1
John W Lewis: Dental syringe with quick disconnect tip. A DEC, Klarquist Sparkman Campbell Leigh Hall & Whinston, February 3, 1981: US04248589 (142 worldwide citation)

The specification discloses a dental syringe having a head, a tip and a releasable coupling mounted on the head. The head and tip have a corresponding number of fluid passages therethrough. The coupling includes a cylindrical base and a lock nut which screws over the base. The base and the lock nut ...


2
Eugene B Davis: Warm water dental syringe. A Dec, Klarquist Sparkman Campbell Leigh Hall & Whinston, February 10, 1981: US04249899 (122 worldwide citation)

The specification discloses a dental syringe with a tubular handle adapted to pre-heat water before it is delivered through the syringe tip into a patient's mouth. Water and air supply hoses are connected to the handle, and electric heater and thermostat elements are mounted within the handle for ma ...


3
George K Austin Jr, Larry D Lietz: Fail-secure lock system. A DEC, Klarquist Sparkman Campbell Leigh & Whinston, September 8, 1987: US04691948 (95 worldwide citation)

A fail-secure lock apparatus includes a normally pneumatically actuated locking bolt that can be manually operated to withdraw the same in the event of a power failure. The apparatus incorporates a standard key operated lockset connected to operate the pneumatic power drive means or, in the event of ...


4
George K Austin Jr, El Don L Hoven, Tony J Tewell, Shawn R Irwin, Paul B Krebs, Bradley A Rice: Dental chair. A Dec, Klarquist Sparkman Campbell Leigh & Whinston, March 2, 1993: US05190349 (50 worldwide citation)

The chair includes a movable seat and back that are configured to enhance the patient's comfort by providing lumbar support when the chair is in the recumbent position and by minimizing patient sliding within a moving chair. Chair movement is controlled by a microprocessor-based control system that ...


5
John V Black, Paul D Sturges: Dental apparatus. A Dec, Klarquist Sparkman Campbell Leigh & Whinston, November 27, 1990: US04973246 (48 worldwide citation)

A dental apparatus is provided which includes a handle having a hollow interior and an end portion which is slightly curved to facilitate insertion in the oral cavity of a dental patient. Within the hollow interior, an air heater system is provided consisting of an air vortex tube. Air is delivered ...


6
Paul B Krebs, Shawn R Irwin: Switch controller. A Dec, Klarquist Sparkman Campbell Leigh & Whinston, August 23, 1994: US05340953 (44 worldwide citation)

A switch controller having a housing cover with a central ridge and opposed top surfaces which incline downwardly away from the central ridge. The top surfaces also incline on progressing from one end of the housing to the opposite end. A pair of footpads are mounted on the upper surface of the hous ...


7
George K Austin Jr, William F Fisher: Integrated dental chair and post-mounted delivery system. A Dec, Klarquist Sparkman Campbell Leigh & Whinston, February 11, 1997: US05601331 (44 worldwide citation)

Clearance in the seat base to which a post is pivotally mounted provides for wide-angle rotation of post-mounted equipment that is supported by the post that is mounted to the base. The location of the pivot axis is such that the mechanisms employed for pivotally mounting the equipment to a dental c ...


8
George K Austin Jr, Andrew G Schaefers: Compact in-line thermostatically controlled electric water heater for use with dental instruments. A Dec, Klarquist Sparkman Campbell Leigh & Whinston, October 26, 1993: US05257341 (38 worldwide citation)

A compact, in-line electric water heater is provided for heating water to a temperature suitable for dental operations. The heater includes a cylindrical inner tube containing an electrical heater element and a cylindrical outer tube concentrically spaced therefrom, through which water to be heated ...


9
J Rick Halbirt: Linkage assembly for mechanical arm. A Dec, Klarquist Sparkman Campbell Leigh & Whinston, August 23, 1994: US05340072 (38 worldwide citation)

The linkage assembly provides an adjustment mechanism for adjusting the effective length of a rod member pivotally attached between two posts. The adjustment mechanism reduces the need for small-tolerance pivot hole locations in the assembly and permits compensation for arm sag that is attributable ...


10
Paul B Krebs, Bradley A Rice, El Don L Hoven: Position control for a dental chair. A Dec, Klarquist Sparkman Campbell Leigh & Whinston, December 7, 1993: US05267778 (33 worldwide citation)

The chair includes a movable seat and back that are configured to enhance the patient's comfort by providing lumbar support when the chair is in the recumbent position and by minimizing patient sliding within a moving chair. Chair movement is controlled by a microprocessor-based control system that ...