Joints and connections – Articulated members – Axially spring-biased coaxial members
Patent
1989-03-16
1991-04-02
Cuomo, Peter M.
Joints and connections
Articulated members
Axially spring-biased coaxial members
403145, 2482801, 2482811, F16B 710
Patent
active
050043684
ABSTRACT:
A pivot arm for apparatus, particularly medical apparatus has two mounting supports and a connecting cross-member. One mounting support is to be mounted on a stationary support and the other is to be attached to the apparatus to be moved. A first coupling hingedly connects one of the mounting supports to a connecting rod housed within the cross-member, and the other end of the connecting rod is connected to the other mounting support. A helical spring is supported concentrically with respect to the connecting rod within the cross-member. The cross-member is formed as a single hollow, essentially completely closed, primarily tubular spring housing and a second coupling is provided between a spring support that is near the end of the rod and is stationary relative thereto, and the adjacent mounting support, so that both couplings are always arranged parallel to each other in the housing. The ends of the housing are sealed with caps to prevent the escape of undesirable matter, such as dust, dirt, or lubricants.
REFERENCES:
patent: 4082244 (1978-04-01), Groff
patent: 4111576 (1978-09-01), Jordan
patent: 4144831 (1979-03-01), Heydolph
patent: 4160536 (1979-07-01), Krogsrud
patent: 4199179 (1980-04-01), Curry
patent: 4397439 (1983-08-01), Wilbur et al.
patent: 4456233 (1984-06-01), Muller
patent: 4512600 (1985-04-01), King
patent: 4584898 (1986-04-01), Panushka
patent: 4591122 (1986-05-01), Kreuzer
patent: 4657217 (1987-04-01), Kiesel et al.
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