Rotary shafts – gudgeons – housings – and flexible couplings for ro – Coupling accommodates drive between members having... – Coupling transmits torque via radially directed pin
Reexamination Certificate
1998-12-29
2001-05-29
Browne, Lynne H. (Department: 3629)
Rotary shafts, gudgeons, housings, and flexible couplings for ro
Coupling accommodates drive between members having...
Coupling transmits torque via radially directed pin
C403S093000, C464S901000
Reexamination Certificate
active
06238295
ABSTRACT:
The invention relates to a specific improvement designed to prevent accidents—in compliance with current legislation—with a view to avoiding the presence of projections, which could constitute a hazard by catching accidentally, in rotating members of a mechanical transmission, particularly in a fork of a universal joint for a mechanical transmission. These transmissions comprise a splined shaft with an annular recess for axial locking in the splined seat of the fork by means of a push-button immobilizing element, designed to engage tangentially in the said annular recess, the immobilizing element being accommodated in a housing formed in the base of the fork; the said push-button immobilizing element is stressed elastically in the immobilizing position, in which it projects, and can be pressed down manually in order to unlock it. The document NL-7 005 057 is representative of said state of the art.
In order to avoid the risk of the immobilizing element catching when it projects in the immobilizing position, around the said housing, the base of the fork has an enlarged portion forming a cavity: according to the invention the said immobilizing element projects within the said cavity when it is in the immobilizing position, while still remaining enclosed within the said cavity; the cavity is large enough to allow the said element to be pressed down in order to unlock it.
In an advantageous embodiment, the immobilizing element is stressed to make it project out of the said housing by a spring inside the housing, which is in the form of a blind hole. The immobilizing element can be held in its housing by means of at least one stop piece formed in the said housing, while the spring reacts against a plate held in the mouth of the housing, for example by plastic deformations made in the material along the front edge of the said housing.
The said cavity in the enlarged portion can be essentially dihedral in shape with two surfaces which are approximately at right angles to each other and with two sides which follow the external profile of the said enlarged portion which is approximately in the shape of an arc of a circle; the components are designed such that the push-button part of the said immobilizing element is always contained inside the profile of the said sides.
REFERENCES:
patent: 2448278 (1948-08-01), Ronning
patent: 2696089 (1954-12-01), Heth
patent: 4091640 (1978-05-01), Olkowski, Jr. et al.
patent: 4501573 (1985-02-01), Bondioli
patent: 4687367 (1987-08-01), Bondioli
patent: 5169358 (1992-12-01), Bondioli
Browne Lynne H.
McGlew and Tuttle , P.C.
Thompson Kenn
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