Circuit board connection for a pressure sensor used in mining hydraulics

• US 6,112,597 A
• Filed: 09/02/1997
• Issued: 09/05/2000
• Est. Priority Date: 09/06/1996
• Status: Expired due to Term

• Current Assignee: Caterpillar Global Mining Europe GmbH (Caterpillar Incorporated)
• Original Assignee: DBT Automation GmbH
• Inventors: Tschope, Jurgen
• Primary Examiner(s): OEN, WILLIAM L
• Application Number:
  US08/923,764
• Time in Patent Office: 1,099 Days
• Field of Search: 338/4, 338/5, 338/42, 73/712, 73/716, 73/720, 73/721, 73/756
• US Class Current: 73/756
• CPC Class Codes: E21D 15/46 with load-measuring devices; with alarm devices
• CPC Class Codes: G01L 19/143 Two part housings
• CPC Class Codes: G01L 19/148 Details about the circuit board integration, e.g. integrated with the diaphragm surface or encapsulation

Abstract

Pressure sensor (10) for measuring hydraulic pressures, in particular for use in mining hydraulics, having a hydraulic connection (12) and a hydraulo-electrical pressure transducer (15) which is loaded hydraulically via the said connection, and having a circuit board (18) which processes the electrical measured values from the pressure transducer. In order to ensure a secure fastening of the circuit board to the pressure transducer with, at the same time, easy exchangeability of the board, it is proposed by the invention that the circuit board be screwed to the pressure sensor (10) at a distance from the pressure transducer (15), preferably with at least one spacer (23, 24) interposed.

Claims

1. A pressure sensor for measuring hydraulic pressures, in particular for use in mining hydraulics, comprising:

a hydraulic connection;

a hydraulo-electrical pressure transducer which can be loaded hydraulically via the said connection;

a circuit board which processes the electrical measured values from said pressure transducer and is connected electrically to said pressure transducer; and

means for attaching said circuit board to said pressure sensor at a spacing from said pressure transducer, said attaching means including a plurality of spacers in the form of sleeves, through each of which is a retaining screw extending through a drilled hole in said circuit board and interengaging a threaded hole in said pressure sensor.

2. The pressure sensor of claim 1, said pressure sensor comprising two parts, with a plug part having the hydraulic connection and the pressure transducer, and with a housing which is screw-connected to said plug part, the circuit board being arranged on said plug part.

3. A pressure sensor according to claim 1, wherein said attaching means includes two plastic sleeves and two drilled holes in said circuit board located diametrically opposite each other.