Non-conventional reciprocating hydraulic-electric power source

• US 4,473,751 A
• Filed: 02/12/1982
• Issued: 09/25/1984
• Est. Priority Date: 02/12/1982
• Status: Expired due to Term

• Current Assignee: HR Textron, Inc.
• Original Assignee: HR Textron, Inc.
• Inventors: Coakley, James L., Rombach, James C.
• Primary Examiner(s): Rubinson, G. Z.
• Assistant Examiner(s): Duncanson, Jr., W. E.
• Application Number:
  US06/348,376
• Time in Patent Office: 956 Days
• Field of Search: 290/1 R, 91/339, 91/349
• US Class Current: 290/1.00R
• CPC Class Codes: F03C 1/12 mechanically

Abstract

A non-conventional electric power source including a reciprocating hydraulically powered ram coupled to an electric generator. A pair of matched nozzles coupling a hydraulic fluid supply to the ram. Reciprocation of the ram is effected by a flapper disposed between the nozzles which alternatingly cuts off hydraulic fluid flow through the nozzles responsive to the ram approaching its travel limit.

Claims

1. Apparatus for converting hydraulic energy to electrical energy comprising:

(A) a reciprocating hydraulically powered ram;

(B) electrical generator means coupled to said ram;

(C) a supply of hydraulic fluid under pressure;

(D) means coupling said fluid supply to said ram through alternative flow paths for effecting reciprocation of said ram responsive to said ram approaching the limit of its travel including;

(1) a pair of matching nozzles,

(2) flapper means disposed between said nozzles for alternately blocking one of said nozzles and thereby one of said flow paths while permitting fluid to flow from said supply through the other of said flow paths,

(3) a pair of mated restriction orifices, one of which is disposed in each of said fluid flow paths downstream of each of said matched nozzles, and

(4) one end of said flapper engaging said ram for moving said flapper from a position blocking one of said nozzles to a position blocking the other of said nozzles as said ram approaches the limit of its travel, said flapper moving from its blocking engagement with one nozzle into blocking engagement with the other nozzle by snap action.

2. Apparatus as defined in claim 1 wherein said electrical generator means includes a magnetic flux path means defining a gap therein, an armature means positioned in said gap to provide a pair of working gaps in said magnetic flux path means, a permanent magnet affixed to said magnetic flux path means for providing substantially equal magnetic flux through each working gap when said armature is symmetrically positioned within said gap, and a coil positioned adjacent each said working gap.

3. Apparatus as defined in claim 1 wherein said flapper means is a cantilevered flapper having a reduced area midsection to provide a flexure pivot to enable said snap action.

4. Apparatus as defined in claim 3 wherein said ram includes a pair of spaced apart pistons with one end of said flapper disposed therebetween.

5. Apparatus as defined in claim 1 wherein said electrical generator means includes a magnetic flux path means defining a gap therein, armature means positioned in said gap, a permanent magnet affixed to said magnetic flux path means for providing magnetic flux therein and in said gap, means coupling said armature to said ram for reciprocation of said armature in said gap, and a coil positioned adjacent said path for generating electric power as the flux in said path varies because of armature reciprocation.