Browse Prior Art Database

Hydraulic Positioning Apparatus

IP.com Disclosure Number: IPCOM000096258D
Original Publication Date: 1963-Mar-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 67K

Publishing Venue

IBM

Related People

Titcomb, SC: AUTHOR

Abstract

This hydraulic load positioning apparatus utilizes a constant flow rate system and temperature compensation for precise positioning. The drive is a constant speed gear pump 1, the output of which is selective directed to gear pump motor 2. This is by way of electromagnetically controlled on-off valve 3 and forward-reverse valve assembly 4. Restricted acceleration orifice 5, connected to the pump outlet, and restricted deceleration orifice 6, connected to the motor outlet, provide smooth acceleration and deceleration for motor 2 by damping fluctuations in flow rate.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 57% of the total text.

Page 1 of 2

Hydraulic Positioning Apparatus

This hydraulic load positioning apparatus utilizes a constant flow rate system and temperature compensation for precise positioning. The drive is a constant speed gear pump 1, the output of which is selective directed to gear pump motor
2. This is by way of electromagnetically controlled on-off valve 3 and forward- reverse valve assembly 4. Restricted acceleration orifice 5, connected to the pump outlet, and restricted deceleration orifice 6, connected to the motor outlet, provide smooth acceleration and deceleration for motor 2 by damping fluctuations in flow rate.

In the on position of valve 3 as shown in the drawing, the fluid pressure at the pump outlet increases, actuating lever arm 9 to release detent 7. This permits motor 2 to rotate load driving gear 8. When valve 3 is moved to off position, the pump outlet is vented to reservoir 15. Such is by way of passageways 19 and 20 incident to the movement of the spool valve lands toward the left, permitting spring biased arm 9 to engage detent 7. The inertia of motor 2 and the hydraulic system rotates detent 7 until its shoulder 10 engages arm 9. A similar detent and arm assembly, not shown, is required for stopping the apparatus when it is moved in the reverse direction.

The load can be stopped at the end of any revolution of the detent 7 incident to opening And 21 by a stop signal and a venier pulse produced by photoelectric device 13. This is when the detent reaches a predetermi...