Shock absorber arrangement for mounting delicate equipment and shock absorber for use in the arrangement

• US 4,362,287 A
• Filed: 02/11/1980
• Issued: 12/07/1982
• Est. Priority Date: 02/16/1979
• Status: Expired due to Term

• Current Assignee: A/S Kongsberg Vapenfabrikk
• Original Assignee: A/S Kongsberg Vapenfabrikk
• Inventors: Grongstad, Oddvar
• Primary Examiner(s): Schultz, William H.
• Application Number:
  US06/120,351
• Time in Patent Office: 1,030 Days
• Field of Search: 248/563, 248/565, 267/8 R, 267/140.1, 188/282, 188/312
• US Class Current: 248/563
• CPC Class Codes: B63B 29/12 Self-levelling mountings
• CPC Class Codes: F16F 1/128 with motion-limiting means, e.g. with a full-length guide element or ball joint connections; with protective outer cover F16F1/121 takes precedence
• CPC Class Codes: F16F 15/023 using fluid means

Abstract

Delicate equipment is mounted on a carrier such as a vessel or a vehicle by means of shock absorbers which are spring biased to an accurately defined position in which the equipment is rigidly fastened to the carrier. When the carrier is subjected to a shock force exceeding the biasing of the shock absorbers, the rigid connection is released and the equipment thus protected against damaging forces.

Each shock absorber has a single compression spring which is compressed by an axial force on the shock absorber regardless of the direction of the force.

At least three parallel, vertical shock absorbers carry the equipment. Horizontal shocks are absorbed due to the tilting movement of the equipment relative to the shock absorbers, which are thus subjected to vertical movements in opposite directions.

Claims

1. Shock absorber arrangement for mounting delicate equipment on a carrier such as a vessel or vehicle in such a manner that the equipment is normally rigidly connected to the carrier in a predetermined position relative thereto, but is permitted to yield as a result of shocks involving an acceleration beyond a certain limit, whereupon it is forced back into said predetermined position, characterized in that the arrangement comprises three separate, self-contained, identical shock absorbers which all act in both directions along a vertical axis and carry the equipment at a level different from that of the centre of gravity of the equipment, whereby horizontal shocks result in a tilting movement and thus a vertical load in opposite directions on the shock absorbers, comprising a piston-like element having an outer conical surface which by means of a biased spring is forced into self-centering engagement with a corresponding inner conical surface on a second element, characterized in that the opposite end of the spring engages an abutment element having an engagement surface which by the spring is forced towards a corresponding engagement surface on said second element, which forms a sleeve-like housing in which the spring is arranged, and is adapted to be adjustably mounted on the carrier, and that a shaft-like element which extends axially through the housing and displaceably through the piston element and the abutment element, respectively, at both ends of the housing and which is adapted to be connected to the equipment to be mounted, engages axially outwardly directed engagement surface on the piston element and the abutment element, whereby the relative axial movement between the shaft and the housing can take place in both directions by movement of either the abutment element or the piston element inwardly in the housing with concomitant compression of the spring between these elements.

2. Shock absorber according to claim 1, characterized in that the surface on the abutment element engaging the housing is spherical and the outer diameter of the piston element is smaller than the inner diameter of the housing to allow the shaft to be inclined relative to the axis of the housing.

3. Shock absorber according to claim 1 or 2, characterized that the shaft is connected to the equipment through a head which can adjust itself to a slightly inclined position in any direction relative to the axis of the shaft.

4. Shock absorber according to any of the claim 1 or 2 characterized in that an oscillation dampener is associated with the shaft to dampen the movement between said shaft and the abutment member.