Quick-adjusting jackstand apparatus

Details Quick-adjusting jackstand apparatus Quick-adjusting jackstand apparatus

1980-12-08

1982-02-23

Watson, Robert C.

Implements or apparatus for applying pushing or pulling force

Multiple lifters

B60S 902

Patent

active

043166016

ABSTRACT:
A quick-adjusting jackstand apparatus is particularly useful on any harvesting attachments. An improved jackstand has a coarse adjustment and a fine adjustment. Coarse adjustment is accomplished by moving the jackstand from a first stored position to a second extended position. A secondary fine adjustment is accomplished by rotating an inner member which is housed in and threadedly engaged with an outer member. Such rotation results in extension of the inner member from the outer member. The threaded engagement of the members is protected from excessive clogging because such threaded engagement is within the outer member.

REFERENCES:
patent: 587274 (1897-07-01), Rve
patent: 597849 (1898-01-01), Heer
patent: 2634941 (1953-04-01), Eckert
patent: 3189322 (1965-06-01), Hadek
patent: 3595527 (1971-07-01), Douglass
patent: 4176824 (1979-12-01), Linton et al.
patent: 4205825 (1980-06-01), Stanford
patent: 4238113 (1980-12-01), Adams
patent: 4265429 (1981-06-01), Formhals

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