초록 ▼

A support structure for a car safety seat for installation on an extensible and retractable stroller includes a front frame, a rear frame, a handle grip and a support frame. The support structure includes a first and a second support member mounted on the support frame for supporting the weight of a

A support structure for a car safety seat for installation on an extensible and retractable stroller includes a front frame, a rear frame, a handle grip and a support frame. The support structure includes a first and a second support member mounted on the support frame for supporting the weight of a car safety seat. The first support member is stationary. The second support member has two ends engaged respectively with first and second rotary disks which are turnable about the same axis and which maintain a fixed distance with the first support member. By turning the second support member, the relative distance between the first and second support member may change thereby to support car safety seats of different sizes.

대표청구항 ▼

A support structure for a car safety seat for installation on an extensible and retractable stroller includes a front frame, a rear frame, a handle grip and a support frame. The support structure includes a first and a second support member mounted on the support frame for supporting the weight of a

A support structure for a car safety seat for installation on an extensible and retractable stroller includes a front frame, a rear frame, a handle grip and a support frame. The support structure includes a first and a second support member mounted on the support frame for supporting the weight of a car safety seat. The first support member is stationary. The second support member has two ends engaged respectively with first and second rotary disks which are turnable about the same axis and which maintain a fixed distance with the first support member. By turning the second support member, the relative distance between the first and second support member may change thereby to support car safety seats of different sizes. ngaging a projecting edge of said cylindrical support member. 9. The vehicle of claim 5, wherein said wheel assemblies further comprise: means for selectively pivoting said caster pivot and said roller wheel inwardly towards an interior of said cylindrical support member, so as to provide clearance for sliding said annular patch over said cylindrical support and said bladder thereon. 10. A vehicle for transporting and installing an annular patch in a pipeline having a cylindrically curved inside surface, said vehicle comprising: a tubular support member having a substantially cylindrical exterior and a hollow interior; an annular bladder mounted on said cylindrical exterior of said tubular support member for forcing said patch against said inside surface of a pipeline in response to inflation of said bladder; at least first and second pivoting wheel assemblies mounted at each end of said tubular support member, said wheel assemblies at each end of said tubular support member being mounted at angularly spaced locations so as to define an included angle between said wheel assemblies, each said wheel assembly comprising: a caster pivot mounted to said tubular support member so as to define a pivot axis that extends substantially radially from said tubular support member; and a roller wheel mounted to said caster pivot so as to pivot about said radially extending axis, so that said roller wheel is aligned substantially normal to said cylindrically curved inside surface of said pipeline when bearing thereon; and at least one ballast weight mounted inside said tubular support member within said included angle between said wheel assemblies, so as to maintain said vehicle in an upright orientation as said vehicle moves longitudinally through said pipeline. 11. The vehicle of claim 10, wherein said ballast weight comprises: at least one bar weight mounted lengthwise inside a bottom of said tubular support member. 12. The vehicle of claim 10, wherein said tubular support member comprises a length of cylindrical pipe. 13. The vehicle of claim 12, wherein said wheel assemblies further comprise: means for detachably mounting said wheel assemblies to said tubular support member, so that said wheel assemblies are selectively removeable so as to provide clearance for sliding said annular patch over said tubular support and said bladder thereon. 14. The vehicle of claim 13, wherein said means for detachably mounting said wheel assemblies to said tubular support member comprises: a clamp portion on each wheel assembly for selectively engaging an edge of said length of cylindrical pipe. 15. The vehicle of claim 14, wherein said clamp portion on each wheel assembly comprises: upper and lower jaw member for receiving an edge of said length of pipe therein, said lower jaw member comprising: a curved upper surface for matching said cylindrical exterior of said pipe so as to from a stable interfit therewith; and a flat lower surface to which said caster pivot is mounted so that said pivot axis extends perpendicularly thereto, said lower surface of said jaw member extending tangentially to said cylindrical outer surface of said pipe so as to align said pivot axis in a radial direction relative to said pipe. 16. The vehicle of claim 12, wherein said wheel assemblies further comprise: means for selectively pivoting said caster pivot and said roller wheel inwardly towards an interior of said tubular support member, so as to provide clearance for sliding said annular patch over said tubular support member and said inflatable bladder therefrom. 17. The vehicle of claim 16, wherein said means for selectively pivoting said caster pivot and said roller wheel inwardly comprises: a first bracket member mounted to an inside lip of said pipe; a second bracket member having said caster pivot and said roller wheel mounted thereto; and a hinge interconnecting said first and second bracket members so that said seco