Pressure sleeve

• US 5,440,933 A
• Filed: 03/30/1994
• Issued: 08/15/1995
• Est. Priority Date: 04/10/1993
• Status: Expired due to Fees

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Krebs, Holger, Dums, Karl, Brammer, Hartmut, Fries, Romuald
• Primary Examiner(s): Chilcot, Jr., Richard E.
• Assistant Examiner(s): Noori, Max H.
• Application Number:
  US08/221,062
• Time in Patent Office: 503 Days
• Field of Search: 73/115, 73/756, 73/753, 73/702, 73/661
• US Class Current: 73/756
• CPC Class Codes: G01D 11/30 Supports specially adapted for an instrument; Supports specially adapted for a set of instruments
• CPC Class Codes: G01L 23/222 using piezoelectric devices

Abstract

In a pressure sleeve in particular a vibration pickup, an abutment surface is formed as a circumferential ring at a location radially spaced from a central point. Therefore, the pressure sleeve can be fully pressed against the structure to be monitored by a mounting screw. Therefore a sensor provided with the pressure sleeve can approximately linearily extending and disturbance measuring signals.

Claims

1. A pressure sleeve in particular for a vibration pickup, comprising a body having an abutment surface for abutting against a structure and an opening for passing mounting element for mounting said body on the structure, said abutment surface being provided with at least one circumferential raised portion which is radially spaced from a central point of said abutment surface and formed so that between a mouth of said opening and an inner periphery of said raised portion an angle of substantially 0.5°

to 1.5°

is formed so as to improve a mechanical coupling of said body on the structure.

2. A pressure sleeve as defined in claim 1, wherein said raised portion is formed as a web.

3. A pressure sleeve as defined in claim 1, wherein said raised portion is conical and inclined toward said opening of said body.

7. A pressure sleeve as defined in claim 1, wherein said body has a flange with a lower side, said abutment surface being formed as said lower side of said flange.

4. A pressure sleeve in particular for a vibration pick, comprising a body having an abutment surface for abutting against a structure and an opening for guiding a mounting element for mounting body on the structure, said abutment surface being conical and inclined toward said opening of said body so that during mounting of said body on the structure a deformation of said abutment surface occurs which leads from an outer diameter of said abutment surface to a substantially complete abutment of said abutment surface on the structure.

5. A pressure sleeve as defined in claim 4, wherein said conical abutment surface has an angle of substantially between 0.5°

and 1.5°

.

6. A pressure sleeve as defined in claim 5, wherein said angle of said conical abutment surface is equal to substantially 1°

±

0.2°

.