Patent US3879047A successfully refreshed from Google Patents.
US3879047A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ice ski
Assignee: Individual
•
Filing: 1974-01-17
•
Granted: 1975-04-22
•
Expires: 1994-01-17
Abstract
Abstract An ice ski consisting of an elongated body having an ice contacting lower surface and bindings for securing the ski to the user''s foot. The elongated body defines a toe portion, a heel portion and an intermediate portion extending between the heel and toe portion. An adjustable elongated, laterally extending blade member is carried at the heel portion of the body which is normally out of contact with the ice surface but which is brought into contact with the ice surface for braking and turning the body responsive to weight shifts of the user. The lower surface of the body is provided with a transverse fulcrum adjacent the heel portion and a pair of longitudinally extending fulcrums along the intermediate portion of the body for rocking the body around axes parallel to the longitudinal axis of the body and around an axis perpendicular to the longitudinal axis of the body. By controlled rocking of the body by the user, the blade member is controllably brought into contact with the ice surface.
Inventors
- 👤 John D Macdonald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:15
CPC Classifications
A; A63; A63C; A63C1/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
180 words
An ice ski comprising: an elongated body, the longitudinal and transverse dimensions of which are substantially the same dimensions as the foot of a user having a front end defining a toe portion, a rear end defining a heel portion, an intermediate portion extending between the toe portion and the heel portion, and further including; a substantially flat upper surface for carrying one foot of a skier; a planar lower surface, for contacting an ice surface, at least a portion of said lower surface of the heel portion of said body being longitudinally inclined rearwardly, upwardly to define a fulcrum on said lower surface at the juncture of the heel portion and the intermediate portion about which said body is rocked to move the heel portion relative to the ice surface; and means on said lower surface of the heel portion for engaging the ice surface to control the direction and speed of said ice ski responsive to the position of the plane of said lower surface of the heel portion in relation to the plane of said ice surface.
Claim 2
Dependent Claim
180 words
An ice ski comprising: an elongated body, the longitudinal and transverse dimensions of which are substantially the same dimensions as the foot of a user having a front end defining a toe portion, a rear end defining a heel portion, an intermediate portion extending between the toe portion and the heel portion, and further including; a substantially flat upper surface for carrying one foot of a skier; a planar lower surface, for contacting an ice surface, at least a portion of said lower surface of the heel portion of said body being longitudinally inclined rearwardly, upwardly to define a fulcrum on said lower surface at the juncture of the heel portion and the intermediate portion about which said body is rocked to move the heel portion relative to the ice surface; and means on said lower surface of the heel portion for engaging the ice surface to control the direction and speed of said ice ski responsive to the position of the plane of said lower surface of the heel portion in relation to the plane of said ice surface.
Claim 3
Dependent Claim
180 words
An ice ski comprising: an elongated body, the longitudinal and transverse dimensions of which are substantially the same dimensions as the foot of a user having a front end defining a toe portion, a rear end defining a heel portion, an intermediate portion extending between the toe portion and the heel portion, and further including; a substantially flat upper surface for carrying one foot of a skier; a planar lower surface, for contacting an ice surface, at least a portion of said lower surface of the heel portion of said body being longitudinally inclined rearwardly, upwardly to define a fulcrum on said lower surface at the juncture of the heel portion and the intermediate portion about which said body is rocked to move the heel portion relative to the ice surface; and means on said lower surface of the heel portion for engaging the ice surface to control the direction and speed of said ice ski responsive to the position of the plane of said lower surface of the heel portion in relation to the plane of said ice surface.
Claim 4
Dependent Claim
180 words
An ice ski comprising: an elongated body, the longitudinal and transverse dimensions of which are substantially the same dimensions as the foot of a user having a front end defining a toe portion, a rear end defining a heel portion, an intermediate portion extending between the toe portion and the heel portion, and further including; a substantially flat upper surface for carrying one foot of a skier; a planar lower surface, for contacting an ice surface, at least a portion of said lower surface of the heel portion of said body being longitudinally inclined rearwardly, upwardly to define a fulcrum on said lower surface at the juncture of the heel portion and the intermediate portion about which said body is rocked to move the heel portion relative to the ice surface; and means on said lower surface of the heel portion for engaging the ice surface to control the direction and speed of said ice ski responsive to the position of the plane of said lower surface of the heel portion in relation to the plane of said ice surface.
Claim 5
Dependent Claim
69 words
The ice ski as defined in claim 1, wherein said means for engagIng the ice surface comprises a laterally disposed depending blade member carried by the heel portion of said body and extending beyond said lower surface at the heel portion, said blade member being normally out of contact with the ice surface and being moved into engagement therewith as said heel portion is rocked toward the ice surface.
Claim 6
Dependent Claim
152 words
The ice ski as defined in claim 2 wherein said depending blade member comprises a rectangular body having a substantially planar front face, a rear face provided with a pair of spaced-apart rearward extensions defining therebetween a threaded semi-cylindrical surface disposed perpendicularly to said upper surface of the heel portion and a blade edge extending beyond said lower surface of the heel portion of said body; an elongated slot in the heel portion of said body located rearwardly of said transverse fulcrum, said elongated slot communicating between said upper surface and said lower surface and conforming to the shape of said blade member for slidably containing said blade member therein; and a threaded shaft journaled in the heel portion of said body, said threaded shaft engaging the threaded semi-cylindrical surface of said rear face of said blade member for adjusting the extension of said blade edge with respect to said lower surface.
Claim 7
Dependent Claim
26 words
The ice ski as defined in claim 2 further including means for vertically adjustably carrying said depending blade member at said heel portion of said body.
Claim 8
Dependent Claim
36 words
The ice ski as defined in claim 1, wherein said lower surface at the intermediate portion of said body is longitudinally downwardly inclined with respect to said upper surface in a direction toward the heel portion.
Claim 9
Dependent Claim
86 words
The ice ski as defined in claim 1, wherein said lower surface of the intermediate portion of said body in a cross-section transverse to the longitudinal axis defines a substantially flat central area and edge areas inclined outwardly, upwardly with respect to said upper surface to form a pair of longitudinally extending fulcrums at the junction of said central area and said edge areas for rocking said body about axes parallel to the longitudinal axis of said body responsive to a weight shift by the skier.
Claim 10
Dependent Claim
18 words
The ice ski as defined in claim 1, wherein said body in plan configuration defines an elliptical plinth.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-21 | 1978-10-21 | 1979-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-21 | 1982-10-21 | 1983-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-21 | 1986-10-21 | 1987-04-22 | $7700.00 | Window Closed / Lapsed |