Ski construction

Claim 2

A recreational board construction comprising in combination: an elongated core member including hollow tubular elements with connecting web elements retaining the tubular elements in parallel spaced relationship, elongated open corrugations between said tubular elements, a filler material means in the open corrugations, for controlling the torsional response of the board, a planar bottom element, and an adhesive bonding medium securing the bottom element to the bottom surface of the core member.

Claim 3

A ski comprising in combination: an elongated core member including longitudinally extending hollow tubular elements with connecting web elements retaining the tubular elementS in parallel spaced relationship, longitudinally extending open corrugations between the tubular elements, a filler material means in at least one of the open corrugations for controlling the torsional response of the ski, a bottom element extending along the length of the core member, and means securing the bottom element to a bottom surface of the core member.

Claim 4

A ski comprising in combination: an elongated core member including longitudinally extending hollow tubular elements with connecting web elements retaining the tubular elementS in parallel spaced relationship, longitudinally extending open corrugations between the tubular elements, a filler material means in at least one of the open corrugations for controlling the torsional response of the ski, a bottom element extending along the length of the core member, and means securing the bottom element to a bottom surface of the core member.

Claim 5

The ski of claim 2 wherein said core member is made of a fiber reinforced plastic material.

Claim 6

The ski of claim 3 wherein said filler material is a foam.

Claim 7

The ski of claim 4 wherein said bottom element is made of a high molecular weight polyethylene material.

Claim 8

The ski of claim 5 wherein said bonding medium is fiber reinforced.

Claim 9

The ski of claim 2 wherein said core member is comprised of a pair of corrugated sheets disposed in opposed facing relationship so as to define the longitudinally extending tubular elements and open corrugations, and further including a layer of bonding material between the corrugated sheets securing the corrugated sheets in facing relationship.

Claim 10

The ski of claim 7 wherein said core member further includes open socket portions along opposite sides thereof, and sidewall members retained in said socket portions to extend along the length of the core member.

Claim 11

The ski of claim 8, further including a metal plate between the corrugated sheets extending along a limited portion of the length of the corrugated sheets at the approximate longitudinal center of the corrugated sheets.

Claim 12

The ski of claim 8 wherein said tubular elements are of hexagonal transverse cross-section.

Claim 13

The ski of claim 8 wherein said tubular elements are of substantially circular transverse cross-section.

Claim 14

The ski of claim 7 wherein said web elements are formed from flat web sections on each corrugated sheet and wherein the web sections are secured together by said layer of bonding material.

Claim 15

A ski construction comprising in combination: an elongated fiber reinforced semi-rigid plastic core member having a pair of corrugated sheets disposed in opposed facing relationship and defining a plurality of longitudinally extending hollow tubular elements of hexagonal transverse cross-section with integral connecting web elements retaining the tubular elements in parallel spaced relationship and a plurality of longitudinally extending corrugations between the tubular elements, the longitudinal side edges of the core member having continuous longitudinally extending sockets opening through the side of the core member, a semi-rigid synthetic foam material in the longitudinally extending corrugations of the core member, a high molecular weight polyethylene planar bottom element extending along the length of the core member, steel running edges extending along opposite sides of the bottom element, a glass reinforced bonding medium securing the bottom element and the running edges to a bottom surface of the core member, thermal plastic sidewall members received in said longitudinally extending sockets of the core member, and a plastic top sheet bonded to a top surface of the core member.

Claim 16

A ski construction comprising in combination: an elongated fiber reinforced semi-rigid plastic core member having a pair of corrugated sheets disposed in opposed facing relationship and defining a plurality of longitudinally extending hollow tubular elements of hexagonal transverse cross-section with integral connecting web elements retaining the tubular elements in parallel spaced relationship and a plurality of longitudinally extending corrugations between the tubular elements, the longitudinal side edges of the core member having continuous longitudinally extending sockets opening through the side of the core member, a semi-rigid synthetic foam material in the longitudinally extending corrugations of the core member, a high molecular weight polyethylene planar bottom element extending along the length of the core member, steel running edges extending along opposite sides of the bottom element, a glass reinforced bonding medium securing the bottom element and the running edges to a bottom surface of the core member, thermal plastic sidewall members received in said longitudinally extending sockets of the core member, and a plastic top sheet bonded to a top surface of the core member.