John C Bond
Engineers at 61 Ave, Arvada, CO

5658127, Aug 19, 1997

Jan 26, 1996

8/592824

John C. Bond - Arvada CO
Harold R. Perriman - West Minister CO
Stephen P. Murphy - West Minister CO

Sundstrand Corporation - Rockford IL

F01D 1100

415112

A mechanical face seal is provided that incorporates fluid passages through either or both of a first and a second element of the seal for directing a flow of cooling fluid to an exposed area of the second element which extends radially outward beyond the contact area of the seal. The fluid passages are configured and oriented to provide more cooling flow through each seal element and over the surfaces of each seal element then is achievable with prior cooling and lubrication approaches, to thereby enhance heat dissipation from the elements of the seal to such a degree that lubrication, seal life and performance of the seal are improved. In preferred embodiments of the invention, the seal elements are specially configured to create an annular gap between the elements for centrifugally pumping fluid away from a contact area of the seal. One or more passages through either or both of the first and second elements provide a flow of fresh, relatively cool fluid into the annular gap at a position immediately adjacent but outside of the contact area. The flow of fresh fluid continuously replenishes the fluid pumped away from the contact area by the annular gap.

5253986, Oct 19, 1993

May 12, 1992

7/882454

John C. Bond - Arvada CO
Homer E. Gravelle - Arvada CO
William J. Mabe - Thornton CO

Milton Roy Company - Arvada CO

F04B 1700

417420

An impeller-type pump system includes a housing defining a pump chamber and a fluid inlet communicating with the chamber. An impeller is rotatably mounted in the pump chamber downstream of the inlet. The impeller includes a rear magnet hub mounting an axially facing driven magnetic coupling. Bearings are provided about the outside of the impeller for rotatably mounting the impeller in the pump chamber. Ceramic barrier discs are located behind the impeller to define a closure sealing the rear of the pump chamber. Ball bearings are mounted in a cup-shaped recess in the rear face of the magnet hub and bearing against the ceramic barrier discs at least during start-up of the pump. The sidewalls of the recess diverge away from the ceramic barrier discs, whereby the ball bearings move away from the ceramic barrier discs under centrifugal force in response to rotation of the impeller.

5755817, May 26, 1998

Dec 23, 1996

8/771878

Warren Conrad Prouty - Arvada CO
John Clark Bond - Arvada CO

Sundstrand Corporation - Rockford IL

F04D 2912

415112

A hydrostatic seal is provided having control of sealing surface taper and cavitation reduction structure between the sealing surfaces. Control of sealing surfaces taper is provided through one or more relief recesses in the seal wall to which flexing forces are applied by fluid pressure and temperature to reduce the effects of seal rigidity on the parallel relationship between the sealing surfaces. The cavitation reduction structure includes inclination of the channels leading to the sealing surface recesses in the direction of relative movement of the fluid between the sealing surfaces. Enlarged vortex chambers are disposed at the outlet of those channels within the recesses to isolate fluid vapor bubbles from the recess walls.