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US3871675A - Snowmobile ski - Google Patents

Snowmobile ski Download PDF

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Publication number
US3871675A
US3871675A US321120A US32112073A US3871675A US 3871675 A US3871675 A US 3871675A US 321120 A US321120 A US 321120A US 32112073 A US32112073 A US 32112073A US 3871675 A US3871675 A US 3871675A
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United States
Prior art keywords
ski
snowmobile
snow
occupants
forward portion
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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US321120A
Inventor
Jerome E Lund
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Arctic Cat Inc
ARCTIC ENTERPRISES Inc
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ARCTIC ENTERPRISES Inc
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Priority to US321120A priority Critical patent/US3871675A/en
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Publication of US3871675A publication Critical patent/US3871675A/en
Assigned to CERTIFIED PARTS CORPORATION reassignment CERTIFIED PARTS CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: ARTIC ENTERPRISES, INC.
Assigned to ARCTCO, INC. reassignment ARCTCO, INC. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: CERTIFIED PARTS CORPORATION, A DE CORP
Assigned to NORTHERN LIFE INSURANCE COMPANY reassignment NORTHERN LIFE INSURANCE COMPANY SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ARCTCO, INC.,
Assigned to NORTHWESTERN NATIONAL LIFE INSURANCE COMPANY ("NWNL"), reassignment NORTHWESTERN NATIONAL LIFE INSURANCE COMPANY ("NWNL"), SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). SUBJECT TO LICENSE RECITED Assignors: ARCTCO, INC.,
Assigned to ARCTCO, INC., reassignment ARCTCO, INC., RELEASED BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). RECORDED AT REEL 4660 FRAMES 059-062. Assignors: NORWEST BANK MINNEAPOLIS, NATIONAL ASSOCIATION
Assigned to ARCTCO, INC., A MN CORP. reassignment ARCTCO, INC., A MN CORP. RELEASED BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: NORTHERN LIFE INSURANCE COMPANY, NORTHWESTERN NATIONAL LIFE INSURANCE COMPANY
Assigned to ARCTCO, INC., A MN CORP. reassignment ARCTCO, INC., A MN CORP. RELEASED BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: NORTHERN LIFE INSURANCE COMPANY, NORTHWESTERN NATIONAL LIFE INSURANCE COMPANY, NORTHWESTERN NATIONAL LIFE INSURANCE COMPANY SEPARATE ACCOUNT NO. 5
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M27/00—Propulsion devices for sledges or the like
    • B62M27/02—Propulsion devices for sledges or the like power driven
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M27/00—Propulsion devices for sledges or the like
    • B62M27/02—Propulsion devices for sledges or the like power driven
    • B62M2027/025—Snow mobiles characterised by the skis

Definitions

  • the invention relates to a ski for a snowmobile and particularly to a ski having means to deflect snow away from the driver of the vehicle.
  • Such ski generally has an elongated body with an upwardly curved forward portion and outer edges extend ing laterally in substantially a straight line along the entire length thereof, including the upwardly curved forward portion.
  • FIG. I is a top plan view of a snowmobile ski embodying the present invention.
  • FIG. 2 is a side elevational view of the forward portion of FIG. 1.
  • FIG. 3 is a cross-sectional view taken along line 33 of FIG. 2.
  • FIG. 4 is a cross-sectional view taken along line 4--4 of FIG. 2.
  • FIG. 5 is a cross-sectional view taken along line 55 of FIG. 2.
  • FIG. 6 is a top plan view of an alternate ski construction embodying the present invention.
  • FIG. 7 is a cross-sectional view taken along line 77 of FIG. 6.
  • FIG. 8 is a cross-sectional view taken along line 8-8 of FIG. 6.
  • FIG. 10 shows a snowmobile ski generally designated by the numeral 10, a pair of which are typically attached in parallel spaced-apart relationship at the front end of a snowmobile (not shown) by any one of a number of means well known in the art, although some snowmobiles employ a single ski.
  • the ski 10 has an elongated body 12 with an upwardly curved forward portion 14 terminating in a leading tip 16, a central portion 18 and edge portions 20 and 22 respectfully extending laterally outwardly from the central portion 18.
  • this central portion is in the form of a longitudinal depressed channel which is commonly formed in snowmobile skis to prevent sideward sliding when the vehicle is in motion, expecially when cornering.
  • the invention is applicable to other basic ski configurations, for example, a flat ski as shown in FIGs. 6 through 8.
  • edge portions 20 and 22 are curved downwardly at the front of the ski 16 to form an arcuate portion 24 in transverse cross section as best shown in FIGS. 4 and 5.
  • the arcuate portion 24 extends from a point near the midpoint on the arc defining the upwardly curved forward portion 14' of the ski 10 to the leading tip I6.
  • the radius of curvature of the arcuate portion 24 increases from zero at the midpoint to ap proximately 2 inches at the tip 16 on a ski approxi mately 6 /2 inches wide and 46 inches long. Obviously the radius of curvature could vary depending on the width of the ski.
  • FIGS. 6 through 8 show the invention in a flat ski.
  • a snowmobile ski configured to reduce or elimi nate the spraying of snow backwards onto occupants of a snowmobile and comprising an elongated body having a generally straight portion for riding upon the snow, an upwardly curved forward portion terminating in a leading tip, and opposed transversely extending longitudinal edges, the transverse edges solely on the upwardly curved forward portion of the ski having portions depending laterally downwardly near said leading tip to deflect snow away from occupants of said snowmobile when said snowmobile is in motion.
  • ski as defined by claim 2 wherein said ski in cludes a central portion defining a longitudinal channel and each of said edge portions includes a said arcuate portion.
  • a snowmobile ski configured to reduce or eliminate the spraying of snow from the ski backwards onto occupants of a snowmobile and comprising an elongated ski body having an upwardly curved forward portion terminating in a leading tip, and opposed, transverse longitudinal edges arcuately curved transversely downwardly and outwardly to present generally concave surfaces to the snow, the arcuately curved longitudinal edges extending substantially to the leading tip of the ski, whereby snow contacted by the concave surfaces is deflected away from occupants of the snowmobile.
  • a snowmobile ski configured to reduce or eliminate the spraying of snow backwards onto occupants of a snowmobile and comprising a single, generally flat, unitary, elongated body having a generally U-shaped depression along its length and centrally of its width defining an elongated channel with longitudinal edges of the elongated body extending laterally outwardly from the channel, the elongated body having an upwardly curved forward portion terminating in a leading tip, the longitudinal edges of the elongated body only in the upto present generally concave edge undersurfaces to the snow, whereby snow contacted by said edge undersurfaces is deflected away from occupants of a snowmowardly curved forward portion curving arcuately out- 5 bile when the latter is in motionwardly and downwardly adjacent the leading tip so as

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Road Paving Structures (AREA)

Abstract

The edges of a snowmobile ski are curved laterally downwardly near the leading tip to deflect snow away from the occupants of the vehicle when it is in motion.

Description

llntteell tntee tent 11 1 1111 3,871,675
Land Mat. 18, I975 SNOWMOBILE SKI 3,675,939 7/1972 Vik 280/28 7 [7 n entor J me E- Lund hie er Falls, 3,734,523 5/1973 Flelcl -80/l6 Mlnn. FOREIGN PATENTS OR APPLICATIONS [73] Assignee: Arctic Enterprises, Inc. Thief River 94,024 6/1969 France 280/16 Falls, Minn.
22 Filed; Jam 5 1973 Primary Examiner-David Schonberg Assistant ExaminerMichael J. Forman [2]] Appl' 321,120 Attorney, Agent, or Firn1Molinare, Allcgretti, Newitt & Witcoff [52] US. Cl. 280/28, 9/310 R 5 l] Int. Cl. B62111 27/02 58 Field 61s66rc11 280/28, 15, 16, 17; [57] ABSTRACT 180/5 R The edges of a snowmobile ski are curved laterally downwardly near the leading tip to deflect snow away References cued from the occupants of the vehicle when it is in motion.
UNITED STATES PATENTS I 3,643,978 2/1972 Westberg 280/28 7 Clams 8 Drawmg F'gures PM'ENTEB HAM 8 IUFS SNOWMOBILE SKI BRIEF SUMMARY OF THE INVENTION The invention relates to a ski for a snowmobile and particularly to a ski having means to deflect snow away from the driver of the vehicle.
BACKGROUND OF THE INVENTION The spraying of snow backwardly over the hood of a snowmobile onto the driver and passenger has long been a safety and comfort problem in snowmobiling, especially as the vehicle traverses terrain at high speeds. It has been found that the existing typical prior art snowmobile ski contributes greatly to this problem. Such ski generally has an elongated body with an upwardly curved forward portion and outer edges extend ing laterally in substantially a straight line along the entire length thereof, including the upwardly curved forward portion.
SUMMARY OF THE INVENTION The above problem is overcome by curving a portion or the upwardly curved portion of the ski laterally downwardly. A ski having this shape deflects snow downwardly and to the sides, thus eliminating or substantially reducing the amount of snow sprayed onto the driver and passenger, depending on speed of the vehicle and snow conditions.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. I is a top plan view of a snowmobile ski embodying the present invention.
FIG. 2 is a side elevational view of the forward portion of FIG. 1.
FIG. 3 is a cross-sectional view taken along line 33 of FIG. 2.
FIG. 4 is a cross-sectional view taken along line 4--4 of FIG. 2.
FIG. 5 is a cross-sectional view taken along line 55 of FIG. 2.
FIG. 6 is a top plan view of an alternate ski construction embodying the present invention.
FIG. 7 is a cross-sectional view taken along line 77 of FIG. 6.
FIG. 8 is a cross-sectional view taken along line 8-8 of FIG. 6.
DESCRIPTION OF THE PREFERRED EMBODIMENTS The drawings show a snowmobile ski generally designated by the numeral 10, a pair of which are typically attached in parallel spaced-apart relationship at the front end of a snowmobile (not shown) by any one of a number of means well known in the art, although some snowmobiles employ a single ski.
The ski 10 has an elongated body 12 with an upwardly curved forward portion 14 terminating in a leading tip 16, a central portion 18 and edge portions 20 and 22 respectfully extending laterally outwardly from the central portion 18. In the basic ski construction shown in FIGS. I through 5, this central portion is in the form of a longitudinal depressed channel which is commonly formed in snowmobile skis to prevent sideward sliding when the vehicle is in motion, expecially when cornering. As will be apparent, the invention is applicable to other basic ski configurations, for example, a flat ski as shown in FIGs. 6 through 8.
In accordance with the invention the edge portions 20 and 22 are curved downwardly at the front of the ski 16 to form an arcuate portion 24 in transverse cross section as best shown in FIGS. 4 and 5.
While the invention is not limited thereto, the follow ing example describes a specific form that has achieved excellent results. The arcuate portion 24 extends from a point near the midpoint on the arc defining the upwardly curved forward portion 14' of the ski 10 to the leading tip I6. The radius of curvature of the arcuate portion 24 increases from zero at the midpoint to ap proximately 2 inches at the tip 16 on a ski approxi mately 6 /2 inches wide and 46 inches long. Obviously the radius of curvature could vary depending on the width of the ski.
FIGS. 6 through 8 show the invention in a flat ski.
The invention and many of its advantages will be understood from the foregoing description and it will be apparent that various changes may be made in the form and construction thereof without departing from the spirit and scope of the invention or sacrificing its material advantages, the form described being merely a preferred embodiment thereof.
I claim:
1. A snowmobile ski configured to reduce or elimi nate the spraying of snow backwards onto occupants of a snowmobile and comprising an elongated body having a generally straight portion for riding upon the snow, an upwardly curved forward portion terminating in a leading tip, and opposed transversely extending longitudinal edges, the transverse edges solely on the upwardly curved forward portion of the ski having portions depending laterally downwardly near said leading tip to deflect snow away from occupants of said snowmobile when said snowmobile is in motion.
2. The ski as defined by claim I wherein said downwardly depending portions are arcuate in transverse cross section.
3. The ski as defined by claim 2 wherein said arcuate portion extends from said tip of said ski to a point approximately on the midpoint on the arc defining said upwardly curved forward portion.
4. The ski as defined by claim 3 wherein the radius of curvature of said arcuate portion increases from zero at said midpoint to 3 inches at said tip.
5. The ski as defined by claim 2 wherein said ski in cludes a central portion defining a longitudinal channel and each of said edge portions includes a said arcuate portion.
6. A snowmobile ski configured to reduce or eliminate the spraying of snow from the ski backwards onto occupants of a snowmobile and comprising an elongated ski body having an upwardly curved forward portion terminating in a leading tip, and opposed, transverse longitudinal edges arcuately curved transversely downwardly and outwardly to present generally concave surfaces to the snow, the arcuately curved longitudinal edges extending substantially to the leading tip of the ski, whereby snow contacted by the concave surfaces is deflected away from occupants of the snowmobile.
7. A snowmobile ski configured to reduce or eliminate the spraying of snow backwards onto occupants of a snowmobile and comprising a single, generally flat, unitary, elongated body having a generally U-shaped depression along its length and centrally of its width defining an elongated channel with longitudinal edges of the elongated body extending laterally outwardly from the channel, the elongated body having an upwardly curved forward portion terminating in a leading tip, the longitudinal edges of the elongated body only in the upto present generally concave edge undersurfaces to the snow, whereby snow contacted by said edge undersurfaces is deflected away from occupants of a snowmowardly curved forward portion curving arcuately out- 5 bile when the latter is in motionwardly and downwardly adjacent the leading tip so as

Claims (7)

1. A snowmobile ski configured to reduce or eliminate the spraying of snow backwards onto occupants of a snowmobile and comprising an elongated body having a generally straight portion for riding upon the snow, an upwardly curved forward portion terminating in a leading tip, and opposed transversely extending longitudinal edges, the transverse edges solely on the upwardly curved forward portion of the ski having portions depending laterally downwardly near said leading tip to deflect snow away from occupants of said snowmobile when said snowmobile is in motion.
2. The ski as defined by claim 1 wherein said downwardly depending portions are arcuate in transverse cross section.
3. The ski as defined by claim 2 wherein said arcuate portion extends from said tip of said ski to a point approximately on the midpoint on the arc defining said upwardly curved forward portion.
4. The ski as defined by claim 3 wherein the radius of curvature of said arcuate portion increases from zero at said midpoint to 3 inches at said tip.
5. The ski as defined by claim 2 wherein said ski includes a central portion defining a longitudinal channel and each of said edge portions includes a said arcuate portion.
6. A snowmobile ski configured to reduce or eliminate the spraying of snow from the ski backwards onto occupants of a snowmobile and comprising an elongated ski body having an upwardly curved forward portion terminating in a leading tip, and opposed, transverse longitudinal edges arcuately curved transversely downwardly and outwardly to present generally concave surfaces to the snow, the arcuately curved longitudinal edges extending substantially to the leading tip of the ski, whereby snow contacted by the concave surfaces is deflected away from occupants of the snowmobile.
7. A snowmobile ski configured to reduce or eliminate the spraying of snow backwards onto occupants of a snowmobile and comprising a single, generally flat, unitary, elongated body having a generally U-shaped depression along its length and centrally of its width defining an elongated channel with longitudinal edges of the elongated body extending laterally outwardly from the channel, the elongated body having an upwardly curved forward portion terminating in a leading tip, the longitudinal edges of the elongated body only in the upwardly curved forward portion curving arcuately outwardly and downwardly adjacent the leading tip so as to present generally concave edge undersurfaces to the snow, whereby snow contacted by said edge undersurfaces is deflected away from occupants of a snowmobile when the latter is in motion.
US321120A 1973-01-05 1973-01-05 Snowmobile ski Expired - Lifetime US3871675A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4491333A (en) * 1982-08-23 1985-01-01 Yamaha Hatsudoki Kabushiki Kaisha Ski for snowmobile
US20030116932A1 (en) * 2001-11-20 2003-06-26 Kubota Takahiko Steering ski for snow vehicle
US20030234500A1 (en) * 2002-06-21 2003-12-25 Allen Roberts Snowmobile ski
US20050173873A1 (en) * 2004-02-05 2005-08-11 Ronald Ruzewski Steering ski for snow vehicle
US20060033294A1 (en) * 2002-06-21 2006-02-16 Allen Roberts Snowmobile ski

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3643978A (en) * 1969-12-09 1972-02-22 Russell C Westberg Ski flange
US3675939A (en) * 1970-03-02 1972-07-11 Dempco Snowmobile ski and blade construction
US3734523A (en) * 1970-09-11 1973-05-22 L Field Slalom sled

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3643978A (en) * 1969-12-09 1972-02-22 Russell C Westberg Ski flange
US3675939A (en) * 1970-03-02 1972-07-11 Dempco Snowmobile ski and blade construction
US3734523A (en) * 1970-09-11 1973-05-22 L Field Slalom sled

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4491333A (en) * 1982-08-23 1985-01-01 Yamaha Hatsudoki Kabushiki Kaisha Ski for snowmobile
US20030116932A1 (en) * 2001-11-20 2003-06-26 Kubota Takahiko Steering ski for snow vehicle
US7243927B2 (en) 2001-11-20 2007-07-17 Yamaha Hatsudoki Kabushiki Kaisha Steering ski for snow vehicle
US6991056B2 (en) * 2002-06-21 2006-01-31 Starting Line Products, Inc. Snowmobile ski
US20060033294A1 (en) * 2002-06-21 2006-02-16 Allen Roberts Snowmobile ski
US20060157943A1 (en) * 2002-06-21 2006-07-20 Allen Roberts Snowmobile ski
US20030234500A1 (en) * 2002-06-21 2003-12-25 Allen Roberts Snowmobile ski
US7311165B2 (en) 2002-06-21 2007-12-25 Starting Line Products, Inc. Snowmobile ski
US7311166B2 (en) * 2002-06-21 2007-12-25 Starting Line Products, Inc. Snowmobile ski
US20080246237A1 (en) * 2002-06-21 2008-10-09 Starting Line Products, Inc. Sway bar for snowmobiles
US20080271303A1 (en) * 2002-06-21 2008-11-06 Starting Line Products, Inc. Snowmobile ski
US7841089B2 (en) 2002-06-21 2010-11-30 Starting Line Products, Inc. Methods of manufacturing snowmobile skis
US20110042909A1 (en) * 2002-06-21 2011-02-24 Starting Line Products, Inc. Snowmobile skis having elongated wing members
US8915503B2 (en) 2002-06-21 2014-12-23 Starting Line Products, Inc. Snowmobile skis having elongated wing members
US20050173873A1 (en) * 2004-02-05 2005-08-11 Ronald Ruzewski Steering ski for snow vehicle
US7232134B2 (en) 2004-02-05 2007-06-19 Yamaha Motor Corporation, U.S.A. Steering ski for snow vehicle

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