A service cart (100) includes a supporting frame (10) and a fixing shelf (20) secured to the supporting frame and a movable shelf (30). The movable shelf is movably secured to the supporting frame and located below the fixing shelf. The movable shelf can move horizontally relative to the supporting
A service cart (100) includes a supporting frame (10) and a fixing shelf (20) secured to the supporting frame and a movable shelf (30). The movable shelf is movably secured to the supporting frame and located below the fixing shelf. The movable shelf can move horizontally relative to the supporting frame to extend out of the supporting frame a distance from any of two opposite lateral sides of the service cart.
대표청구항▼
What is claimed is: 1. A service cart comprising: a supporting frame; a fixing shelf secured to the supporting frame; two guideways respectively fixed at two opposite sides of the supporting frame, wherein each of the guideways is enclosed by an elongated first slideway and an elongated angle iron,
What is claimed is: 1. A service cart comprising: a supporting frame; a fixing shelf secured to the supporting frame; two guideways respectively fixed at two opposite sides of the supporting frame, wherein each of the guideways is enclosed by an elongated first slideway and an elongated angle iron, the first slideway has a U-shaped cross section and an open side oriented toward the fixing shelf, and the angle iron has an L-shaped cross section with an open side oriented away from the fixing shelf and is coupled to the open side of the first slideway; and a movable shelf movably mounted to the supporting frame and located below the fixing shelf, wherein the movable shelf comprises two second slideways respectively formed at two opposite sides thereof, and the two second slideways are respectively movably engaged in the two guideways and can move horizontally along the guideways to extend out of the supporting frame along any of two opposite directions of the service cart. 2. The service cart as claimed in claim 1, wherein each of the guideways comprises two pulleys pivotally secured at two ends of the first slideway thereof, respectively, each second slideway comprises a pulley pivotally secured in a midway thereof, and the pulley of the each second slideway is located between and moveable between the pulleys of the first slideway of a corresponding guideway. 3. The service cart as claimed in claim 2, wherein each second slideway defines two holes corresponding to the pulleys of the first slideway of the corresponding guideway for partly receiving the pulleys of the first slideway, and the first slideway of each of the guideways defines a hole in a midway corresponding to the pulley of a corresponding second slideway for partly receiving the pulley of the corresponding second slideway therein. 4. The service cart as claimed in claim 1 further comprising a second movable shelf, wherein the fixing shelf, the movable shelve, and the second movable shelve are secured to the supporting frame in order along a vertical direction from a top to a bottom. 5. The service cart as claimed in claim 1, wherein the supporting frame comprises four vertical posts and at least one connecting rack connecting the posts together. 6. The service cart as claimed in claim 5, wherein the at least one connecting rack has a rectangular configuration and comprises four steel bars and four steel loops at four corners respectively, and the steel bars connected by the steel loops cooperatively define the rectangular configuration. 7. A service cart comprising: a supporting frame having four posts spaced from each other and at least one connecting rack connecting the posts together; a fixing shelf secured to a top portion of the supporting frame and over the at least one connecting rack; two first slideways respectively fixed at two opposite sides of the at least one connecting rack, each of the first slideways comprising an elongated horizontal side, and inner and outer vertical sides respectively extending up from inner and outer lateral edges of the horizontal side towards the fixing shelf, the inner and outer vertical sides cooperatively enclosing a groove opening upwardly; at least one movable shelf movably secured to the at least one connecting rack of the supporting frame, the at least one movable shelf comprising two second slideways respectively formed at two opposite sides thereof and movably engaged in the grooves of the first slideways, wherein the at least one movable shelf can move horizontally relative to the at least one connecting rack of the supporting frame to move out of the supporting frame a distance along any of two opposite side directions of the service cart. 8. The service cart as claimed in claim 7, wherein the at least one connecting rack has a rectangular configuration and comprises four steel bars and four steel loops at four corners respectively, and the steel bars connected by the steel loops cooperatively define the rectangular configuration. 9. The service cart as claimed in claim 8, wherein the steel loops each define a through hole for a corresponding one of the posts to extend therethrough. 10. The service cart as claimed in claim 8, wherein two ends of the outer vertical side of each first slideway are respectively secured to outer surfaces of two steel loops. 11. The service cart as claimed in claim 10, further comprising an L-shaped angle iron, coupled to each first sildeway to form a guideway, the angle iron comprising a first elongated wall secured to the outer vertical side of the first slideway and a second elongated wall over the groove. 12. The service cart as claimed in claim 11, wherein each of the guideways further comprises two pulleys pivotally securing the two ends of the outer vertical side of the first slideway to the outer surfaces of the two steel loops, respectively, and the second slideway comprises a pulley pivotally secured in a midway thereof. 13. The service cart as claimed in claim 12, wherein the second slideway defines two holes corresponding to the pulleys of each of the guideways for partly receiving the pulleys of a corresponding guideway, and each of the guideways defines a hole in a midway corresponding to the pulley of the second slideway for partly receiving the pulley of the second slideway. 14. The service cart as claimed in claim 8 further comprising a second connecting rack and a second movable shelf movably secured to the second connecting rack, wherein the fixing shelf and the two movable shelves are secured to the supporting frame in order along a vertical direction from a top to a bottom.
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이 특허에 인용된 특허 (31)
Dickinson Thomas ; Gale Bradley D., Adjustable shelving apparatus.
Fitzgerald, Robert M.; Joiner, Kyle; Broom, Ward P., Methods and apparatus for inserting a cart, such as a cart with one or more fixed wheels, into an enclosure.
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