초록 ▼

The present invention provides an improved telescopic mast structure for a hydraulically operated lift truck. The mast structure of the present invention has reeved hydraulic hoses which do not obstruct the operators view and a chain connecting the inner and outer telescopic sections so that inner t

The present invention provides an improved telescopic mast structure for a hydraulically operated lift truck. The mast structure of the present invention has reeved hydraulic hoses which do not obstruct the operators view and a chain connecting the inner and outer telescopic sections so that inner telescopic section moves at twice the speed of the outer telescopic section. This chain is located inside a U shaped channel element that forms the mast mainframe. The U shaped channel that forms the mast mainframe fits around the I shaped elements that support the two telescopic sections and the chain interconnecting the telescopic sections is in front of the I member of the outer telescopic section and alongside of the front part of the I member of the inner telescopic section. The chain interconnecting the telescopic sections is therefore in a protected location and most important it does not add any length to the vehicle.

대표청구항 ▼

A lift truck with an improved telescopic mast structure comprising: a U shaped mast base mainframe section, an I shaped outer telescopic mast section movably positioned inside said U shaped mast base section, an I shaped inner telescopic mast section movably positioned inside said outer telescopic m

A lift truck with an improved telescopic mast structure comprising: a U shaped mast base mainframe section, an I shaped outer telescopic mast section movably positioned inside said U shaped mast base section, an I shaped inner telescopic mast section movably positioned inside said outer telescopic mast section, a fork carriage mounted on said inner telescopic section, a hydraulic cylinder on said fork carriage, hydraulic hoses connected to said base mainframe section and to said cylinder, said hoses being reeved to move with said mast sections, a chain connecting the inner and outer telescopic sections so that inner telescopic section moves at twice the speed of the outer telescopic section, said chain being located inside said U shaped channel element that forms the mast mainframe and in front of the I member of the outer telescopic section and alongside of the front part of the I member of the inner telescopic section, whereby the chain is in a protected location and it does not add any length to the truck.