IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0440164
(2003-05-19)
|
우선권정보 |
IE-20000949 (2000-11-21); IE-S20010347 (2001-04-09) |
발명자
/ 주소 |
- Walsh, Thomas Donal
- Tierney, Patrick
|
출원인 / 주소 |
- Arrow Technology Systems Limited
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
7 인용 특허 :
12 |
초록
▼
A trolley wheel mechanism has two caster wheel assemblies each having a pair of wheels mounted on a rotatable housing. In a free mode the wheels are free to both rotate and to swivel. This is caused by the user pressing a release pedal. In a unidirectional mode a retainer lock engages a brake disc t
A trolley wheel mechanism has two caster wheel assemblies each having a pair of wheels mounted on a rotatable housing. In a free mode the wheels are free to both rotate and to swivel. This is caused by the user pressing a release pedal. In a unidirectional mode a retainer lock engages a brake disc to prevent swivelling of the housing. This is caused by the user pressing both pedals simultaneously. A brake mode is caused by the user pressing the apply pedal.
대표청구항
▼
1. A trolley wheel mechanism comprisingat least one caster wheel, a user actuator, a brake mechanism for applying a brake to the at least one castor wheel according to user control of the user actuator, and a retainer mechanism for retaining the at least one castor wheel in an in-line position in re
1. A trolley wheel mechanism comprisingat least one caster wheel, a user actuator, a brake mechanism for applying a brake to the at least one castor wheel according to user control of the user actuator, and a retainer mechanism for retaining the at least one castor wheel in an in-line position in response to user control of the user actuator, the user actuator comprises an apply actuator and a release actuator, the apply actuator and the release actuator being movable independent of each other, the brake mechanism applying a brake to the at least one castor wheel in response to a user input on only the apply actuator and releasing the brake in response to a user input on only the release actuator, the retainer mechanism retaining the at least one castor wheel in the in-line position in response to simultaneous user inputs on both the apply actuator and the release actuator. 2. The trolley wheel mechanism as claimed in claim 1, wherein the apply actuator and the release actuator are separate foot pedals.3. The trolley wheel mechanism as claimed in claim 1, wherein the retainer mechanism comprises a retaining lock on a wheel support or a mechanism frame member, the retaining lock comprises a lock mechanism for engagement in a retaining position upon swiveling of the at least one castor wheel to an in-line position.4. The trolley wheel mechanism as claimed in claim 3, wherein the retaining lock is mounted for engagement between a rotatable support for the at least one castor wheel and the brake.5. The trolley wheel mechanism as claimed in claim 4, wherein the brake is movable between three operative positions as follows:a free position at which the brake is not applied to the at least one castor wheel and the brake is not engaged with the retaining lock in a free mode; a unidirectional position at which the brake is not applied to the at least one castor wheel but is in engagement with the retaining lock in a unidirectional mode; and a braking position at which the brake is applied to the wheel in a braking mode. 6. The trolley wheel mechanism as claimed in claim 3, wherein the retaining lock is resilient for snap-fitting engagement upon swivelling of the at least one castor wheel to an in-line position when the mechanism is in the unidirectional mode.7. The trolley wheel mechanism as claimed in claim 1, further comprising at least two caster wheels for use on laterally opposed sides of a trolley.8. The trolley wheel mechanism as claimed in claim 5, wherein the brake mechanism and the retainer mechanism comprise an element which is movable between free, unidirectional, and braking positions in response to the user actuator.9. The trolley wheel mechanism as claimed in claim 8, wherein the element supports a brake, and the braking position is at a lowermost location of the element.10. The trolley wheel mechanism as claimed in claim 8, wherein the element engages with the retaining lock at the unidirectional position.11. The trolley wheel mechanism as claimed in claim 8, wherein the user actuator comprises a cam shaft mounted to move the element in response to user inputs.12. The trolley wheel mechanism as claimed in claim 1, further comprising an apply link and a release link interconnecting the release and apply actuators, and for connection with another trolley wheel mechanism.13. The trolley wheel mechanism as claimed in claim 12, wherein said links cause the apply actuator to move to a home position in response to a user input with the release actuator, and cause the release actuator to move to a home position in response to a user input with the apply actuator.14. The trolley comprising a trolley body and at least one wheel mechanism as claimed in claim 1.15. A trolley mechanism comprisingat least one caster wheel, a user actuator, a brake mechanism for applying a brake to the at least one castor wheel according to user control of the user actuator, a retainer mechanism for retaining the at least one castor wheel in an in-line position in response to the user control of the user actuator, the user actuator comprises an apply actuator and a release actuator, the apply actuator and the release actuator being movable independent of each other, the brake mechanism applies a brake to the at least one castor wheel in response to a user input on the apply actuator and releases the brake in response to a user input on the release actuator, the retainer mechanism retaining the at least one castor wheel in the in-line position in response to simultaneous user inputs on both the apply actuator and the release actuator, the retainer mechanism and the brake mechanism provide three modes as follows: a free mode in which at least one castor the wheel is not braked and the at least one castor wheel is free to swivel, a undirectional mode in which the at least one castor wheel is retained in the in-line position but is not braked, and a braking mode in which the at least one castor wheel is retained in the in-line position and is braked; and wherein the retainer mechanism and the brake mechanism directly change between the undirectional mode and the braking mode, the at least one castor wheel being retained in the in-line position during the transition.
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