Marvin H Echols

US Patent:

39464555, Mar 30, 1976

Filed:

May 15, 1974

Appl. No.:

5/470265

Inventors:

Marvin Echols - Houston TX
Ralph H. Stockton - Bellaire TX

International Classification:

B08B 904

US Classification:

1510406R

Abstract:

A cleaning device for heat exchanger tubes comprising a rubbing body consisting of a hollow casing member of elastomeric material with diametrical openings, and an encased check ball. A thickened band extends intermediately around the casing member for rubbing against the tube wall and is provided with slots enhancing the flexibility of the band. The overall density of the device approximates that of the liquid with which it is to be used.

US Patent:

41200837, Oct 17, 1978

Filed:

Dec 6, 1976

Appl. No.:

5/747726

Inventors:

Marvin C. Echols - Houston TX

Assignee:

Zap-Lok Systems International, Inc. - Houston TX

International Classification:

B23P 300
B23P 2500

US Classification:

29458

Abstract:

Mechanical pipe joints of the pin and bell variety, and methods of forming same, wherein the ends are pre-formed so as to permit a controlled interference fit upon joining and preferably provide a double seal against both internal and external pressure, the joints being particularly adapted for field-grade materials, aluminum members, and internally and externally coated members and being readily disengagable and re-formable without producing galling.

US Patent:

45690979, Feb 11, 1986

Filed:

Nov 23, 1983

Appl. No.:

6/554765

Inventors:

Marvin Echols - Houston TX

Assignee:

Superior I.D. Tube Cleaners Incorporated - Houston TX

International Classification:

B08B 904

US Classification:

1510406R

Abstract:

Recirculating tube cleaners pass through inside diameters in a bank of heat exchanger tubes. Variable density tube cleaners are provided which are pressurized to compress and have a substantially neutral buoyancy upon entry from an inlet manifold to the inside diameter of the tubes. Upon exiting from a heat exchanger outlet manifold, the tube cleaners return to either positive or negative buoyancy depending upon the embodiment. Skimmer means intercept tube cleaners having positive buoyancy from the upper portion of flow and direct them to a recirculation system. Open cell elastomer tube cleaners having negative buoyancy may be intercepted at the bottom of the flow and then partially dewatered for adjustment toward neutral buoyancy. As contrasted to prior art embodiments in which the entire outlet flow must be screened, here only a small percentage, for example one percent of the outlet flow, need be intercepted. The tube cleaners are re-entrained in a pumped stream and reintroduced for circulation through the tube bank under pressure.

US Patent:

40646190, Dec 27, 1977

Filed:

Dec 3, 1976

Appl. No.:

5/747409

Inventors:

Marvin C. Echols - Houston TX
David L. Gruller - Houston TX

Assignee:

Zap-Lok Systems International, Inc. - Houston TX

International Classification:

B23P 300
B23P 2500

US Classification:

29458

Abstract:

Mechanical pipe joints of the pin and bell variety, and methods of forming same, wherein the ends are pre-formed so as to permit a controlled interference fit upon joining and preferably provide a double seal against both internal and external pressure, the joints being particularly adapted for field-grade materials, aluminum members, and internally and externally coated members and being readily disengagable and re-formable without producing galling.