David Ray Holt

US Patent:

56988095, Dec 16, 1997

Filed:

Mar 6, 1996

Appl. No.:

8/611749

Inventors:

David D. Holt - Dallas TX

International Classification:

F42B 3300
F42B 3310

US Classification:

86 24

Abstract:

A primer removal tool (10) includes a receiving member (12) pivotally coupled to a guide rod assembly (14). An actuating member (16) is pivotally coupled to the receiving member (12) and the guide rod assembly (14). A first spring (18) is coupled between the receiving member (12) and the guide rod assembly (14). A second spring (20) is coupled between the guide rod assembly (14) and the actuating member (16). Pressure applied between the receiving member (12) and the actuating member (16) compresses the first spring (18) to allow the guide rod assembly (14) to enter the receiving member (12). Additional pressure compresses the second spring (20) to force the guide rod assembly (14) to move toward a press plate (24) of the receiving member (12). The guide rod assembly (14) forces a shell casing (30) against the press plate (24) to allow a de-priming pin (22) of the guide rod assembly (14) to separate a spent primer (32) from the shell casing (30) through an aperture (26) of the press plate (24).

US Patent:

20210325360, Oct 21, 2021

Filed:

Apr 17, 2020

Appl. No.:

16/852391

Inventors:

- Annandale NJ, US
David G.L. Holt - Center Valley PA, US

International Classification:

G01N 33/28
G01N 13/02

Abstract:

Provided is a method for determining air release performance of a lubricating oil. The method involves determining air release time of the lubricating oil in accordance with ASTM D3427 at a designated temperature; determining surface tension of the lubricating oil at the temperature used in ASTM D3427; determining kinematic viscosity of the lubricating oil in accordance with ASTM D445 at the temperature used in ASTM 3427; and utilizing the surface tension, ASTM D3427 air release time, and ASTM D445 kinematic viscosity to determine air release performance of the lubricating oil. Surface tension is correlated with ASTM D3427 air release time at an ASTM D445 kinematic viscosity of at least about 30 cSt. The method has higher measurement sensitivity and reproducibility/repeatability than ASTM D3427.

US Patent:

20200199475, Jun 25, 2020

Filed:

Dec 11, 2019

Appl. No.:

16/710483

Inventors:

- Annandale NJ, US
Michael L. Alessi - Rose Valley PA, US
Gary Christensen - Wenonah NJ, US
David G.L. Holt - Center Valley PA, US
Kathleen K. Cooper - South River NJ, US

International Classification:

C10M 107/02

Abstract:

This disclosure provides a method for improving wear control, while maintaining or improving energy efficiency, in a mechanical component having sliding or rolling between contacting surfaces. The method involves using a lubricant composition in the mechanical component having sliding or rolling between contacting surfaces. The lubricant composition has a base stock blend as a major component, and at least one lubricant additive, as a minor component. The base stock blend has at least one first base stock having a viscosity from 1 to 50 cSt at 40 C. and at least one second base stock having viscosity from 100 to 2000 cSt at 40 C. The first base stock is present in an amount greater than 50 to 95 wt % of the base stock blend, and the second base stock is present in an amount from 5 to less than 50 wt % of the base stock blend. The second base stock is miscible with the first base stock.