David M Eldridge

US Patent:

40504760, Sep 27, 1977

Filed:

Jul 10, 1972

Appl. No.:

5/277455

Inventors:

Paul F. Hayner - Lexington MA
David G. Eldridge - Nashua NH
Edgar R. Bernier - Nashua NH
Richard B. Henderson - Nashua NH

Assignee:

Sanders Associates, Inc. - Nashua NH

International Classification:

F15B 13042
F16K 1107

US Classification:

13762562

Abstract:

A fluid flow control valve which includes a body formed to define a chamber having inlet, outlet and actuating ports for supplying and receiving fluid to and from external hydraulic machinery to be actuated and including a valve spool formed with several lands and slidably arranged in the chamber for controlling the flow of fluid through the ports, in which the lands and ports are located and arranged so that some of said ports transmit fluid only from said chamber outward while the remainder of the ports transmit fluid only from the ports into the chamber, and which also includes a matrix of restrictors interposed in each of those ports which transmits fluid outward from the chamber, and in which the lands are arranged to control the flow of fluid through only those ports which transmit fluid outward while leaving the flow of fluid into the chamber through the remaining ports unimpeded for all positions of the spool.

US Patent:

43886825, Jun 14, 1983

Filed:

Sep 4, 1979

Appl. No.:

6/071911

Inventors:

David P. Eldridge - Acton MA

Assignee:

Raytheon Company - Lexington MA

International Classification:

G06F 920

US Classification:

364200

Abstract:

An instruction translator which translates an instruction to a sequence of microinstruction addresses. The position and size of fields from the instruction translated into a particular next microinstruction address are determined by fields in the currently executing microinstruction. Different instruction sets may be executed by reprogramming the microinstructions.