William E Anderson
Engineers in Houston, TX

6457557, Oct 1, 2002

Jun 27, 2000

09/604477

Leslie Anderson - Houston TX 77040
William Anderson - Houston TX 77040

E06C 120

182129, 294 191

A ladder removal tool designed for use with any ladder that is supported at an elevated position and the method of its use are disclosed. The ladder may be an extension ladder or a large “A” frame ladder. The ladder removal consists of a lifting rod that has hook connected to one end by a pivot joint that allows the hook to rotate with respect to the lifting rod. The lifting rod has a substantially right angle bend adjacent the pivot joint to aid the user in reaching up and “hooking” or engaging the hook with a rung of the ladder to be lowered. The opposite end of the lifting rod has a handle attached thereto. Additionally, the leg of the hook attached to the lifting rod has a stabilizer arm attached thereto. The user reaches up and inserts the hook of the tool around a rung of the ladder while simultaneously allowing the stabilizer arm to extend over and engage the side rail of the ladder. Generally, the user lifts one end of the ladder clear of the rack, swings the ladder away from the truck and lowers the ladder to the ground, while the opposite end rotates around the safety bar on the rack.

5322410, Jun 21, 1994

Jan 22, 1992

7/826911

Milo A. Persinger - Kerrville TX
Robert A. Baten - Houston TX
William L. Anderson - Houston TX
Richard I. Cushman - Livonia MI

Stewart & Stevenson Services, Inc. - Houston TX

B66F 1100

4147453

A heat exchanger tube bundle extractor having an improved sled and motive means operable to move the tube bundle into or out of its shell. A fixed screw shaft is provided on the chassis, and a rotatable drive nut on the sled. The drive nut is threadedly retained on the screw shaft. The drive nut is held against axial movement with respect to the sled by a gear box disposed on the sled. The gear box output includes a rotating shaft to which the drive nut is connected, which provides the drive nut with the appropriate speed and power to effectively pull the tube bundle from, or push it back into, the shell. A balance nut disposed on the opposite end of the drive shaft from the drive nut, and threadedly engaged with the screw shaft, reacts against side forces on the sled and screw shaft to assist in keeping the drive nut and screw shaft properly aligned. All of the power generation, conversion, and control equipment for operating the sled drive, a hydraulic breakout cylinder, and a hydraulic elevator is located on the sled itself in a compact and self-contained arrangement, and is movable along with the sled. This eliminates the piping, cabling, and related power equipment from the chassis.

5665594, Sep 9, 1997

Apr 21, 1995

8/416908

Ray P. Schwarz - Friendswood TX
Frederick A. Archibald - Houston TX
William J. Anderson - Houston TX

Synthecon, Inc. - Houston TX

C12M 104, C12M 110, C12M 302

435394

A rotating cell vessel (4), designed to be simply constructed, and method of use have been developed. The vessel (4) is constructed of materials which are permeable to oxygen and carbon dioxide, and when rotated horizontally around central axis (10) suspends the contents, cells and particle substrates, in a liquid medium with a low turbulence, low shear fluid environment. The vessel walls (24) are made at least partially of gas permeable material. The vessel (4) is rotated to suspend the cells and substrate particles in a low turbulence liquid nutrient medium. Oxygen continuously diffuses through the permeable vessel material and through the cell culture liquid medium to provide the needed oxygen to the cells. Carbon dioxide diffuses through the cell culture medium and through the vessel wall (24), removing this waste product from the cell culture. A means for entrapping gas bubbles away from cell growth is also provided.

5188174, Feb 23, 1993

Apr 3, 1991

7/679733

William L. Anderson - Houston TX

Stewart & Stevenson Services, Inc. - Houston TX

E21B 1900

166 77

The tubing injection apparatus of the present invention includes a frame upon which is mounted a pair of opposed endless flexible conveyor members. The conveyor members have opposed elongated parallel runs spaced apart to form a path for engagement with the tubing by gripper blocks disposed on the conveyor members. The conveyor members are trained over spaced apart drive sprockets and idler wheels. Rollers are reciprocally disposed on the frame adjacent that side of the opposed elongated parallel runs opposite the path and adapted for engagement with the gripper blocks. The conveyor members include two strands of chain having projecting pins. The gripper blocks are mounted on the projecting pins such that the surface of the projecting pins is coincident with that surface of the gripper blocks which engages the rollers. Hydraulic piston and cylinder assemblies inserted on the frame have rams adapted to engage the rollers so that the rollers may engage the gripper blocks upon actuation of the hydraulic piston and cylinder assemblies. The piston and cylinder assemblies are connected to a common fluid pressure source.

4821772, Apr 18, 1989

Apr 2, 1985

6/719072

William L. Anderson - Houston TX
Larry A. Sample - Houston TX

Anderson Greenwood & Co. - Bellaire TX

F16K 1102

13762546

A dual active selector valve is set forth. In the preferred and illustrated embodiment, a flange supporting a manifold body is attached to a pressure vessel. The passage through the flange has a selected diameter and the manifold body opens out to a larger diameter, sufficient to enable two valves to be connected side by side, having inlet passages equal in diameter to about one half the selected diameter. A rotatable conduit member is mounted within the manifold body having a centrally located pin for rotation, the rotatable portion incorporating separate flow passages selectively connecting to one of the two alternately deployed valves, and also supporting a valve closure plate to plug the passageway into the valve not being used.