21st-Century Scientific Inc. H-Frame power wheel chairs,bounder plus and big bounder,big bounder

Nearly any size H-Frame Power Chair you need!
What seat width H-frame powerchair are you looking for?
Seat width |
Click on your choice for more information |
Seat depth |
15" to 26" |
Seat height |
21" is standard; 18" to 20" |
Back height |
16" standard for non-reclining backs |

Ronald E. Prior, Ph.D. models BIG BOUNDER H-frame
with 13" seat elevator at Mt. Rushmore
H-Frame Power Seating Power Legrest Systems
Power seating systems available: recline, tilt, seat elevate, and power headrest
Dual independent power elevating legrests (DIPLR)
Toggle switch or optional through-the-joystick proportional control
BOUNDER Plus and BIG BOUNDERH-Frame Power Chairs are truly high performance!
Fast! Configured for 9.1, 10.0 or 10.8 MPH top speed for most users. Slower speeds can be easily configured and programmed.
Extended Range! Large, sliding dual group 27 battery box provides additional range (over 40 miles per charge under ideal conditions; over 25 miles per charge in typical use). Group 27 batteries are the largest in use on power wheelchairs and are readily available.
Check out these standard features!
Durable H-style frame uses 2.5" x 1.5" x 0.125" wall steel - TIG welded for superior strength
0.120" wall steel seat rails and back posts - for extra strong seat and back
Super Torque 3 motors and brakes standard
Quiet non-slip Panther synchronous drive belt system - won't slip in rain and snow; similar to those used on many motorcycles
Sliding dual group 27 battery box - for extended range
Super Duty 12 position adjustable suspension forks - with oversized 5/8" diameter bearings and fork stems
Sheet metal pan seat
Super Duty sling back upholstery - double liner, cap, and web strap under every screw; attached with machine screws
Detachable desk length arms
Reinforced arm mounts
Anti-tipping wheels
Quick adjust clutches - combination belt tensioner and belt release mechanism
UE1D electronics - 6 programs, power and select switches, battery condition meter, diagnostics, and more
Electric brake control - drive chair / set brakes (for pin point stops on hills and lifts)
Smart electric brake release - operate chair/release brakes (for easy pushing by an attendant)
9" x 3.50" steel caster wheels - excellent on most surfaces including grass and dirt roads
12.75" x 4.00" steel drive wheels - available with smooth or knobby treads
Built in taillights included - turn on and off with chair power (turn on and off with light switch if headlight ordered)
Very stable rear wheel drive - does not fishtail at high speeds
Durable black powder coated frame
Fully automatic 8A dual mode battery charger - charges both gel-cell and standard lead acid batteries
Detailed Owner's Manual
Easy to service and maintain
And these popular H-Frame Power Chair options!
UE1E electronics - similar to UE1D but also includes through-the-joystick power seating and ECU control
UE1D or UE1E programmer - for use by dealer or user to customize electronic settings
Power 700 / Power 1000 options - to increase max user weight to 700 / 1000 lbs, respectively (BIG BOUNDER only)
Colored (non-black) frame - red baron, blue streak, evergreen, yellow, light gray, sky white, teal, lavender, hot pink, custom
Many different hand control and hand control mounting options, including chin and attendant controls
Specialty controls - sip puff, switch controls, head arrays, etc.; DX and/or ASL
Headlamp and switch - to light up the road
Automatic 12A dual mode battery charger
Many accessories - horn, rear view mirror, fan, electric leg bag emptier
Plus many more options too numerous to list!
BOUNDER Plus H-FRAME POWER WHEELCHAIRS
STANDARD FEATURES
For users up to 500 lbs (or who are tough on equipment or want more speed)
16" to 20" seat widths in 1" increments (12" to 15" available at extra cost)
Durable H-style TIG welded frame using 2.5"x1.5"x0.125" wall steel
Fast! Top speeds up to 11.6 MPH (18.7 kph)
Super Torque 3 Motors Brakes (ST3MB)
Quiet non-slip Panther synchronous gear belt drive
Sliding dual group 27 battery box with safety reflectors
UE1D premium electronics (6 programs with bi-directional select switch)
Built in taillights Electric brake control (Drive Chair / Set Brakes)
Battery condition meter Smart brake release switch (for easy attendant pushing)
Heavy duty 12 position adjustable suspension forks
Super Duty caster barrels and suspension forks (5/8" fork stems bearings ID's)
9"x3.50" metal caster wheels 12.75" x 4.00" steel rear wheels
0.120" wall seat rails and back posts
Black powder coated frame
Super Duty sling upholstery (double liner, cap and web strap under every screw)
Sling upholstery attached with machine screws
Quick adjust clutches (combination belt tensioner and belt release mechanism)
Detachable desk length arms Reinforced arm mounts
Anti-tipping wheels
Fully automatic 8A Dual Mode charger (charges Gel-Cell and lead acid batteries)
Detailed Owner's Manual Easy to service and maintain
POPULAR OPTIONS
Front Rigging (footrests or legrests, each with many options)
Arm options Headrests
8"x2" metal front wheels
Power seating systems: recline, tilt, seat elevate, and/or power headrest
Recar seat 2 or more power seating systems combined on same chair
Dual independent power elevating legrests (DIPLR)
UE1E electronics (ECU through-the-joystick proportional control of power seating)
Programmer for electronics Colored (non-black) frame
Specialty controls (sip puff, switch controls, head arrays, etc.; DX or ASL)
Frame reinforcements Custom seat depth, seat height, back height, etc.
Upholstery and solid seating options
Hand / chin control customizations mounting options (many to choose from)
Lighting package (it's 24V and it's bright!) Electric horn (it's LOUD)
Electric leg bag emptier (for unattended leg bag draining) Positioning straps
Wheel locks (with or without wheel lock extensions)
Extended 3 year warranty
BIG BOUNDER H-FRAME POWER WHEELCHAIRS

BIG BOUNDER H-frame with optional 13" seat elevator
STANDARD FEATURES
For users up to 500 lbs (700 and 1000 lb options available at extra cost)
Seat widths from 21" to 48" (by 1" increments) at no additional cost
Seat depths from 16" to 20" (by 1" increments) at no additional cost; deeper at extra cost
Durable H-style TIG welded frame using 2.5"x1.5"x0.125" wall steel
Fast! Top speeds up to 9.5 MPH (15.3 kph)
Super Torque 3 Motors Brakes (ST3MB)
Quiet non-slip Panther synchronous gear belt drive
Sliding dual group 27 battery box with safety reflectors
UE1D premium electronics (6 programs with bi-directional select switch)
Built in taillights Electric brake control (Drive Chair / Set Brakes)
Battery condition meter Smart brake release switch (for easy attendant pushing)
Heavy duty 12 position adjustable suspension forks
Super Duty caster barrels and suspension forks (5/8" fork stems bearings ID's)
9"x3.50" metal caster wheels 12.75" x 4.00" steel rear wheels
0.120" wall seat rails and back posts
Black powder coated frame
Super Duty sling upholstery (double liner, cap and web strap under every screw)
Sling upholstery attached with machine screws
Quick adjust clutches (combination belt tensioner and belt release mechanism)
Detachable desk length arms Reinforced arm mounts
Anti-tipping wheels
Fully automatic 8A Dual Mode charger (charges Gel-Cell and lead acid batteries)
Detailed Owner's Manual
Easy to service and maintain
POPULAR OPTIONS
Front Rigging (footrests or legrests, each with many options)
Arm options Headrests
Power 700 / Power 1000 options to increase max user weight to 700 / 1000 lbs, respectively.
8"x2" metal front wheels
Power seating systems: recline, tilt, seat elevate, and/or power headrest
2 or more power seating systems combined on same chair
Dual independent power elevating legrests (DIPLR)
UE1E electronics (ECU through-the-joystick proportional control of power seating)
Programmer for electronics Colored (non-black) frame
Specialty controls (sip puff, switch controls, head arrays, etc.; DX or ASL)
Frame reinforcements Custom seat depth(>20"), seat height, back height, etc.
Upholstery and solid seating options
Hand / chin control customizations mounting options (many to choose from)
Lighting package (it's 24V and it's bright!) Electric horn (it's LOUD)
Electric leg bag emptier (for unattended leg bag draining) Positioning straps
Wheel locks (with or without wheel lock extensions)
Extended 2 or 3 year warranty
POWER WHEELCHAIR SELECTION GUIDE
Conventional "Tubular" Frames

BOUNDER Plus Conventional "Tubular" Frame
THE BOUNDER POWER WHEELCHAIR
Conventional "Tubular" Style Frame
FOR USERS UP TO 250 LBS

BOUNDER with red wraparound back upholstery and optional Dual Head
Lamp Package
The BOUNDER is one of the world's highest performance power wheelchairs!
This chair is routinely configured for top speeds of about 9 MPH (14.49 kph).
Slower configurations are available to meet special user needs. Control is
fully proportional. Drive train ratios and program parameters can be adjusted
in the field for slower top speeds.
Driving range is excellent: over 40 miles per charge (individual range may
vary depending on actual driving conditions). A Sliding Dual Group 27 Battery
Box is standard. It will accommodate 85 AHr deep cycle Gel-Cell (recommended)
or 105 AHr deep cycle Lead-Acid Group 27 batteries.
Strength and durability are built into all BOUNDER chairs. The rugged TIG
welded frame utilizes .065 and .120 wall steel tubing for
uncompromised strength and durability. The standard 12 Position Adjustable
Suspension Fork, made of ¼" thick steel, provides impact dampening and
seat tilt adjustment. Super Duty caster barrels and even solid bar stock
can be installed in portions of the frame that require added strength.
STANDARD FEATURES
For users up to 250 lbs 16", 17" or 18" seat widths
Durable - TIG welded frame with 0.065" and 0.120" wall steel tubing
Conventional tube frame styling Fast! Top speeds up to 9.2 MPH (14.8 kph)
Super Torque 1 Motors Brakes (ST1MB)
Sliding dual group 27 battery box with safety reflectors
UE1D premium electronics (6 programs with bi-directional select switch)
Battery condition meter Smart brake release switch (for easy attendant pushing)
Electric brake control (Drive Chair / Set Brakes)
Standard caster barrels and suspension forks (1/2" dia fork stems bearing ID's)
Heavy duty 12 position adjustable suspension forks
8"x2" plastic caster wheels Black powder coated frame
16"x2.125" or 20"x2.125" "Mag style" aluminum rear wheels with safety reflectors
Standard sling upholstery attached with machine screws
Quick adjust clutches (combination belt tensioner and belt release mechanism)
Detachable desk length arms Reinforced arm mounts
Anti-tipping wheels
Fully automatic 8A Dual Mode charger (charges Gel-Cell and lead acid batteries)
Detailed Owner's Manual Easy to service and maintain
WARRANTY*
ONE year warranty on entire chair
3 year warranty on Super Torque 1 Motor Brake drive trains**
3 year warranty on frame
* Limited warranties - some restrictions apply. See complete warranty for more information
** Includes motors, brakes, drive wheels, drive wheel pulleys/sprockets (drive belts, tires, inner tubes, flat-free inserts, motor pulleys/sprockets and bearings not included)
POPULAR OPTIONS
Front Rigging (footrests or legrests, each with many options)
Arm options Headrests
Super Duty caster barrels and suspension forks (5/8" fork stems bearings ID's)
Choice of 1 power seating system: recline, tilt or seat elevate
Dual independent power elevating legrests (DIPLR)
UE1E electronics (ECU through-the-joystick proportional control of power seating)
Programmer for electronics
Colored (non-black) frame
Frame reinforcements 8"x2" metal caster wheels
Custom seat depth, seat height, back height, etc.
Upholstery and solid seating options
Hand / chin control customizations mounting options (many to choose from)
Lighting package (it's 24V and it's bright!)
Electric horn (it's LOUD)
Electric leg bag emptier (for unattended leg bag draining) Positioning straps
Wheel locks (with or without wheel lock extensions)
Extended 2 or 3 year warranty
NOT AVAILABLE: Order a BOUNDER Plus for these items!
Super Torque 3 Motors Brakes (ST3MB)
Non-slip Panther synchronous gear belt drive
Seat Widened Over Wheels
2 or more power seating systems combined on same chair
Power headrest Recar seat
Specialty controls (sip puff, switch controls, head arrays, etc.; DX or ASL)

BOUNDER PLUS POWER WHEELCHAIR
Conventional "Tubular" Style Frame
FOR USERS UP TO 500 LBS (or who are tough on equipment)

Custom White BOUNDER Plus
The BOUNDER Plus offers all the standard features of the BOUNDER
Plus
STANDARD FEATURES
For users up to 500 lbs (or who are tough on equipment or want more speed)
Durable - TIG welded frame with 0.065" and 0.120" wall steel tubing
16", 17", 18", 19" 20" seat widths (14" 15" widths available at extra cost)
Conventional tube frame styling Fast! Top speeds up to 12.2 MPH (19.6 kph)
Super Torque 3 Motors Brakes (ST3MB)
Sliding dual group 27 battery box with safety reflectors
UE1D premium electronics (6 programs with bi-directional select switch)
Electric brake control (Drive Chair / Set Brakes)
Battery condition meter Smart brake release switch (for easy attendant pushing)
Heavy duty 12 position adjustable suspension forks
Super Duty caster barrels and suspension forks (5/8" fork stems bearings ID's)
8"x2" plastic caster wheels
16"x2.125" or 20"x2.125" "Mag style" aluminum rear wheels with safety reflectors
0.120" wall seat rails 0.065" wall tandem cross struts
Reinforced rear wheel mounts (extra gussets added) Black powder coated frame
Super duty sling upholstery (double liner, cap and web strap under every screw)
Sling upholstery attached with machine screws
Quick adjust clutches (combination belt tensioner and belt release mechanism)
Detachable desk length arms Reinforced arm mounts
Anti-tipping wheels
Fully automatic 8A Dual Mode charger (charges Gel-Cell and lead acid batteries)
Detailed Owner's Manual
Easy to service and maintain

Teal color BOUNDER Plus
with 16" rear wheels and 9" metal front wheels
POPULAR OPTIONS
Front Rigging (footrests or legrests, each with many options)
Arm options Headrests
8"x2", 9"x2.75", 9"x3.50" or 10"x3" metal caster wheels
Seat Widened Over Rear Wheels (SWOW and SWOW NARROW)
Non-slip Panther synchronous gear belt drive
Power seating systems: recline, tilt, seat elevate, and/or power headrest
Recar seat 2 or more power seating systems combined on same chair
Dual independent power elevating legrests (DIPLR)
UE1E electronics (ECU through-the-joystick proportional control of power seating)
Programmer for electronics Colored (non-black) frame
Specialty controls (sip puff, switch controls, head arrays, etc.; DX or ASL)
Frame reinforcements Custom seat depth, seat height, back height, etc.
Upholstery and solid seating options
Hand / chin control customizations mounting options (many to choose from)
Lighting package (it's 24V and it's bright!) Electric horn (it's LOUD)
Electric leg bag emptier (for unattended leg bag draining) Positioning straps
Wheel locks (with or without wheel lock extensions) Extended 3 year warranty

BIG BOUNDER POWER WHEELCHAIR
Conventional "Tubular" Style Frame
FOR USERS UP TO 500 LBS NEEDING 21" OR WIDER SEAT
POWER 700 OPTION FOR USERS UP TO 700 LBS
POWER 1000 OPTION FOR USERS UP TO 1000 LBS
The BIG BOUNDER bariatric power wheelchair is manufactured in virtually any dimension and can accommodate users up to 500 lbs. Powerful Super Torque 3 motors and brakes are standard on both the conventional and the H-frame styles.
BIG BOUNDER drive trains can be configured for a wide range of top speeds. For users between 300 and 400 lbs, top speed is usually configured between 6.5 and 8 MPH. For users between 400 and 500 lbs, top speed is usually configured between 6 and 7 MPH. Control is fully proportional. Drive train ratios and program parameters can be adjusted in the field for slower top speeds.
The BIG BOUNDER with Power 700 Option is available for users between 500 and 700 lbs, or for lighter users who want a more rugged chair. For conventional style frames this option includes 9 x 2.75 or 9"x3.50" metal caster wheels and suspension forks, reinforced front rigging and thicker tubing. For H-frames it includes reinforced front rigging and thicker seat tubing. For 500 to 700 lb users, top speed is usually configured to be a little over 6 MPH.The BIG BOUNDER with Power 1000 option is available if you need a BIG power chair that can carry up to a 1000 lb user! It includes Power 700 features plus extra frame/seat reinforcements and oversized 3/8" diameter fork pivot bolts. Required and included are 9"x3.50" caster wheels and the warranty is increased to cover up to 1,000 lb user. The conventional style frame also includes dual tandem rear wheels. Top speed is usually configured to be a little under 6 MPH.
21st Century Scientific, Inc.'s unique Seat Widened Over Rear Wheels options (SWOW and SWOW NARROW) can reduce the overall width of the chair conventional style frame by as much as 3" and 5", respectively. This may make the difference between using standard doorways or remodeling a home.
STANDARD FEATURES of the BIG BOUNDER Conventional "tubular" style
For users up to 500 lbs (700 and 1000 lb options available at extra cost)
Durable - TIG welded frame with 0.065" and 0.120" wall steel tubing
Seat widths from 21" to 48" (by 1" increments) at no additional cost
Seat depths from 16" to 20" (by 1" increments) at no additional cost; deeper at extra cost
Conventional tube frame styling Fast! Top speeds up to 10 MPH (16.1 kph)
Super Torque 3 Motors Brakes (ST3MB)
Sliding dual group 27 battery box with safety reflectors
UE1D premium electronics (6 programs with bi-directional select switch)
Electric brake control (Drive Chair / Set Brakes)
Battery condition meter Smart brake release switch (for easy attendant pushing)
Heavy duty 12 position adjustable suspension forks
Super Duty caster barrels and suspension forks (5/8" fork stems bearings ID's)
8"x2" metal caster wheels
16"x2.125" or 20"x2.125" "Mag style" aluminum rear wheels with safety reflectors
Most tubing 0.120" wall, including seat rails and tandem cross struts
Reinforced rear wheel mounts (extra gussets added)
Black powder coated frame
Super Duty sling upholstery (double liner, cap and web strap under every screw)
Sling upholstery attached with machine screws
Quick adjust clutches (combination belt tensioner and belt release mechanism)
Detachable desk length arms Reinforced arm mounts
Anti-tipping wheels
Fully automatic 8A Dual Mode charger (charges Gel-Cell and lead acid batteries)
Detailed Owner's Manual
Easy to service and maintain
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