Wind machine with reciprocating blade means

• US 3,995,972 A
• Filed: 07/07/1975
• Issued: 12/07/1976
• Est. Priority Date: 07/07/1975
• Status: Expired due to Term

• Current Assignee: Esam M. Nassar
• Original Assignee: Esam M. Nassar
• Inventors: Nassar, Esam M.
• Primary Examiner(s): Powell, Jr., Everette A.
• Application Number:
  US05/593,526
• Time in Patent Office: 519 Days
• Field of Search: 416/83, 416/23, 416/24, 416/64-66, 416/68, 416/98, 416/79, 416/80, 416/82, 415/125, 415/141, 417/436
• US Class Current: 416/68
• CPC Class Codes: F03D 5/06 the wind-engaging parts swinging to-and-fro and not rotating
• CPC Class Codes: Y02B 10/30 Wind power
• CPC Class Codes: Y02E 10/70 Wind energy

Abstract

An apparatus is provided for converting an air flow into useful mechanical work by means of a reciprocating blade means. The preferred blade means comprises a plurality of lightweight, airfoil shaped blades mounted in a stack for moving a carrier associated therewith along a rectilinear path. A reversing means reverses the angle of attack of the blade at each end of the carrier travel. The wind machine is generally of rectangular shape and can be readily used in combination with high-rise buildings to provide a useful work output.

Claims

1. A reciprocating wind apparatus comprising

a support,

a carrier guided for reciprocating movement on said support,

at least one elongated blade having a longitudinally extending axis and a leading longitudinally extending edge for facing the wind, pivot means on said carrier pivotally mounting said blade for free turning by the wind about said longitudinal axis and relative to said carrier to present one side to the wind when driving said carrier in a first direction and to present the other side of said blade to the wind when driving said carrier in the opposite direction, a variable angle of attack of the blade being determined by the wind, means on said carrier limiting the maximum amount of turning of the blade by the wind about its longitudinal axis, and

means associated with said support for turning said blade about its longitudinal axis to present its opposite side to the wind and to cause a reversal in the direction of carrier travel.

2. A wind apparatus in accordance with claim 1 in which said blade is in the shape of an airfoil and in which said sides of said airfoil blade are symmetrically shaped.

3. An apparatus in accordance with claim 1 in which a plurality of blades are mounted adjacent each other in said carrier with said longitudinal axes of each said blades being substantially parallel.

4. An apparatus in accordance with claim 3 in which said reversing means comprises a first stop positioned to engage said blade when said carrier near its end of a travel in the first direction and a second stop positioned to engage said blade when said carrier is near its travel in the opposite direction.

5. An apparatus in accordance with claim 4 in which each of said stops includes a spring means being flexed to store energy during the stopping of said blades and carrier and imparting the stored energy to said blades and carrier to assist in turning the same.

6. An apparatus in accordance with claim 1 in which a plurality of blades are provided to form a blade stack, said blades being formed of a molded plastic to provide light weight blades.

7. An apparatus in accordance with claim 1 in which cooperating slide means are formed on said carrier and on said support guiding said carrier for rectilinear travel.

8. An apparatus in accordance with claim 1 in which a plurality of blades are mounted on said carrier and said carrier is guided for horizontal travel.

9. An apparatus in accordance with claim 1 in which a plurality of blades are mounted on said carrier and the latter travels in a vertical direction.