656A priority patent/FR2282344A1/fr
Priority to DE19752536906 priority patent/DE2536906A1/de
Publication of US3899801A publication Critical patent/US3899801A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B33/00—Castors in general; Anti-clogging castors
    • B60B33/0028—Construction of wheels; methods of assembling on axle

Definitions

  • a castor for use on a pile carpet can be constructed so as to include a plurality of separate, spaced bosses extending from the surface of a cylindrical wheel or roller used in the castor. In use such bosses distribute the weight transmitted to the carpet through the wheel unevenly in such a manner as to prevent any significant matting of the pile of the carpet.
  • pile carpet designates a heavy fabric for use in covering a floor.
  • pile as used herein in connection with the word carpet is intended to designate surface fibers projecting from the surface of such a carpet. These pile fibers may be either cut or looped; normally they extend more or less perpendicular to the exposed surface of a carpet.
  • pile carpet In certain types of pile carpet the pile fibers extend from the surface of the carpet so that they are substantially parallel to one another and are generally or nearly perpendicular to this surface. Frequently, however, the pile fibers used in pile carpets are either sufficiently flexible and/or sufficiently long and/or are inadequately supported by the carpet so as to extend in this manner.
  • the fibers in carpets of the latter category will of course tend to bend so as to provide a pile surface in which the fibers may overlie one another to varying extents.
  • Some carpets are constructed so as to utilize pile fibers which bend in this manner so as to achieve a desired aesthetic or similar effect while other carpets are constructed so that the pile fibers tend to remain perpendicular to a carpet surface.
  • roller castors have normally been constructed so as to include a wheel or roller rotatably mounted about an axle which in turn is mounted in such a manner that the roller or wheel can rotate about a horizontal axis and about a vertically extending axis as the castor is used.
  • wheels or rollers When the surfaces of such wheels or rollers are of a cylindrical or spherical shape they tend to mat or compact pile fibers on pile carpet in the same manner as the balls in ball castors. This is of course a result of the concentration of the load placed upon the carpet in a comparatively small region or area of the carpet.
  • a broad object of the present invention is to fulfill this need.
  • Other objects of the invention are to provide castors as described: which can be constructed at a comparatively nominal cost; which are easily and conveniently used; and which effectively avoid any significant matting or permanent compacting of carpet pile fibers.
  • the invention is also intended to provide castors which are specifically constructed in such a manner as to avoid any reasonable chance of damaging such pile fibers as by cutting them or the like.
  • a castor for use on pile carpet this castor having a cylindrical castor wheel and means for mounting the wheel so that the wheel can rotate about its axis
  • the improvement comprises: a plurality of separate bosses located on the surface of the wheel so as to extend therefrom, these bosses being spaced from one another and being the only 'projec tions from the surface of the wheel capable of contact ing the carpet, these bosses being shaped so as to have non-pointed ends remote from the wheel and being shaped so that these ends are smaller than the portions of the bosses at the periphery of the wheel.
  • FIG. 1 is an end elevational view of a presently preferred embodiment or form of a castor in accordance with this invention
  • FIG. 2 is a cross sectional view taken at line 2-2 of FIG. 1;
  • FIG. 3 is a fragmentary cross sectional view corresponding to a part of FIG. 2;
  • FIG. 4 is a lineal projection illustrating the periphery of the wheel employed in the castor illustrated in the preceding figure.
  • FIG. 5 is a side elevational, partially in section, view illustrating a cap capable of being employed with the castor shown in the preceding figures.
  • a castor of the present invention which includes a generally cylindrical castor wheel 12.
  • This wheel 12 is provided with a centrally located opening 14 into which there is fitted a conventional bearing sleeve 16.
  • This sleeve 16 carries a conventional axle 18 so that the wheel 12 is positioned between conventional washers 20 on the axle 18.
  • a conventional head 22 on one end of the axle 18 is used for preventing the wheel 12 from coming off of this axle 18.
  • the end of the axle 18 remote from the head 22 is provided with a conventional bent shank 24 terminating in a top portion 26.
  • This top portion 26 is located generally perpendicular to the axis of the wheel l2 in a conventional manner.
  • This top portion 26 is also shaped in a conventional manner so as to be capable of being retained in a conventional mounting member (not shown) used to support the castor 10 in such a manner that the castor 10 can be turned about a vertical axis when in use while the axis of the wheel 12 remains in a horizontal position.
  • a small end cap 28 may be located in an annular groove 30 in the wheel 12 so as to cover the head 22 and one of the washers 20.
  • the surface of the castor I0 is provided with a plurality of identical bosses 32.
  • These bosses 32 are preferably located as close to one another as reasonable possible in order to achieve a comparatively effective weight distribution when the castor 10 is used. These bosses 32 are spaced from one another for the same reason.
  • Each of these bosses in the preferred embodiment of the castor 10 has the shape of a frustum of a right circular cone.
  • bosses 32 it is preferred to form the bosses 32 in such a conical shape since bosses of this shape will tend to fit between pile fiber and will only compact or mat such fibers to a restricted degree. Further, when the bosses 32 are of this shape and are oriented on the wheel 12 so that their axis intercept the axis of the wheel 12 these bosses 32 are symetrically located in such a manner that the wheel 12 may be rotated in either direction about its axis with equal facility.
  • bosses 32 should be projections of a uniform cross sectional configuration or if they should be canted around the periphery of the wheel 12 so that their axes would not intercept the axis of the wheel 12 there is a reasonable possibility of a carpet being damaged when the castor I0 is used and- /or of this castor 10 not performing in a desired manner.
  • bosses 32 are provided with non-pointed ends 34 which extend transverse to the axes of these bosses 32 and these ends 34 are preferably provided with slightly rounded edges 36.
  • the use of such slightly rounded edges 36 is considered preferable so as to minimize the chances of a pile fiber being cut or damaged.
  • the bosses 32 are preferably located as close to one another as reasonably possible and are preferably equally spaced from one another around the periphery of the wheel 12. As a consequence of such spacing around the periphery of the wheel 12 the castor 10 will exert the same action with respect to a carpet regardless of the position of the wheel 12 relative to such carpet.
  • Such action involves a weight distribution between adjacent pile fibers in such a manner that the bosses 32 extend generally between some of such fibers so as to tend to exert weight where such fibers are attached to a carpet proper.
  • the tapered shapes of these bosses 32 leading from the ends 34 to the portions 38 of the bosses 32 at the periphery of the wheel 12 operate so as to tend to push carpet pile fibers together as such fibers extend more or less vertically. This makes it possible for such fibers themselves to carry a certain amount of weight as they are compacted together. As a consequence of this type of action there is substantially no danger of damage to a pile carpet resulting from matting or compacting when the castor 10 is used on such a carpet.
  • the bosses 32 are located in rows as indicated in FIG. 4 of the drawing in such a manner that a cap 40 having internal threads 42 may be threaded over the wheel 12 and the bosses 32. These threads 42 are of such dimension as to fit over'and around the ends 34 of the bosses 32. Normally friction between the ends 34 of the bosses 32 and the threads 42 will be adequate to hold the cap 40 in place as the castor is used on other than a pile carpet.
  • a castor for use on a pile carpet said castor having a cylindrical wheel and means for mounting said wheel so that said wheel can rotate about its axis in which the improvement comprises:
  • bosses located on the surface of said wheel so as to extend therefrom, said bosses being spaced from one another and being located adjacent to one another, said bosses being the only projections from the surface of said wheel capable of contacting a carpet, said bosses being shaped so as to have ends remote from said wheel of a nonpointed configuration and being shaped so that said ends are of smaller dimensions than the portions of said bosses at the periphery of said wheel.
  • each of said bosses gradually decreases in cross sectional configuration as it extends away from the surface of said wheel.
  • none of said bosses has any sharp edge capable of cutting pile on a carpet.
  • each of said bosses has a shape of a frustum of of a right circular cone.
  • each of said bosses has the shape of a frustum of a right circular cone and is located so that its axis intercepts the axis of said wheel,
  • each of said bosses also having its largest extremity adjacent to the periphery of said wheel and having a rounded edge remote from said wheel,
  • bosses being located on said wheel at a pattern such that a threaded cap may be threaded over said bosses.
  • a castor as claimed in claim 5 including:
  • a cap having internal threads located therein threaded on said bosses.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Legs For Furniture In General (AREA)
  • Casters (AREA)
US498380A 1974-08-19 1974-08-19 Castor for use with pile carpet Expired - Lifetime US3899801A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US498380A US3899801A (en) 1974-08-19 1974-08-19 Castor for use with pile carpet
JP50092442A JPS5137446A (en) 1974-08-19 1975-07-28 Pairukaapetsutoto tomonimochiirukyakurin
IT83643/75A IT1045173B (it) 1974-08-19 1975-08-19 Ruota orientabile per tappeti a ricci
FR7525656A FR2282344A1 (fr) 1974-08-19 1975-08-19 Roulette pivotante destinee a etre utilisee avec un tapis a poils
DE19752536906 DE2536906A1 (de) 1974-08-19 1975-08-19 Moebelrolle zur verwendung fuer florteppiche

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US498380A US3899801A (en) 1974-08-19 1974-08-19 Castor for use with pile carpet

Publications (1)

Publication Number Publication Date
US3899801A true US3899801A (en) 1975-08-19

Family

ID=23980848

Family Applications (1)

Application Number Title Priority Date Filing Date
US498380A Expired - Lifetime US3899801A (en) 1974-08-19 1974-08-19 Castor for use with pile carpet

Country Status (5)

Country Link
US (1) US3899801A (enExample)
JP (1) JPS5137446A (enExample)
DE (1) DE2536906A1 (enExample)
FR (1) FR2282344A1 (enExample)
IT (1) IT1045173B (enExample)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3981042A (en) * 1975-11-20 1976-09-21 Carrier Vernon J Pile carpet castor
US4092031A (en) * 1977-01-03 1978-05-30 General Electric Company Tracked support for a cabinet
US4250593A (en) * 1979-03-17 1981-02-17 Albert Schulte Sohne Kg Caster wheel for a carrying apparatus such as a shopping cart and the like
US4321727A (en) * 1979-03-19 1982-03-30 Sheiman Samuel R Luggage roller
USD309254S (en) 1987-06-25 1990-07-17 Oscar Investments Pty. Limited Roller wheel
US5244531A (en) * 1991-02-19 1993-09-14 W-W Sales, Incorporated Roofing seam roller
US5570764A (en) * 1995-02-01 1996-11-05 Roller Wheels, Inc. Roller wheel assembly
US5960514A (en) * 1997-11-10 1999-10-05 The Hoover Company Wheel driven suction nozzle
US20120187748A1 (en) * 2011-01-21 2012-07-26 Thomas Alan Davis Low friction wheel for toy cars
USD774336S1 (en) * 2014-09-18 2016-12-20 John Pomp Studios, Inc. Rondelle credenza

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US759299A (en) * 1903-05-20 1904-05-10 Clyde E Myers Caster-wheel.
US1305535A (en) * 1919-06-03 Vehicle-wheei
US2152684A (en) * 1935-11-23 1939-04-04 Allied Engineering Company Wheel
US2403812A (en) * 1940-03-14 1946-07-09 Maccallum Claude Ronald Antiskid tread
US3140506A (en) * 1961-12-04 1964-07-14 Arenson Herbert Furniture support roller
US3492016A (en) * 1968-04-18 1970-01-27 Dennis J O Connor Wheeled vehicle

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1305535A (en) * 1919-06-03 Vehicle-wheei
US759299A (en) * 1903-05-20 1904-05-10 Clyde E Myers Caster-wheel.
US2152684A (en) * 1935-11-23 1939-04-04 Allied Engineering Company Wheel
US2403812A (en) * 1940-03-14 1946-07-09 Maccallum Claude Ronald Antiskid tread
US3140506A (en) * 1961-12-04 1964-07-14 Arenson Herbert Furniture support roller
US3492016A (en) * 1968-04-18 1970-01-27 Dennis J O Connor Wheeled vehicle

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3981042A (en) * 1975-11-20 1976-09-21 Carrier Vernon J Pile carpet castor
US4092031A (en) * 1977-01-03 1978-05-30 General Electric Company Tracked support for a cabinet
US4250593A (en) * 1979-03-17 1981-02-17 Albert Schulte Sohne Kg Caster wheel for a carrying apparatus such as a shopping cart and the like
US4321727A (en) * 1979-03-19 1982-03-30 Sheiman Samuel R Luggage roller
USD309254S (en) 1987-06-25 1990-07-17 Oscar Investments Pty. Limited Roller wheel
US5244531A (en) * 1991-02-19 1993-09-14 W-W Sales, Incorporated Roofing seam roller
US5570764A (en) * 1995-02-01 1996-11-05 Roller Wheels, Inc. Roller wheel assembly
US5960514A (en) * 1997-11-10 1999-10-05 The Hoover Company Wheel driven suction nozzle
US20120187748A1 (en) * 2011-01-21 2012-07-26 Thomas Alan Davis Low friction wheel for toy cars
USD774336S1 (en) * 2014-09-18 2016-12-20 John Pomp Studios, Inc. Rondelle credenza

Also Published As

Publication number Publication date
IT1045173B (it) 1980-05-10
DE2536906A1 (de) 1976-03-11
FR2282344B1 (enExample) 1979-09-14
FR2282344A1 (fr) 1976-03-19
JPS5220735B2 (enExample) 1977-06-06
JPS5137446A (en) 1976-03-29

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