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US 5,357,994 AGranted
Hidden safety contoured leaf spring locking device
OwnerWen C. Chunginventor
Life of this patent
Estimating the term…
Abstract
The invention herein relates to a kind of hidden safety contoured leaf spring positioner device for umbrella structures that is comprised of a center pole, a sliding strut spreader, a handle connector, contoured leaf spring and other components, wherein the tensility of the contoured leaf spring is utilized to produce a special locking function and is installed in a round positioning hole of the positioning cavity inside the sliding strut spreader, thereby enabling an umbrella to be actively and safely locked when opened or closed.
Claims1
A hidden safety contoured leaf spring positioning system for an umbrella structure comprising:
- (a) a longitudinally directed tubular center pole defining an inner wall thereof having a through opening and a longitudinally directed through slot formed in a lower section thereof;
- (b) a strut spreader slidingly engaged to an external surface of said tubular center pole, said strut spreader having a longitudinally directed through opening defining an internal wall of said strut spreader and a positioning slot formed within an upper section of said internal wall of said strut spreader;
- (c) a hollow positioning tube contiguously mounted between said external surface of said tubular center pole and said internal wall of said strut spreader, said hollow positioning tube having a protruding tab extending from an upper section thereof and inserted into said positioning slot, said positioning tube having an upper and a lower positioning hole formed therethrough;
- (d) a handle connector slidably engaged with said external surface of said tubular center pole having an insertion hole formed therethrough;
- (e) a contoured leaf spring mounted internal said tubular center pole, said contoured leaf spring having a lower end in contact with a spring actuator member extending through said insertion hole of said handle connector, said contoured leaf spring having an upper section forming an elongated arched member contacting said internal wall of said tubular center pole, said contoured leaf spring having an upper end inserted within said tubular center pole through opening for supporting said contoured leaf spring, said contoured leaf spring having a central section having a pawl member inserted into a positioning hole formed through said strut spreader, whereby said pawl member is engaged within said upper positioning hole when said umbrella is closed and said pawl member is engaged within said lower positioning hole when said umbrella is opened.
2 more elements
Dependencies are inferred from the claim text.