Robert L Dent

US Patent:

39512380, Apr 20, 1976

Filed:

Dec 16, 1974

Appl. No.:

5/533285

Inventors:

Robert K. Dent - Seattle WA
Douglas K. DuBuque - Lynnwood WA

Assignee:

Tyee Aircarft, Inc. - Everett WA

International Classification:

F16D 6300
F16F 708

US Classification:

188 1B

Abstract:

A piston is mounted for relative sliding movement in the cylindrical bore of a sleeve. The piston comprises a plurality of piston parts, one, a driving piston part connected with a prime mover or a fixed support. A piston rod, supported by the piston at one end and by a sleeve guide at the other end, drives said driving piston part. The other and driven piston parts are connected with, and driven by said one piston part through a metallic ball, rollable in a groove formed in abutting piston part surfaces. This groove extends generally parallel to the piston axis, at an angle thereto, and with the opposite end groove portions thereof closest to the piston axis. When the piston parts move in given and opposite directions, the depth of the groove reduces and the ball functions to transmit motion from the driving piston part to the driven piston part. When the piston parts move in the other direction, the depth of the groove increases and no motion is transmitted. The driven piston parts are relatively initially resiliently urged against the cylindrical bore so they tend to hold such position and movement of the driving piston in one direction causes relative motion between the piston parts and the ball-receiving groove causing the ball to wedge and interconnect the driving and driven piston parts.

US Patent:

41142500, Sep 19, 1978

Filed:

Aug 16, 1976

Appl. No.:

5/714600

Inventors:

Robert K. Dent - Seattle WA

International Classification:

B21D 3900
B23P 1100

US Classification:

29517

Abstract:

There is disclosed an externally threaded shank, such as that of a bearing or clevis or eyebolt, or an externally threded nipple, such as that of a tubular insert, which is to be fixedly and nonrotatably secured to and disposed within the internally threaded bore of a tube. In connection with shanks, longitudinal slots are provided therein. In connection with nipples, an end flange or shoulder with notches therein is provided. In connection with tube and portions, to receive either a shank or nipple, nitches are provided in an end wall thereof. Then a sleeve, preferably of like but softer material than the tube and of larger diameter than the tube, is disposed on the shank or on the nipple and adjacent the notches or slots in the tube end portion. The sleeve selectively employs either a smooth bore, an internally threaded bore, lugs on either end wall thereof, or an internal spline, or combinations of less than all thereof. Then the sleeve is cold pressed providing metallic flow and migration of metal into the threads of the shank adjacent the tube end wall and into the longitudinal slot in the shank, if a shank is employed; or into the threads adjacent the tube end wall, into the nipple notches, and into the notches in the tube end wall, if a nipple is employed.

US Patent:

41836944, Jan 15, 1980

Filed:

May 22, 1978

Appl. No.:

5/908404

Inventors:

Robert K. Dent - Seattle WA

International Classification:

F16B 2900

US Classification:

403320

Abstract:

There is disclosed an externally threaded shank, such as that of a bearing or clevis or eyebolt, or an externally threaded nipple, such as that of a tubular insert, fixedly and nonrotatably secured to and disposed within the internally threaded bore of a tube. In connection with shanks, longitudinal slots are provided therein. In connection with nipples, an end flange or shoulder with notches therein is provided. In connection with tube end portions, to receive either a shank or nipple, notches are provided in an end wall thereof. Then a sleeve, preferably of like but softer material than the tube and of larger diameter than the tube, is disposed on the shank or on the nipple and adjacent the notches or slots in the tube end portion. The sleeve selectively employs either a smooth bore, an internally threaded bore, lugs on either end wall thereof, or an internal spline, or combinations of less than all thereof. Then the sleeve is cold pressed providing metallic flow and migration of metal into the threads of the shank adjacent the tube end wall and into the longitudinal slot in the shank, if a shank is employed; or into the threads adjacent the tube end wall, into the nipple notches, and into the notches in the tube end wall, if a nipple is employed.

US Patent:

39905420, Nov 9, 1976

Filed:

Jan 22, 1976

Appl. No.:

5/651609

Inventors:

Robert K. Dent - Seattle WA
Douglas K. DuBuque - Lynnwood WA

Assignee:

Tyee Aircraft, Inc. - Everett WA

International Classification:

B65H 5910

US Classification:

188 67

Abstract:

The linear motion arresting device has a stationary member with an internal bore. A mating piston, formed of a plurality of piston parts, is slidable in said bore. One piston part is connected to a prime mover and the others are slidable toward and away from, and lengthwise of, said one piston part. Each of the piston parts has an elongated groove extending parallel to the bore and with the grooves providing directly between piston parts, a ball receiving channel in which a ball may travel and with the channel extending axially of, and at an angle to, the bore and with portions of the two opposite ends of the grooves extending more radially inwardly of the bore than the other two. A relatively nondeformable ball is mounted for travel in the ball receiving channel. A spring construction moves the piston parts in opposite, axial directions until the more radially inward portions of said grooves contact said ball. The driving piston part is connected with a prime mover and the driven piston parts are connected therewith through said ball.