Robert William Rose

US Patent:

41634748, Aug 7, 1979

Filed:

Jun 9, 1977

Appl. No.:

5/805063

Inventors:

Robert D. MacDonald - Phoenix AZ
Robert K. Rose - Burnt Hills NY
John W. Papsdorf - Lake Orion MI

Assignee:

E. I. Du Pont de Nemours and Company - Wilmington DE

International Classification:

F28F 140

US Classification:

165179

Abstract:

Fluid-carrying tubes for a heat exchanger are provided with internal longitudinal fins formed separately from the tube itself. One form utilizes individual elongated V-shaped strips biased radially outwardly by an annular sheet metal spring, with the tips of the fins brazed to the inner surface of the tube wall. Second and third embodiments utilize a one-piece corrugated sheet metal cylinder rather than individual strips, but with adjacent fins being almost completely severed from each other to provide sharp edge contact between the tips of the fins and the tube wall for optimum brazing. Either the fins or tube inner wall is clad with a lower-melting point material which permits furnace brazing of the fin tips to the tube wall. All three forms have longitudinally spaced holes and slots to enhance heat exchange by inducing transverse fluid flow through the fins and to allow liquid levels to equalize.

US Patent:

60619848, May 16, 2000

Filed:

Jul 30, 1998

Appl. No.:

9/126563

Inventors:

Robert L. Rose - Phoenix AZ

International Classification:

E04C 252

US Classification:

522201

Abstract:

A plurality of struts extend upwardly from a subfloor and a plurality of racks interconnect selected rows of struts for supporting transmission lines and/or conduits. Each strut is formed of four orthogonally oriented C-channels having the edge of each leg curled inwardly to define a lip extending toward the base and each rack includes a similar C-channel. Each end of each rack is detachably attached to a C-channel of a strut by a bolt penetrating a plate at the rack end and threadedly engaging a nut captured in the C-channel of the strut. The transmission lines and conduits are secured to any of the C-channels of the struts and the racks by clamps having distal ends of two sections captured by the respective C-channel and an attachment mechanism securing the proximal ends of the sections to one another to retain the transmission lines and conduit clamped between the two sections. Disassembly of the transmission lines and conduits from the respective C-channels and disassembly of the racks from the struts involves unsecuring the proximal ends of each clamp from one another and withdrawing the distal ends of each clamp from the C-channel and disengaging the bolt from the captured nut.