초록 ▼

An telescopic ladder for a vehicle. The telescopic ladder comprises a first ladder section and a second ladder section, with each ladder section comprising a front portion and a rear portion and each including opposing sides extending from the front portion to the rear portion. The second ladder sec

An telescopic ladder for a vehicle. The telescopic ladder comprises a first ladder section and a second ladder section, with each ladder section comprising a front portion and a rear portion and each including opposing sides extending from the front portion to the rear portion. The second ladder section is configured to telescopically extend from the first ladder section. The telescopic ladder further includes an extension support for facilitating the extension of the second ladder section from the first ladder section. The extension support includes at least one front roller assembly positioned adjacent to a front portion of the first ladder section, at least one pair of side roller assemblies positioned on the sides of the first ladder section, and at least one pair of cam-follower assemblies positioned on the sides of the second ladder section adjacent to the rear portion of the second ladder section.

대표청구항 ▼

1. A firefighting vehicle comprising: a vehicle body;a telescopic ladder attached to said vehicle body, wherein said telescopic ladder includes a first ladder section and a second ladder section, with said second ladder section being configured to telescopically extend from said first ladder section

1. A firefighting vehicle comprising: a vehicle body;a telescopic ladder attached to said vehicle body, wherein said telescopic ladder includes a first ladder section and a second ladder section, with said second ladder section being configured to telescopically extend from said first ladder section; andan extension support for facilitating the extension of said second ladder section with respect to said first ladder section, wherein said extension support provides for said second ladder section to extend from said first ladder section while experiencing a coefficient of friction of less than 0.10, wherein said extension support comprises one or more front roller assemblies secured to a front portion of said first ladder section, wherein said front roller assemblies include front rollers configured to allow said second ladder section to roll over said front roller assemblies, and wherein said front rollers are formed from polyurethane. 2. The firefighting vehicle of claim 1, wherein said front roller assemblies further include one or more elastic devices configured to allow each of said front rollers of said front roller assemblies to maintain simultaneous contact with said second ladder section. 3. The firefighting vehicle of claim 2, wherein said elastic devices comprise Belleville springs. 4. The firefighting vehicle of claim 1, wherein said extension support comprises two or more laterally-aligned side roller assemblies located on opposite sides of said first ladder section, and wherein said second ladder section is configured to roll between said side roller assemblies. 5. The firefighting vehicle of claim 4, wherein the second ladder section comprises base rails and where in the base rails of said second ladder section are configured to contact said side roller assemblies as said second ladder section extends or retracts from said first ladder section, such that said side roller assemblies provide lateral support for said second ladder section. 6. The firefighting vehicle of claim 4, wherein said side roller assemblies each comprise a side roller and a position adjustment mechanism, and wherein said position adjustment mechanism is configured to adjust said side roller inward and outward with respect to a longitudinal centerline of said first ladder section. 7. The firefighting vehicle of claim 4, wherein said second ladder section comprises base rails and wherein said side roller assemblies each comprise an overturning restraint configured to overhang at least a portion of a base rail of said second ladder section. 8. The firefighting vehicle of claim 1, wherein said extension support comprises a cam-follower assembly located on each side of a rear portion of said second ladder section. 9. The firefighting vehicle of claim 8, wherein said first ladder section includes cam-follower tracks formed on interior-facing sides of base rails of said first ladder section, and wherein at least a portion of said cam-follower assemblies are configured to be received in said cam-follower tracks, such that said cam-follower assemblies are operable to translate along said cam-follower tracks. 10. The firefighting vehicle of claim 9, wherein said cam-follower assemblies each comprises a pair of cam-followers, and wherein said cam-follower assemblies are each rotatably mounted to the sides of the second ladder section, such that the cam-followers of each cam-follower assembly are operable to maintain simultaneous contact with said first ladder section. 11. The firefighting vehicle of claim 1, wherein said extension support provides for said second ladder section to extend from said first ladder section while experiencing a coefficient of friction of less than 0.05. 12. The firefighting vehicle of claim 11, wherein said extension support provides for said second ladder section to extend from said first ladder section, while experiencing a coefficient of friction of less than 0.05, without the use of grease or liquid lubrication.