Strut spring compression

Details Strut spring compression Strut spring compression

1999-02-22

2000-10-10

Watson, Robert C.

Implements or apparatus for applying pushing or pulling force

Metallic spring stretcher and/or compressor

B23P 1904

Patent

active

061293393

ABSTRACT:
A strut spring compressor (20) having a support frame (22), a plurality of pivot arms (24, 26, 28, 30), a plurality of spring clamps (32, 34, 36, 38), and an actuating mechanism (40) is utilized to compress and expand a spring (42) of a strut assembly (44) whereby maintenance can be performed on the strut assembly (44). Each of the pivot arms (24-30) is pivotally attached to the support frame (22) by ball joints (74) which permit the arms (24-30) to pivot independently and three-dimensionally to compensate for a variety of spring sizes, and the spring clamps (32-38) are pivotally attached to the arms (24-30) to compensate for a variety of spring pitches. The actuating mechanism (40) includes a forcing screw (116) pivotally joined to a top trunnion assembly (118) and threadably engaging a middle trunnion assembly (120) and a bottom trunnion assembly (122). The forcing screw (116) includes a middle threaded portion (136) threadably engaging the middle trunnion assembly (120) and a lower threaded portion (138) threadably engaging the bottom trunnion assembly (122). The lower thread pitch is twice the middle thread pitch, so that the arms maintain substantially the same magnitude of angle with respect to the support frame (22).

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