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US 5,079,808 AGranted
Spring biased paper clip
OwnerDwight C. Browninventor
Life of this patent
Estimating the term…
Abstract
A paper clip comprising a pair of plate elements having clamping edges, hingedly connected together. A cantilever spring extends from an inner surface of one plate element and engages with the inner surface of the opposite plate element. The cantilever spring can provide increasing clamping force with increasing document thickness.
Claims17
A paper clip, comprising:
- a first plate element having a paper clamping edge;
- a second plate element hingedly connected to said first plate element, said second plate element having a paper clamping edge;
- a hinge connection positioned between and hingedly connecting said plate elements;
- and
- a curved tapered cantilever spring extending for one plate element and located between said plate elements, said cantilever spring having a base portion connected to one plate element and being thicker than a free end portion thereof, said free end portion of said cantilever spring including an outer curved surface portion slidably engaging with the other plate element for biasing portions of said plate elements apart while biasing other portions of said plate elements including said paper clamping edges together about said hinge connection.
2 more elements
A paper clip, comprising:
- a first plate element including a paper clamping section;
- a second plate element hingedly connected to said first plate element, said second plate element having a paper clamping section;
- a hinge connection defined by a set of lugs of said first plate element connecting with a set of lugs having pins of said second plate element, said lugs maintain said plate elements at a preselected distance apart at said hinge connection;
- a curved tapered cantilever spring including a base portion connected to one plate element and positioned adjacent said hinge connection, said cantilever spring shaped to curve away from said hinge connection and including a curved free end portion slidably contacting with the other plate element to bias said paper clamping sections together about said hinge connection, said base portion of said curved cantilever spring being thicker than said free end portion thereof.
1 more element
Dependencies are inferred from the claim text.