Could I attach this to an existing handbar above the window on the inside, which is too high for my mother to reach?

Don't see reason why not. It attaches to the top of the window frame. It is not as stable as the one mounted on the ceiling, and thus not so good alone but in combo with the door frame/handle it should be easy to learn.

Would it be something I could keep in my bag and use with different people that give me rides home from church and to dr. ? ? ?

Hi Jacque! I purchased this exclusively for my mother's use! And because my family and her friends take turns in giving her rides (Church, Doctors appointments, movies, grandchildren, etc.) She can adjust the Car Caddie to ANYONE'S car, van, truck. It has a quick connect/disconnect clip which she can clip to outside of roof rack, or inside the car on the door frame from the window. The best part it is super strong, lightweight and weighs ounces and folds/wraps into the palm of her hand or stashed in her bag! It is portable and a tool which aids her in getting into and out of anyone's vehicle, which maintains her independence and dignity. I hope my review was helpful!

The manufacturer's web site says you close the window after you hook it on the frame. Is that necessary or can you leave the window down?

Aug 18, 2022, I see in the Stander Car Caddie video (Standers Inc) on Amazon, that the strap being is used on the window frame and the window is open (woman's hand wraps around the open window frame once she's standing). However, I see the seller's reply above states it is intended to be used with the window closed so the strap will not slip across the top of the window frame. Perhaps you should contact the company for the definitive answer. I'm sure you know, it's most important to be safe.

Would it be possible to hook this on the refridgerator for my service dog to be able to open the door?

Alicia- I bought mine 2 yrs ago to assist my elderly father in and out of my car. It never worked very well. I would be fearful of having it hooked on the frig door. Depending on how strong and type of service dog you own, it might work. If I could locate the one I bought I would just ship it to you free of charge. I would need your mailing address. Jeri W.

ASIN	B000GUDGUU
Best Sellers Rank	#255,064 in Health & Personal Care ( See Top 100 in Health & Personal Care ) #2,701 in Mobility Aids & Equipment
Brand	Stander
Brand Name	Stander
Colour	Black
Compatible with Vehicle Type	Car
Customer Reviews	4.2 out of 5 stars 2,650 Reviews
Global Trade Identification Number	00002765885076, 00897564000801
Is Foldable	No
Item Dimensions	17.5 x 12.5 x 5 Centimeters
Item Height	5 Centimeters
Item Weight	0.1 Kilograms
Item dimensions L x W x H	17.5 x 12.5 x 5 Centimeters
Load Capacity	113 kg
Manufacturer	Stander
Material	Nylon, Rubber
Material Type	Nylon, Rubber
Mounting Type	Strap
UPC	002765885076 634154117484 611104962165 001910628001 010315305622 741360190078 703570160623 698798593103 811223993716 885329291991 877775669509 635983074801 611104883040 880908112346 885708007489 897564000801 921227309311 066510062921 767644490269 913201337816 890218918057 095614894800 601000557473 004000831923 885345641503 073564853948 848296041396 698798608081 001910520756 795186365431 6212273217…
Unit Count	1.0 Count
Vehicle Service Type	Car

Stander Car Caddie – Support Handle - Sturdy Nylon Strap - Non Slip Rubber Contour Grip –– Easy Installation (Black)

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