Claims
- 1. In a door closer attached to an associated door and having a rod which moves within resilient sleeve means for resisting said rod movement as said door is moved between fully open and closed positions, the improvement comprising
- at least one enlargement on said rod, said enlargement being sized and longitudinally located on said rod so as to pass through said sleeve means and to increase the resistance of said sleeve means to movement of said rod therein while said door moves through a partially open position, and
- means for longitudinally compressing said sleeve means as said door is moved from the closed position toward the fully open position,
- said enlargement being elongated in the axial direction of said rod and continuously increasing in size along the entire length of said enlargement along the length of said rod for always continuously increasing the resistance of said sleeve means to said rod movement during the entire movement of said door from an intermediate position to the fully open position.
- 2. The invention set forth in claim 1 wherein said sleeve is formed of silicone rubber.
- 3. The invention set forth in claim 1 wherein
- said enlargement is an embossment.
- 4. A door closer according to claim 1 wherein
- said sleeve means comprises a plurality of separate, axially aligned elastomeric tubular members through which said piston rod extends.
- 5. In a door closer according to claim 1,
- said intermediate position being between about 60.degree. and 70.degree. of the fully open position of said door.
- 6. A door closer for connecting a door member to a frame member comprising in combination
- an elongated cylinder,
- a piston mounted in said cylinder for axial movement in said cylinder,
- a piston rod connected at one end to said piston and extending out through one end of said cylinder,
- means for connecting said piston rod to one of said door or frame members,
- means for connecting said cylinder to the other one of said door or frame members,
- spring means disposed within said cylinder and surrounding said rod,
- brake means having an opening therethrough through which said rod extends, and
- said spring means being compressed between said piston and said brake means for exerting an increasing axial compressive force on said brake means as said door member swings in an opening direction,
- said brake means including a tubular retainer and elastomeric sleeve means positioned within said retainer and through which said rod extends,
- said sleeve means extending outwardly from both ends of said retainer,
- said retainer including an annular flange disposed intermediate the ends thereof,
- said sleeve means comprising a plurality of elastomeric sleeves respectively abutting said flange,
- one end of each of said sleeves abutting said flange, and
- the other end of each of said sleeves being disposed outside of said retainer.
- 7. In a door closer attached to an associated door and having a rod which moves within resilient sleeve means for resisting said rod movement as said door is moved between fully open and closed positions, the improvement comprising
- at least one enlargement on said rod,
- said enlargement being sized and longitudinally located on said rod so as to pass through the said sleeve means and to increase the resistance of said sleeve means to movement of said rod therein while said door moves through a partially open position,
- means for longitudinally compressing said sleeve means as said door is moved from the closed position toward the fully open position,
- a plurality of additional enlargements on said rod,
- said enlargements being progressively larger in size toward the portion of said rod which is disposed in said sleeve means when said door is fully open providing for progressive increase in the resistance of said sleeve means to said rod movement while said door moves through said partially open position.
Parent Case Info
This application is a continuation-in-part of abandoned application Ser. No. 424,059, filed by us on Sept. 27, 1982, now abandoned.
US Referenced Citations (8)
Foreign Referenced Citations (3)
Number |
Date |
Country |
2449661 |
Apr 1976 |
DEX |
1414880 |
Sep 1965 |
FRX |
2482650 |
Nov 1981 |
FRX |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
424059 |
Sep 1982 |
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