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US 6,685,072 B2Granted
Knapsack having a back wall formed with spacers
AssigneeChin-Lien Ho
InventorChin-Lien Ho
Life of this patent
Estimating the term…
Abstract
A knapsack is made of a hard thermoplastic material and is molded into a single-piece construction. The knapsack has a rear wall surface facing toward a user's back and formed with a plurality of spacers to result in a spacing between the rear wall surface and the user's back. As a result, the knapsack does not attach closely to the user's back and, therefore, permits air ventilation and can provide a massaging effect.
Claims3
A knapsack comprising:
- a sack body defining an accommodation space for receiving articles therein, and including a back wall which has a front wall surface confronting said accommodation space, and a rear wall surface opposite to said front wall surface and adapted to face toward a user's back;
- and
- a plurality of spacers which are disposed on said rear wall surface, which are spaced apart from each other, and which extend away from said front wall surface so as to space said rear wall surface apart from the user's back, said spacers being molded integrally with said back wall to form a single-piece construction;
- wherein said spacers are generally hemispherical.
1 more element
Dependencies are inferred from the claim text.