Chairs and seats – Bottom or back – Contoured bottom
Patent
1996-02-29
1998-08-11
Cranmer, Laurie K.
Chairs and seats
Bottom or back
Contoured bottom
29745227, 297DIG1, 5653, A47C 702
Patent
active
057917361
DESCRIPTION:
BRIEF SUMMARY
This invention relates to a seat such as a chair but also includes any other seating apparatus such as sofas, couches, stools and the like.
Many attempts have been made to produce seating which places a person in a position so that the pelvis, sacrum, spinal column and cranium are in correct biomechanical and organic orientation and physiologically efficient posture.
It is well recognised and documented that incorrect seating posture causes incorrect biomechanical and organic orientation of the pelvis, sacrum, spinal column and cranium which in turn creates significant central and peripheral nervous system distortions and interferences, which creates musculo-skeletal dysfunction which translates to health, well-being and efficiency problems.
As is well know and documented, a person's nervous system controls and co-ordinates all organic and biomechanical functions of the body.
The brain being the master control is housed in the cranium which is made up of several bony plates that are functionally movable. From the brain stem forms the spinal cord made up of tracks which carry sensory and motor function information to control and co-ordinate all bodily biomechanical and organic function. The individual vertebral spinal nerves are formed by the union of ventral and dorsal spinal nerve roots which are extensions of the spinal cord. The spinal nerves extend in pairs outwardly from the spinal cord between the vertebrae of the spinal column, sacrum and pelvis to the various organs and tissues of the body.
It has long been recognised that incorrect seating posture can cause incorrect biomechanical and organic orientation of the pelvis, sacrum, spinal column and cranium, which applies pressure and tension on the brain tissue, spinal cord and spinal nerve roots which in turn result in altered and improper neural control of the various organs and tissues of the body. This in turn can result in damage and/or disease to those organs and tissues.
Many attempts have been made to produce seating which maintains the spine straight and these include seats which places a person in a generally kneeling position as well as other seating apparatus which is intended to provide lumbar support and also maintain the spine in its correct configuration.
These seats may provide some improvement to the seating attitude and may maintain the spine in a more preferred configuration.
However, this seating configuration still forces and/or requires a person to sit firmly on the sacrum, coccyx and ischial tuberosities as a triangular configuration thereby constraining the sacroiliac ligaments. Due to this, gravitational forces pulling down all aspects of the pelvic bowl and general inadequate design of seating biomechanics, the sacrum is locked in a fixed position and prevents and inhibits normal vibratory rhythmic movement of the sacrum.
Correct biomechanical and organic orientation of the pelvis, sacrum, spinal column and cranium is not only important to enable the nervous system to operate optimally, efficiently and correctly but also to provide proper primary respiration.
Primary respiration is defined for the purposes of this specification to be the proper hydrostatic pressure and circulation of the cerebrospinal fluid (CSF) and tone of neural tissue.
Inside the brain are holes called ventricals. Lining these ventricals are specialised cells called the choroid plexus. These cells produce approximately 750 mls of CSF per day. This fluid exits the brain at specific holes into the external areas around the brain.
Around the brain and spinal cord are three layers of cells called the dura mater, arachnoid mater and pia mater from external to internal respectively.
The CSF exits foramina (holes) in the base of the brain into the space created between the pia mater and arachnoid mater called the arachnoid space.
This space is a closed system and extends around the brain down to and connects with the second sacral tubercle of the internal aspect of the sacrum in the spinal canal.
This closed system has a specific hydrostatic pressure that must
REFERENCES:
patent: 3305878 (1967-02-01), Hellbaum
patent: 3308491 (1967-03-01), Spence
patent: 4668015 (1987-05-01), Kjersen
patent: 4690459 (1987-09-01), Ullman
patent: 4755411 (1988-07-01), Wing et al.
Cranmer Laurie K.
Heygarth South Pty. Ltd.
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